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Human umbilical cord mesenchymal stem cell-derived exosomes loaded into a composite conduit promote functional recovery after peripheral nerve injury in rats 被引量:1
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作者 Haoshuai Tang Junjin Li +6 位作者 Hongda Wang Jie Ren Han Ding Jun Shang Min Wang Zhijian Wei Shiqing Feng 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第4期900-907,共8页
Complete transverse injury of peripheral nerves is challenging to treat.Exosomes secreted by human umbilical cord mesenchymal stem cells are considered to play an important role in intercellular communication and regu... Complete transverse injury of peripheral nerves is challenging to treat.Exosomes secreted by human umbilical cord mesenchymal stem cells are considered to play an important role in intercellular communication and regulate tissue regeneration.In previous studies,a collagen/hyaluronic acid sponge was shown to provide a suitable regeneration environment for Schwann cell proliferation and to promote axonal regeneration.This three-dimensional(3D)composite conduit contains a collagen/hyaluronic acid inner sponge enclosed in an electrospun hollow poly(lactic-co-glycolic acid)tube.However,whether there is a synergy between the 3D composite conduit and exosomes in the repair of peripheral nerve injury remains unknown.In this study,we tested a comprehensive strategy for repairing long-gap(10 mm)peripheral nerve injury that combined the 3D composite conduit with human umbilical cord mesenchymal stem cell-derived exosomes.Repair effectiveness was evaluated by sciatic functional index,sciatic nerve compound muscle action potential recording,recovery of muscle mass,measuring the cross-sectional area of the muscle fiber,Masson trichrome staining,and transmission electron microscopy of the regenerated nerve in rats.The results showed that transplantation of the 3D composite conduit loaded with human umbilical cord mesenchymal stem cell-derived exosomes promoted peripheral nerve regeneration and restoration of motor function,similar to autograft transplantation.More CD31-positive endothelial cells were observed in the regenerated nerve after transplantation of the loaded conduit than after transplantation of the conduit without exosomes,which may have contributed to the observed increase in axon regeneration and distal nerve reconnection.Therefore,the use of a 3D composite conduit loaded with human umbilical cord mesenchymal stem cell-derived exosomes represents a promising cell-free therapeutic option for the treatment of peripheral nerve injury. 展开更多
关键词 axon growth collagen EXOSOME human umbilical cord mesenchymal stem cells hyaluronic acid muscular atrophy nerve guidance conduits peripheral nerve regeneration
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Osteotomy combined with anterior cruciate ligament reconstruction for anterior cruciate ligament injury and biplanar deformity
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作者 Fu-Yuan Deng Jun-Cai Liu Zhong Li 《World Journal of Clinical Cases》 SCIE 2024年第22期4897-4904,共8页
BACKGROUND It has been confirmed that the increased posterior tibial slope over 12 degrees is a risk factor for anterior cruciate ligament injury,and varus deformity can aggravate the progression of medial osteoarthri... BACKGROUND It has been confirmed that the increased posterior tibial slope over 12 degrees is a risk factor for anterior cruciate ligament injury,and varus deformity can aggravate the progression of medial osteoarthritis.AIM To evaluate the efficacy of modified high tibial osteotomy(HTO)and anterior cruciate ligament reconstruction(ACLR)in the treatment of anterior cruciate ligament(ACL)injuries with varus deformities and increased posterior tibial slope(PTS)based on clinical and imaging data.METHODS The patient data in this retrospective study were collected from 2019 to 2021.A total of 6 patients were diagnosed with ACL injury combined with varus deformities and increased PTS.All patients underwent modified open wedge HTO and ACLR.The degree of correction of varus deformity and the PTS was evaluated by radiography and magnetic resonance imaging.RESULTS All 6 patients(6 knee joints)were followed up for an average of 20.8±3.7 months.The average age at surgery was 29.5±3.8 years.At the last follow-up,all patients resumed competitive sports.The International Knee Documentation Committee score increased from 50.3±3.1 to 87.0±2.8,the Lysholm score increased from 43.8±4.9 to 86±3.1,and the Tegner activity level increased from 2.2±0.7 to 7.0±0.6.The average movement distance of the tibia anterior translation was 4.8±1.1 mm,medial proximal tibial angle(MPTA)was 88.9±1.3°at the last follow-up,and the PTS was 8.4±1.4°,both of which were significantly higher than those before surgery(P<0.05).CONCLUSION Modified open wedge HTO combined with ACLR can effectively treat patients with ACL ruptures with an associated increased PTS and varus deformity.The short-term effect is significant,but the long-term effect requires further follow-up. 展开更多
关键词 Anterior cruciate ligament reconstruction Varus deformity High tibial osteotomy Posterior tibial slope Biplanar deformity
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Go to the back before going forward:Addressing psychological responses in anterior cruciate ligament reconstruction rehabilitation
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作者 Terese L.Chmielewski Adam Meierbachtol +3 位作者 Rick Aberman Travis Gunderson Jonathon Sikorski Kathleen Cummer 《Journal of Sport and Health Science》 SCIE CAS CSCD 2024年第5期666-669,共4页
