Effects of beach training on strength in basketball players / Efeitos do treinamento na praia sobre a força dos jogadores de basquete / Efectos del entrenamiento en la playa sobre la fuerza de los jugadores de baloncesto

ABSTRACT Introduction: The characteristics of basketball require excellent players with athletic abilities such as high explosive strength for the instantaneous jump up, flexible movements and quick changes of direction, and accurate passing and shooting. These characteristics can also be found in beach games, and it is believed that the practice of these games can benefit the practice of basketball. Objective: Explore the effect of beach training on the physical fitness of basketball players. Methods: Through a randomized controlled trial, 24 basketball players were selected to analyze the explosive power of the lower extremity in the 40m sprint race and in the vertical jump, two representative indicators of the explosive power of the lower limbs. The group teaching experiment was conducted for 17 weeks, five times a week. Results: The comparison in the statistical test of the 40m sprint, and the vertical jump before and after the experiment proves that, compared with the traditional practice of basketball, the practice of beach games has a beneficial effect on improving the explosive power of the lower limbs. Conclusion: Beach sports training has benefits for basketball practice; the characteristics on the beach basketball court and the playing characteristics of the athletes determined this. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

RESUMO Introdução: As características do basquetebol exigem excelentes jogadores com habilidades atléticas como alta força explosiva para o salto instantâneo para cima, movimentos flexíveis e mudanças rápidas de direção, além de passes e tiros precisos. Essas são características que também podem ser encontradas nos jogos de praia e acredita-se que a prática desses jogos possa trazer algum benefício para a prática do basquetebol. Objetivo: Explorar o efeito do treinamento na praia sobre a aptidão física dos jogadores de basquetebol. Métodos: Através de um estudo randomizado controlado, foram selecionados 24 jogadores de basquetebol para analisar o poder explosivo da extremidade inferior no sprint de corrida de 40m e no salto vertical, dois indicadores representativos do poder explosivo dos membros inferiores, foram selecionados. O experimento de ensino em grupo foi realizado durante 17 semanas, cinco vezes por semana. Resultados: A comparação no teste estatístico dos 40m de sprint e do salto vertical antes e depois do experimento prova que, comparado com a prática tradicional do basquetebol, a prática dos jogos de praia tem um efeito benéfico na melhoria da potência explosiva dos membros inferiores. Conclusão: O treinamento com esporte de praia traz benefícios para a prática do basquetebol, isto foi determinado pelas características na quadra de basquetebol de praia e pelas características de jogabilidade dos esportistas. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.

RESUMEN Introducción: Las características del baloncesto exigen jugadores excelentes con habilidades atléticas como una gran fuerza explosiva para el salto instantáneo, movimientos flexibles y rápidos cambios de dirección, así como pases y tiros precisos. Son características que también se pueden encontrar en los juegos de playa y se cree que la práctica de estos juegos puede aportar algún beneficio a la práctica del baloncesto. Objetivo: Explorar el efecto del entrenamiento en la playa sobre la aptitud física de los jugadores de baloncesto. Métodos: Mediante un ensayo controlado aleatorio, se seleccionaron 24 jugadores de baloncesto para analizar la potencia explosiva de la extremidad inferior en la carrera de velocidad de 40 metros y en el salto vertical, dos indicadores representativos de la potencia explosiva de las extremidades inferiores. El experimento de enseñanza en grupo se llevó a cabo durante 17 semanas, cinco veces por semana. Resultados: La comparación en la prueba estadística del sprint de 40 metros y del salto vertical antes y después del experimento demuestra que, en comparación con la práctica tradicional del baloncesto, la práctica de los juegos de playa tiene un efecto beneficioso en la mejora de la potencia explosiva de los miembros inferiores. Conclusión: El entrenamiento deportivo en la playa aporta beneficios a la práctica del baloncesto, esto fue determinado por las características en la cancha de baloncesto en la playa y las características de jugabilidad de los atletas. Nivel de evidencia II; Estudios terapéuticos - investigación de los resultados del tratamiento.

