A numerical model based on measured fictive temperature distributions is explored to evaluate the residual stress fields of CO_(2)laser-annealed mitigated fused silica damage sites.The proposed model extracts the resi...A numerical model based on measured fictive temperature distributions is explored to evaluate the residual stress fields of CO_(2)laser-annealed mitigated fused silica damage sites.The proposed model extracts the residual strain from the differences in thermoelastic contraction of fused silica with different fictive temperatures from the initial frozen-in temperatures to ambient temperature.The residual stress fields of mitigated damage sites for the CO_(2)laser-annealed case are obtained by a finite element analysis of equilibrium equations and constitutive equations.The simulated results indicate that the proposed model can accurately evaluate the residual stress fields of laser-annealed mitigated damage sites with a complex thermal history.The calculated maximum hoop stress is in good agreement with the reported experimental result.The estimated optical retardance profiles from the calculated radial and hoop stress fields are consistent with the photoelastic measurements.These results provide sufficient evidence to demonstrate the suitability of the proposed model for describing the residual stresses of mitigated fused silica damage sites after CO_(2)laser annealing.展开更多
Background:Lung adenocarcinoma is a very pervasive histological form of lung cancers,and inhibiting metastasis is crucial for effective treatment.In this investigation,we explored the functional interaction of miR-30a...Background:Lung adenocarcinoma is a very pervasive histological form of lung cancers,and inhibiting metastasis is crucial for effective treatment.In this investigation,we explored the functional interaction of miR-30a-5p and the putative transcription factor 2 of the homeodomain(PHTF2)in dictating the aggressiveness and metastasis of lung adenocarcinoma.Method:We collected clinical samples to evaluate the expression patterns of miR-30a-5p and PHTF2 in lung adenocarcinoma along with normal tissues.Cellular experiments including cell count kit(CCK)-8 growth assay,apoptosis analysis,migration and invasion examinations were performed to assess the aggressiveness of lung adenocarcinoma cells.Furthermore,we examined tumorigenesis and metastasis in a nude mouse model.Results:MiR-30a-5p exhibited downregulation pattern in lung adenocarcinoma samples.Transfection of miR-30a-5p mimic in lung adenocarcinoma cells resulted in the suppression of malignant characteristics.Notably,the administration of miR-30a-5p mimic also curbed tumorigenesis and metastasis of lung adenocarcinoma cells in animal model.Moreover,PHTF2 was found to be a molecular target of miR-30a-5p.Upregulating PHTF2 counteracted the tumor-suppressive effect of the miR-30a-5p mimic.Conclusion:miR-30a-5p functions as a tumor-suppressive molecule while PHTF2 acts as an oncogenic factor in the development and metastasis of lung adenocarcinoma.Therefore,targeting miR-30a-5p and PHTF2 could be developed into a promising therapeutic approach for inhibiting metastasis in lung adenocarcinoma.展开更多
Effective and robust electrocatalysts are mainly based on innovative materials and unique structures.Herein,we designed a flakelike cobalt phosphide-based catalyst supporting on NiCo_(2)O_(4)nanorods array,which in-si...Effective and robust electrocatalysts are mainly based on innovative materials and unique structures.Herein,we designed a flakelike cobalt phosphide-based catalyst supporting on NiCo_(2)O_(4)nanorods array,which in-situ grew on the nickel foam(NF)current collector,referring as NCo_(2)P/NiCo_(2)O_(4)/NF electrode.By optimizing the microstructure and electronic structure through 3D hierarchy fabrication and nitrogen doping,the catalyst features with abundant electrochemical surface area,favorable surface wettability,excellent electron transport,as well as tailored d band center.Consequently,the as-prepared N-Co_(2)P/NiCo_(2)O_(4)/NF electrode exhibits an impressive HER activity with a low overpotentials of58 mV at 10 mA cm^(-2),a Tafel slop of 75 mV dec^(-1),as well as superior durability in alkaline medium.This work may provide a new pathway to effectively improve the hydrogen evolution performance of transition metal phosphides and to develop promising electrodes for practical electrocatalysis.展开更多
Inflammation plays an important role in the occurrence and development of many inflammatory diseases.The purpose of this study was to evaluate the anti-inflammatory effect and metabolic behavior of the dual targeting ...Inflammation plays an important role in the occurrence and development of many inflammatory diseases.The purpose of this study was to evaluate the anti-inflammatory effect and metabolic behavior of the dual targeting procyanidins(PC)nanoparticles on lipopolysaccharide(LPS)-stimulated inflammatory macrophages by metabolomics method.The double-targeting PC nanoparticles could specifi cally target both the CD44 receptor and mitochondria,while the single targeting PC-loaded nanoparticles that could target the CD44 receptor on the surface of macrophages.The double-targeting PC nanoparticles had better inhibitory effect than single-targeting PC nanoparticles on the leakage of lactate dehydrogenase and reactive oxygen species overexpression induced by LPS.Amino acid metabolism,energy metabolism and purine metabolism were disordered in LPS-treated group,and metabolic pathway analysis indicated that the double-targeting PC nanoparticles reversed some of LPS impacts.The changes of these potential biomarkers and their corresponding pathways are helpful to further understand the mechanism of PC nanoparticles in alleviating inflammation,and promote their application in nutrition intervention.展开更多