Helping athletes return to sports participation is a primary goal of anterior cruciate ligament(ACL)reconstruction rehabilitation.To facilitate the achievement of this goal,decades of research studies have sought to i... Helping athletes return to sports participation is a primary goal of anterior cruciate ligament(ACL)reconstruction rehabilitation.To facilitate the achievement of this goal,decades of research studies have sought to identify knee impairments that reduce knee function as well as interventions to resolve them.1Yet,over the past 10 years,research pertaining to psychological responses(i.e.,cognitions and emotions)after ACL reconstruction has grown exponentially—a phenomenon that can be visualized by entering the search terms"psychological"and"anterior cruciate ligament reconstruction"into the PubMed search engine. 展开更多
关键词 LIGAMENT RETURN PSYCHOLOGICAL
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Efficacy of graphene nanocomposites for air disinfection in dental clinics: A randomized controlled study
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作者 Ya-Qiong Ju Xiang-Hua Yu +3 位作者 Jing Wu Ying-Hui Hu Xiang-Yong Han Dan Fang 《World Journal of Clinical Cases》 SCIE 2024年第28期6173-6179,共7页
BACKGROUND Aerosols containing disease-causing microorganisms are produced during oral diagnosis and treatment can cause secondary contamination.AIM To investigate the use of graphene material for air disinfection in ... BACKGROUND Aerosols containing disease-causing microorganisms are produced during oral diagnosis and treatment can cause secondary contamination.AIM To investigate the use of graphene material for air disinfection in dental clinics by leveraging its adsorption and antibacterial properties.METHODS Patients who received ultrasonic cleaning at our hospital from April 2023 to April 2024.They were randomly assigned to three groups(n=20 each):Graphene nanocomposite material suction group(Group A),ordinary filter suction group(Group B),and no air suction device group(Group C).The air quality and air colony count in the clinic rooms were assessed before,during,and after the procedure.Additionally,bacterial colony counts were obtained from the air outlets of the suction devices and the filter screens in Groups A and B.RESULTS Before ultrasonic cleaning,no significant differences in air quality PM2.5 and colony counts were observed among the three groups.However,significant differences in air quality PM2.5 and colony counts were noted among the three groups during ultrasonic cleaning and after ultrasonic treatment.Additionally,the number of colonies on the exhaust port of the suction device and the surface of the filter were significantly lower in Group A than in Group B(P=0.000 and P=0.000,respectively).CONCLUSION Graphene nanocomposites can effectively sterilize the air in dental clinics by exerting their antimicrobial effects and may be used to reduce secondary pollution. 展开更多
关键词 GRAPHENE NANOCOMPOSITES Oral clinic Air disinfection Secondary contamination
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Argatroban promotes recovery of spinal cord injury by inhibiting the PAR1/JAK2/STAT3 signaling pathway
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作者 Chenxi Zhao Tiangang Zhou +9 位作者 Ming Li Jie Liu Xiaoqing Zhao Yilin Pang Xinjie Liu Jiawei Zhang Lei Ma Wenxiang Li Xue Yao Shiqing Feng 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第2期434-439,共6页
Argatroban is a synthetic thrombin inhibitor approved by U.S.Food and Drug Administration for the treatment of thrombosis.However,whether it plays a role in the repair of spinal cord injury is unknown.In this study,we... Argatroban is a synthetic thrombin inhibitor approved by U.S.Food and Drug Administration for the treatment of thrombosis.However,whether it plays a role in the repair of spinal cord injury is unknown.In this study,we established a rat model of T10 moderate spinal cord injury using an NYU Impactor ModerⅢand performed intraperitoneal injection of argatroban for 3 consecutive days.Our results showed that argatroban effectively promoted neurological function recovery after spinal cord injury and decreased thrombin expression and activity in the local injured spinal cord.RNA sequencing transcriptomic analysis revealed that the differentially expressed genes in the argatroban-treated group were enriched in the JAK2/STAT3 pathway,which is involved in astrogliosis and glial scar formation.Western blotting and immunofluorescence results showed that argatroban downregulated the expression of the thrombin receptor PAR1 in the injured spinal cord and the JAK2/STAT3 signal pathway.Argatroban also inhibited the activation and proliferation of astrocytes and reduced glial scar formation in the spinal cord.Taken together,these findings suggest that argatroban may inhibit astrogliosis by inhibiting the thrombin-mediated PAR1/JAK2/STAT3 signal pathway,thereby promoting the recovery of neurological function after spinal cord injury. 展开更多
关键词 ARGATROBAN ASTROGLIOSIS JAK/STAT signaling pathway protease-activated receptor-1 spinal cord injury THROMBIN vimentin
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The ferroptosis activity is associated with neurological recovery following chronic compressive spinal cord injury 被引量:1
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作者 Zhengran Yu Xing Cheng +2 位作者 Wenxu Pan Cheng Yu Yang Duan 《Neural Regeneration Research》 SCIE CAS CSCD 2023年第11期2482-2488,共7页
