Objective:To clarify the effect of endurance training on the expression profile of circRNA-lncRNA-miRNA-mRNA in myocardial tissues of mice after exhaustive exercise.Methods:A total of 45 male C57BL/6 mice were randoml...Objective:To clarify the effect of endurance training on the expression profile of circRNA-lncRNA-miRNA-mRNA in myocardial tissues of mice after exhaustive exercise.Methods:A total of 45 male C57BL/6 mice were randomly divided into control(C),low-strength endurance training(LSET)and high-strength endurance training(HSET)groups(n=15).The mice in the control group were not conducted to platform training.The mice in the LSET and HSET groups were conducted to platform training at 30%and 60%of exhaustive exercise once a day for 5 days a week,respectively.The exhaustion exercise was performed after 5 weeks of platform training.Total RNA was extracted from myocardial tissues,and the expression profile of circRNA-lncRNA-miRNA-mRNA in myocardial tissues was analyzed using Illimina transcriptome sequencing.Results:The distance and time of exhaustive exercise were longer in the LSET and HSET groups than in the control group,and the distance and time of exhaustive exercise were longer in the HSET group than in the LSET group(P<0.05).A total of 54 differentially expressed circRNAs(28 down-regulated and 26 up-regulated),7 differentially expressed lncRNAs(all down-regulated),3 differentially expressed miRNAs(1 down-regulated and 2 up-regulated)and 99 differentially expressed mRNAs(81 down-regulated and 18 up-regulated)were identified by transcriptome sequencing(P<0.05).Interaction network analysis revealed that ENSMUSG00000113041,MSTRG.79740,mmu-miR-374c-5p,18 down-regulated mRNAs and 3 up-regulated mRNAs formed a regulatory network.GO functional analysis revealed that the differentially expressed mRNAs were mainly enriched in primary metabolic processes and macromolecular synthesis and metabolic processes.KEGG pathway analysis revealed that the differentially expressed mRNAs were mainly enriched in complement and coagulation cascade pathways,estrogen signaling pathway and glucagon signaling pathway.Conclusion:Endurance training could alter the expression profile of circRNA-lncRNA-miRNA-mRNA in myocardial tissues of mice after exhaustive exercise,and these differentially expressed RNAs form a regulatory network that affects cardiomyocyte synthesis and metabolism and thus participates in the regulation of myocardial injury.展开更多
Objective: To investigate the expression of myocardium connexin 43(Cx43) in late exercise preconditioning(LEP) cardioprotection. Methods: Eight-week-old adult male Sprague Dawley rats were randomly assigned into four ...Objective: To investigate the expression of myocardium connexin 43(Cx43) in late exercise preconditioning(LEP) cardioprotection. Methods: Eight-week-old adult male Sprague Dawley rats were randomly assigned into four groups(n=8). Myocardial injury was judged in accordance with serum levels of c Tn and NT-pro BNP as well as hematoxylin basicfuchsin picric acid staining of myocardium. Cx43 m RNA was detected by in situ hybridization and qualified by real-time fluorescence quantitative PCR. Cx43 protein was localized by immunohistochemistry and its expression level was determined by western blotting. Results: The LEP obviously attenuated the myocardial ischemia/hypoxia injury caused by exhaustive exercise. There was no significant difference of Cx43 m RNA level between the four groups. Cx43 protein level was decreased significantly in group EE(P<0.05). However, LEP produced a significant increase in Cx43 protein level(P<0.05), and the decreased Cx43 protein level in exhaustive exercise was significantly up-regulated by LEP(P<0.05). Conclusions: LEP protects rat heart against exhaustive exercise-induced myocardial injury by up-regulating the expression of myocardial Cx43.展开更多
Orthogonal frequency division multiplexing(OFDM) is an attractive technology to provide immense improvement in wireless transmission capacity but high peak-to-average power ratio(PAPR) is a major drawback of OFDM syst...Orthogonal frequency division multiplexing(OFDM) is an attractive technology to provide immense improvement in wireless transmission capacity but high peak-to-average power ratio(PAPR) is a major drawback of OFDM system.Selected mapping(SLM) scheme has good performance for PAPR reduction.It requires the transmitting data to be multiplied by random phase sequences.However,the sequences are pseudo-random which will decrease the method effectiveness.Exhaustive entropy is introduced in this paper which can identify the strength of random phase sequences property.Then an exhaustive entropy based on SLM method is proposed.The scheme improves the effectiveness of random phase sequences by selecting the larger exhaustive entropy of them.The simulation results show that the PAPR reduction performance is better than that of conventional SLM through this method.展开更多
BACKGROUND： Exhaustive exercise can lead to apoptosis of skeletal muscle cells and myocardial cells as a result of pathological changes in the corresponding cellular ultrastructure. It is hypothesized that such chang...BACKGROUND： Exhaustive exercise can lead to apoptosis of skeletal muscle cells and myocardial cells as a result of pathological changes in the corresponding cellular ultrastructure. It is hypothesized that such changes could also occur in neurons. OBJECTIVE： To observe brain cell apoptosis and ultrastructural changes in hippocampal neurons in rats following endurance training and acute exhaustive exercise. DESIGN, TIME AND SETTING： A randomized, controlled, morphological analysis was performed at the Medical Laboratory Center of Zhengzhou University between July and November 2007. MATERIALS： Forty male, 8-week-old, Sprague Dawley rats were included in this study. METHODS： Endurance training consisted of treadmill running once a day, 6 days a week, for 4. weeks. For acute exhaustive exercise, graded treadmill running was conducted. Rats were exposed to exercise at an increasing speed （10 m/min, increasing to 20 and 36 m/min for moderate- and high-intensity exhaustive exercise, respectively, and then was continued until exhaustion）. A total of 40 rats were evenly distributed into the following 4. groups： Group A rats were not exercised; Group B rats were not trained but sacrificed 24 hours after acute exhaustive treadmill running exercise; Group C-rats were subjected to endurance training and sacrificed immediately after acute exhaustive treadmill running exercise; Group D rats were subjected to endurance training and sacrificed 24 hours after acute exhaustive treadmill running exercise. MAIN OUTCOME MEASURES： Apoptotic cell death was detected by the TUNEL method and hippocampal neuronal ultrastructural change was observed through using transmission electron microscopy. RESULTS： All 40 rats were included in the final analysis. Subsequent to exhaustive exercise, rat cerebral cortex and hippocampal neurons appeared contracted and degenerated. In addition, high amount of lipofuscin was visible in the hippocampal region, Necrotic neurons encased by glial cells appeared in the cerebral cortex and hippocampus. Glial cells exhibited different degrees of swelling. Subsequent to exhaustive exercise, brain cell apoptosis rate significantly increased, and reached over 30% in some regions, compared with group A （P 〈 0.05）. No significant difference in apoptosis rate existed between groups B, C, and D （P 〈 0.05）. CONCLUSION： Endurance training and acute exhaustive exercise cause, to some degree, injuries to glial cells, resulting in apoptosis of numerous brain cells. Subsequent to exhaustive exercise, high amounts of lipofuscin appear in the hippocampus, indicating that exhaustive exercise possibly contributes to neural cell aging or dysmetabolism.展开更多
A sensitive method for the determination of ephedrine and codeine in human urine by capillary electrophoresis （CE） was described. In order to improve the sensitivity, two online concentration techniques including ca...A sensitive method for the determination of ephedrine and codeine in human urine by capillary electrophoresis （CE） was described. In order to improve the sensitivity, two online concentration techniques including cation-selective exhaustive injection （CSEI） and sweeping micellar electrokinetic chromatography （sweeping-MEKC） were used. Under the optimum conditions, the detection limits （S/N = 3） were 0.10 μg/L for ephedrine and 0.80 μg/L for codeine. This method was successfully applied to real urine sample analysis.展开更多
Objective To explore the effect of moxibustion at ＂Shénquè＂（神阙 CV 8） on the immune system of rats taking long-term exhaustive exercise.Method Thirty male SD rats were randomly divided into blank group,...Objective To explore the effect of moxibustion at ＂Shénquè＂（神阙 CV 8） on the immune system of rats taking long-term exhaustive exercise.Method Thirty male SD rats were randomly divided into blank group,model group and moxibustion group with 10 rats in each group.Except the rats in blank group,all the rats were established into long-term exhaustive models through swimming again and again.Mild moxibustion at CV 8 for 15 min was carried out in the rats in moxibustion group after modeling.The treatment was conducted once every other day,and treatment for 10 times was needed.The exhaustive duration for each time was recorded,the levels of serum Ig A,Ig G,Ig M and ACP were detected 24 h after the 10 th exhaustive exercise,and the histomorphological changes of spleen were observed.Immunoturbidimetry was adopted for detecting the Ig A level,and ELISA method was used for detecting the levels of Ig G,Ig M and ACP.Results The common exhaustive duration in moxibustion group was longer than that in model group,however,the time difference was statistically significant after the 5th exhaustive exercise（P0.01）.The levels of serum IgG and IgM in model group were lower than that in blank group（all P0.01）,and the serum ACP level in model group was higher than that in blank group（P0.01）,indicating that the splenic histomorphology was damaged.The levels of serum Ig G and Ig M in moxibustion group were higher than that in model group（all P0.01）,and the serum ACP level in moxibustion group was lower than that in model group,showing that the splenic histomorphology was repaired.Conclusion Moxibustion at CV 8 can improve the levels of immunoglobulin（Ig G,Ig A,Ig M） of tired body for a long time,decrease the ACP level,and repair the damaged spleen tissues.展开更多