<strong>Objective:</strong> <span style="font-family:""><span style="font-family:Verdana;">To explore the inverted T-shaped flap nursing after breast-conserving surgery...<strong>Objective:</strong> <span style="font-family:""><span style="font-family:Verdana;">To explore the inverted T-shaped flap nursing after breast-conserving surgery combined with the reverse double V-shaped mastoconstriction suspension for breast cancer, and summarizes the nursing methods and experience. </span><b><span style="font-family:Verdana;">Method: </span></b><span style="font-family:Verdana;">5 patients who underwent reverse double V-shaped mastoconstriction suspension and formed inverted T-shaped flap incision were selected from the same medical group in the Department of Breast Cancer of Sun Yat-sen University’s Cancer Center from February 1, 2019 to April 30, 2019, and they were evaluated for the recovery of blood supply of skin flap, sensory function of nipple and areola, breast satisfaction, etc. </span><b><span style="font-family:Verdana;">Results: </span></b><span style="font-family:Verdana;">Among the 5 patients in this group, the flaps of them all survived smoothly. The one-year follow-up after the operation showed that they were satisfied with the appearance of the breast after the operation, with normal sensory function, and no secondary sagging. </span><b><span style="font-family:Verdana;">Conclusion:</span></b><span style="font-family:Verdana;"> The most important thing about the </span><a name="_Hlk80007513"></a><span style="font-family:Verdana;">inverted T-shaped flap after the reverse double V-shaped mastoconstriction suspension for breast cancer is the blood supply. Close observation of the condition of the skin flap after the operation, strengthening the care of the skin flap, and preventing infection are the keys to the success of the operation.</span></span>展开更多
Background: Breast cancer has become an important disease burden harmful to women’s health. The treatment of breast cancer is mainly surgical treatment. In the context of enhanced recovery after surgery, the average ...Background: Breast cancer has become an important disease burden harmful to women’s health. The treatment of breast cancer is mainly surgical treatment. In the context of enhanced recovery after surgery, the average length of hospital stay has been reduced, so there is increasing concern about postoperative patient discharge readiness. Objective: To identify factors influencing readiness for hospital discharge among patients having undergone breast cancer surgery and to explore the relationship between discharge readiness and the quality of discharge teaching. Methods: A total of 99 patients after breast cancer surgery at a regional tertiary medical tumor center in Guangzhou between June 2021 and December 2021 were collected using the convenience sampling method. A general data questionnaire, readiness for hospital discharge scale, and quality of discharge teaching scale were used to conduct a questionnaire survey on the subjects. Results: 83.8% of the patients feel ready for discharge, and the score of discharge readiness was 155.98 ± 28.87. The patients’ content received and the skills in teaching delivery were the influencing factors of discharge readiness. Discharged with a drainage tube was an independent factor of discharge readiness. Conclusions: Readiness for hospital discharge among patients undergoing breast cancer surgery was above medium level, and perfect intervention measures should be formulated for the influencing factors of discharge readiness. Especially, specific executable safeguard measures should be formulated for patients who are discharged early after surgery to promote the safety of home care.展开更多
Objective: The purpose of the study was to explore the application effects of the cloud platform-based comprehensive online management for breast cancer patients using dual-targeted therapy with macromolecular monoclo...Objective: The purpose of the study was to explore the application effects of the cloud platform-based comprehensive online management for breast cancer patients using dual-targeted therapy with macromolecular monoclonal antibodies. Methods: 120 breast cancer patients treated by dual-targeted therapy with macromolecular monoclonal antibodies were managed by a cloud platform from March to November 2019. Comprehensive online management included consultation about drugs and side effects and frequently asked questions in the dual-targeted therapy with macromolecular monoclonal antibodies. Results: In the consultation about drugs and side effects, there were five patients with fever, neutrophil, cough, and fatigue;24 with diarrhea;25 with nausea;11 with oral mucosal inflammation;10 with rashes and dry skin;8 with insomnia;and 1 with palpitation. Moreover, 110 patients with anxiety about the missed or delayed treatment were properly handled. Conclusion: The comprehensive online management of dual-targeted therapy with macromolecular monoclonal antibodies based on the cloud platform is helpful to satisfy the at-home breast cancer patients’ needs, ensure the continuity of dual-targeted therapy with macromolecular monoclonal antibodies for breast cancer patients, prevent misinformation, alleviate patients’ negative psychological emotions, and reduce patients’ economic losses. The online cloud platform integrated management model is crucial for managing patients with breast cancer treated by dual-targeted therapy.展开更多
