OBJECTIVE:To investigate the possible mechanism of the neuroprotective action of isatin(ISA).METHODS:A total of 40 C57BL/6J mice were divided into 4 groups:control group,model group,ISA(200 mg?kg-1 intragastrically) group,and selegiline(0.5 mg?kg-1 intraperitoneally) group.After pretreatment with drugs for 10 days,the latter 3 groups were given 1-methyl-4-phenyl-1,2,3,6-tetrahyrdropyridine(MPTP) intraperitoneally to establish Parkinson's disease(PD) model,then the mice were put to death for the determination of the activities of MAO-B,SOD and GSH-px in blood serum and brain tissue.RESULTS:As compared with blank control group,the activity of MAO-B in model group increased slightly,while the activities of SOD and GSH-px decreased(P

ObjectiveTo investigate the possibility of establishing a model of connective tissue disease-associated pulmonary arterial hypertension (PAH) in rats.MethodsPAH was induced by a single intraperitoneal injection of monocrotaline solution at a dose of 50 mg/kg.The rats of the control group were injected the same volume of 2:8 ethanol saline.After 2 and 4 weeks,a polyvinyl catheter was inserted into the pulmonary artery,and the hemodynamic variables were monitored continuously by Maclab/8 s.The pulmonary vascular pathologic remodelling was examined with hematoxylin and lectin perfusion.Thickness and area indices were calculated.ResultsFour weeks after intra-peritoneal injection of monocrotaline,the systolic,diastolic,and mean pulmonary arterial pressures [(41 ±6),(24.3±3.8),(29.8±4.2) mm Hg] were obviously increased in the experimental group [(23 ±3),(8.5 ±2.4),( 17.1 ±2.5) mm Hg] (P＜0.05) when compared with those of the control groups.Histological examination showed that the thickness of arterial wall increased,the lumen became narrowed,and the thickness and area index(TI:0.723±0.034 vs 0.314±0.023,AI:0.912±0.203 vs 0.414±0.021 ) increased in small pulmonary arteries(P＜0.05).ConclusionThe model of connective tissue disease-associated pulmonary hypertension could be established by intraperitoneal injection of monocrotaline solution.The model has been demonstratedthe characteristic morphologic changes in the pulmonary vasculature.This method may provide an economic,easy,and stable animal model for the study of the mechanisms of pulmonary vascular remodeling in connec-tive tissue disease-associated pulmonary hypertension.

Objective To prepare the recombinant epitopes of HSV-gB and HSV-gD protein and provides a new antigen protein for the development of herpes simplex virus(HSV)vaccine.Methods The epitopes of HSV-gB and HSV-gD protein were analyzed by epitope prediction software.A novel gene named X which encoded 9 predicted epitopes of HSV-Gb and HSV-gD protein was designed and synthesized using chemical method.X gene was cloned into vector PET-28a(+),expressed in Escherichia cob' BL21(DE3),and analyzed by Western blot.Results X gene was successfully designed and expressed in Escherichia coli BL21(DE3).Western blot analysis showed that recombinant X protein,which was with His marker,can be detected by anti-His antibody.Conclusion In this study we establish a newmethod to express recombinant epitope protein,which may be a new protein for developing vaccine against HSV infection.

Aspirin can effectively prevent ischemic cerebrovascular disease. However, as the existence of "aspirin resistance" phenomenon, ischemic events still occur in some patients during the aspirin treatment. This article mainly reviews the mechanisms, screening methods and treatment measures of aspirin resistance.

To comparative study the effect of polysaccharide sulfate (PSS) and amlodipine on renal hemodynamics in dogs. The kidney was denervated, PSS or amlodipine was injected through renal artery. Renal hemodynamic parameters, including mean arterial pressure, renal blood flow, glomerular filtration, urine flow, et al, were measured. Both PSS and amlodipine significantly increased renal blood flow and urine flow (P

Objective To evaluate the clinical outcomes of treating Freiberg's disease with dorsal wedge osteotomy and Charlotte breakage screw fixation.Methods From June 2010 to June 2014,11 patients with Freiberg's disease were treated at our department.They were 5 males and 6 females at an average age of 32 years(range,from 15 to 52 years).X-ray revealed osteosclerosis and collapse of the metatarsal head.According to Smillie classification system,there were 5 cases of stage Ⅱ and 6 ones of stage Ⅲ.The duration of symptoms was from 7 to 48 months (average,23 months).The metatarsal heads were rotated to reconstruct the joint surface.After dorsal closed V-shaped osteotomy,Charlotte breakage screws were implanted.Results All wounds healed with no complications in the early postoperative period.The 11 patients were followed up for 14 to 48 months (average,19 months),showing obvious pain relief.X-ray showed that the osteotomy sites got solid union in all patients at an average time of 10 weeks (range,from 8 to 13 weeks) after operation.Average shortening of the metatarsal was 1.5 mm (range,from 1.1 to 1.8 mm).The American Orthopaedic Foot and Ankle Society(AOFAS) score,Lesser Metatarsophalangeal-Interphalangeal Scale(LMIS) score,and range of motion at one day,one month and one year after operation were significantly improved compared with the preoperative ones (P ＜ 0.05).Significant differences were also observed between all postoperative time points (P ＜ 0.05).No such complications happened as referred pain from the adjacent metatarsophalangeal joint,displacement,nonunion,necrosis or infection.All patients returned to sports and recreational activities at 6 months after operation,except one case of stage Ⅲ who had constant swelling in the metatarsophalangeal joint but eventually recovered at 10 months after operation.According to patients' satisfaction at the last follow-ups,including 7 cases were excellent,3 good and one poor.Conclusion Dorsal closed V-shaped osteotomy with Charlotte breakage screw fixation is an effective procedure for Freiberg' s disease of stages Ⅱ and Ⅲ,because it leads to effective reconstruction of the metatarsophalangeal joint,allows early joint motion and avoids a second operation.