Chronic compressive spinal cord injury in compressive cervical myelopathy conditions can lead to rapid neurological deterioration in the early phase,followed by partial self-recovery,and ultimately an equilibrium stat... Chronic compressive spinal cord injury in compressive cervical myelopathy conditions can lead to rapid neurological deterioration in the early phase,followed by partial self-recovery,and ultimately an equilibrium state of neurological dysfunction.Ferroptosis is a crucial pathological process in many neurodegenerative diseases;however,its role in chro nic compressive spinal cord injury remains unclear.In this study,we established a chronic compressive spinal cord injury rat model,which displayed its most severe behavioral and electrophysiological dysfunction at 4 wee ks and partial recovery at 8 weeks after compression.Bulk RNA sequencing data identified enriched functional pathways,including ferroptosis,presynapse,and postsynaptic membrane activity at both 4 and 8 wee ks following chro nic compressive spinal co rd injury.Tra nsmission electron microscopy and malondialdehyde quantification assay confirmed that ferroptosis activity peaked at 4 weeks and was attenuated at 8 weeks after chronic compression.Ferro ptosis activity was negatively correlated with behavioral score.Immunofluorescence,quantitative polymerase chain reaction,and western blotting showed that expression of the anti-ferroptosis molecules,glutathione peroxidase 4(GPX4) and MAF BZIP transcription factor G(MafG),in neuro ns was suppressed at 4 weeks and upregulated at 8 weeks following spinal co rd compression.There was a positive correlation between the expression of these two molecules,suggesting that they may work together to contribute to functional recovery following chronic compressive spinal cord injury.In conclusion,our study determined the genome-wide expression profile and fe rroptosis activity of a consistently compressed spinal cord at different time points.The results showed that anti-fe rroptosis genes,specifically GPX4 and MafG,may be involved in spontaneous neurological recovery at 8 weeks of chronic compressive spinal cord injury.These findings contribute to a better understanding of the mechanisms underlying chronic compressive spinal cord injury and may help identify new therapeutic targets for compressive cervical myelopathy. 展开更多
关键词 chronic spinal cord compression compressive cervical myelopathy ferroptosis genome-wide transcriptome glutathione peroxidase 4(GPX4) MAF BZIP transcription factor G(MafG) neurological function
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Exercise combined with administration of adipose-derived stem cells ameliorates neuropathic pain after spinal cord injury 被引量:1
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作者 Xing Cheng Gu-Ping Mao +9 位作者 Wen-Jie Hu Zheng-Ran Yu Yi-Yang Xu Wei Chen Xiang Li Xiao-Lin Zeng Wen-Wu Zhang Jie-Wen Chen Yong Wan Le Wang 《Neural Regeneration Research》 SCIE CAS CSCD 2023年第8期1841-1846,共6页
Experimental studies have shown that exercise and human adipose-derived stem cells(ADSCs)play positive roles in spinal cord injury(SCI).However,whether ADSCs and/or exercise have a positive effect on SCI-induced neuro... Experimental studies have shown that exercise and human adipose-derived stem cells(ADSCs)play positive roles in spinal cord injury(SCI).However,whether ADSCs and/or exercise have a positive effect on SCI-induced neuropathic pain is still unclear.Thus,there is a need to explore the effects of exercise combined with administration of ADSCs on neuropathic pain after SCI.In this study,a thoracic 11(T11)SCI contusion model was established in adult C57BL/6 mice.Exercise was initiated from 7 days post-injury and continued to 28 days post-injury,and approximately 1×105 ADSCs were transplanted into the T11 spinal cord lesion site immediately after SCI.Motor function and neuropathic pain-related behaviors were assessed weekly using the Basso Mouse Scale,von Frey filament test,Hargreaves method,and cold plate test.Histological studies(Eriochrome cyanine staining and immunohistochemistry)were performed at the end of the experiment(28 days post-injury).Exercise combined with administration of ADSCs partially improved early motor function(7,14,and 21 days postinjury),mechanical allodynia,mechanical hypoalgesia,thermal hyperalgesia,and thermal hypoalgesia.Administration of ADSCs reduced white and gray matter loss at the lesion site.In addition,fewer microglia and astrocytes(as identified by expression of ionized calcium-binding adapter molecule 1 and glial fibrillary acidic protein,respectively)were present in the lumbar dorsal horn in the SCI+ADSCs and SCI+exercise+ADSCs groups compared with the sham group.Our findings suggest that exercise combined with administration of ADSCs is beneficial for the early recovery of motor function and could partially ameliorate SCIinduced neuropathic pain. 展开更多
关键词 adipose-derived stem cells ALLODYNIA EXERCISE glial fibrillary acidic protein HYPERALGESIA hypoalgesia ionized calcium-binding adapter molecule 1 motor function spinal cord injury
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The Outcome of Posterior Spinal Fusion and Instrumentation of Adolescent Idiopathic Scoliosis without Wound Suction Drainage 被引量:1
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作者 Ebrahim Ghayem Hassankhani Golnaz Ghayyem Hassankhani Solmaz Ghayyem Hassankhani Pharmsist 《Open Journal of Orthopedics》 2023年第1期23-30,共8页