Purpose: To explore the preventive effect of Regional cooling comprehensive nursing on hand foot syndrome caused by pegylated liposomal doxorubicin (PLD). Method: Adopt overall sampling method. Patients who used the s...Purpose: To explore the preventive effect of Regional cooling comprehensive nursing on hand foot syndrome caused by pegylated liposomal doxorubicin (PLD). Method: Adopt overall sampling method. Patients who used the same adjuvant drugs from January to December 2020 were randomly divided into an intervention group and a control group. The patients in the two groups received routine nursing guidance and drug prevention for the use of amygdalin. The patients in the intervention group were required to take protective measures of Regional cooling during chemotherapy. The occurrence of hand foot syndrome during adriamycin liposome administration was compared between the two groups. Results: By comparing the adverse reactions of cases during Adriamycin Administration, the incidence rates of grade I, II and III hand foot syndrome in the control group were 28.8%, 7.6% and 27.5% respectively, and the incidence rates of grade I, II and III hand foot syndrome in the intervention group were 42.1%, 12.3% and 7.0% respectively, with statistical significance (P Conclusion: Regional cooling nursing and preventive behavior guidance can effectively reduce the severity of hand foot syndrome caused by adriamycin.展开更多
Purpose: The effect of manual lymphatic drainage in patients with breast cancer is controversial. The purpose of this study is to evaluate the role of manual lymphatic drainage (MLD) in breast cancer-related lymphedem...Purpose: The effect of manual lymphatic drainage in patients with breast cancer is controversial. The purpose of this study is to evaluate the role of manual lymphatic drainage (MLD) in breast cancer-related lymphedema treatment. Methods: The electronic databases of EMBASE, PubMed, Web of Science, and The Cochrane Library were searched to find English articles on MLD which were published before January 2020. After two evaluators selected the studies and independently evaluated literature quality, meta-analysis was carried out with RevMan 5.3 software. The outcome index of lymphedema treatment changed in edema volume. Results: The study included six RCTs of 364 patients and the meta-analysis showed no significant difference in the effect of MLD for BCRL compared with other treatments (mean difference, 3.76;95% confidence interval, -35.09 to 42.62;Z, 0.19;p = 0.850). Conclusion: MLD can relieve the body tissue, rapidly improve local condition, and enhance complete decongestive therapy (CDT) efficacy. MLD can prevent BCRL and improve the symptoms of stage I lymphedema. It should be widely applied to prevent BCRL from entering an irreversible state.展开更多
Background: Gastric cancer is one of the most common malignant tumors in the world. In recent years, studies on chemotherapy-induced cognitive impairment have been reported mainly on young women with breast cancer. On...Background: Gastric cancer is one of the most common malignant tumors in the world. In recent years, studies on chemotherapy-induced cognitive impairment have been reported mainly on young women with breast cancer. Only few studies on chemotherapy-related cognitive impairment in patients with gastric cancer. Objective: To investigate the effect of chemotherapy on cognitive function in patients with advanced gastric cancer. Methods: Sixty patients with stage IV gastric cancer who received fluorouracil based chemotherapy were selected as gastric cancer group, including 25 patients with S-1 (S-1 group) and 35 patients with capecitabine (capecitabine group). 60 healthy controls matched with age and education level were recruited as control group. Mini Mental State Examination (MMSE), Montreal Cognitive Assessment (MoCA) and Auditory Verbal Learning Test (AVLT) were used to test. Results: There was no significant difference in MMSE, MoCA and AVLT between healthy control group and gastric cancer group before chemotherapy. MMSE, MoCA, immediate memory and delayed memory decreased in gastric cancer patients after chemotherapy (t = 2.206, t = 2.399, t = 2.206, t = 2.654, P Conclusion: Patients with gastric cancer will have chemotherapy-related cognitive dysfunction after chemotherapy. It is necessary to evaluate and guide or treat patients with cognitive function, so as to improve the quality of life of patients.展开更多
Composite supports CeO2-ZrO2-Al2O3 (CZA) and CeO2-ZrO2-Al2O3-La2O3 (CZALa) were prepared by co-precipitation method. Palladium catalysts were prepared by impregnation and their purification ability for CH4, CO and NOx...Composite supports CeO2-ZrO2-Al2O3 (CZA) and CeO2-ZrO2-Al2O3-La2O3 (CZALa) were prepared by co-precipitation method. Palladium catalysts were prepared by impregnation and their purification ability for CH4, CO and NOx in the mixture gas simulated the exhaust from natural gas vehicles (NGVs) operated under stoichiometric condition was investigated. The effect of La2O3 on the physicochemical properties of supports and catalysts was characterized by various techniques. The characterizations with X-ray diffraction (XRD) and Raman spectroscopy revealed that the doping of La2O3 restrained effectively the sintering of crystallite particles, maintained the crystallite particles in