Objective To explore the effect of moxibustion at Shenque （神阙 CV 8） on the anti-exercise-induced fatigue in rats after exhaustive exercise in varying degrees. Methods Seventy-two SD rats were randomly divided int...Objective To explore the effect of moxibustion at Shenque （神阙 CV 8） on the anti-exercise-induced fatigue in rats after exhaustive exercise in varying degrees. Methods Seventy-two SD rats were randomly divided into 3 groups according to the random number table method, including blank group, model group and moxibustion group. The model group and moxibustion group were divided into 4 subgroups respectively, that was 1 time, 4 times, 7 times and 10 times subgroup. There were 9 groups with 8 rats in each group. Except blank group, all the rats were established into exhaustive models through swimming. Mild moxibustion at CV 8 was carried out for 15 min in the rats in moxibustion group after modeling for once every other day. The concentration of serum glucose （GLU）, malonaldehyde （MDA） and blood urea nitrogen （BUN） as well as the activity of aspartate transaminase （AST）, alanine transaminase （ALT） and lactic dehydrogenase （LDH） were detected 24h after the exhaustive exercise by adopting full-automatic analyzer. Results The exhaustive time of rats were long at first but shorter later. The exhaustive time of rats in the model group （4 times） were obviously longer than that in the model group （1 time） （P〈0.01）, the exhaustive time of rats in the model group （7 times） and model group （10 times） were obviously shorter than that in the model group （1 time） （P〈0.01）, and the exhaustive time of rats in the moxibustion group （7 times） and moxibustion group （10 times） were obviously longer than that in the model group with the same number of times （P〈0.01）, the serum GLU level of rats in the model group （7 times） and model group （10 times） increased when compared with the blank group （P〈0.01）, and the serum MDA and BNU levels as well as the activity of AST, ALT and LDH of rats in the model group （4 times）, model group （7 times） and model group （10 times） increased when compared with the blank group （P〈0.05 or P〈0.01）, the serum GLU, MDA and BNU levels as well as the activity of AST and ALT of rats in the moxibustion group （7 times） and moxibustion group （10 times） reduced when compared with the model group with the same number of times （P〈0.05 or P〈0.01）, and the serum LDH activity of rats in the moxibustion group （4 times）, moxibustion group （7 times） and moxibustion group （10 times） reduced when compared with the model group with the same number of times （P〈0.05 or P〈0.01）. Conclusion Moxibustion at CV 8 can reduce the serum MDA and BNU levels as well as the activity of AST, ALT and LDH of organism in a status of long-term fatigue, effectively improve the symptom of long-term fatigue, providing a certain experimental basis for the clinical application of moxibustion at CV 8 in the process of anti-exercise-induced fatigue in the future.展开更多
Highway maintenance mileage reached 5.25 million kilometers in China by 2021.Ultra-thin overlay is one of the most commonly used maintenance technologies,which can significantly enhance the economic and environmental ...Highway maintenance mileage reached 5.25 million kilometers in China by 2021.Ultra-thin overlay is one of the most commonly used maintenance technologies,which can significantly enhance the economic and environmental benefits of pavements.To promote the low-carbon development of ultrathin overlays,this paper mainly studied the mechanism and influencing factors of several ultra-thin overlay functions.Firstly,the skid resistance,noise reduction,rutting resistance,and crack resistance of ultrathin overlays were evaluated.The results indicated that the high-quality aggregates improved the skid and rutting resistance of ultra-thin overlay by 5%-20%.The optimized gradations and modified binders reduced noise of ultra-thin overlay by 0.4-6.0 dB.The high viscosity modified binders improved the rutting resistance of ultra-thin overlay by about 10%-130%.Basalt fiber improved the cracking resistance of ultra-thin overlay by more than 20%.Due to the thinner thickness and better road performance,the performance-based engineering cost of ultra-thin overlay was reduced by about 30%-40%compared with conventional overlays.Secondly,several environmentally friendly functions of ultra-thin overlay were investigated,including snow melting and deicing,exhaust gas purification and pavement cooling.The lower thickness of ultra-thin overlay was conducive to the diffusion of chloride-based materials to the pavement surface.Therefore,the snow melting effect of self-ice-melting was better.In addition,the ultra-thin overlay mixture containing photocatalytic materials could decompose 20%-50%of the exhaust gas.The colored ultra-thin overlay was able to reduce the temperature of the pavement by up to 8.1℃.The temperature difference between the upper and lower surfaces of the ultra-thin overlay containing thermal resistance materials could reach up to 12.8℃.In addition,numerous typical global engineering applications of functional ultra-thin overlay were summarized.This review can help better understand the functionality of ultra-thin overlays and promote the realization of future multi-functional and low-carbon road maintenance.展开更多
Objective： To investigate the effect of moxibustion at Shenque （CV 8） on free radical metabolism in rat＇s hippocampus after different degrees of exhaustive exercise. Methods： A total of 72 male Sprague-Dawley （S...Objective： To investigate the effect of moxibustion at Shenque （CV 8） on free radical metabolism in rat＇s hippocampus after different degrees of exhaustive exercise. Methods： A total of 72 male Sprague-Dawley （SD） rats were randomly divided into a normal group （n=8）, a model group （n=32） and a moxibustion group （n=32）. According to the times of modeling or treatment, the model group was further randomly divided into different subgroups of a 1-time model subgroup, a 4-time model subgroup, a 7-time model subgroup and a 10-time model subgroup （n=8）; the moxibustion group was also further randomly divided into different subgroups of a 1-time moxibustion subgroup, a 4-time moxibustion subgroup, a 7-time moxibustion subgroup and a 10-time moxibustion subgroup （n=8）. Rats in both model and moxibustion subgroups were subjected to establishing the swimming exhaustive model. Rats in each moxibustion subgroup received mild moxibustion at Shenque （CV 8） for 15 min immediately after modeling, once every other day. The concentration of malic dialdehyde （MDA）, as well as the activities of superoxide dismutase （SOD）, glutathione peroxidase （GSH-Px） and total antioxidant capacity （T-AOC） in rat＇s hippocampus in each group were detected 24 h after the exhaustive exercise. Results： Compared with the 1-time model subgroup, the exhaustive swimming time of rats was significantly prolonged in the 4-time model subgroup （P〈0.01）, while it was significantly shortened in the 7-time and 10-time model subgroups （both P〈0.01）. Compared with the matched model subgroup, the exhaustive swimming time of rats in the 7-time and 10-time moxibustion subgroups was significantly prolonged （both P〈0.01）. Compared with the normal group, the MDA concentration was increased significantly （P〈0.01）, and the activities stress response of SOD and T-AOC were increased in the 1-time model subgroup （both P〈0.05）; the MDA concentration was increased （all P〈0.01）, and the activities of SOD, GSH-Px and T-AOC were decreased differently （P〈0.05 or P〈0.01） in the 4-time, 7-time and 10-time model subgroups. Compared with the matched model subgroup, the concentration of MDA was significantly reduced （P〈0.05 or P〈0.01）, and the activities of SOD, GSH-Px and T-AOC were significantly increased in the 4-time, 7-time and 10-time moxibustion subgroups （all P〈0.01）. Conclusion： Moxibustion at Shenque （CV 8） can improve the fatigue status of the body after long-term exhaustive exercise by regulating free radical metabolism in rat＇s hippocampus. To some extent, this provides an experimental basis for moxibustion at Shenque （CV 8） against exercise-induced fatigue.展开更多
Background Little is known about the value of 31P-magnetic resonance spectroscopy （31P-MRS） in in vivo assessment of exhaustive exercise-induced injury in skeletal muscle.We aimed to evaluate the value of a 31P-MRS ...Background Little is known about the value of 31P-magnetic resonance spectroscopy （31P-MRS） in in vivo assessment of exhaustive exercise-induced injury in skeletal muscle.We aimed to evaluate the value of a 31P-MRS study using the quadriceps femoris after a single bout of acute exhaustive swimming in rats,and the correlation between 31P-MRS and histological changes.Methods Sixty male Sprague-Dawley rats were randomly assigned to control,half-exhaustive,and exhaustive exercise groups.31P-MRS of the quadriceps femoris of the right lower limb was performed immediately after swimming exercise to detect Pi,PCr,and β-ATP.The Pi/PCr,Pi/β-ATP,PCr/β-ATP,and PCr/（PCr＋Pi） were calculated and pH measured.Areas under the receiver operating characteristic curve （AUCs） were calculated to evaluate the diagnostic potential of 31P-MRS in identifying and distinguishing the three groups.HE staining,electron microscopy and desmin immunostaining after imaging of the muscle were used as a reference standard.The correlation between 31P-MRS and the mean absorbance （A value） of desmin staining were analyzed with the Pearson correlation test.Results Pi,PCr,Pi/PCr,and PCr/（PCr＋Pi） showed statistically significant intergroup differences （P＜0.05）.AUCs of Pi,PCr,Pi/PCr,and PCr/（PCr＋Pi） were 0.905,0.848,0.930,and 0.930 for the control and half-exhaustive groups,while sensitivity and specificity were 90％/85％,95％/55％,95％/80％,and 90％/85％,respectively.The AUCs of Pi,PCr,Pi/PCr and PCr/（PCr＋Pi） were 0.995,0.980,1.000,and 1.000 for the control and exhaustive groups,while sensitivity and specificity were 95％/90％,100％/90％,100％/95％,and 100％/95％,respectively.The AUCs of Pi,PCr,Pi/PCr,and PCr/（PCr＋Pi） were 0.735,0.865,0.903,and 0.903 for the half-exhaustive and exhaustive groups,while sensitivity and specificity were 80％/60％,90％/75％,95％/65％,and 95％/70％,respectively.In the half-exhaustive group,some muscle fibers exhibited edema in HE staining,and the unclear Z-discs and the mitochondria with vacuolar degeneration under electron microscopy.Compared with the half-exhaustive group,muscle fiber edema was increased in the exhaustive group,and the Z-discs were broken and the mitochondria exhibited marked vacuolar degeneration under electron microscopy.There were significant difference in A values of desmin staining in the right vastus lateralis among the control,half-exhaustive,and exhaustive groups with 0.58±0.06,0.30±0.04,and 0.21±0.02,respectively （P＜0.05）.Histological examination also showed injury-induced changes in the vastus lateralis among the different intensities groups.Statistically a moderate correlation between 31P-MRS and desmin was observed,the correlation coefficients of Pi,PCr,Pi/PCr,and PCr/（PCr＋Pi） were-0.706,0.709,-0.726,and 0.791,respectively （P＜0.01）.Conclusions 31P-MRS can effectively reflect the changes in energy metabolism in the skeletal muscle after a single bout of acute exhaustive swimming in rats.Based on the significant correlation between 31P-MRS parameters and histological changes,the changes of Pi,PCr,Pi/PCr,and PCr/（PCr＋Pi） can indirectly reflect the degree of exercise-induced injury.展开更多