Background: In spine surgery postoperative closed suction drainage is used to decrease the potential risks of wound hematoma formation, and reduces the risk of infection, cord compression and neurologic deficit. Howev... Background: In spine surgery postoperative closed suction drainage is used to decrease the potential risks of wound hematoma formation, and reduces the risk of infection, cord compression and neurologic deficit. However, the efficacy of drains used for this purpose in adolescent idiopathic scoliosis is controversial. The purpose of this study is to evaluate outcomes of patients after posterior spinal fusion with instrumentation for adolescent idiopathic scoliosis without wound suction drainage. Methods: A total of 66 Patients who underwent posterior spinal fusion and instrumentation for the correction of Adolescent idiopathic scoliosis without the use of drain from January 2012 to January 2021 were included. Wound dehiscence, wound hematoma, infection, preoperative and postoperative hemoglobin levels and need for transfusion were described as frequency and mean values. Results: The average age was 15.06 years. Hospital stay was 2.2 days. Patients were followed-up over 50.21 months. There was no deep infection, wound hematoma. The difference between just postoperative and three days after operation hemoglobin levels was not significant and no need for transfusion. Only 3 (4.5%) cases with superficial skin infection and 4 (6%) cases with skin and Wound dehiscence were treated with dressing and antibiotics with full recovery. Conclusion: Without using drain for patients with idiopathic scoliosis who underwent posterior spinal fusion and instrumentation, no increase in blood loss, transfusion requirements, wound infection, skin dehiscence, and wound hematoma was observed. 展开更多
关键词 Posterior Spinal Fusion Adolescent Idiopathic Scoliosis Wound Suction Drainage
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The role of AFAP1-AS1 in mitotic catastrophe and metastasis of triple-negative breast cancer cells by activating the PLK1 signaling pathway 被引量:2
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作者 SHUIZHONG CEN XIAOJIE PENG +9 位作者 JIANWEN DENG HAIYUN JIN ZHINAN DENG XIAOHUA LIN DI ZHU MING JIN YANWEN ZHU PUSHENG ZHANG YUNFENG LUO HONGYAN HUANG 《Oncology Research》 SCIE 2023年第3期375-388,共14页
Triple-negative breast cancer(TNBC)is characterized by fast growth,high metastasis,high invasion,and a lack of therapeutic targets.Mitosis and metastasis of TNBC cells are two important biological behaviors in TNBC ma... Triple-negative breast cancer(TNBC)is characterized by fast growth,high metastasis,high invasion,and a lack of therapeutic targets.Mitosis and metastasis of TNBC cells are two important biological behaviors in TNBC malignant progression.It is well known that the long noncoding RNA AFAP1-AS1 plays a crucial role in various tumors,but whether AFAP1-AS1 is involved in the mitosis of TNBC cells remains unknown.In this study,we investigated the functional mechanism of AFAP1-AS1 in targeting Polo-like Kinase 1(PLK1)activation and participating in mitosis of TNBC cells.We detected the expression of AFAP1-AS1 in the TNBC patient cohort and primary cells by in situ hybridization(ISH),northern blot,fluorescent in situ hybridization(FISH)and cell nucleus/cytoplasm RNA fraction isolation.High AFAP1-AS1 expression was negatively correlated with overall survival(OS),disease-free survival(DFS),metastasis-free survival(MFS)and recurrence-free survival(RFS)in TNBC patients.We explored the function of AFAP1-AS1 by transwell,apoptosis,immunofluorescence(IF)and patient-derived xenograft(PDX)models in vitro and in vivo.We found that AFAP1-AS1 promoted TNBC primary cell survival by inhibiting mitotic catastrophe and increased TNBC primary cell growth,migration and invasion.Mechanistically,AFAP1-AS1 activated phosphorylation of the mitosis-associated kinase PLK1 protein.Elevated levels of AFAP1-AS1 in TNBC primary cells increased PLK1 pathway downstream gene expression,such as CDC25C,CDK1,BUB1 and TTK.More importantly,AFAP1-AS1 increased lung metastases in a mouse metastasis model.Taken together,AFAP1-AS1 functions as an oncogene that activates the PLK1 signaling pathway.AFAP1-AS1 could be used as a potential prognostic marker and therapeutic target for TNBC. 展开更多
关键词 TNBC AFAP1-AS1 Mitotic catastrophe METASTASIS PLK1
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Knockdown of NADPH oxidase 4 reduces mitochondrial oxidative stress and neuronal pyroptosis following intracerebral hemorrhage 被引量:4
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作者 Bo-Yun Ding Chang-Nan Xie +5 位作者 Jia-Yu Xie Zhuo-Wei Gao Xiao-Wei Fei En-Hui Hong Wen-Jin Chen Yi-Zhao Chen 《Neural Regeneration Research》 SCIE CAS CSCD 2023年第8期1734-1742,共9页
Intracerebral hemorrhage is often accompanied by oxidative stress induced by reactive oxygen species,which causes abnormal mitochondrial function and secondary reactive oxygen species generation.This creates a vicious... Intracerebral hemorrhage is often accompanied by oxidative stress induced by reactive oxygen species,which causes abnormal mitochondrial function and secondary reactive oxygen species generation.This creates a vicious cycle leading to reactive oxygen species accumulation,resulting in progression of the pathological process.Therefore,breaking the cycle to inhibit reactive oxygen species accumulation is critical for reducing neuronal death after intracerebral hemorrhage.Our previous study found that increased expression of nicotinamide adenine dinucleotide phosphate oxidase 4(NADPH oxidase 4,NOX4)led to neuronal apoptosis and damage to the blood-brain barrier after intracerebral hemorrhage.The purpose of this study was to investigate the role of NOX4 in the circle involving the neuronal tolerance to oxidative stress,mitochondrial reactive oxygen species and modes of neuronal death other than apoptosis after intracerebral hemorrhage.We found that NOX4 knockdown by adeno-associated virus(AAV-NOX4)in rats enhanced neuronal tolerance to oxidative stress,enabling them to better resist the oxidative stress caused by intracerebral hemorrhage.Knockdown of NOX4 also reduced the production of reactive oxygen species in the mitochondria,relieved mitochondrial damage,prevented secondary reactive oxygen species accumulation,reduced neuronal pyroptosis and contributed to relieving secondary brain injury after intracerebral hemorrhage in rats.Finally,we used a mitochondria-targeted superoxide dismutase mimetic to explore the relationship between reactive oxygen species and NOX4.The mitochondria-targeted superoxide dismutase mimetic inhibited the expression of NOX4 and neuronal pyroptosis,which is similar to the effect of AAV-NOX4.This indicates that NOX4 is likely to be an important target for inhibiting mitochondrial reactive oxygen species production,and NOX4 inhibitors can be used to alleviate oxidative stress response induced by intracerebral hemorrhage. 展开更多