nanoscale and stabilized the crystal phase after calcination at 1000℃. The results of N2-adsorption, H2-temperature-programmed reduction (H2-TPR) and oxygen storage capacity (OSC) measurements indicated that La2O3 improved the textural properties, reducibility and OSC of composite supports. Activity testing results showed that the catalysts exhibit excellent activities for the simultaneous removal of methane, CO and NOx in the simulated exhaust gas. The catalysts supported on CZALa showed remarkable thermal stability and catalytic activity for the three pollutants, especially for NOx. The prepared palladium catalysts have high ability to remove NOx, CH4 and CO, and they can be used as excellent catalysts for the purification of exhaust from NGVs operated under stoichiometric condition. The catalysts reported in this work also have significant potential in industrial application because of their high performance and low cost.展开更多
Objective:To evaluate the Anaplasma phagocytophilum(A.phagocytophilum),Ehrlichia canis(E.canis,Dirofilaria immitis(D.immitis)(canine heartworm),Borrelia burgdorferi(B.burgdorferi)infections in countryside dogs from Yu...Objective:To evaluate the Anaplasma phagocytophilum(A.phagocytophilum),Ehrlichia canis(E.canis,Dirofilaria immitis(D.immitis)(canine heartworm),Borrelia burgdorferi(B.burgdorferi)infections in countryside dogs from Yunnan,Hainan and Anhui provinces.Methods:Serum samples were collected from 26 dogs in Yunnan.Hainan and Anhui provinces.The samples were tested using a commercial ELISA rapid diagnostic assay kit(SNAP^(?)4Dx^(?);IDEXX Laboratories,Inc.U.S.A.).Meaiiwliile,indirect immunofluorescence assay(IFA)recommended by WHO was conducted to delect IgG to A.phagocytophilum.Two methods were analyzed and compared.Results:The number of serologically positive dogs for IgG to A.phagocytophilum was only 2which was from Hainan province and none of the 26 dogs responded positive for E.canu.D.immitis(canine heartworm,and B.burgdorferi by ELISA rapid diagnostic method.The number of serologically positive dogs for IgG to A.phagocytophilum was 13(50%)by IFA method.Data of the two methods were analyzed by statistical software and the difference was statistically significant(P=0.002).Conclusions:It can be concluded that IFA method was more sensitive than ELISA rapid diagnostic method.However,we need conduct further and intensive epidemiology survey on tick-born diseases pathogens including.4.phagocytophilum,E.canis,D.immitis(canine heartworm),and B.burgdorferi which have public health significance.展开更多
Objective:To investigate the situation of anaplasmosis in Yiyuan county.Shandong Province. Methods:A total of 26 blood samples from febrile patients suspected of anaplasmosis,48 blood samples from healthy farmers,8 fr...Objective:To investigate the situation of anaplasmosis in Yiyuan county.Shandong Province. Methods:A total of 26 blood samples from febrile patients suspected of anaplasmosis,48 blood samples from healthy farmers,8 from dogs,and 10 from goats and 170 ticks were collected in the same area during 2005-2007,and detected by serological and molecular methods.Results: Eight confirmed cases and 6 probable cases were determined using serologic and molecular methods.The seroprevalence of Anaplasma phagocytophilum(A.phagocytophilum) was 26.7% in healthy cases.Nine out of 10 sheep samples and 7 out of 8 dog samples reacted positively to the A.phagocytophilum antigen.PCR amplification and sequencing of the 16SrRNA of,4. phagocytophilum gene showed that some samples from patients,goats and ticks were 100% identical.The seroprevalence of Rickettsia typhi was 22.9%,Orientia tsutsugamushi 6.3%, Rickettsia sibirica 27.1%,Coxiella burnetii 18.8%,Bartonella henselae 31.3%,and Borrelia burgdorferi 41.6%.Conclusions:It is important to make differential diagnosis of febrile patients and to apply treatment with specific antibiotics.It is needed to enforce essential prevention and control measures including tick control and to improve sanitation conditions.展开更多
High resolution Fresnel zone plates for nanoscale three-dimensional imaging of materials by both soft and hard x-rays are increasingly needed by the broad applications in nanoscience and nanotechnology.When the outmos...High resolution Fresnel zone plates for nanoscale three-dimensional imaging of materials by both soft and hard x-rays are increasingly needed by the broad applications in nanoscience and nanotechnology.When the outmost zone-width is shrinking down to 50 nm or even below,patterning the zone plates with high aspect ratio by electron beam lithography still remains a challenge because of the proximity effect.The uneven charge distribution in the exposed resist is still frequently observed even after standard proximity effect correction(PEC),because of the large variety in the line width.This work develops a new strategy,nicknamed as local proximity effect correction(LPEC),efficiently modifying the deposited energy over the whole zone plate on the top of proximity effect correction.By this way,50 nm zone plates with the aspect ratio from 4:1 up to 15:1 and the duty cycle close to 0.5 have been fabricated.Their imaging capability in soft(1.3 keV)and hard(9 keV)x-ray,respectively,has been demonstrated in Shanghai Synchrotron Radiation Facility(SSRF)with the resolution of 50 nm.The local proximity effect correction developed in this work should also be generally significant for the generation of zone plates with high resolutions beyond 50 nm.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.62275235).