Objective: To investigate the effect of moxibustion at Shenque (CV8) on the immune system in rats with different levels of exhaustive exercise. Methods: Fifty-six male Sprague-Dawley (SD) rats were randomly divided in...Objective: To investigate the effect of moxibustion at Shenque (CV8) on the immune system in rats with different levels of exhaustive exercise. Methods: Fifty-six male Sprague-Dawley (SD) rats were randomly divided into a blank group (n=8), an exhaustive group (n=24), and a moxibustion group (n=24). The exhaustive group was randomly divided into a 1-time exhaustive group, a 4-time exhaustive group and a 7-time exhaustive group, with 8 rats in each group. According to the treatment time, the moxibustion group was randomly divided into a 1-time moxibustion group, a 4-time moxibustion group and a 7-time moxibustion group, with 8 rats in each group. Rats in the exhaustive groups and the moxibustion groups were subjected to replicating the exhaustive swimming models. Rats in each moxibustion group received mild moxibustion for 15 min immediately after the exhaustive modeling, once every other day. Twenty-four hours after the corresponding exhaustive exercise, the rats in each group were tested for the levels of serum immunoglobulin (Ig) G, IgA, IgM and acid phosphatase (ACP), and the morphological changes of spleen tissues were observed. The level of IgA was detected by immunoturbidimetric assay, and the levels of IgG, IgM and ACP were detected by en zyme-linked imm uno sorb ent assay (ELISA). Results: Compared with the 1-time exhaustive group, swimming time of rats in the 4-time exhaustive group was significantly proIonged (P<0.01), and swimming time of rats in the 7-time exhaustive group was significantly shortened (P<0.01). Compared with the 7-time exhaustive group, exhaustive swimming time of rats in the 7-time moxibustion group was significantly proIonged (P<0.01). Compared with the blank group, the IgG level in the 1-time exhaustive group was significantly decreased (PvO.Ol), and the levels of IgG, IgA and IgM in the 4-time exhaustive group and the 7-time exhaustive group were all sign ifica ntly decreased (P<0.05 or PvO.Ol), while the ACP level was in creased sign ifica ntly (both P<0.01). Microscopically, the number of splenic corpuscles in the 1-time exhaustive group was reduced;the center of some splenic corpuscles in the 4-time exhaustive group was damaged;the number of splenic corpuscles in the 7-time exhaustive group was reduced, and there was no obvious germinal center. Compared with the 4-time exhaustive group, the IgA level in the 4-time moxibusti on group was sign ifica ntly in creased (P<0.01), and the ACP level was sign ifica ntly decreased (P<0.01). Compared with the 7-time exhaustive group, the levels of IgG, IgA and IgM in the 7-time moxibustion group were sign ifica ntly in creased (all PvO.Ol), and the ACP level was sign ifica ntly decreased (P<0.01). Microscopically, the nu mber of splenic corpuscles in the 1-time moxibustion group was reduced;the center of some splenic corpuscles in the 4-time moxibustion group was damaged together with hyperplasia of some splenic corpuscles;blast cells were proliferated in the center of some splenic corpuscles in the 7-time moxibustion group. Conclusion: Moxibustion at Shenque (CV 8) can improve the levels of IgG, IgA and IgM, reduce the ACP level, repair damaged spleen tissues, and enhance the immunity of the body to some extent in the Iong-term fatigue rats.展开更多
Objective:To observe the effects of moxibustion at Shenshu(BL 23),Zusanli(ST 36)and Shenque(CV 8)on the energy metabolism and endocrine metabolism indicators of rats undergoing one-time exhaustive swimming,and to expl...Objective:To observe the effects of moxibustion at Shenshu(BL 23),Zusanli(ST 36)and Shenque(CV 8)on the energy metabolism and endocrine metabolism indicators of rats undergoing one-time exhaustive swimming,and to explore the differences between moxibustion at different points in the effects on anti-exercise fatigue.Methods:Forty-eight male SPF rats were randomly divided into a blank group,a model group,a non-meridian and non-acupoint group,a Shenshu(BL 23)group,a Zusanli(ST 36)group,and a Shenque(CV 8)group using random number table method,with eight rats in each group.Except for the blank group,rats in the other groups were subjected to replicating the one-time exhaustive model using the weight-bearing swimming experiment.Except for the model group,the other model rats received mild moxibustion immediately after swimming.Rats in the non-meridian and non-acupoint group received mild moxibustion at bilateral subcostal non-meridian and non-acupoint points,those in the Shenshu(BL 23)group received mild moxibustion at bilateral Shenshu(BL 23),those in the Zusanli(ST 36)group received mild moxibustion at bilateral Zusanli(ST 36),and those in the Shenque(CV 8)group received mild moxibustion at Shenque(CV 8)for 15 min.Four hours after the exhaustive swimming,femoral artery blood was collected to detect blood lactate(BLA),lactate dehydrogenase(LDH),creatine kinase(CK),creatinine(CRE),blood urea nitrogen(BUN),cortisol(C)and testosterone(T)levels,and calculate the T/C ratio.Results:Compared with the blank group,rat's serum levels of BLA,LDH,CK,BUN and C in the model group and the non-meridian and non-acupoint group were increased,and serum levels of CRE and T,and T/C ratios were decreased(P<0.01 or P<0.05);compared with the model group and the non-meridian and non-acupoint group,the serum levels of BLA,LDH,CK,BUN and C in the Shenshu(BL 23)group,Zusanli(ST 36)group and Shenque(CV 8)group were decreased,and the serum CRE and T levels,and the T/C ratios were increased(all P<0.01);compared with the Shenshu(BL 23)group,the serum CK level was decreased in the Shenque(CV 8)group(P<0.01),the serum levels of T and C were decreased in the Zusanli(ST 36)group and Shenque(CV 8)group(P<0.01 or P<0.05),and the T/C ratio was increased in the Shenque(CV 8)group(P<0.01);compared with the Zusanli(ST 36)group,the serum CK and BUN levels were decreased(P<0.01,P<0.05),and the T/C ratio was increased in the Shenque(CV 8)group(P<0.05).Conclusion:Moxibustion at Shenshu(BL 23),Zusanli(ST 36)and Shenque(CV 8)shows different anti-fatigue effects by regulating the energy metabolism and endocrine metabolism in rats undergoing one-time exhaustive swimming.Moxibustion at Shenshu(BL 23)is better in promoting energy synthesis.Moxibustion at Shenque(CV 8)is more effective in regulating synthesis and decomposition of the skeletal muscle proteins.展开更多
In exploring persistent infections and malignancies, a distinctive subgroup of CD8^(+) T cells, progenitor exhausted CD8^(+) T(Tpex) cells, has been identified. These Tpex cells are notable for their remarkable self-r...In exploring persistent infections and malignancies, a distinctive subgroup of CD8^(+) T cells, progenitor exhausted CD8^(+) T(Tpex) cells, has been identified. These Tpex cells are notable for their remarkable self-renewal and rapid proliferation abilities. Recent strides in immunotherapy have demonstrated that Tpex cells expand and differentiate into responsive exhausted CD8^(+) T cells, thus underscoring their critical role in the immunotherapeutic retort. Clinical examinations have further clarified a robust positive correlation between the proportional abundance of Tpex cells and enhanced clinical prognosis. Tpex cells have found noteworthy applications in the formulation of inventive immunotherapeutic approaches against tumors. This review describes the functions of Tpex cells in the tumor milieu, particularly their potential utility in tumor immunotherapy. Precisely directing Tpex cells may be essential to achieving successful outcomes in immunotherapy against tumors.展开更多
This paper explores the smoke flow characteristics in tunnel fires,giving a particular emphasis on the effects of different distances between the smoke outlets and the fire source.It examines the smoke behavior under ...This paper explores the smoke flow characteristics in tunnel fires,giving a particular emphasis on the effects of different distances between the smoke outlets and the fire source.It examines the smoke behavior under different conditions,including variations in heat release rates,exhaust volumetric flow rates,spacing between smoke outlets,and the longitudinal fire source positions.Results indicate that altering the fire source positions and the smoke outlets in the tunnel leads to variations in the properties of smoke flow both the fire source upstream and downstream;the distance between fire source and smoke outlet increases gradually,airflow rate decreases initially and eventually reaches a stable state.Similarly,smoke mass flow rate exhibits an increasing trend that eventually reaches a stable state.Moreover,the heat exchange between the tunnel walls and hot smoke increases as the smoke outlet moves further away from the fire source.This interaction leads to a reduction in the heat exhaust coefficient and a decrease in the distance the smoke spreads.This study investigates the impact of altering the relative longitudinal fire source positions and smoke outlet on smoke flow characteristics by numerical simulation.A theoretical analytical method is used to give a predictive model for the heat exhaust coefficient and the smoke spreading distance.This research can support the theory and technical process of tunnel smoke exhaust prevention and control.展开更多
