China ; Evidence-Based Medicine ; methods ; Humans ; Orthopedics ; methods

BACKGROUND:Glutathione S-transferase can get rid of active oxygen and enhance organism's antioxidative capability.OBJECTIVE:To analyze the association between glutathione S-transferase P1-105 (GSTP1-105)genetic polymorphisms and human exercise capacity in the high altitude environment.DESIGN,TIME AND SETTING:A controlled analysis was performed in the PLA Institute of Physical Education in 2007.PARTICIPANTS:A total of 86 professional mountain climbers who had strong physical performance in the high altitude environment served as experimental subjects.An additional 90 healthy students randomly selected from the PLA Institute of Physical Education served as controls.METHODS:Blood sample was taken from 86 experimental subjects and 90 healthy controls for extraction of genome DNA.GSTP1-105 genetic polymorphisms were detected by polymerase chain reaction-restriction fragment length polymorphism analysis.Distribution of GSTP1-105 alleles and genotypes were compared between experimental and control subjects.MAIN OUTCOME MEASURES:Distribution of GSTP1-105 genotype.RESULTS:Totally 3 GSTP1-105 genotypes were detected:homozygous genotype of the A allele (NA,also called wide type genotype),heterozygous genotype (NG),and homozygous genotype of the G allele (G/G).The frequency of the G allele and variant genotype (A/G+G/G)were significantly lower in the experimental than in the control subjects (P＜0.01).Variant genotype (A/G+G/G)was taken as an exposure factor,then OR=2.19 and 95% CI=1.16-4.13,indicating that in the high altitude environment,the exercise capacity in individuals with GSTP1-105 variant genotype was decreased by 1.19 times than that in individuals with GSTP1-105 wide type genotype.CONCLUSION:GSTP1-105 genetic polymorphisms correlate to human exercise capacity in the high altitude environment.Subjects with wide type genotype have exercise predominance.

Objective: To investigate the effect of prenatal tobacco and alcohol exposure on stature and neural development of offspring. Methods: Female mice were exposed to tobacco smoke and alcohol drink from D6 of pregnancy to parturition. The early physical development, neurobehavioral and antioxidative functions were measured in offspring mice. Results: Compared with control, offspring subjected to prenatal exposure showed significant reduced body and organ weights as well as reduced gestational body weight gain. It also resulted in remarkable prolonged neonatal reflexes and reduced motive, coordinative and locomotor activities. Step-down and Y-maze tests revealed marked destroyed memory and learning ability. Futhermore, MDA in offspring brain cytosol and mitochondria increased significantly and the activities of SOD, GSH-Px, CAT and GST were decreased. Conclusion: Prenatal tobacco and alcohol exposures interfere with the early physical and neural development in mice, probably related to decreased antioxidative functions.

Objective To investigate the efficacy of warfarin combined with urokinase in the prevention of deep venous thrombosis after hip replacement. Methods 58 patients undergoing hip replacement in our hospital from October 2014 to October 2016 were randomly divided into the observation group and the control group, 29 cases in each group. The control group were treated with oral warfarin, the observation group was treated with warfarin combined with urokinase, two groups of patients were treated for 14d, the incidence of lower limb deep vein thrombosis, follow-up statistics of two groups of patients within three months after operation, the diameter and blood rheology changes before and after weeks of treatment of lower extremity. Results During the treatment and follow-up of 14d patients in the control group, the incidence of deep venous thrombosis was 20.67% significantly higher than the observation group 3.45% (P<0.05); after treatment, the two groups of patients with lower limb circumference difference was significantly reduced (P<0.05), and the patients in the observation group the thigh circumference, calf circumference difference was significantly less than the control group (P<0.05); after treatment, the two groups of patients with high blood viscosity, low blood viscosity, plasma viscosity and hematocrit were significantly lower than those before treatment (P<0.05), and the indicators of the observation group were significantly lower than the control group (P<0.05). Conclusion Warfarin combined with urokinase can effectively prevent the formation of deep vein thrombosis of lower extremity after hip replacement, improve the hypercoagulability of patients and reduce the circumference of the lower extremity, so it is worthy of clinical application.