文摘A numerical model based on measured fictive temperature distributions is explored to evaluate the residual stress fields of CO_(2)laser-annealed mitigated fused silica damage sites.The proposed model extracts the residual strain from the differences in thermoelastic contraction of fused silica with different fictive temperatures from the initial frozen-in temperatures to ambient temperature.The residual stress fields of mitigated damage sites for the CO_(2)laser-annealed case are obtained by a finite element analysis of equilibrium equations and constitutive equations.The simulated results indicate that the proposed model can accurately evaluate the residual stress fields of laser-annealed mitigated damage sites with a complex thermal history.The calculated maximum hoop stress is in good agreement with the reported experimental result.The estimated optical retardance profiles from the calculated radial and hoop stress fields are consistent with the photoelastic measurements.These results provide sufficient evidence to demonstrate the suitability of the proposed model for describing the residual stresses of mitigated fused silica damage sites after CO_(2)laser annealing.
基金This work was supported by the Basic Research Program of Yunnan Province-Joint Project of Kunming Medical University No.202101AY070001−169.
文摘Background:Lung adenocarcinoma is a very pervasive histological form of lung cancers,and inhibiting metastasis is crucial for effective treatment.In this investigation,we explored the functional interaction of miR-30a-5p and the putative transcription factor 2 of the homeodomain(PHTF2)in dictating the aggressiveness and metastasis of lung adenocarcinoma.Method:We collected clinical samples to evaluate the expression patterns of miR-30a-5p and PHTF2 in lung adenocarcinoma along with normal tissues.Cellular experiments including cell count kit(CCK)-8 growth assay,apoptosis analysis,migration and invasion examinations were performed to assess the aggressiveness of lung adenocarcinoma cells.Furthermore,we examined tumorigenesis and metastasis in a nude mouse model.Results:MiR-30a-5p exhibited downregulation pattern in lung adenocarcinoma samples.Transfection of miR-30a-5p mimic in lung adenocarcinoma cells resulted in the suppression of malignant characteristics.Notably,the administration of miR-30a-5p mimic also curbed tumorigenesis and metastasis of lung adenocarcinoma cells in animal model.Moreover,PHTF2 was found to be a molecular target of miR-30a-5p.Upregulating PHTF2 counteracted the tumor-suppressive effect of the miR-30a-5p mimic.Conclusion:miR-30a-5p functions as a tumor-suppressive molecule while PHTF2 acts as an oncogenic factor in the development and metastasis of lung adenocarcinoma.Therefore,targeting miR-30a-5p and PHTF2 could be developed into a promising therapeutic approach for inhibiting metastasis in lung adenocarcinoma.
基金financially supported by the National Key R&D Program of China,China(2018YFA0703503)the National Natural Science Foundation of China,China(No.51872024,51932001,21971245)。
文摘Effective and robust electrocatalysts are mainly based on innovative materials and unique structures.Herein,we designed a flakelike cobalt phosphide-based catalyst supporting on NiCo_(2)O_(4)nanorods array,which in-situ grew on the nickel foam(NF)current collector,referring as NCo_(2)P/NiCo_(2)O_(4)/NF electrode.By optimizing the microstructure and electronic structure through 3D hierarchy fabrication and nitrogen doping,the catalyst features with abundant electrochemical surface area,favorable surface wettability,excellent electron transport,as well as tailored d band center.Consequently,the as-prepared N-Co_(2)P/NiCo_(2)O_(4)/NF electrode exhibits an impressive HER activity with a low overpotentials of58 mV at 10 mA cm^(-2),a Tafel slop of 75 mV dec^(-1),as well as superior durability in alkaline medium.This work may provide a new pathway to effectively improve the hydrogen evolution performance of transition metal phosphides and to develop promising electrodes for practical electrocatalysis.
基金supported by the National Science Fund for Distinguished Young Scholars of China(31925031).
文摘Inflammation plays an important role in the occurrence and development of many inflammatory diseases.The purpose of this study was to evaluate the anti-inflammatory effect and metabolic behavior of the dual targeting procyanidins(PC)nanoparticles on lipopolysaccharide(LPS)-stimulated inflammatory macrophages by metabolomics method.The double-targeting PC nanoparticles could specifi cally target both the CD44 receptor and mitochondria,while the single targeting PC-loaded nanoparticles that could target the CD44 receptor on the surface of macrophages.The double-targeting PC nanoparticles had better inhibitory effect than single-targeting PC nanoparticles on the leakage of lactate dehydrogenase and reactive oxygen species overexpression induced by LPS.Amino acid metabolism,energy metabolism and purine metabolism were disordered in LPS-treated group,and metabolic pathway analysis indicated that the double-targeting PC nanoparticles reversed some of LPS impacts.The changes of these potential biomarkers and their corresponding pathways are helpful to further understand the mechanism of PC nanoparticles in alleviating inflammation,and promote their application in nutrition intervention.