Co-inhibitory receptors serve as crucial regulators of T-cell function,playing a pivotal role in modulating the delicate balance between immune tolerance and autoimmunity.Initially identified in autoimmune disease mod...Co-inhibitory receptors serve as crucial regulators of T-cell function,playing a pivotal role in modulating the delicate balance between immune tolerance and autoimmunity.Initially identified in autoimmune disease models,co-inhibitory receptors,including CTLA-4,PD-1,TIM-3,and TIGIT,were found to be integral to immune regulation.Their blockade or absence in these models resulted in the induction or exacerbation of autoimmune diseases.Additionally,scholars have observed that co-inhibitory receptors on lymphocytes hold the potential to influence the prognosis in the context of chronic inflammation.Consequently,the blocking of co-suppressor receptors has emerged as a novel therapeutic approach for inhibiting refractory inflammatory diseases,particularly rheumatoid arthritis.From the standpoint of traditional Chinese medicine(TCM),the treatment of rheumatoid arthritis based on the“strengthening body resistance(FúZhèng)”theory can be construed as the regulation of co-suppressor receptors to modulate the body’s immune function in combating chronic inflammation.This article provides a succinct overview of the role of co-suppressor receptors in anti-inflammatory processes and explores the research prospects of co-suppressor receptor intervention in the treatment of rheumatoid arthritis.The exploration integrates the“strengthening body resistance(FúZhèng)”theory with relevant Chinese medicine formulations.展开更多
Experiments were conducted in this study to examine the thermal performance of a thermosyphon,made from Inconel alloy 625,could recover waste heat from automobile exhaust using a limited amount of fluid.The thermosyph...Experiments were conducted in this study to examine the thermal performance of a thermosyphon,made from Inconel alloy 625,could recover waste heat from automobile exhaust using a limited amount of fluid.The thermosyphon has an outer diameter of 27 mm,a thickness of 2.6 mm,and an overall length of 483 mm.The study involved directing exhaust gas onto the evaporator.This length includes a 180-mm evaporator,a 70-mm adiabatic section,a 223-mm condenser,and a 97-mm finned exchanger.The study examined the thermal performance of the thermosyphon under exhaust flow rates ranging from 0–10 g/sec and temperatures varying from 300℃–900℃.The influence of three parameters—inclination angle(5°–45°),water mass(2–5.3 g),and the quantity of non-condensable gas Argon(0–0.6 g)—was investigated to assess their impacts on the thermosyphon’s thermal efficiency.The experimental findings revealed that with 3 g of water and 0.0564 g of argon in the thermosyphon,the condenser reached its highest temperature at around 200℃.The ideal fuel loading rate for the thermosyphon falls between 0.2 and 0.7 g/s.Moreover,as inclination angles rise,outer wall temperatures of the thermosyphon increase.This is attributed to the explicit expansion of the effective heating area within the evaporation section,coupled with an amplified gravitational component of the water flux.Additionally,an upsurge in the quantity of non-condensable gas(NCG)can mitigate temperature gradients on the outer wall,resulting in a decline in the thermosyphon’s performance.The insulation applied to the adiabatic section demonstrated efficacy in augmenting temperature gradients on the outer wall,thereby improving the overall performance of the thermosyphon.As the water charge within the thermosyphon increases,there is a corresponding rise in heat transfer rates both from the exhaust to the thermosyphon and from the thermosyphon to the fuel.展开更多
The centralized smoke exhaust system of shield tunnel is an important determinant for tunnel fire safety,and the use of different design parameters of the tunnel smoke exhaust system will affect the smoke exhaust effe...The centralized smoke exhaust system of shield tunnel is an important determinant for tunnel fire safety,and the use of different design parameters of the tunnel smoke exhaust system will affect the smoke exhaust effect in the tunnel,and the influence of different design parameters on the smoke exhaust effect and temperature attenuation of the tunnel can help engineers in designing a more effective centralized smoke exhaust system for the tunnel.In this paper,the Fire Dynamic Simulator(FDS)is utilized to examine smoke exhaust vent settings for a centralized exhaust system in shield tunnel with both flat and sloped conditions,including slopes of+4.5%and−4.5%,under a 30MWfire power with a 150m^(3)/s smoke exhaust rate.The results suggest that maintaining a vent spacing of 60m and a vent size of 4.0 m×1.5 m is a reasonable configuration for centralized smoke exhaust systems in both flat and slope shield tunnels.This choice helpsminimize construction costs and prevent excessive smoke accumulation.It also promotes favorable conditions for maintaining temperature distribution at 2-m height,visibility,smoke spread distance,and temperature below the ceiling,all below the threshold values,while ensuring high smoke extraction efficiency.However,in the slope section,the chimney effect can disrupt exhaust efficiency,visibility,ceiling temperature,and temperature distribution at a height of 2 m.Employing different opening methods,such as having 2 vents up and 4 vents down in a+4.5%slope and 4 vents up and 2 vents down in a−4.5%slope,can help mitigate these effects.Furthermore,the temperature decay formula for shield tunnels follows a bi-exponential decay pattern,and different design parameters of centralized smoke exhaust systems have minimal effects on temperature decay in shield tunnels.展开更多
Rabies is one of the most dangerous and widespread zoonosis and is characterized by severe neurological signs and a high case-mortality rate of nearly 100%. Vaccination is the most effective way to prevent rabies in h...Rabies is one of the most dangerous and widespread zoonosis and is characterized by severe neurological signs and a high case-mortality rate of nearly 100%. Vaccination is the most effective way to prevent rabies in humans and animals. In this study, the relationship between exhaustive exercise and the humoral immune response after immunization with inactivated rabies vaccine was investigated in a mouse model with one-time exhaustive exercise. It was found that compared with the mice with no exercise after vaccination, no significant differences were found in those with exhaustive exercise after vaccination on body-weight changes, virus-neutralizing antibody(VNA) titers, antibody subtypes and survivor ratio after lethal rabies virus(RABV) challenge. This study indicated that exhaustive exercise does not reduce the effects of the rabies inactivated vaccine.展开更多
With the rapid development of DNA technologies, high throughput genomic data have become a powerful leverage to locate desirable genetic loci associated with traits of importance in various crop species. However, curr...With the rapid development of DNA technologies, high throughput genomic data have become a powerful leverage to locate desirable genetic loci associated with traits of importance in various crop species. However, current genetic association mapping analyses are focused on identifying individual QTLs. This study aimed to identify a set of QTLs or genetic markers, which can capture genetic variability for marker-assisted selection. Selecting a set with k loci that can maximize genetic variation out of high throughput genomic data is a challenging issue. In this study, we proposed an adaptive sequential replacement (ASR) method, which is considered a variant of the sequential replacement (SR) method. Through Monte Carlo simulation and comparing with four other selection methods: exhaustive, SR method, forward, and backward methods we found that the ASR method sustains consistent and repeatable results comparable to the exhaustive method with much reduced computational intensity.展开更多
Objective:Liver cancer is a deadly malignancy associated with high mortality and morbidity.Less than 20%of patients with advanced liver cancer respond to a single anti-PD-1 treatment.The high heterogeneity of neutroph...Objective:Liver cancer is a deadly malignancy associated with high mortality and morbidity.Less than 20%of patients with advanced liver cancer respond to a single anti-PD-1 treatment.The high heterogeneity of neutrophils in the tumor immune microenvironment in liver cancer may contribute to resistance to immune checkpoint blockade(ICB).However,the underlying mechanism remains largely unknown.Methods:We established an orthotopic liver cancer model by using transposable elements to integrate the oncogenes Myc and KrasG12Dinto the genome in liver cells from conditional Trp53 null/null mice(pTMK/Trp53^(-/-)).Flow cytometry and immunohistochemistry were used to assess the changes in immune cells in the tumor microenvironment.An ex vivo coculture assay was performed to test the inhibitory effects of tumor-associated neutrophils(TANs)on CD8^(+)T cells.The roles of neutrophils,T cells,and NK cells were validated through antibody-mediated depletion.The efficacy of the combination of neutrophil depletion and ICB was evaluated.Results:Orthotropic pTMK/Trp53^(-/-)mouse liver tumors displayed a moderate response to anti-Ly6G treatment but not PD-1 blockade.Depletion of neutrophils increased the infiltration of CD8^(+)T cells and decreased the number of exhausted T cells in the tumor microenvironment.Furthermore,depletion of either CD8^(+)T or NK cells abrogated the antitumor efficacy of anti-Ly6G treatment.Moreover,the combination of anti-Ly6G with anti-PD-L1 enhanced the infiltration of cytotoxic CD8^(+)T cells and thereafter resulted in a significantly greater decrease in tumor burden.Conclusions:Our data suggest that TANs may contribute to the resistance of liver cancer to ICB,and combining TAN depletion with T cell immunotherapy synergistically increases antitumor efficacy.展开更多