Relationship between social short form video usage and mental health related behaviors among college students / 中国学校卫生

Objective@#To understand the impact of social short form videos on the health of college students, and to provide a basis for health education.@*Methods@#A total of 1 369 college students in 5 universities from Songjiang University Town in Shanghai, participated in this study. A cluster sampling method was employed and questionnaires were designed using a short video social media dependence scale and the Symptom Checklist 90(SCL-90). Data were analyzed and processed by independent sample t test.@*Results@#Participants who were dependent on social short form videos accounted for 31.99%, and significant differences in mental and physical health were found between participants who were dependent on short video use and those who were not dependent. Among short video use dependents, scores corresponding to negative mental health symptoms, such as anxiety (1.73±0.67), were higher than those in the non dependent group (1.64±0.42). Furthermore, scores corresponding to smoking, drinking, eating sweet food (1.88±0.40, 1.91±0.32, 2.15±0.51) and other physiological health factors were higher in the dependent group than the non dependent group (1.70±0.33, 1.79±0.29, 1.54±0.47)( P <0.05).@*Conclusion@#The use of short video social media platforms has a negative impact on the physical and mental health of college students. It is suggested that the critical ability of short video media through psychological counseling, strengthen the check ability of short video social media platforms, so as to help college students to develop coping strategies to diminish their dependence on short video social media.

Relationship between anthropometric parameters and 20 meter shuttle run test among children and adolescents / 中国学校卫生

Objective@#To determine the association between anthropometric parameters and 20 meter shuttle run test (20 m SRT) score among children and adolescents.@*Methods@#The convenient sampling method was conducted to select 3 192 primary and secondary school students in Baoan District, Shenzhen, based on the street school types school from April to May 2019. Height, weight, 20 m SRT score and general demographic indicators were assessed and collected. Individuals were divided into two groups based on the dose response correlation between different anthropometric parameters (the Z score of height, weight and BMI) and 20 m SRT score analyzed with the restricted cubic spline. The association between the Z score of height and 20 m SRT score was further analyzed using the Spearman correlation analysis. Logistic regression analysis was used to analyze separately the relationship different anthropometric parameters and 20 m SRT score.@*Results@#The Z value of weight and 20 m SRT score showed a non linear dose response association ( P <0.01), the significant but weak linear correlation between the Z value of height and 20 m SRT score ( r=0.06, P <0.05). The prevalence rate on the low level of the Z value of 20 m SRT score in 3 192 children and adolescents was 44.7%, and the gender ( χ 2=14.02, P <0.01) and grade difference ( χ 2=93.28, P <0.01) were both statistically significant. There was no significant relationship between the Z value of height and 20 m SRT score grade among total population, different genders and different grades ( P > 0.05). Compared with the reference group on the Z value of weight ≤-0.23, individuals with the Z value of weight >-0.23 had the low level of 20 m SRT score ( OR =0.61, P <0.05). Compared with the reference group on the Z value of BMI ≤ 0.25, individuals with the Z value of weight >0.25 had the low level of 20 m SRT score ( OR =0.45, P <0.05). Stratified for gender and grade, the above significant relationship on the Z value of weight, Z value of BMI and 20 m SRT score were still observed ( P <0.01).@*Conclusions@#The higher height Z value shows on correlations with 20 m SRT score, but the positive association is found between weight and BMI Z value and the 20 m SRT score. The cardiopulmonary fitness improvement may be more effective among children and adolescents when tuking weight and BMI Z scores into consideration.

Campus bullying and associated factors among college and middle school students in Tibet / 中国学校卫生

Objective@#To understand campus bullying in colleges and middle schools in Tibet, and to analyze related influencing factors, so as to provide reliable basis and reference for formulating targeted intervention measures.@*Methods@#A stratified cluster sampling method was used to investigate the status and influencing factors of being bullied by questionnaire among 3 875 college and middle school students in Ngari, Qamdo, Lhasa, Nagqu and Xigaze of Tibet, from September to November 2019. Chi-square test and Logistic regression method were used for data analysis.@*Results@#The report rate of campus bullying among college and middle school students in Tibet was 5.50%; 4.35% for girls and 6.76% for boys；8.81% for college students, 1.64% for senior high school students and 5.94% for junior high school students. The results of multivariate Logistic regression analysis showed that smoking ( OR =1.71), Internet addiction ( OR =3.82), depression ( OR =3.84), obesity ( OR =2.02), single parent family ( OR = 1.67 ) and reorganized family ( OR =3.74) were positively correlated with campus bullying ( P <0.05). Girls ( OR =0.66) and senior high school ( OR =0.28) were negatively correlated with campus bullying ( P <0.05).@*Conclusion@#Campus bullying is related to campus environment, family type, behaviors and life styles, etc. Efforts should be committed to build a caring campus culture and a good family moral education environment, in order to reduce the incidence of campus bullying and associated adverse effects.