关键词 caspase 1 caspase4/11 gasdermin D intracerebral hemorrhage mitochondria reactive oxygen species inhibitor NADPH oxidase 4 neuronal pyroptosis neuronal tolerance reactive oxygen species secondary brain injury
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自体骨移植在腰椎后路椎间融合中的临床疗效分析 被引量:5
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作者 王华强 滕勇 CHEN Jianchang 《临床外科杂志》 2016年第5期349-352,共4页
目的探讨腰椎后路手术中应用自体椎板、棘突骨颗粒为植骨材料行椎间融合治疗特殊的腰椎间盘突出症、腰椎管狭窄症及腰椎滑脱症等腰椎退变性疾病的临床效果。方法特殊腰椎间盘突出症、腰椎管狭窄症及腰椎滑脱症并行后路腰椎融合术(PLIF... 目的探讨腰椎后路手术中应用自体椎板、棘突骨颗粒为植骨材料行椎间融合治疗特殊的腰椎间盘突出症、腰椎管狭窄症及腰椎滑脱症等腰椎退变性疾病的临床效果。方法特殊腰椎间盘突出症、腰椎管狭窄症及腰椎滑脱症并行后路腰椎融合术(PLIF和TLIF)患者184例,按椎间融合材料分为3组,A组61例,单纯自体骨组;B组64例,PEEK椎间融合器组;C组59例,异体骨垫组。平均随访18个月(12~60个月)。统计3组患者术前一般资料、手术时间、术中出血量、术后下床时间、住院天数、术后融合率以及术后椎间高度及融合节段角度的变化情况,按JOA评分标准评价功能恢复情况。结果3组患者术前一般资料、术中出血量、手术时间、术后下床时间、住院时间、JOA评分、术后1年椎间隙高度及融合节段角度比较,差异均无统计学意义(P〉0.05);3组患者术后3个月JOA评分较术前均显著提高(P〈0.05)。A组术后1年的融合效果高于C组(P〈0.05);B组术后融合器移位的并发症发生率较高。结论在后路椎间融合中纯自体棘突、椎板骨移植能起到和PEEK融合器和异体骨融合器一样的维持椎间隙高度的作用,不延长术后卧床时间,且具有经济效益。 展开更多
关键词 腰椎 自体骨移植 脊柱融合术
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Expression and significance of VEGF and p53 in rat degenerated intervertebral disc tissues 被引量:5
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作者 Xiao-Wei Liu Jin Kang +1 位作者 Xian-Dong Fan Li-Feng Sun 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2013年第5期404-406,共3页
Objective:To discuss the expression and significance of vascular endothelial growth factor (VEGF) and p53 expression in rat degenerated intervertebral disc(IVD) tissues.Methods:A total of 78 even-aged Sprague-Dawley(S... Objective:To discuss the expression and significance of vascular endothelial growth factor (VEGF) and p53 expression in rat degenerated intervertebral disc(IVD) tissues.Methods:A total of 78 even-aged Sprague-Dawley(SD) rats(observation group) were chosen to establish a rat IVD degeneration model with anterior limbs and tail-removing method.Three months after modeling, rats were executed and degenerated IVD tissues were obtained for pathological biopsy so as to observe VEGF and p53 expression thereof.Meanwhile,IVD tissues from 8 healthy rats were gained for comparison.Results:Capillary infiltration was found in 62.8%of cases in observation group. Positive expression of VEGF and p53 was seen in 74.4%and 59.0%of cases respectively with a co-expression rate of 53.8%.VECF and p53 expression in degenerated IVD tissues with capillary infiltration was higher than that in non-infiltration group(P【0.05).Conclasion:A coordinate expression of VEGF and p53 in rat degenerated IVD tissues is demonstrated,indicating that they are both involved in neovascularization and infiltration,which accelerates IVD degeneration. 展开更多
关键词 INTERVERTEBRAL disc NEOVASCULARIZATION IMMUNOHISTOCHEMISTRY VEGF P53 protein
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External fixation is more suitable for intra-articular fractures of the distal radius in elderly patients 被引量:7
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作者 Chuang Ma Qiang Deng +5 位作者 Hongwei Pu Xinchun Cheng Yuhua Kan Jing Yang Aihemaitijiang Yusufu Li Cao 《Bone Research》 SCIE CAS CSCD 2016年第1期39-47,共9页
The purpose of this study was to compare the functional outcomes, psychological impact, and complication rates associated with external fixation and volar or dorsal plating in relation to the functional parameters fol... The purpose of this study was to compare the functional outcomes, psychological impact, and complication rates associated with external fixation and volar or dorsal plating in relation to the functional parameters following treatment of intra-articular fractures of the distal radius (IFDR) in patients older than 65 years. We hypothesized that using volar or dorsal plating would improve functional outcomes, but that it would be associated with more complications and equivalent functional outcomes when compared with the external fixation group. A total of 123 consecutive patients suffering from IFDR were recruited into the study. The patients were measured for clinical, radiological, and psychosocial functioning outcomes and were followed up after I week and 3, 6 and 12 months. After 3 months, the plating group had better pronation (P = 0.001), supination, (P = 0.047) and extension (P = 0.043) scores. These differences were somewhat attenuated by 6 months and disappeared at I year. The plating group had a greater occurrence of wound infection (P = 0.043), tendonitis, (P = 0.024) and additional surgery compared with the external fixation group. The only TNO-AZL Adult Quality of Life scores in the plating group that were lower than those in the external fixation group were in the "gross motor" category (walking upstairs, bending over, walking 500 yards; P = 0.023). Internal fixation was more advantageous than external fixation in the early rehabilitation period; after I year the outcomes were similar. The plating group showed significantly higher levels of wound infection and tendonitis and had a greater need for additional surgeries. 展开更多
关键词 MORE External fixation is more suitable for intra-articular fractures of the distal radius in elderly patients
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Allograft pretreatment for the repair of sciatic nerve defects: green tea polyphenols versus radiation 被引量:1