基金The Medical and Health Science and Technology Development Planning Project of Shandong Province(202103011061)。
文摘Objective:To clarify the effect of endurance training on the expression profile of circRNA-lncRNA-miRNA-mRNA in myocardial tissues of mice after exhaustive exercise.Methods:A total of 45 male C57BL/6 mice were randomly divided into control(C),low-strength endurance training(LSET)and high-strength endurance training(HSET)groups(n=15).The mice in the control group were not conducted to platform training.The mice in the LSET and HSET groups were conducted to platform training at 30%and 60%of exhaustive exercise once a day for 5 days a week,respectively.The exhaustion exercise was performed after 5 weeks of platform training.Total RNA was extracted from myocardial tissues,and the expression profile of circRNA-lncRNA-miRNA-mRNA in myocardial tissues was analyzed using Illimina transcriptome sequencing.Results:The distance and time of exhaustive exercise were longer in the LSET and HSET groups than in the control group,and the distance and time of exhaustive exercise were longer in the HSET group than in the LSET group(P<0.05).A total of 54 differentially expressed circRNAs(28 down-regulated and 26 up-regulated),7 differentially expressed lncRNAs(all down-regulated),3 differentially expressed miRNAs(1 down-regulated and 2 up-regulated)and 99 differentially expressed mRNAs(81 down-regulated and 18 up-regulated)were identified by transcriptome sequencing(P<0.05).Interaction network analysis revealed that ENSMUSG00000113041,MSTRG.79740,mmu-miR-374c-5p,18 down-regulated mRNAs and 3 up-regulated mRNAs formed a regulatory network.GO functional analysis revealed that the differentially expressed mRNAs were mainly enriched in primary metabolic processes and macromolecular synthesis and metabolic processes.KEGG pathway analysis revealed that the differentially expressed mRNAs were mainly enriched in complement and coagulation cascade pathways,estrogen signaling pathway and glucagon signaling pathway.Conclusion:Endurance training could alter the expression profile of circRNA-lncRNA-miRNA-mRNA in myocardial tissues of mice after exhaustive exercise,and these differentially expressed RNAs form a regulatory network that affects cardiomyocyte synthesis and metabolism and thus participates in the regulation of myocardial injury.
基金supported by Chinese Postdoctoral Science Foundation(No.2014N560538)Hainan Province Colleges and Universities Scientific Research Project(No.Hnky2015-34)Project of Natural Science Foundation of Hainan Province(314090)
文摘Objective: To investigate the expression of myocardium connexin 43(Cx43) in late exercise preconditioning(LEP) cardioprotection. Methods: Eight-week-old adult male Sprague Dawley rats were randomly assigned into four groups(n=8). Myocardial injury was judged in accordance with serum levels of c Tn and NT-pro BNP as well as hematoxylin basicfuchsin picric acid staining of myocardium. Cx43 m RNA was detected by in situ hybridization and qualified by real-time fluorescence quantitative PCR. Cx43 protein was localized by immunohistochemistry and its expression level was determined by western blotting. Results: The LEP obviously attenuated the myocardial ischemia/hypoxia injury caused by exhaustive exercise. There was no significant difference of Cx43 m RNA level between the four groups. Cx43 protein level was decreased significantly in group EE(P<0.05). However, LEP produced a significant increase in Cx43 protein level(P<0.05), and the decreased Cx43 protein level in exhaustive exercise was significantly up-regulated by LEP(P<0.05). Conclusions: LEP protects rat heart against exhaustive exercise-induced myocardial injury by up-regulating the expression of myocardial Cx43.
基金Sponsored by the National Natural Science Foundation of China (Grant No. 61101126)the Postdoctoral Science Foundation of China (Grant No.2011M500664)
文摘Orthogonal frequency division multiplexing(OFDM) is an attractive technology to provide immense improvement in wireless transmission capacity but high peak-to-average power ratio(PAPR) is a major drawback of OFDM system.Selected mapping(SLM) scheme has good performance for PAPR reduction.It requires the transmitting data to be multiplied by random phase sequences.However,the sequences are pseudo-random which will decrease the method effectiveness.Exhaustive entropy is introduced in this paper which can identify the strength of random phase sequences property.Then an exhaustive entropy based on SLM method is proposed.The scheme improves the effectiveness of random phase sequences by selecting the larger exhaustive entropy of them.The simulation results show that the PAPR reduction performance is better than that of conventional SLM through this method.
文摘BACKGROUND： Exhaustive exercise can lead to apoptosis of skeletal muscle cells and myocardial cells as a result of pathological changes in the corresponding cellular ultrastructure. It is hypothesized that such changes could also occur in neurons. OBJECTIVE： To observe brain cell apoptosis and ultrastructural changes in hippocampal neurons in rats following endurance training and acute exhaustive exercise. DESIGN, TIME AND SETTING： A randomized, controlled, morphological analysis was performed at the Medical Laboratory Center of Zhengzhou University between July and November 2007. MATERIALS： Forty male, 8-week-old, Sprague Dawley rats were included in this study. METHODS： Endurance training consisted of treadmill running once a day, 6 days a week, for 4. weeks. For acute exhaustive exercise, graded treadmill running was conducted. Rats were exposed to exercise at an increasing speed （10 m/min, increasing to 20 and 36 m/min for moderate- and high-intensity exhaustive exercise, respectively, and then was continued until exhaustion）. A total of 40 rats were evenly distributed into the following 4. groups： Group A rats were not exercised; Group B rats were not trained but sacrificed 24 hours after acute exhaustive treadmill running exercise; Group C-rats were subjected to endurance training and sacrificed immediately after acute exhaustive treadmill running exercise; Group D rats were subjected to endurance training and sacrificed 24 hours after acute exhaustive treadmill running exercise. MAIN OUTCOME MEASURES： Apoptotic cell death was detected by the TUNEL method and hippocampal neuronal ultrastructural change was observed through using transmission electron microscopy. RESULTS： All 40 rats were included in the final analysis. Subsequent to exhaustive exercise, rat cerebral cortex and hippocampal neurons appeared contracted and degenerated. In addition, high amount of lipofuscin was visible in the hippocampal region, Necrotic neurons encased by glial cells appeared in the cerebral cortex and hippocampus. Glial cells exhibited different degrees of swelling. Subsequent to exhaustive exercise, brain cell apoptosis rate significantly increased, and reached over 30% in some regions, compared with group A （P 〈 0.05）. No significant difference in apoptosis rate existed between groups B, C, and D （P 〈 0.05）. CONCLUSION： Endurance training and acute exhaustive exercise cause, to some degree, injuries to glial cells, resulting in apoptosis of numerous brain cells. Subsequent to exhaustive exercise, high amounts of lipofuscin appear in the hippocampus, indicating that exhaustive exercise possibly contributes to neural cell aging or dysmetabolism.
基金supported by the Guangxi Provincial Foundation of Natural Science(No.0481019).
文摘A sensitive method for the determination of ephedrine and codeine in human urine by capillary electrophoresis （CE） was described. In order to improve the sensitivity, two online concentration techniques including cation-selective exhaustive injection （CSEI） and sweeping micellar electrokinetic chromatography （sweeping-MEKC） were used. Under the optimum conditions, the detection limits （S/N = 3） were 0.10 μg/L for ephedrine and 0.80 μg/L for codeine. This method was successfully applied to real urine sample analysis.
基金Supported by Natural Science Fund project of youth of Hebei Education Department:QN2016021key scientific project of Administration of Traditional Chinese Medicine of Hebei Province:2016011
文摘Objective To explore the effect of moxibustion at ＂Shénquè＂（神阙 CV 8） on the immune system of rats taking long-term exhaustive exercise.Method Thirty male SD rats were randomly divided into blank group,model group and moxibustion group with 10 rats in each group.Except the rats in blank group,all the rats were established into long-term exhaustive models through swimming again and again.Mild moxibustion at CV 8 for 15 min was carried out in the rats in moxibustion group after modeling.The treatment was conducted once every other day,and treatment for 10 times was needed.The exhaustive duration for each time was recorded,the levels of serum Ig A,Ig G,Ig M and ACP were detected 24 h after the 10 th exhaustive exercise,and the histomorphological changes of spleen were observed.Immunoturbidimetry was adopted for detecting the Ig A level,and ELISA method was used for detecting the levels of Ig G,Ig M and ACP.Results The common exhaustive duration in moxibustion group was longer than that in model group,however,the time difference was statistically significant after the 5th exhaustive exercise（P0.01）.The levels of serum IgG and IgM in model group were lower than that in blank group（all P0.01）,and the serum ACP level in model group was higher than that in blank group（P0.01）,indicating that the splenic histomorphology was damaged.The levels of serum Ig G and Ig M in moxibustion group were higher than that in model group（all P0.01）,and the serum ACP level in moxibustion group was lower than that in model group,showing that the splenic histomorphology was repaired.Conclusion Moxibustion at CV 8 can improve the levels of immunoglobulin（Ig G,Ig A,Ig M） of tired body for a long time,decrease the ACP level,and repair the damaged spleen tissues.