Correlation between mental health problems with bullying behaviors among primary and middle school students / 中国学校卫生

Objective@#To analyze epidemiological characteristics of campus bullying among primary and middle school students in central China to explore its relation with mental health problems, and to provide a reference for the campus bullying prevention.@*Methods@#Stratified cluster sampling method was used to select primary and middle school 10 581 students from Anyang, Nanyang and Xinxiang cities of Henan Province, Middle School Students Mental Health Scale and the Self designed Scale of Adolescent Bullying Behavior were used to analyze the relationship between mental health problems with campus bullying behavior.@*Results@#The total report rate of bullying penetrator was 12.5% among students in the three cities. Among primary and middle school students with mental health problems such as hostility, interpersonal stress, academic pressure and emotional imbalance, the detection rate of bullying behavior was 24.2%, 20.3%, 19.4% and 20.1%, respectively. The results of multivariate analysis showed that hostility symptoms ( OR =3.78, 95% CI =1.71-8.32), interpersonal stress ( OR =3.50, 95% CI = 1.62 -7.57), academic pressure ( OR = 1.62 , 95% CI =1.21-2.16) and emotional imbalance ( OR =2.80, 95% CI =1.41-5.56) showed a significant impact on campus bullying ( P <0.05).@*Conclusion@#Mental health problems of primary and middle school students are closely related to the occurrence of bullying behavior. It is necessary to pay attention to the mental health education of bullies and intervene bullying behaviors from the source.

Shen-fu injection alleviates acute renal injury by reducing cytokine levels and modulating apoptosis in a porcine hemorrhagic shock model

ABSTRACT Purpose Shen-fu injection (SFI) was used to intervene in the resuscitation of porcine hemorrhagic shock (HS) model to study its protective effects on acute kidney injury. Methods After 60 min of HS, 28 animals were randomly assigned into four groups. The groups were as follows: hemorrhagic shock group (HS); HS resuscitation with shed-blood group (HSR); HS resuscitation with shed-blood and SFI (1 mL·kg-1) group (HSR-SFI); and the sham operation group (Sham). The bloods were analyzed for serum creatinine (sCr), cystatin C (CysC) and neutrophil gelatinase-associated lipocalin (NGAL). BAX, Bcl-2, and caspase-3 protein expressions by Western blot analysis and immunohistochemical staining. The renal tissues were removed and pathologic changes were observed. Results Mean aortic pressure (MAP) in HSR-SFI groups were higher than that in HSR groups after shock. At the 6th hour after shock, the urine volume per hour in the HSR-SFI groups was more than that in the HSR groups. The sCr, NGAL, CysC and cytokine levels of HSR-SFI groups were lower. The Bcl-2 expression was increased in the HSR-SFI groups. The BAX and caspase-3 expressions were reduced. The histopathologic score in the HSR-SFI was lower. Conclusions SFI may reduce the risk of acute kidney injury (AKI) following hemorrhagic shock by attenuating systemic inflammatory responses, and regulating the expression of apoptosis-related proteins.

Research in physical exercise among rural adolescents based on the theory of planned behavior in Sichuan Province / 中国学校卫生

Objective@#To verify the applicability of the theory of planned behavior(TPB) in the physical exercise behaviors of rural adolescents in Sichuan Province, and to explore the possible influencing factors of physical exercise behaviors, and to provide a theoretical basis for further effective intervention measures.@*Methods@#A total of 2 302 students were selected from grade seven and grade ten of two rural middle schools in Zizhong, Sichuan Province. The survey was conducted with a structured questionnaire. Using TPB as the research framework and basis, the structural equation model was constructed for analysis.@*Results@#Lack of physical exercise was 1 527(66.3%).Physical exercise behavior was statistically different among schools, grades(t=-7.40，-2.90，10.90,P<0.05)， and genders. Based on TPB, the structural equation model was established and corrected to obtain the revised model, and the fitting index GFI=0.93, CFI=0.94, NFI=0.94, TLI=0.93, IFI=0.94,RMSEA=0.07, indicating the model fitted good. Exercise intention directly affected exercise behaviors. The standardized effect was 0.45(95%CI=0.39-0.52). Subjective norms and perceived power were the main two mediators of the relationship between value evaluation and exercise intention. The standardized effect values were 0.66(95%CI=0.57-0.73), 0.23(95%CI=0.16-0.93)(P<0.01).@*Conclusion@#There is serious lack of physical exercise in rural adolescents in Sichuan Province. TPB has a good applicability for physical exercise in rural adolescents in Sichuan Province. Subjective norm is the most important factors to promote exercise intentions.