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作者 Sheng-hu Zhou Ping Zhen +4 位作者 Shen-song Li Xiao-yan Liang Ming-xuan Gao Qi Tian Xu-sheng Li 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第1期136-140,共5页
Pretreatment of nerve allografts by exposure to irradiation or green tea polyphenols can elimi- nate neuroimmunogenicity, inhibit early immunological rejection, encourage nerve regeneration and functional recovery, im... Pretreatment of nerve allografts by exposure to irradiation or green tea polyphenols can elimi- nate neuroimmunogenicity, inhibit early immunological rejection, encourage nerve regeneration and functional recovery, improve tissue preservation, and minimize postoperative infection. In the present study, we investigate which intervention achieves better results. We produced a 1.0 cm sciatic nerve defect in rats, and divided the rats into four treatment groups: autograft, fresh nerve allograft, green tea polyphenol-pretreated (1 mg/mL, 4~C) nerve allograft, and irradiation-pre- treated nerve allograft (26.39 Gy/min for 12 hours; total 19 kGy). The animals were observed, and sciatic nerve electrophysiology, histology, and transmission electron microscopy were carried out at 6 and 12 weeks after grafting. The circumference and structure of the transplanted nerve in rats that received autografts or green tea polyphenol-pretreated nerve allografts were similar to those of the host sciatic nerve. Compared with the groups that received fresh or irradiation-pre- treated nerve allografts, motor nerve conduction velocity in the autograft and fresh nerve allograft groups was greater, more neurites grew into the aUografts, Schwann cell proliferation was evident, and a large number of new blood vessels was observed; in addition, massive myelinated nerve fibers formed, and abundant microfilaments and microtubules were present in the axoplasm. Our findings indicate that nerve allografts pretreated by green tea polyphenols are equivalent to trans- planting autologous nerves in the repair of sciatic nerve defects, and promote nerve regeneration. Pretreatment using green tea polyphenols is better than pretreatment with irradiation. 展开更多
关键词 nerve regeneration peripheral nerve injury allografi green tea polyphenols IRRADIATION sciatic nerve TRANSPLANTATION nerve defects nerve repair alternative nerual regeneration
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Evidence-based treatment for acute spinal cord injury 被引量:2
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作者 Zhouming Deng Jiajia Su +4 位作者 Lin Cai Ansong Ping Wei Jin Renxiong Wei Yan Zhan 《Neural Regeneration Research》 SCIE CAS CSCD 2011年第23期1791-1795,共5页
OBJECTIVE: To formulate an evidence-based treatment for one patient with acute spinal cord injury and summarize evidence for evaluating acute spinal cord injury treatment. METHODS: Studies related to the treatment f... OBJECTIVE: To formulate an evidence-based treatment for one patient with acute spinal cord injury and summarize evidence for evaluating acute spinal cord injury treatment. METHODS: Studies related to the treatment for acute spinal cord injury were identified via a search of National Guideline Clearinghouse (NGC, 2000 11), the Cochrane Library (Issue 1,2011), TRIP Database (2000 11), and PubMed (1966-2011). Treatment strategies were formulated according to three basic principles: best evidence, doctor's professional experience, and wishes of the patient. RESULTS: A total of 34 articles were selected, including 1 NGC guideline, 22 systematic reviews, and 11 randomized controlled trials. Based on our review, we arrived at the following recommendations: no clinical evidence exists definitively to recommend the use of any of neuroprotective pharmaceuticals; surgery should be undertaken early; mechanical compression devices and low-molecular weight heparin should be employed to prevent thrombosis; respiratory muscle training is beneficial for pulmonary function and quality of life; and functional electrical stimulation and acupuncture can promote functional recovery. The patient accordingly underwent surgery 6 hours after trauma without receiving any neuroprotective pharmaceuticals; low-molecular weight heparin and intermittent pneumatic compression were applied to prevent thrombosis. He also underwent respiratory muscle training daily for 8 weeks and received functional electrical stimulation for 15 minutes and acupuncture for 30 minutes every day. After follow-up for 3 months, the above therapeutic regimen was confirmed efficacious for acute spinal cord injury. CONCLUSION: Evidence-based medicine provides an individualized treatment protocol for acute spinal cord injury, which can significantly improve the therapeutic effect and prognosis. 展开更多
关键词 evidence-based treatment spinal cord injury SURGERY therapeutic effect PROGNOSIS ELECTROACUPUNCTURE
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Three-dimensional visualization of the functional fascicular groups of a long-segment peripheral nerve 被引量:3
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作者 Jian Qi Wei-Ya Wang +7 位作者 Ying-Chun Zhong Jia-Ming Zhou Peng Luo Ping Tang Cai-Feng He Shuang Zhu Xiao-Lin Liu Yi Zhang 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第8期1465-1470,共6页