基金Supported by Natural Science Fund Project of Youth of Hebei Education Department:QN2016021Key Scientific Project of Administration of Traditional Chinese Medicine of Hebei Province:2016011 and 2017011
文摘Objective To explore the effect of moxibustion at Shenque （神阙 CV 8） on the anti-exercise-induced fatigue in rats after exhaustive exercise in varying degrees. Methods Seventy-two SD rats were randomly divided into 3 groups according to the random number table method, including blank group, model group and moxibustion group. The model group and moxibustion group were divided into 4 subgroups respectively, that was 1 time, 4 times, 7 times and 10 times subgroup. There were 9 groups with 8 rats in each group. Except blank group, all the rats were established into exhaustive models through swimming. Mild moxibustion at CV 8 was carried out for 15 min in the rats in moxibustion group after modeling for once every other day. The concentration of serum glucose （GLU）, malonaldehyde （MDA） and blood urea nitrogen （BUN） as well as the activity of aspartate transaminase （AST）, alanine transaminase （ALT） and lactic dehydrogenase （LDH） were detected 24h after the exhaustive exercise by adopting full-automatic analyzer. Results The exhaustive time of rats were long at first but shorter later. The exhaustive time of rats in the model group （4 times） were obviously longer than that in the model group （1 time） （P〈0.01）, the exhaustive time of rats in the model group （7 times） and model group （10 times） were obviously shorter than that in the model group （1 time） （P〈0.01）, and the exhaustive time of rats in the moxibustion group （7 times） and moxibustion group （10 times） were obviously longer than that in the model group with the same number of times （P〈0.01）, the serum GLU level of rats in the model group （7 times） and model group （10 times） increased when compared with the blank group （P〈0.01）, and the serum MDA and BNU levels as well as the activity of AST, ALT and LDH of rats in the model group （4 times）, model group （7 times） and model group （10 times） increased when compared with the blank group （P〈0.05 or P〈0.01）, the serum GLU, MDA and BNU levels as well as the activity of AST and ALT of rats in the moxibustion group （7 times） and moxibustion group （10 times） reduced when compared with the model group with the same number of times （P〈0.05 or P〈0.01）, and the serum LDH activity of rats in the moxibustion group （4 times）, moxibustion group （7 times） and moxibustion group （10 times） reduced when compared with the model group with the same number of times （P〈0.05 or P〈0.01）. Conclusion Moxibustion at CV 8 can reduce the serum MDA and BNU levels as well as the activity of AST, ALT and LDH of organism in a status of long-term fatigue, effectively improve the symptom of long-term fatigue, providing a certain experimental basis for the clinical application of moxibustion at CV 8 in the process of anti-exercise-induced fatigue in the future.
基金the National Key Research and Development Program of China(2022YFE0137300)the National Natural Science Foundation of China(52078018)the German Research Foundation(SFB/TRR 339 and 453596084).
文摘Highway maintenance mileage reached 5.25 million kilometers in China by 2021.Ultra-thin overlay is one of the most commonly used maintenance technologies,which can significantly enhance the economic and environmental benefits of pavements.To promote the low-carbon development of ultrathin overlays,this paper mainly studied the mechanism and influencing factors of several ultra-thin overlay functions.Firstly,the skid resistance,noise reduction,rutting resistance,and crack resistance of ultrathin overlays were evaluated.The results indicated that the high-quality aggregates improved the skid and rutting resistance of ultra-thin overlay by 5%-20%.The optimized gradations and modified binders reduced noise of ultra-thin overlay by 0.4-6.0 dB.The high viscosity modified binders improved the rutting resistance of ultra-thin overlay by about 10%-130%.Basalt fiber improved the cracking resistance of ultra-thin overlay by more than 20%.Due to the thinner thickness and better road performance,the performance-based engineering cost of ultra-thin overlay was reduced by about 30%-40%compared with conventional overlays.Secondly,several environmentally friendly functions of ultra-thin overlay were investigated,including snow melting and deicing,exhaust gas purification and pavement cooling.The lower thickness of ultra-thin overlay was conducive to the diffusion of chloride-based materials to the pavement surface.Therefore,the snow melting effect of self-ice-melting was better.In addition,the ultra-thin overlay mixture containing photocatalytic materials could decompose 20%-50%of the exhaust gas.The colored ultra-thin overlay was able to reduce the temperature of the pavement by up to 8.1℃.The temperature difference between the upper and lower surfaces of the ultra-thin overlay containing thermal resistance materials could reach up to 12.8℃.In addition,numerous typical global engineering applications of functional ultra-thin overlay were summarized.This review can help better understand the functionality of ultra-thin overlays and promote the realization of future multi-functional and low-carbon road maintenance.
文摘Objective： To investigate the effect of moxibustion at Shenque （CV 8） on free radical metabolism in rat＇s hippocampus after different degrees of exhaustive exercise. Methods： A total of 72 male Sprague-Dawley （SD） rats were randomly divided into a normal group （n=8）, a model group （n=32） and a moxibustion group （n=32）. According to the times of modeling or treatment, the model group was further randomly divided into different subgroups of a 1-time model subgroup, a 4-time model subgroup, a 7-time model subgroup and a 10-time model subgroup （n=8）; the moxibustion group was also further randomly divided into different subgroups of a 1-time moxibustion subgroup, a 4-time moxibustion subgroup, a 7-time moxibustion subgroup and a 10-time moxibustion subgroup （n=8）. Rats in both model and moxibustion subgroups were subjected to establishing the swimming exhaustive model. Rats in each moxibustion subgroup received mild moxibustion at Shenque （CV 8） for 15 min immediately after modeling, once every other day. The concentration of malic dialdehyde （MDA）, as well as the activities of superoxide dismutase （SOD）, glutathione peroxidase （GSH-Px） and total antioxidant capacity （T-AOC） in rat＇s hippocampus in each group were detected 24 h after the exhaustive exercise. Results： Compared with the 1-time model subgroup, the exhaustive swimming time of rats was significantly prolonged in the 4-time model subgroup （P〈0.01）, while it was significantly shortened in the 7-time and 10-time model subgroups （both P〈0.01）. Compared with the matched model subgroup, the exhaustive swimming time of rats in the 7-time and 10-time moxibustion subgroups was significantly prolonged （both P〈0.01）. Compared with the normal group, the MDA concentration was increased significantly （P〈0.01）, and the activities stress response of SOD and T-AOC were increased in the 1-time model subgroup （both P〈0.05）; the MDA concentration was increased （all P〈0.01）, and the activities of SOD, GSH-Px and T-AOC were decreased differently （P〈0.05 or P〈0.01） in the 4-time, 7-time and 10-time model subgroups. Compared with the matched model subgroup, the concentration of MDA was significantly reduced （P〈0.05 or P〈0.01）, and the activities of SOD, GSH-Px and T-AOC were significantly increased in the 4-time, 7-time and 10-time moxibustion subgroups （all P〈0.01）. Conclusion： Moxibustion at Shenque （CV 8） can improve the fatigue status of the body after long-term exhaustive exercise by regulating free radical metabolism in rat＇s hippocampus. To some extent, this provides an experimental basis for moxibustion at Shenque （CV 8） against exercise-induced fatigue.
基金The study was supported by the grants from National Natural Science Foundation of China，Outstanding Scientific Fund of Shengjing Hospital
文摘Background Little is known about the value of 31P-magnetic resonance spectroscopy （31P-MRS） in in vivo assessment of exhaustive exercise-induced injury in skeletal muscle.We aimed to evaluate the value of a 31P-MRS study using the quadriceps femoris after a single bout of acute exhaustive swimming in rats,and the correlation between 31P-MRS and histological changes.Methods Sixty male Sprague-Dawley rats were randomly assigned to control,half-exhaustive,and exhaustive exercise groups.31P-MRS of the quadriceps femoris of the right lower limb was performed immediately after swimming exercise to detect Pi,PCr,and β-ATP.The Pi/PCr,Pi/β-ATP,PCr/β-ATP,and PCr/（PCr＋Pi） were calculated and pH measured.Areas under the receiver operating characteristic curve （AUCs） were calculated to evaluate the diagnostic potential of 31P-MRS in identifying and distinguishing the three groups.HE staining,electron microscopy and desmin immunostaining after imaging of the muscle were used as a reference standard.The correlation between 31P-MRS and the mean absorbance （A value） of desmin staining were analyzed with the Pearson correlation test.Results Pi,PCr,Pi/PCr,and PCr/（PCr＋Pi） showed statistically significant intergroup differences （P＜0.05）.AUCs of Pi,PCr,Pi/PCr,and PCr/（PCr＋Pi） were 0.905,0.848,0.930,and 0.930 for the control and half-exhaustive groups,while sensitivity and specificity were 90％/85％,95％/55％,95％/80％,and 90％/85％,respectively.The AUCs of Pi,PCr,Pi/PCr and PCr/（PCr＋Pi） were 0.995,0.980,1.000,and 1.000 for the control and exhaustive groups,while sensitivity and specificity were 95％/90％,100％/90％,100％/95％,and 100％/95％,respectively.The AUCs of Pi,PCr,Pi/PCr,and PCr/（PCr＋Pi） were 0.735,0.865,0.903,and 0.903 for the half-exhaustive and exhaustive groups,while sensitivity and specificity were 80％/60％,90％/75％,95％/65％,and 95％/70％,respectively.In the half-exhaustive group,some muscle fibers exhibited edema in HE staining,and the unclear Z-discs and the mitochondria with vacuolar degeneration under electron microscopy.Compared with the half-exhaustive group,muscle fiber edema was increased in the exhaustive group,and the Z-discs were broken and the mitochondria exhibited marked vacuolar degeneration under electron microscopy.There were significant difference in A values of desmin staining in the right vastus lateralis among the control,half-exhaustive,and exhaustive groups with 0.58±0.06,0.30±0.04,and 0.21±0.02,respectively （P＜0.05）.Histological examination also showed injury-induced changes in the vastus lateralis among the different intensities groups.Statistically a moderate correlation between 31P-MRS and desmin was observed,the correlation coefficients of Pi,PCr,Pi/PCr,and PCr/（PCr＋Pi） were-0.706,0.709,-0.726,and 0.791,respectively （P＜0.01）.Conclusions 31P-MRS can effectively reflect the changes in energy metabolism in the skeletal muscle after a single bout of acute exhaustive swimming in rats.Based on the significant correlation between 31P-MRS parameters and histological changes,the changes of Pi,PCr,Pi/PCr,and PCr/（PCr＋Pi） can indirectly reflect the degree of exercise-induced injury.