Bibliometrics ; Biochemistry ; Biotechnology ; China ; Journal Impact Factor ; Periodicals as Topic ; statistics & numerical data ; Science

Objective To evaluate the therapeutic effectiveness and safety of endoscopic submucosal dissection (ESD) with improved snare for colorectal polyps and submucosal tumors.Methods The clinical data such as clinical pathological characteristics, en bloc resection rate, curative resection rate, complications and follow-up results of 20 patients with colorectal polyps or submucosal tumors, who were treated by ESD, were retrospectively analyzed.Results 20 patients (total 24 lesions) with colorectal polyps or submucosal tumors were performed ESD operation successfully, in which 16 cases (total 20 lesions) were treated by ESD with improved snare (the trial group), 4 cases were treated by ESD with HOOK knife (the control group).The surgical success rate was 100.0% (24/24), the en blot resection rate was 100.0% (24/24). The mean polyps diameter in the trial group was (2.4 ± 0.9) cm (1.2~4.0 cm), while that in the control group was (2.2 ± 0.6) cm (1.5~3.0 cm). The mean procedure time in the trial group was (83.3 ± 23.9) min (45.0~120.0 min), while the control group was (66.2 ± 15.4) min (45.0~80.0 min), compared with the control group, the trial group need more times to complete the operation. The postoperative pathology as follows: 15 cases were adenoma (including 3 cases of adenoma with partial gland high-grade intraepithelial neoplasia), 1 case was hyperplastic polyp, 1 case was high-grade intraepithelial neoplasia, 2 cases were neuroendocrine tumor (total 4 lesions) 1 case was stromal tumor. Except for 1 case of stromal tumor from the muscularis propria was taken full thickness resection, no patient appeared complications such as hemorrhage, perforation, infection. No patient need intraoperative and postoperative surgical treatment.Conclusion Improved snare can be used to endoscopic submucosal dissection for large colorectal polyps and submucosal tumors safely and effectively, expanded the use and indications of snare in endoscopic resection, but need more times to completed the operation.

Objective Through the research on relationship between achievement motive and personality traits,to provide the basis theory of personality attributes for selecting outstanding medical professional scientifically and effectively,and give some advice for improving medical education mode.Method The 310 medical staffs in sample hospital were treated as the research object in October 2015,who were randomly investigated with the big five personality questionnaire and achievement motivation scale,among of which,valid questionnaires were 290 copies leading to 93.5％ effective rate.SPSS 17.0 software was used to make t test,Chi-square analysis and correlation analysis for the data of the recover valid questionnaires.Result ①Personality traits of friendliness and rigor of the medical staffs of different gender exist statistically significant difference (t=-7.39,P=0.00;t=-8.28,P=0.00) and there were significant differences in the openness and rigor of medical staffs of different gender (P＜0.05).②The achievement motivation level of male medical staffs was higher than that of female (P=0.00),and there was no significant difference in achievement motivation among medical staffs.③The personality trait of neuroticism was negatively correlated with the pursuit of success and achievement motivation (correlation coefficient was-1.24),while the achievement motivation was positively related to extraversion and openness and the pursuit of success (the correlation coefficients were 1.51 and 1.53).Conclusion There is a significant correlation between personality traits and achievement motivation.The more extroverted personality medical staffs have,the more easy-going they are,and the more the pursuit of success oriented achievement motivation they have;and the higher the neurotic tendency individuals have,the more they incline to avoid failure of achievement motivation.

Using the WISC R to judge two groups childrens IQ and the structure of intelligence. The test group included 47 children studied in special educational primary school (24 girls, 23 boys, aged from 8-11 years). The control group included 50 normal children (25 girls, 25 boys, aged from 8-11 years). All children were required to perform CATEGORY TEST. The result showed that there were significant differences in IQ between two groups. The IQ in the test group ranged from 46 69. So they could be diagnosed as Mental Retardation (MR). 14 MR children were out of balance between VIQ and PIQ. One child's PIQ was over 2SD higer than his VIQ. But the intelligence structures were very similar in two groups. There were siginificant differences on Category Test between two groups, and the result of Category Test was highly related to IQ (r=0.65). This indicated that Category Test could be used to test the thinking development of children.