Abnormal spinal curvature in primary and secondary school students in Tibet / 中国学校卫生

Objective@#To monitor the incidence of spinal curvature abnormalities among primary and secondary school students in Tibet, and to analyze the factors influencing spinal curvature abnormalities among primary and secondary school students in Tibet.@*Methods@#This study was based on the surveillance and intervention of common diseases among students in Tibet in 2019, involving Lhasa, Shigatse, Nagqu, Chamdo, Shannan and Ali regions, using stratified random sampling, with one urban area and one county selected in each prefecture-level city, and a total of 19 023 primary and secondary school students were monitored. The spinal curvature of primary and secondary school students was statistically analyzed, and the influencing factors were analyzed by dichotomous Logistic regression.@*Results@#The number of detected spinal curvature abnormalities in primary and secondary school students was 223, with a detection rate of 1.17%. From the results of the χ 2 test, the differences in detection rates among students of different districts and gender varied significant ( χ 2=18.01, 8.07, both P <0.01). Multivariable Logistic regression showed that monitoring site, school section, gender, height, desk and chair allocation compliance rate, and average illumination of blackboard surface were associated with spinal curvature abnormalities in primary and secondary school students ( OR =5.44, 2.17, 2.46, 1.62, 1.02, 0.11, 1.00, all P <0.05).@*Conclusion@#Multiple measures should be taken to reduce the occurrence of spinal curvature abnormalities in primary and secondary school students, starting from the influencing factors.

Metrology and visual analysis of English literature regarding osteoporosis in the past 5 years: Based on the web of science / 中国组织工程研究

BACKGROUND: Osteoporosis has always been a hotspot in medical research. Visual analysis of English literature regarding osteoporosis can intuitively understand the research status, hotspots and frontiers in this field, and help researchers to hold on the research topic and direction. OBJECTIVE: To perform bibliometric, co-presence, co-citation, and visual analyses of English literature regarding osteoporosis, and to explore the relevant research status, research hotspots and dynamic frontiers in this field in the past 5 years. METHODS: The CiteSpace software was used for co-presence analysis of the authors, institutions, countries, and keywords and for co-citation analysis of cited authors, references, and journals in the 2015-2019 related literature included in the Science Citation Index Expanded (SCI-E) of Web of Science (WOS). RESULTS AND CONCLUSION: A total of 2 980 articles were included. High-yielding countries include China, the United States, Japan, South Korea, and the United Kingdom. The main research institutions are Pittsburgh University, Harvard University, McMaster University, Oxford University, and other world-renowned universities. Shanghai Jiao Tong University wins a place in the orthopedics research. As high-yielding authors, Hong-Wen Deng focuses on genetic and osteoporosis mechanisms; Hiroyuki Kato, Yukio Nakamura, and Takako Suzuki jointly focus on the development of anti-osteoporosis drugs such as denosumab and ibandronate; Jonathan D Adachi focuses on vitamin D and osteoporosis and bone metabolism research; William D Leslie focuses on dual-energy bone mineral density assessment of osteoporosis; JA Kanis focuses on the appropriate population and timing for anti-osteoporosis. Osteoporosis International and Journal of Bone and Mineral Research published the most of research regarding osteoarthritis. New England Journal of Medicine, LanceT, JAMA-J and other top publications are also very concerned about osteoporosis research. The research discipline involves clinical and basic disciplines, with a focus on basic subjects. Advances in the development of anti-osteoporosis drugs are an important entry point for basic medical research. Lack of osteoporosis, zoledronic acid, glucocorticoid-induced osteoporosis, fat mass, oophorectomy, osteoporosis, mineral density, ovarian cancer, anti-osteoporosis, and bone metabolism is the frontier of osteoporosis research. In 2015-2016, animal research and senile osteoporosis were hotspots. In 2016-2017, the design of randomized trials, adult bone metabolism, and physical activity interventions were emerging areas of osteoporosis research. In 2017-2019, glucocorticoid-induced osteoporosis, mesenchymal stem cells and activation of cellular pathways were emerging areas of osteoporosis research. To conclude, CiteSpace can be used to bibliometrically analyze the English literature of osteoporosis and intuitively reveal the overall development trend of osteoporosis research in the past 5 years. Therefore, it can provide references for osteoporosis scholars in the reference content and development direction of the topic, and the results have certain significance.