文摘本研究拟建立检测CK19基因表达的数字PCR(digital PCR,dPCR)方法并测试其性能,以期利用该方法的超高敏感性和绝对定量优势进行循环肿瘤细胞(circulating tumor cells,CTC)的定量分析。首先,根据CK19基因的mRNA序列进行引物探针设计,以看家基因ABL1作为内参,采用人乳腺癌MCF7细胞和健康人白细胞从13套引物探针之中筛选出了最佳的引物探针,测序结果证实扩增序列无误。其次,针对选定的引物探针进行反应条件的优化,以不同浓度的健康人白细胞cDNA为模板进行空白检测限(limit of blank,LOB)的分析,证实当ABL1基因拷贝数为20,000、15,000、10,000、5000、2500时,CK19的LOB分别为9.24、8.93、3.12、3.17和2.53拷贝。再次,采用MCF7细胞和健康人白细胞的cDNA模板进行不同浓度预混的检测限(limit of detection,LOD)分析,证实50%、10%、5%、1%、0.5%和0.1%的浓度配比下均可以有效检出CK19基因,线性R2值为0.9998。最终,临床样本的数字PCR检测结果发现晚期乳腺癌患者的CK19拷贝数高于健康人对照。上述结果说明本研究所建立的检测CK19基因的数字PCR方法具有敏感、特异和定量准确等优势,未来经过进一步验证之后有望用于乳腺癌的CTC定量分析,具有良好的应用前景。
文摘<strong>Objective:</strong> <span style="font-family:""><span style="font-family:Verdana;">To explore the inverted T-shaped flap nursing after breast-conserving surgery combined with the reverse double V-shaped mastoconstriction suspension for breast cancer, and summarizes the nursing methods and experience. </span><b><span style="font-family:Verdana;">Method: </span></b><span style="font-family:Verdana;">5 patients who underwent reverse double V-shaped mastoconstriction suspension and formed inverted T-shaped flap incision were selected from the same medical group in the Department of Breast Cancer of Sun Yat-sen University’s Cancer Center from February 1, 2019 to April 30, 2019, and they were evaluated for the recovery of blood supply of skin flap, sensory function of nipple and areola, breast satisfaction, etc. </span><b><span style="font-family:Verdana;">Results: </span></b><span style="font-family:Verdana;">Among the 5 patients in this group, the flaps of them all survived smoothly. The one-year follow-up after the operation showed that they were satisfied with the appearance of the breast after the operation, with normal sensory function, and no secondary sagging. </span><b><span style="font-family:Verdana;">Conclusion:</span></b><span style="font-family:Verdana;"> The most important thing about the </span><a name="_Hlk80007513"></a><span style="font-family:Verdana;">inverted T-shaped flap after the reverse double V-shaped mastoconstriction suspension for breast cancer is the blood supply. Close observation of the condition of the skin flap after the operation, strengthening the care of the skin flap, and preventing infection are the keys to the success of the operation.</span></span>
文摘Background: Breast cancer has become an important disease burden harmful to women’s health. The treatment of breast cancer is mainly surgical treatment. In the context of enhanced recovery after surgery, the average length of hospital stay has been reduced, so there is increasing concern about postoperative patient discharge readiness. Objective: To identify factors influencing readiness for hospital discharge among patients having undergone breast cancer surgery and to explore the relationship between discharge readiness and the quality of discharge teaching. Methods: A total of 99 patients after breast cancer surgery at a regional tertiary medical tumor center in Guangzhou between June 2021 and December 2021 were collected using the convenience sampling method. A general data questionnaire, readiness for hospital discharge scale, and quality of discharge teaching scale were used to conduct a questionnaire survey on the subjects. Results: 83.8% of the patients feel ready for discharge, and the score of discharge readiness was 155.98 ± 28.87. The patients’ content received and the skills in teaching delivery were the influencing factors of discharge readiness. Discharged with a drainage tube was an independent factor of discharge readiness. Conclusions: Readiness for hospital discharge among patients undergoing breast cancer surgery was above medium level, and perfect intervention measures should be formulated for the influencing factors of discharge readiness. Especially, specific executable safeguard measures should be formulated for patients who are discharged early after surgery to promote the safety of home care.
文摘Objective: The purpose of the study was to explore the application effects of the cloud platform-based comprehensive online management for breast cancer patients using dual-targeted therapy with macromolecular monoclonal antibodies. Methods: 120 breast cancer patients treated by dual-targeted therapy with macromolecular monoclonal antibodies were managed by a cloud platform from March to November 2019. Comprehensive online management included consultation about drugs and side effects and frequently asked questions in the dual-targeted therapy with macromolecular monoclonal antibodies. Results: In the consultation about drugs and side effects, there were five patients with fever, neutrophil, cough, and fatigue;24 with diarrhea;25 with nausea;11 with oral mucosal inflammation;10 with rashes and dry skin;8 with insomnia;and 1 with palpitation. Moreover, 110 patients with anxiety about the missed or delayed treatment were properly handled. Conclusion: The comprehensive online management of dual-targeted therapy with macromolecular monoclonal antibodies based on the cloud platform is helpful to satisfy the at-home breast cancer patients’ needs, ensure the continuity of dual-targeted therapy with macromolecular monoclonal antibodies for breast cancer patients, prevent misinformation, alleviate patients’ negative psychological emotions, and reduce patients’ economic losses. The online cloud platform integrated management model is crucial for managing patients with breast cancer treated by dual-targeted therapy.