文摘Objective: To investigate the effect of moxibustion at Shenque (CV8) on the immune system in rats with different levels of exhaustive exercise. Methods: Fifty-six male Sprague-Dawley (SD) rats were randomly divided into a blank group (n=8), an exhaustive group (n=24), and a moxibustion group (n=24). The exhaustive group was randomly divided into a 1-time exhaustive group, a 4-time exhaustive group and a 7-time exhaustive group, with 8 rats in each group. According to the treatment time, the moxibustion group was randomly divided into a 1-time moxibustion group, a 4-time moxibustion group and a 7-time moxibustion group, with 8 rats in each group. Rats in the exhaustive groups and the moxibustion groups were subjected to replicating the exhaustive swimming models. Rats in each moxibustion group received mild moxibustion for 15 min immediately after the exhaustive modeling, once every other day. Twenty-four hours after the corresponding exhaustive exercise, the rats in each group were tested for the levels of serum immunoglobulin (Ig) G, IgA, IgM and acid phosphatase (ACP), and the morphological changes of spleen tissues were observed. The level of IgA was detected by immunoturbidimetric assay, and the levels of IgG, IgM and ACP were detected by en zyme-linked imm uno sorb ent assay (ELISA). Results: Compared with the 1-time exhaustive group, swimming time of rats in the 4-time exhaustive group was significantly proIonged (P<0.01), and swimming time of rats in the 7-time exhaustive group was significantly shortened (P<0.01). Compared with the 7-time exhaustive group, exhaustive swimming time of rats in the 7-time moxibustion group was significantly proIonged (P<0.01). Compared with the blank group, the IgG level in the 1-time exhaustive group was significantly decreased (PvO.Ol), and the levels of IgG, IgA and IgM in the 4-time exhaustive group and the 7-time exhaustive group were all sign ifica ntly decreased (P<0.05 or PvO.Ol), while the ACP level was in creased sign ifica ntly (both P<0.01). Microscopically, the number of splenic corpuscles in the 1-time exhaustive group was reduced;the center of some splenic corpuscles in the 4-time exhaustive group was damaged;the number of splenic corpuscles in the 7-time exhaustive group was reduced, and there was no obvious germinal center. Compared with the 4-time exhaustive group, the IgA level in the 4-time moxibusti on group was sign ifica ntly in creased (P<0.01), and the ACP level was sign ifica ntly decreased (P<0.01). Compared with the 7-time exhaustive group, the levels of IgG, IgA and IgM in the 7-time moxibustion group were sign ifica ntly in creased (all PvO.Ol), and the ACP level was sign ifica ntly decreased (P<0.01). Microscopically, the nu mber of splenic corpuscles in the 1-time moxibustion group was reduced;the center of some splenic corpuscles in the 4-time moxibustion group was damaged together with hyperplasia of some splenic corpuscles;blast cells were proliferated in the center of some splenic corpuscles in the 7-time moxibustion group. Conclusion: Moxibustion at Shenque (CV 8) can improve the levels of IgG, IgA and IgM, reduce the ACP level, repair damaged spleen tissues, and enhance the immunity of the body to some extent in the Iong-term fatigue rats.
文摘Objective:To observe the effects of moxibustion at Shenshu(BL 23),Zusanli(ST 36)and Shenque(CV 8)on the energy metabolism and endocrine metabolism indicators of rats undergoing one-time exhaustive swimming,and to explore the differences between moxibustion at different points in the effects on anti-exercise fatigue.Methods:Forty-eight male SPF rats were randomly divided into a blank group,a model group,a non-meridian and non-acupoint group,a Shenshu(BL 23)group,a Zusanli(ST 36)group,and a Shenque(CV 8)group using random number table method,with eight rats in each group.Except for the blank group,rats in the other groups were subjected to replicating the one-time exhaustive model using the weight-bearing swimming experiment.Except for the model group,the other model rats received mild moxibustion immediately after swimming.Rats in the non-meridian and non-acupoint group received mild moxibustion at bilateral subcostal non-meridian and non-acupoint points,those in the Shenshu(BL 23)group received mild moxibustion at bilateral Shenshu(BL 23),those in the Zusanli(ST 36)group received mild moxibustion at bilateral Zusanli(ST 36),and those in the Shenque(CV 8)group received mild moxibustion at Shenque(CV 8)for 15 min.Four hours after the exhaustive swimming,femoral artery blood was collected to detect blood lactate(BLA),lactate dehydrogenase(LDH),creatine kinase(CK),creatinine(CRE),blood urea nitrogen(BUN),cortisol(C)and testosterone(T)levels,and calculate the T/C ratio.Results:Compared with the blank group,rat's serum levels of BLA,LDH,CK,BUN and C in the model group and the non-meridian and non-acupoint group were increased,and serum levels of CRE and T,and T/C ratios were decreased(P<0.01 or P<0.05);compared with the model group and the non-meridian and non-acupoint group,the serum levels of BLA,LDH,CK,BUN and C in the Shenshu(BL 23)group,Zusanli(ST 36)group and Shenque(CV 8)group were decreased,and the serum CRE and T levels,and the T/C ratios were increased(all P<0.01);compared with the Shenshu(BL 23)group,the serum CK level was decreased in the Shenque(CV 8)group(P<0.01),the serum levels of T and C were decreased in the Zusanli(ST 36)group and Shenque(CV 8)group(P<0.01 or P<0.05),and the T/C ratio was increased in the Shenque(CV 8)group(P<0.01);compared with the Zusanli(ST 36)group,the serum CK and BUN levels were decreased(P<0.01,P<0.05),and the T/C ratio was increased in the Shenque(CV 8)group(P<0.05).Conclusion:Moxibustion at Shenshu(BL 23),Zusanli(ST 36)and Shenque(CV 8)shows different anti-fatigue effects by regulating the energy metabolism and endocrine metabolism in rats undergoing one-time exhaustive swimming.Moxibustion at Shenshu(BL 23)is better in promoting energy synthesis.Moxibustion at Shenque(CV 8)is more effective in regulating synthesis and decomposition of the skeletal muscle proteins.
基金supported by grants from the National Natural Science Foundation of China (Grant No. 32270955)the Jiangsu Provincial Medical Key Discipline (Grant No. YXZDXK202236)+1 种基金the Key Project of Jiangsu Provincial Health Commission (Grant No. K2023069)the Science and Technology Support Plan (Social Development) Project of Changzhou (Grant No. CE20235058)。
文摘In exploring persistent infections and malignancies, a distinctive subgroup of CD8^(+) T cells, progenitor exhausted CD8^(+) T(Tpex) cells, has been identified. These Tpex cells are notable for their remarkable self-renewal and rapid proliferation abilities. Recent strides in immunotherapy have demonstrated that Tpex cells expand and differentiate into responsive exhausted CD8^(+) T cells, thus underscoring their critical role in the immunotherapeutic retort. Clinical examinations have further clarified a robust positive correlation between the proportional abundance of Tpex cells and enhanced clinical prognosis. Tpex cells have found noteworthy applications in the formulation of inventive immunotherapeutic approaches against tumors. This review describes the functions of Tpex cells in the tumor milieu, particularly their potential utility in tumor immunotherapy. Precisely directing Tpex cells may be essential to achieving successful outcomes in immunotherapy against tumors.