Clinical features of ordinany and severe COVID-19 cases / 预防医学

Objective @#To compare the clinical characteristics of ordinary and severe coronavirus disease 2019 ( COVID-19 ) cases, so as to provide basis for the diagnosis, treatment and prognosis. @*Methods @#We recruited 77 COVID-19 cases in Wenzhou Central Hospital from January 15 to February 29, 2020, collected their general information, clinical symptoms, laboratory test and CT scan results, and compared the clinical features of ordinary and severe cases.@*Results@# There were 50 ordinary cases and 27 severe cases. The age, prevalence of hypertension and other baseline diseases of severe cases were higher than those of ordinary cases ( P<0.05 ) . The maximum body temperature during 1-3 days of hospitalization, proportion of body temperature rising, prevalence of cough, yellow phlegm, hemoptysis, chest tightness and shortness of breath of severe cases were higher than those of ordinary cases ( all P<0.05 ) . The proportion of pulmonary consolidation, glazing and patch shadow, the number of solid changes and the cumulative number of lesions of severe cases were higher than those of ordinary cases ( all P<0.05 ) . The values of LYM during 1-10 days of hospitalization, total T-lymphocyte percentage, CD4 count and percentage, CD8 count, Hb and oxygenation index of severe cases were lower than those of ordinary cases; while the values of LDH and NLR during 1-10 days of hospitalization, N8R, AST, ferritin, CRP during 1-7 days of hospitalization and D-dimer of severe cases were higher than those of ordinary cases ( all P<0.05 ). @*Conclusions@#Severe COVID-19 cases have older age, higher prevalence of baseline diseases, fever, shortness of breath symptoms, more lung consolidation and lesions, significantly decreased lymphocyte level ( especially CD4 ) , and increased LDH, NLR, ferritin and CRP.

A study on eating disorders among overweight and obese adolescents in Bengbu / 中国学校卫生

Objective@#To investigate the status of eating disorders among overweight and obese adolescents as well as provide the basis for developing obesity precautionary and eating disorders.@*Methods@#910 adolescents of grade 4 to 6 in primary schools and grade 1 to 3 in junior middle schools were recruited in Bengbu by cluster random sampling to examine the association between obesity and eating disorders.@*Results@#A total of 203 children (22.3%) were overweight and obese, 547 children (60.1%) were normal weight and 160 children (17.6%) were low weight. The prevalence of overweight and obese in boys were significantly higher than those in girls (30.6% vs. 13.0%; χ2=40.55, P<0.01). Compared with normal weight group and low weight group, the scores of drive for thinness (DT), body dissatisfaction (BD), low self-esteem (LSE) and eating disorder risk composite (EDRC) were significantly higher in overweight and obese group (P<0.05). There was a positive association between the scores of DT(r=0.19), BD(r=0.30), LSE(r=0.09), interceptive deficits (ID) (r=0.08) and EDRC (rs=0.11) with body mass index (BMI)(P<0.05).@*Conclusion@#Eating disorders were associated with overweight and obesity of adolescents. A targeted strategies and measures should be conducted.

Cervical brucellar spondylitis causing incomplete limb paralysis

Abstract Brucellosis, a zoonosis with worldwide distribution, is a systemic infection caused by bacteria of the genus Brucella. Meanwhile, brucellosis often causes complications, such as osteoarticular involvement, and spondylitis is the most prevalent and important clinical form. Here, is a case of cervical brucellar spondylitis causing incomplete limb paralysis in a middle-aged male. The diagnosis was based on clinical history, and supported by Brucella serology and magnetic resonance imaging. Quadruple antibacterial treatment continued for four weeks. In this case, the epidural abscess causing spinal cord compression resolved without surgery. In addition, the patient had recovered from most of the neurologic deficits.