文摘Purpose: To explore the preventive effect of Regional cooling comprehensive nursing on hand foot syndrome caused by pegylated liposomal doxorubicin (PLD). Method: Adopt overall sampling method. Patients who used the same adjuvant drugs from January to December 2020 were randomly divided into an intervention group and a control group. The patients in the two groups received routine nursing guidance and drug prevention for the use of amygdalin. The patients in the intervention group were required to take protective measures of Regional cooling during chemotherapy. The occurrence of hand foot syndrome during adriamycin liposome administration was compared between the two groups. Results: By comparing the adverse reactions of cases during Adriamycin Administration, the incidence rates of grade I, II and III hand foot syndrome in the control group were 28.8%, 7.6% and 27.5% respectively, and the incidence rates of grade I, II and III hand foot syndrome in the intervention group were 42.1%, 12.3% and 7.0% respectively, with statistical significance (P Conclusion: Regional cooling nursing and preventive behavior guidance can effectively reduce the severity of hand foot syndrome caused by adriamycin.
文摘Purpose: The effect of manual lymphatic drainage in patients with breast cancer is controversial. The purpose of this study is to evaluate the role of manual lymphatic drainage (MLD) in breast cancer-related lymphedema treatment. Methods: The electronic databases of EMBASE, PubMed, Web of Science, and The Cochrane Library were searched to find English articles on MLD which were published before January 2020. After two evaluators selected the studies and independently evaluated literature quality, meta-analysis was carried out with RevMan 5.3 software. The outcome index of lymphedema treatment changed in edema volume. Results: The study included six RCTs of 364 patients and the meta-analysis showed no significant difference in the effect of MLD for BCRL compared with other treatments (mean difference, 3.76;95% confidence interval, -35.09 to 42.62;Z, 0.19;p = 0.850). Conclusion: MLD can relieve the body tissue, rapidly improve local condition, and enhance complete decongestive therapy (CDT) efficacy. MLD can prevent BCRL and improve the symptoms of stage I lymphedema. It should be widely applied to prevent BCRL from entering an irreversible state.
文摘Background: Gastric cancer is one of the most common malignant tumors in the world. In recent years, studies on chemotherapy-induced cognitive impairment have been reported mainly on young women with breast cancer. Only few studies on chemotherapy-related cognitive impairment in patients with gastric cancer. Objective: To investigate the effect of chemotherapy on cognitive function in patients with advanced gastric cancer. Methods: Sixty patients with stage IV gastric cancer who received fluorouracil based chemotherapy were selected as gastric cancer group, including 25 patients with S-1 (S-1 group) and 35 patients with capecitabine (capecitabine group). 60 healthy controls matched with age and education level were recruited as control group. Mini Mental State Examination (MMSE), Montreal Cognitive Assessment (MoCA) and Auditory Verbal Learning Test (AVLT) were used to test. Results: There was no significant difference in MMSE, MoCA and AVLT between healthy control group and gastric cancer group before chemotherapy. MMSE, MoCA, immediate memory and delayed memory decreased in gastric cancer patients after chemotherapy (t = 2.206, t = 2.399, t = 2.206, t = 2.654, P Conclusion: Patients with gastric cancer will have chemotherapy-related cognitive dysfunction after chemotherapy. It is necessary to evaluate and guide or treat patients with cognitive function, so as to improve the quality of life of patients.
基金supported by the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(No.2020L0609 and No.2020L0556)the Doctoral research funds of Jinzhong University(jzxybsjjxm2019005)the Basic Research Program in Shanxi Province under the Grant No.20210302124345。
基金supported by the National Natural Science Foundation of China (No. 20773090, 20803049)the National High Technology Researchand Development Program of China (863 Program, No. 2006AA06Z347)the Specialized Research Fund for the Doctoral Program of Higher Education(20070610026)
文摘Composite supports CeO2-ZrO2-Al2O3 (CZA) and CeO2-ZrO2-Al2O3-La2O3 (CZALa) were prepared by co-precipitation method. Palladium catalysts were prepared by impregnation and their purification ability for CH4, CO and NOx in the mixture gas simulated the exhaust from natural gas vehicles (NGVs) operated under stoichiometric condition was investigated. The effect of La2O3 on the physicochemical properties of supports and catalysts was characterized by various techniques. The characterizations with X-ray diffraction (XRD) and Raman spectroscopy revealed that the doping of La2O3 restrained effectively the sintering of crystallite particles, maintained the crystallite particles in nanoscale and stabilized the crystal phase after calcination at 1000℃. The results of N2-adsorption, H2-temperature-programmed reduction (H2-TPR) and oxygen storage capacity (OSC) measurements indicated that La2O3 improved the textural properties, reducibility and OSC of composite supports. Activity testing results showed that the catalysts exhibit excellent activities for the simultaneous removal of methane, CO and NOx in the simulated exhaust gas. The catalysts supported on CZALa showed remarkable thermal stability and catalytic activity for the three pollutants, especially for NOx. The prepared palladium catalysts have high ability to remove NOx, CH4 and CO, and they can be used as excellent catalysts for the purification of exhaust from NGVs operated under stoichiometric condition. The catalysts reported in this work also have significant potential in industrial application because of their high performance and low cost.