The three-dimensional(3D) visualization of the functional bundles in the peripheral nerve provides direct and detailed intraneural spatial information. It is useful for selecting suitable surgical methods to repair ... The three-dimensional(3D) visualization of the functional bundles in the peripheral nerve provides direct and detailed intraneural spatial information. It is useful for selecting suitable surgical methods to repair nerve defects and in optimizing the construction of tissue-engineered nerve grafts. However, there remain major technical hurdles in obtaining, registering and interpreting 2D images, as well as in establishing 3D models. Moreover, the 3D models are plagued by poor accuracy and lack of detail and cannot completely reflect the stereoscopic microstructure inside the nerve. To explore and help resolve these key technical problems of 3D reconstruction, in the present study, we designed a novel method based on re-imaging techniques and computer image layer processing technology. A 20-cm ulnar nerve segment from the upper arm of a fresh adult cadaver was used for acetylcholinesterase(ACh E) staining. Then, 2D panoramic images were obtained before and after ACh E staining under the stereomicroscope. Using layer processing techniques in Photoshop, a space transformation method was used to fulfill automatic registration. The contours were outlined, and the 3D rendering of functional fascicular groups in the long-segment ulnar nerve was performed with Amira 4.1 software. The re-imaging technique based on layer processing in Photoshop produced an image that was detailed and accurate. The merging of images was accurate, and the whole procedure was simple and fast. The least square support vector machine was accurate, with an error rate of only 8.25%. The 3D reconstruction directly revealed changes in the fusion of different nerve functional fascicular groups. In conclusion. The technique is fast with satisfactory visual reconstruction. 展开更多
关键词 nerve regeneration peripheral nerve ulnar nerve three-dimensional reconstruction functional fascicular group REGISTRATION segmentation locating spots auto-registration ACETYLCHOLINESTERASE neural regeneration
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Interaction between Schwann cells and other cells during repair of peripheral nerve injury 被引量:10
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作者 Wen-Rui Qu Zhe Zhu +5 位作者 Jun Liu De-Biao Song Heng Tian Bing-Peng Chen Rui Li Ling-Xiao Deng 《Neural Regeneration Research》 SCIE CAS CSCD 2021年第1期93-98,共6页
Peripheral nerve injury(PNI)is common and,unlike damage to the central nervous system injured nerves can effectively regenerate depending on the location and severity of injury.Peripheral myelinating glia,Schwann cell... Peripheral nerve injury(PNI)is common and,unlike damage to the central nervous system injured nerves can effectively regenerate depending on the location and severity of injury.Peripheral myelinating glia,Schwann cells(SCs),interact with various cells in and around the injury site and are important for debris elimination,repair,and nerve regeneration.Following PNI,Wallerian degeneration of the distal stump is rapidly initiated by degeneration of damaged axons followed by morphologic changes in SCs and the recruitment of circulating macrophages.Interaction with fibroblasts from the injured nerve microenvironment also plays a role in nerve repair.The replication and migration of injury-induced dedifferentiated SCs are also important in repairing the nerve.In particular,SC migration stimulates axonal regeneration and subsequent myelination of regenerated nerve fibers.This mobility increases SC interactions with other cells in the nerve and the exogenous environment,which influence SC behavior post-injury.Following PNI,SCs directly and indirectly interact with other SCs,fibroblasts,and macrophages.In addition,the inter-and intracellular mechanisms that underlie morphological and functional changes in SCs following PNI still require further research to explain known phenomena and less understood cell-specific roles in the repair of the injured peripheral nerve.This review provides a basic assessment of SC function post-PNI,as well as a more comprehensive evaluation of the literature concerning the SC interactions with macrophages and fibroblasts that can influence SC behavior and,ultimately,repair of the injured nerve. 展开更多
关键词 axon regeneration cell-cell interactions nerve injury nerve repair peripheral nerve recovery REGENERATION REPAIR Schwann cell migration
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Exertional heat illness risk factors and physiological responses of youth football players 被引量:2
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作者 Susan W.Yeargin John J.Dickinson +3 位作者 Dawn M.Emerson Jessica Koller Toni M.Torres-McGehee Zachary Y.Kerr 《Journal of Sport and Health Science》 SCIE 2021年第1期91-98,共8页
Objective:To determine which intrinsic and extrinsic exertional heat illness(EHI)risk factors exist in youth American football players and observe perceptual and physiological responses of players during events(games ... Objective:To determine which intrinsic and extrinsic exertional heat illness(EHI)risk factors exist in youth American football players and observe perceptual and physiological responses of players during events(games and practices).Methods:Cross-sectional cohort study observing 63 youth football players,varying in position.Independent variables were league(weightrestricted(WR,n=27)and age-restricted(AR,n=36))and event type.Dependent variables were anthropometrics,work-to-rest ratio,and wet bulb globe temperature.Descriptive variables included preparticipation examination and uniform configuration.A subset of 16 players participated in physiological variables(heart rate and gastrointestinal temperature).Data collection occurred on 7 AR and 8 WR nonconsecutive practices and the first 3 games of the season.Results:Mean values for anthropometric variables were higher(p<0.05)in the AR league than the WR league.Work time(χ^2(1,111)=4.232;p=0.039)and rest time(χ^2(1,111)=43.41;p<0.001)were significantly greater for games,but ratios were significantly higher for practices(χ^2(1,111)=40.62;p<0.001).The majority of events(77%)observed were in black and red flag wet bulb globe temperature risk categories.A total of 57%of the players had a preparticipation examination,and up to 82%of events observed were in full uniforms.Individual gastrointestinal temperature and heart rate responses ranged widely and no players reached critical thresholds.Conclusion:Extrinsic(disproportionate work ratios,environmental conditions)and intrinsic(higher body mass index)EHI risk factors exist in youth football.Certain risk factors may be influenced by event and league type.National youth football organizations need to create thorough guidelines that address EHI risk factors for local leagues to adopt. 展开更多