Expressions of CMTM6 and PD-L1 protein in glioma tissues and their correlation with clinicopathological characteristics of patients / 中国肿瘤生物治疗杂志

@# Objective: : To investigate the expressions of chemokine-like factor superfamily 6 (CMTM6) and programmed cell death ligand 1 (PD-L1) in glioma tissues and their correlation with clinicopathological features of patients. Methods： ：From January 2012 to December 2015, 86 brain glioma tissues and 30 brain tissues (Control group) from patients operated with decompressive of craniotomy were collected from the FifthAffiliated Hospital of Zhengzhou University. The distribution and expressions of CMTM6 and PD-L1 protein in brain glioma tissues were detected by immunohistochemistry and WB methods. The differential expression of CMTM6 and PDL1 between glioma tissues and normal brain tissues was analyzed by t test of two independent samples. Single variant χ2 test was used to analyze the relationship between the expression of CMTM6, PD-L1 and the clinicopathological features of patients. Results: The expression of CMTM6 in glioma tissues was significantly higher than that in control tissues (P<0.01). The expression levels of CMTM6 and PD-L1 in high pathological grade (WHO III-IV) glioma tissues were significantly higher than those in low pathological grade (WHO I-II) glioma tissues (all P<0.01). The expression of CMTM6 was correlated with pathological grade, dizziness history, epilepsy seizure and PD-L1 expression (all P<0.05), while the expression of PD-L1 was correlated with pathological grade, epilepsy seizure and CMTM6 expression (all P<0.05). Conclusion: There is a correlation between the expression of CMTM6 and PD-L1 in glioma tissues, both of which are highly expressed and are expected to be used to study glioma signaling pathways.

miR-1297 promotes malignant biological behaviors of breast cancer MCF-7 cells by down-regulating TET3 / 中国肿瘤生物治疗杂志

@# Objective: To investigate the regulatory effect of miR-1297 on the malignant biological behaviors of breast cancer cells and its underlying mechanism. Methods: Twenty pairs of breast cancer tissues and para-cancer tissues resected at the Department of Thyroid and Breast Surgery of Leshan People′ s Hospital from May 2016 to May 2018, as well as breast cancer cell lines MCF-7, SW626, HCC1937 and human breast epithelial MCF-10A cells were collected for this study. qPCR was performed to evaluate the expression of miR-1297 in breast cancer tissues and cell lines. The experimental cells were divided into control group, miR-1297 inhibitor group; TET3 over-expression group and simultaneous over-expression of TET3 and miR-1297 group. CCK-8 assay was used to detect the cell proliferation of MCF-7 cells; Transwell assay was carried out to detect the migration and invasion of MCF-7 cells; and WB was used to measure the expressions of TET3 and EMT related proteins (E-cadherin, N-cadherin and vimentin). Dual luciferase reporter gene assay was used to verify the relationship between miR-1297 and TET3. Results: miR-1297 was up-regulated in both breast cancer tissues and cell lines (P<0.01 or P<0.05). Knockdown of miR-1297 dramatically repressed the proliferation, migration, invasion and EMT of MCF-7 cells (P<0.01 or P<0.05). Over-expression of TET3 significantly up-regulated the expression of TET3 in MCF-7 cells (P<0.05). Simultaneous over-expression of TET3 and miR-1297 could reverse the expression level of TET3 in MCF-7 cells and the inhibitory effect of TET3 on the proliferation, migration, invasion and EMT of MCF-7 cells. Dual luciferase reporter gene assay results showed that miR-1297 targetedly bound to the 3' UTR of TET3. Further experiment results demonstrated that miR-1297 targetedly down-regulated TET3 and promoted the malignant biological behaviors of MCF-7 cells. Conclusion: miR-1297 is up-regulated in breast cancer tissues and cells; it promotes the malignant biological behaviors such as proliferation, migration, invasion and EMT through targetedly down-regulating the expression of TET3.