基金supported by the National Basic Research Program of China(973 Program)2010CB530200(2010CB530206)the China-US Collaborative Program on Emerging and Re-emerging Infectious Disease(No.1U2GGH000018-01)
文摘Objective:To evaluate the Anaplasma phagocytophilum(A.phagocytophilum),Ehrlichia canis(E.canis,Dirofilaria immitis(D.immitis)(canine heartworm),Borrelia burgdorferi(B.burgdorferi)infections in countryside dogs from Yunnan,Hainan and Anhui provinces.Methods:Serum samples were collected from 26 dogs in Yunnan.Hainan and Anhui provinces.The samples were tested using a commercial ELISA rapid diagnostic assay kit(SNAP^(?)4Dx^(?);IDEXX Laboratories,Inc.U.S.A.).Meaiiwliile,indirect immunofluorescence assay(IFA)recommended by WHO was conducted to delect IgG to A.phagocytophilum.Two methods were analyzed and compared.Results:The number of serologically positive dogs for IgG to A.phagocytophilum was only 2which was from Hainan province and none of the 26 dogs responded positive for E.canu.D.immitis(canine heartworm,and B.burgdorferi by ELISA rapid diagnostic method.The number of serologically positive dogs for IgG to A.phagocytophilum was 13(50%)by IFA method.Data of the two methods were analyzed by statistical software and the difference was statistically significant(P=0.002).Conclusions:It can be concluded that IFA method was more sensitive than ELISA rapid diagnostic method.However,we need conduct further and intensive epidemiology survey on tick-born diseases pathogens including.4.phagocytophilum,E.canis,D.immitis(canine heartworm),and B.burgdorferi which have public health significance.
基金supported by the National Basic Research Program of China(973 Program) 2010CB530200(2010CB530206)the National Natural Science Foundation of China(No.30771854)National Key Science and Technology Projects of China(Project No.2008ZX10004-008)
文摘Objective:To investigate the situation of anaplasmosis in Yiyuan county.Shandong Province. Methods:A total of 26 blood samples from febrile patients suspected of anaplasmosis,48 blood samples from healthy farmers,8 from dogs,and 10 from goats and 170 ticks were collected in the same area during 2005-2007,and detected by serological and molecular methods.Results: Eight confirmed cases and 6 probable cases were determined using serologic and molecular methods.The seroprevalence of Anaplasma phagocytophilum(A.phagocytophilum) was 26.7% in healthy cases.Nine out of 10 sheep samples and 7 out of 8 dog samples reacted positively to the A.phagocytophilum antigen.PCR amplification and sequencing of the 16SrRNA of,4. phagocytophilum gene showed that some samples from patients,goats and ticks were 100% identical.The seroprevalence of Rickettsia typhi was 22.9%,Orientia tsutsugamushi 6.3%, Rickettsia sibirica 27.1%,Coxiella burnetii 18.8%,Bartonella henselae 31.3%,and Borrelia burgdorferi 41.6%.Conclusions:It is important to make differential diagnosis of febrile patients and to apply treatment with specific antibiotics.It is needed to enforce essential prevention and control measures including tick control and to improve sanitation conditions.
基金Project supported by the National Natural Science Foundation of China(Grant No.U1732104)China Postdoctoral Science Foundation(Grant No.2017M611443)Shanghai STCSM2019-11-20 Grant,China(Grant No.19142202700)。
文摘High resolution Fresnel zone plates for nanoscale three-dimensional imaging of materials by both soft and hard x-rays are increasingly needed by the broad applications in nanoscience and nanotechnology.When the outmost zone-width is shrinking down to 50 nm or even below,patterning the zone plates with high aspect ratio by electron beam lithography still remains a challenge because of the proximity effect.The uneven charge distribution in the exposed resist is still frequently observed even after standard proximity effect correction(PEC),because of the large variety in the line width.This work develops a new strategy,nicknamed as local proximity effect correction(LPEC),efficiently modifying the deposited energy over the whole zone plate on the top of proximity effect correction.By this way,50 nm zone plates with the aspect ratio from 4:1 up to 15:1 and the duty cycle close to 0.5 have been fabricated.Their imaging capability in soft(1.3 keV)and hard(9 keV)x-ray,respectively,has been demonstrated in Shanghai Synchrotron Radiation Facility(SSRF)with the resolution of 50 nm.The local proximity effect correction developed in this work should also be generally significant for the generation of zone plates with high resolutions beyond 50 nm.