关键词 Adolescents ANTHROPOMETRICS Core temperature Heat exchange PEDIATRIC Wet bulb globe temperature
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Kunming mouse strain is less susceptible to elastase-induced abdominal aortic aneurysms 被引量:2
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作者 Haole Liu Kangli Tian +11 位作者 Congcong Xia Panpan Wei Boyu Xu Weilai Fu Yankui Li Yafeng Li Liang Bai Rong Wang Weirong Wang Baohui Xu Enqi Liu Sihai Zhao 《Animal Models and Experimental Medicine》 CSCD 2022年第1期72-80,共9页
Background:Porcine pancreatic elastase(PPE)is successfully used to induce abdominal aortic aneurysm(AAA)in mice.However,differences between mouse strains in susceptibility to PPE induction have been reported.Kunming m... Background:Porcine pancreatic elastase(PPE)is successfully used to induce abdominal aortic aneurysm(AAA)in mice.However,differences between mouse strains in susceptibility to PPE induction have been reported.Kunming mouse is one of the most frequently used strains in China but whether it is suitable for induction of AAA by PPE application remains unclear.Methods:PPE infusion(1.5 units/ml)in temporary controlled aorta was performed to induce AAAs in both C57BL/6J and Kunming mice.Phosphatebuffered saline(PBS)application was used as vehicle control.The aorta diameters of all mice were measured at days 0 and 14 after surgery to evaluate the AAA formation.Results:After 14 days of PPE or PBS infusion,all mice were sacrificed and aorta tissues were collected for histological staining analysis.At the 14th day after infusion,PPE successfully induced aortic dilation in Kunming mice and typical AAA in C57BL/6J mice.The aorta diameter increased by 0.23 mm in Kunming mice after PPE infusion,while it was 0.72 mm in the C57BL/6J strain.PPE induced mild elastin degradation,smooth muscle cell(SMC)depletion and mural leucocyte infiltration in Kunming mice,but in PPE-sensitive C57BL/6J mice,it induced total loss of SMCs,elastin disappearance and diffused infiltrated leucocytes in aortic aneurysmal segments.The effects of PPE in inducing angiogenesis and upregulating matrix metalloproteinase 2 and 9 expression in Kunming mice were also weaker than that in C57BL/6J mice.Conclusion:At the reported dose of PPE,Kunming mouse is not as susceptible to AAA formation as C57BL/6J mice.The failure of PPE to induce AAA formation in Kunming mice may be associated to its inability to boost a strong inflammatory response. 展开更多
关键词 abdominal aortic aneurysms C57BL/6J HISTOLOGY Kunming STRAIN
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Impaired motor control after sport-related concussion could increase risk for musculoskeletal injury:Implications for clinical management and rehabilitation 被引量:2
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作者 Terese L.Chmielewski Justin Tatman +5 位作者 Shuhei Suzuki MaryBeth Horodyski Darcy S.Reisman Russell M.Bauer James R.Clugston Daniel C.Herman 《Journal of Sport and Health Science》 SCIE 2021年第2期154-161,共8页
This review presents a conceptual framework and supporting evidence that links impaired motor control after sport-related concussion(SRC)to increased risk for musculoskeletal injury.Multiple studies have found that at... This review presents a conceptual framework and supporting evidence that links impaired motor control after sport-related concussion(SRC)to increased risk for musculoskeletal injury.Multiple studies have found that athletes who are post-SRC have higher risk for musculoskeletal injury compared to their counterparts.A small body of research suggests that impairments in motor control are associated with musculoskeletal injury risk.Motor control involves the perception and processing of sensory information and subsequent coordination of motor output within the central nervous system to perform a motor task.Motor control is inclusive of motor planning and motor learning.If sensory information is not accurately perceived or there is interference with sensory information processing and cognition,motor function will be altered,and an athlete may become vulnerable to injury during sport participation.Athletes with SRC show neuroanatomic and neurophysiological changes relevant to motor control even after meeting return to sport criteria,including a normal neurological examination,resolution of symptoms,and return to baseline function on traditional concussion testing.In conjunction,altered motor function is demonstrated after SRC in muscle activation and force production,movement patterns,balance/postural stability,and motor task performance,especially performance of a motor task paired with a cognitive task(i.e.,dual-task condition).The clinical implications of this conceptual framework include a need to intentionally address motor control impairments after SRC to mitigate musculoskeletal injury risk and to monitor motor control as the athlete progresses through the return to sport continuum. 展开更多
关键词 Clinical management CONCUSSION INJURY Motor control REHABILITATION
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