Effects of silencing the HIF-1α gene on the expression of BSP and osterix in rat BMMSCs under tension / 口腔疾病防治

Objective@#To explore the effect of hypoxia inducible factor 1α (HIF-1α) gene silencing in rat bone marrow mesenchymal stem cells (BMMSCs) under mechanical distraction on the expression of bone sialoprotein (BSP) and osterix and to provide a new idea for repairing bone defects with BMMSCs.@*Methods @#The shRNA sequence was designed according to the rat HIF-1α gene, and the pGMLV-SC1RNAi lentiviral vector was cloned after PCR amplification. After screening positive clones and identifying competent transformed cells by sequencing, 293T cells were packaged and titered, rat BMMSCs were transfected and cultured in vitro. Clones with stably silenced HIF-1α expression were screened by inverted fluorescence microscopy. The RNAi response experiment was divided into four groups: the blank control group, the HIF-1α shRNA group, the negative control group, and the response group. Western blot was used to detect the expression of HIF-1α protein in the four groups to verify the response of the target genes and exclude off-target effects. A Flexcell FX-5000T cell stress loading system was used to intervene in the mechanical stretch of the cells. qRT-PCR and Western blot were used to detect the expression of BSP and osterix in the blank control group, HIF-1α shRNA group, and negative control group.@*Results@#The HIF-1α shRNA lentiviral vector was successfully constructed. The results of the RNAi response showed no significant difference in the expression of HIF-1α between the response and the blank control group (P > 0.05). The recombinant lentivirus could effectively silence HIF-1α in BMMSCs. After mechanical distraction of the BMMSCs, compared with the blank and negative control groups, the HIF-1α shRNA group showed significantly increased mRNA and protein expression of the bone-related factors BSP and osterix (P < 0.05); there was no significant difference in the mRNA and protein expression of BSP or osterix between the blank and negative control groups (P > 0.05).@*Conclusion @#Silencing HIF-1α in BMMSCs under mechanical distraction can promote the expression of BSP and osterix.

Characteristics and enhanced antioxidant activity of glycated Morchella esculenta protein isolate

Abstract Morchella esculenta (L) Pers. is a highly valued edible and medicinal fungus that remains underutilized. For this study, the effects of glycation treatment on antioxidant activity and characteristics of the M. esculenta protein isolate (MPI) were investigated via the Maillard reaction. Conjugation between MPI and xylose was proven via UV-vis, FT-IR, intrinsic fluorescence analysis, and SDS-PAGE. Amino acid analysis revealed involvement of lysine, arginine and tyrosine in MPI, forming a covalent cross-link with xylose. Differential scanning calorimetry (DSC) results showed that glycated MPI (MPIG) possesses a more favorable thermal stability compared to native MPI (MPIN), heated MPI (MPIH) and an unheated mixture of MPI and xylose (MPI-XM). MPIG exhibited significantly enhanced antioxidant activity compared to MPIN, MPIH, and MPI-XM. These results indicate MPIG can serve as a promising novel source of nutraceutical and functional ingredients that exert antioxidant activity.

Tibial tunnel enlargement and joint instability after anterior cruciate ligament reconstruction. A prospective comparison between autograft and allograft

Abstract Purpose: To investigate tibial tunnel widening and knee instability after ACL reconstruction with hamstring autograft or irradiated soft tissue allograft. Methods: Eight-two patients were divided into two groups: autograft group and allograft group. Radiographic and clinical evaluations were performed. Results: Seventy patients were followed up with median of 36.3 months (range 36-38 months). Tibial tunnel widening was at or greater than 30% for nine patients in the autograft group and 15 patients in the allograft group (P = 0.0417). The average percentage of tibial tunnel widening was 26.7 ± 4.0 % and 29.7 ± 5.3 % in autograft and allograft groups, respectively (P = 0.0090). Knee range of motion was not affected by the reconstruction operation or different grafts. Thigh atrophy improved significantly within 24 months after ACL reconstructions in both groups. ACL reconstruction with the allograft leaded to less knee stability than that with the autograft from one year after operation (P = 0.0023). There was no significant difference between two groups with respect to Lysholm score (P = 0.1925) and Tegner score (P =0 .0918) at the final follow-up. Conclusion: The allograft group reported significantly more tibial tunnel widening and knee instability compared with the autograft group.