Metabonom ics is an im portant branch of system biology follow ing the developm ent of ge-nom ics, transcriptom ics and proteom ics. It can perform high-throughput detection and data processing with multiple param eters, potentially enabling the identification and quantification of all sm all m etabolites in a biological system . It can be used to provide com prehensive inform ation on the toxicity effects, toxi-cological mechanisms and biom arkers, sensitively finding the unusual m etabolic changes caused by poi-son. This article mainly review s application of m etabonom ics in toxicological studies of abused drugs, pesticides, poisonous plants and poisonous anim als, and also illustrates the new direction of forensic toxi-cology research.

Cervical spinal canal tumors is not rare,accounting for about 15%of all spinal tumors. Due to the particularity of its anatomical location and the severity of operative complications, it is considered as a difficult point in spinal surgery. With the development of imaging medicine and various surgical techniques,many new theories and techniques have been developed. Its overall treatment effect is satisfactory, but the serious surgical complications not rare. This article reviews the progress in treatment of cervical spinal canal tumors, in order to provide a reference for the further improvement of cervical spinal canal tumors treatment .

Objective To understand the quality of life of elders in the community of Shangqiu and analyze the affecting factors to provide a scientific evidence which could improve their quality of life.Methods The general questionnaire and World Health Organization Quality of Life Brief Evaluation From were used among 116 elders in two communities of Shangqiu.Results The quality of life of elders was in low level.The mainly factors that influencing the quality of life of elders in the community of Zhengzhou were age,education status,economic income,hobbies and interest,family relation,physical exercise.Conclusions The factors that influence the elders in community are various.To improve quality of life of elders,community workers should take relevant measures and encourage family members to participate in caring elders.

Objective To assess the impact of parents' occupational class and intergenerational occupational mobility on children's mental health so as to provide evidence for improving health equity.Methods Chinese general social survey 2005 (CGSS2005) dataset was used for multivariate analysis of variance (MANOVA).Results The proportion of children whose father or mother was of lowerclass occupation was 59.0％ and 62.9％,respectively.When grew up,this figure dropped to 49.8％.Those whose father was in the higher-class occupational group reported better mental health status (F =1.449,P=0.015).Downward occupational class mobility experience also increased the risk of mental illness (F =3.050,P =0.048).Conclusion This study suggests an independent relationship between mental health and parents' occupational class and intergenerational occupational mobility.

BACKGROUND:Deep venous thrombosis is one of the common and fatal complications of total joint arthroplasty.For our clinical practice,we require duplex ultrasound and venography to evaluate the presence of deep venous thrombosis,but the diagnostic tools have several disadvantages.OBJECTIVE:To explore the appropriate and non-invasive biomarkers in the early diagnosis of deep venous thrombosis.METHODS:With the key words of Thrombosis,DVT,Biomarker,Total Joint Arthroplasty,D-dimer,Factor VIII,Thrombin Generation,Fibrin Monomer,P-selectin,Inflammatory Cytokines,Microparticles,Leukocyte Count,Genetic factors,MicroRNAs,a computer-based search was performed for articles published in PubMed database from January 1995 to March 2015.After the initial screening,the reserved articles were further detailed,summarized and concluded.RESULTS AND CONCLUSION: Totaly 66 articles were colected.This brief review is used to analyze the mechanism of the biomarkers which are classified into three levels as folow: detection of blood coagulation,inflammation markers and molecular biology and genetics-based biomarkers.The review also showed a great need of economic and safer biomarkers for the clinic and provided the theoretical basis to diagnose and predict deep venous thrombosis in an early stage.

Objective To estimate the clinical effect of cutting titanium inlay crown in the restoration of short cracked molar. Methods Sixty-four short coronal cracked teeth were randomly divided into group A and group B. Group A were treated by crown. Group B were treated by titanium inlay crown. The curative effect was evaluated every year and lasted 2 years. Results One year after the repair, there was no significant difference in the achievement ratio between two groups (93.8%vs 100%,χ2=2.064, P>0.05). Two years after the repair, the success rate was significantly higher in group B (96.9%) than that of group A (68.8%,χ2=8.892, P<0.01). The failed cases of group A were treated by cutting titanium inlay crown, showing good retention. Conclusion The retention of a short cracked molar can be improved by means of cutting titanium inlay crowns.