文摘This paper explores the smoke flow characteristics in tunnel fires,giving a particular emphasis on the effects of different distances between the smoke outlets and the fire source.It examines the smoke behavior under different conditions,including variations in heat release rates,exhaust volumetric flow rates,spacing between smoke outlets,and the longitudinal fire source positions.Results indicate that altering the fire source positions and the smoke outlets in the tunnel leads to variations in the properties of smoke flow both the fire source upstream and downstream;the distance between fire source and smoke outlet increases gradually,airflow rate decreases initially and eventually reaches a stable state.Similarly,smoke mass flow rate exhibits an increasing trend that eventually reaches a stable state.Moreover,the heat exchange between the tunnel walls and hot smoke increases as the smoke outlet moves further away from the fire source.This interaction leads to a reduction in the heat exhaust coefficient and a decrease in the distance the smoke spreads.This study investigates the impact of altering the relative longitudinal fire source positions and smoke outlet on smoke flow characteristics by numerical simulation.A theoretical analytical method is used to give a predictive model for the heat exhaust coefficient and the smoke spreading distance.This research can support the theory and technical process of tunnel smoke exhaust prevention and control.
基金supported by the National Innovation and Entrepreneurship Training Program for College Students(202310268058)Exploration of the Mechanism on Therapeutic Efficacy of Gulong Capsules in Treatment of Osteoarthritis from the Perspective of Multi-omics(E4-H23066).
文摘Co-inhibitory receptors serve as crucial regulators of T-cell function,playing a pivotal role in modulating the delicate balance between immune tolerance and autoimmunity.Initially identified in autoimmune disease models,co-inhibitory receptors,including CTLA-4,PD-1,TIM-3,and TIGIT,were found to be integral to immune regulation.Their blockade or absence in these models resulted in the induction or exacerbation of autoimmune diseases.Additionally,scholars have observed that co-inhibitory receptors on lymphocytes hold the potential to influence the prognosis in the context of chronic inflammation.Consequently,the blocking of co-suppressor receptors has emerged as a novel therapeutic approach for inhibiting refractory inflammatory diseases,particularly rheumatoid arthritis.From the standpoint of traditional Chinese medicine(TCM),the treatment of rheumatoid arthritis based on the“strengthening body resistance(FúZhèng)”theory can be construed as the regulation of co-suppressor receptors to modulate the body’s immune function in combating chronic inflammation.This article provides a succinct overview of the role of co-suppressor receptors in anti-inflammatory processes and explores the research prospects of co-suppressor receptor intervention in the treatment of rheumatoid arthritis.The exploration integrates the“strengthening body resistance(FúZhèng)”theory with relevant Chinese medicine formulations.
文摘Experiments were conducted in this study to examine the thermal performance of a thermosyphon,made from Inconel alloy 625,could recover waste heat from automobile exhaust using a limited amount of fluid.The thermosyphon has an outer diameter of 27 mm,a thickness of 2.6 mm,and an overall length of 483 mm.The study involved directing exhaust gas onto the evaporator.This length includes a 180-mm evaporator,a 70-mm adiabatic section,a 223-mm condenser,and a 97-mm finned exchanger.The study examined the thermal performance of the thermosyphon under exhaust flow rates ranging from 0–10 g/sec and temperatures varying from 300℃–900℃.The influence of three parameters—inclination angle(5°–45°),water mass(2–5.3 g),and the quantity of non-condensable gas Argon(0–0.6 g)—was investigated to assess their impacts on the thermosyphon’s thermal efficiency.The experimental findings revealed that with 3 g of water and 0.0564 g of argon in the thermosyphon,the condenser reached its highest temperature at around 200℃.The ideal fuel loading rate for the thermosyphon falls between 0.2 and 0.7 g/s.Moreover,as inclination angles rise,outer wall temperatures of the thermosyphon increase.This is attributed to the explicit expansion of the effective heating area within the evaporation section,coupled with an amplified gravitational component of the water flux.Additionally,an upsurge in the quantity of non-condensable gas(NCG)can mitigate temperature gradients on the outer wall,resulting in a decline in the thermosyphon’s performance.The insulation applied to the adiabatic section demonstrated efficacy in augmenting temperature gradients on the outer wall,thereby improving the overall performance of the thermosyphon.As the water charge within the thermosyphon increases,there is a corresponding rise in heat transfer rates both from the exhaust to the thermosyphon and from the thermosyphon to the fuel.
文摘The centralized smoke exhaust system of shield tunnel is an important determinant for tunnel fire safety,and the use of different design parameters of the tunnel smoke exhaust system will affect the smoke exhaust effect in the tunnel,and the influence of different design parameters on the smoke exhaust effect and temperature attenuation of the tunnel can help engineers in designing a more effective centralized smoke exhaust system for the tunnel.In this paper,the Fire Dynamic Simulator(FDS)is utilized to examine smoke exhaust vent settings for a centralized exhaust system in shield tunnel with both flat and sloped conditions,including slopes of+4.5%and−4.5%,under a 30MWfire power with a 150m^(3)/s smoke exhaust rate.The results suggest that maintaining a vent spacing of 60m and a vent size of 4.0 m×1.5 m is a reasonable configuration for centralized smoke exhaust systems in both flat and slope shield tunnels.This choice helpsminimize construction costs and prevent excessive smoke accumulation.It also promotes favorable conditions for maintaining temperature distribution at 2-m height,visibility,smoke spread distance,and temperature below the ceiling,all below the threshold values,while ensuring high smoke extraction efficiency.However,in the slope section,the chimney effect can disrupt exhaust efficiency,visibility,ceiling temperature,and temperature distribution at a height of 2 m.Employing different opening methods,such as having 2 vents up and 4 vents down in a+4.5%slope and 4 vents up and 2 vents down in a−4.5%slope,can help mitigate these effects.Furthermore,the temperature decay formula for shield tunnels follows a bi-exponential decay pattern,and different design parameters of centralized smoke exhaust systems have minimal effects on temperature decay in shield tunnels.
基金partially supported by the National Natural Science Foundation of China (31702248, 31402176, 31372419 and 31522057)the National Science Foundation for Postdoctoral Scientists of China (Grant No. 20163M590701)+2 种基金the National Program on Key Research Project of China (2016YFD0500400)the Fundamental Research Funds for the Central Universities (2662016QD036, to MZ) the Ministry of Agriculture of China (special fund for Agro-scientific research in the Public Interest, 201303042)
文摘Rabies is one of the most dangerous and widespread zoonosis and is characterized by severe neurological signs and a high case-mortality rate of nearly 100%. Vaccination is the most effective way to prevent rabies in humans and animals. In this study, the relationship between exhaustive exercise and the humoral immune response after immunization with inactivated rabies vaccine was investigated in a mouse model with one-time exhaustive exercise. It was found that compared with the mice with no exercise after vaccination, no significant differences were found in those with exhaustive exercise after vaccination on body-weight changes, virus-neutralizing antibody(VNA) titers, antibody subtypes and survivor ratio after lethal rabies virus(RABV) challenge. This study indicated that exhaustive exercise does not reduce the effects of the rabies inactivated vaccine.
文摘With the rapid development of DNA technologies, high throughput genomic data have become a powerful leverage to locate desirable genetic loci associated with traits of importance in various crop species. However, current genetic association mapping analyses are focused on identifying individual QTLs. This study aimed to identify a set of QTLs or genetic markers, which can capture genetic variability for marker-assisted selection. Selecting a set with k loci that can maximize genetic variation out of high throughput genomic data is a challenging issue. In this study, we proposed an adaptive sequential replacement (ASR) method, which is considered a variant of the sequential replacement (SR) method. Through Monte Carlo simulation and comparing with four other selection methods: exhaustive, SR method, forward, and backward methods we found that the ASR method sustains consistent and repeatable results comparable to the exhaustive method with much reduced computational intensity.
基金jointly supported by the National Natural Science Foundation of China(Grant Nos.81972735,82030079,and 81972656)Beijing Natural Science Foundation(Grant No.7212108)+2 种基金Michigan Medicine and PKU-HSC JI(Grant No.BMU2020JI005)Baidu Foundation(Grant No.2020BD015)Ying Shi Foundation。
文摘Objective:Liver cancer is a deadly malignancy associated with high mortality and morbidity.Less than 20%of patients with advanced liver cancer respond to a single anti-PD-1 treatment.The high heterogeneity of neutrophils in the tumor immune microenvironment in liver cancer may contribute to resistance to immune checkpoint blockade(ICB).However,the underlying mechanism remains largely unknown.Methods:We established an orthotopic liver cancer model by using transposable elements to integrate the oncogenes Myc and KrasG12Dinto the genome in liver cells from conditional Trp53 null/null mice(pTMK/Trp53^(-/-)).Flow cytometry and immunohistochemistry were used to assess the changes in immune cells in the tumor microenvironment.An ex vivo coculture assay was performed to test the inhibitory effects of tumor-associated neutrophils(TANs)on CD8^(+)T cells.The roles of neutrophils,T cells,and NK cells were validated through antibody-mediated depletion.The efficacy of the combination of neutrophil depletion and ICB was evaluated.Results:Orthotropic pTMK/Trp53^(-/-)mouse liver tumors displayed a moderate response to anti-Ly6G treatment but not PD-1 blockade.Depletion of neutrophils increased the infiltration of CD8^(+)T cells and decreased the number of exhausted T cells in the tumor microenvironment.Furthermore,depletion of either CD8^(+)T or NK cells abrogated the antitumor efficacy of anti-Ly6G treatment.Moreover,the combination of anti-Ly6G with anti-PD-L1 enhanced the infiltration of cytotoxic CD8^(+)T cells and thereafter resulted in a significantly greater decrease in tumor burden.Conclusions:Our data suggest that TANs may contribute to the resistance of liver cancer to ICB,and combining TAN depletion with T cell immunotherapy synergistically increases antitumor efficacy.