CLINICAL APPLICATION OF A DRILL GUIDE TEMPLATE FOR PEDICLE SCREW PLACEMENT IN SEVERE SCOLIOSIS / APLICAÇÃO CLÍNICA DE MATRIZ DE GUIA DE BROCA PARA COLOCAÇÃO DE PARAFUSO PEDICULAR EM ESCOLIOSE GRAVE

ABSTRACT Objective: To evaluate the accuracy and the effect of drill guide template for pedicle screw placement in severe scoliosis. Method: Eight patients with rigid scoliosis were enrolled, five males and three females, ranging from nine to 23 years old. A three-dimensional CT scan of the spine was performed and saved as a DICOM file type. The multi-level template was designed by Mimics software and manufactured according to the part of the most severe deformity. The drill template was placed on the corresponding vertebral surface. Pedicle screws were carefully inserted across the trajectory of the template. Postoperatively, the positions of the pedicle screws were evaluated by CT scan and graded for validation. Results: No spinal cord injury or nerve damage occurred. All patients had satisfactory outcomes. The abnormalities and the measures observed during operation were the same as those found in the preoperative period. The position of the pedicle screws was accurate, according to the postoperative X-ray and CT scan. The rate of scoliosis correction was 60%. Compared with controls, surgery time, blood loss and radiation were significantly lower. Conclusion: With the application of multi-level template, the placement of pedicle screws shows high accuracy in scoliosis with shorter surgical time, less blood loss and less radiation exposure. Level of Evidence III, Retrospective Comparative Study.

RESUMO Objetivo: Avaliar a precisão e o efeito da matriz de guia de broca para colocação de parafuso pedicular em escoliose grave. Método: Oito pacientes com escoliose rígida foram selecionados, sendo cinco homens e três mulheres na faixa etária de nove a 23 anos. Foi realizada TC tridimensional da coluna, gravada no formato DICOM. A matriz multinível foi desenhada pelo software Mimics e fabricada de acordo com a parte da deformidade mais grave. A matriz da broca foi colocada na superfície vertebral correspondente. Os parafusos pediculares foram cuidadosamente inseridos ao longo da trajetória da matriz. No pós-operatório, as posições dos parafusos pediculares foram avaliadas por TC e classificadas para validação. Resultados: Não ocorreu nenhuma lesão da medula espinhal nem lesão de nervos. Todos os pacientes tiveram desfechos satisfatórios. As anormalidades e as medidas observadas durante a operação foram as mesmas encontradas no pré-operatório. A posição dos parafusos pediculares foi precisa, de acordo com a radiografia e a TC pós-operatórias. A taxa de correção de escoliose foi de 60%. Em comparação com os controles, o tempo de cirurgia, a perda de sangue e a radiação foram significantemente menores. Conclusão: Com a aplicação da matriz multinível, a colocação dos parafusos pediculares mostra alta precisão na escoliose, com menor tempo cirúrgico, menos perda de sangue e menor exposição à radiação. Nível de Evidência III, Estudo Retrospectivo Comparativo.

Association between MTHFR A1298C Polymorphism and Male Infertility: A Meta-analysis / 华中科技大学学报（医学）（英德文版）

There have been several epidemiological studies evaluating the potential association between the methylenetetrahydrofolate reductase (MTHFR) A1298C polymorphism and the risk of male infertility.However,the results obtained were inconsistent.Therefore,we performed a meta-analysis to further examine the association between the MTHFR A1298C polymorphism and male infertility.A comprehensive search was conducted to identify all eligible studies from the online literature databases published prior to January 15th,2016.A total of 20 studies with 4293 cases and 4507 controls were included.An odds ratio (OR) and a 95％ confidence interval (95％ CI) were calculated to assess the strength of the association.A cumulative meta-analysis,sensitivity analysis and assessment of the publication bias were also performed in this study.The results showed that in the overall analysis,the association between the MTHFR A1298C polymorphism and male infertility was not significant.A stratified analysis by ethnicity revealed a significant increase in the risk of male infertility in the Asian population with the MTHFR A1298C polymorphism (especially in the heterozygote model:OR=l.20,95％ CI=1.01-1.44,P=0.994;the dominant model:OR=1.23,95％ CI=1.04-1.45,P=0.996;and the allele model:OR=l.20,95％ CI=1.04-1.39,P=0.985) but not in the Caucasian population.In the stratified analyses,no significant association was observed between the different types of male infertility.This meta-analysis suggests the MTHFR A1298C polymorphism may be a potential risk factor for male infertility,especially in the Asian population.