Objective To investigate the approaches and effect of Ilizarov external fixators combined with limited operation in treatment of posttraumatic clubfoot in children.Methods The study involved 40 cases (43 feet) of posttraumatic clubfoot treated with Ilizarov external fixators combined with limited operation including soft-tissue releases (26 cases,28 feet) or osteotomies (14 cases,15 feet)from January 2006 to June 2012.Scoring system of intemational clubfoot study group (ICFSG) including aspects of functional assessment (36 points),morphology (12 points) and radiological assessment (12points) were employed before and after surgery.Results All the cases were available to the follow-up of 0.5-6 years.ICFSG score was excellent in 28 feet,good in 10,fair in four and poor in one foot,with excellent-good rate of 88％.This suggested the good correction of posttraumatic clubfoot,satisfactory weight-bearing exercise and a low relapse rate.Conclusions Conservative open operation brings large trauma and poor results in treatment of posttraumatic clubfeet in children,while Ilizarov invasive distraction technique is probable to offset those weak points.Therefore,Ilizarov external fixators combined with limited operation is an effective treatment.

Objective To compare the effects of health education on fat intake behavior and its psychology in students with different BMI,provide evidence for improving individual healthy education.Methods A experimental epidemiology was used,Twenty-nine secondary school classes were randomly selected by multi-stage cluster sampling from two cities in Zhejiang province.Overweight or obesity group included all students who were judged overweight or obesity,normal group included students who were judged normal and basic matched by age,grade,sex and stage of baseline.Intervention based on transtheoretical mode was conducted on two groups and intervention results were measured by the adolescent fat intake behavior of psychological measurement scales (Chinese version).Chi-square tests,T-tests,non-parameters tests and binary logistic regression were performed for data analyses.Results Stage of students with overweight or obesity and with normal BMI all moved forward after intervention,while the proportion of stage advance for students with overweight or obesity was further than students with normal BMI.Change strategy(2.60±0.79),pros(3.58±0.90) and self-efficacy(3.01±0.72) of students with overweight or obesity better than students with normal BMI in baseline((2.34±0.86),(3.08±0.91),(2.79±0.81)) while difference was not significant after intervention.Logistic regression analysis discovered that the promotion of change strategy moved stage forward for students with normal BMI(OR=2.168,95％ CI:1.560-3.014)and promotion of self-efficiency moved stage forward for students with overweight or obesity (OR=1.801,95％ CI:1.026-3.159).Conclusion The intensity and duration of psychological intervention is essential to be reinforced for students with normal BMI,while for students with overweight and obesity,psychological intervention should be promoted in combination with social support.

Objective:To evaluate the immunogenicity of an experimental SARS-CoV inactivated vaccine.Methods:The virus suspension of F69 strain was inactivated with 0.4% formaldehyde and purified,then used as the immune antigen combined with Freund′s adjuvant.Eight adult New Zealand rabbits were immunized 4 times with this vaccine.12 sets of rabbit serum were sampled from the third day to 74th day after first immunization.Titers of specific IgG antibody and neutralizing antibody were determined by indirect ELISA and micro-cytopathic effect neutralizing test.Results:Rapid and potent humoral immune responses were induced by F69 inactivated vaccine in all eight immunized rabbits.Both specific IgG antibody and neutralizing antibody all peaked just with 2 vaccinations,with the maximum titer of 1∶81 920 and 1∶20 480 respectively about 6 weeks after first immunization.Across neutralizing reaction existed between F69 and Z2-Y3 strains.Conclusion:F69 inactivated vaccine owns strong immunogenicity.Similar antigenic epitopes exist between the F69 strain and Z2-Y3 strain,which ensured the cross neutralizing reaction.

BACKGROUND:J2 takes functional domain (MHC CD4-D1/) of complex conjugate of CD4 molecule and MHC class II molecule as a target, and is a smal molecule compound obtained by computer screening from a chemical data containing hundreds of thousands of organic compounds. In the previous study, J2 was used in mouse models of skin transplantation and keratoplasty by oral and intraperitoneal injection. Results verified that J2 could prolong the survival time of grafts, and suppress occurrence of rejection. To better play the role of a drug targeting and to reduce systemic toxicity, J2 wil be further utilized in local treatment of keratoplasty rejection. OBJECTIVE:To investigate the inhibitory effect of new immunosuppressive agent J2 on CD4+ and CD8+T cel immune functions in rat models receiving alogenic penetrating keratoplasty. METHODS:Alogeneic penetrating keratoplasty model was established using the adult female Wistar rats as donors and Sprague-Dawley rats as recipients. Group A: normal Sprague-Dawley rats were injected with 0.05 mL placebo subconjunctivaly. Surgery rats were randomly divided into three groups. Group B: alograft rats were injected with 0.05 mL placebo subconjunctivaly after autologous keratoplasty. Group C: alograft rats were injected with 0.05 mL placebo subconjunctivaly. Group D: alograft rats were injected with 1% J2-nanosuspension 0.05 mL subconjunctivaly. The distribution of T cel subsets in peripheral blood was detected using flow cytometry at 3 days, 1, 2 and 3 weeks after transplantation and compared among groups. RESULTS AND CONCLUSION: There was no significant difference in total CD3+ T cels, CD4+ T cels, CD8+ T cels and CD4+/CD8+ in peripheral blood lymphocytes in group B at various time points. At 3 days and 1 week after surgery in group C, no significant difference in total CD3+ T cels, CD4+ T cels and CD8+ T cels was detected. At 1 and 2 weeks, the number of total CD3+ T cels, CD4+ T cels and CD8+ T cels increased, showing significant differences (P < 0.05). In group D, no significant hyperplasy was found in CD4+ T cels and CD8+ T cels at 1 and 2 weeks. The horizontal comparison of the same time point: the total CD3+ T lymphocytes of group D was significantly less than group C at 3 days, 1 and 2 weeks after operation (P < 0.05), whereas there was no significant difference at 3 weeks between the group D and group C. The number of CD4+ T lymphocytes in group D was less than in group C at 3 days and 1 week, but with no significant difference. The ratio of CD4+/CD8+ had no significant difference in group D compared with group C at 3 days, 1 and 3 weeks. J2 inhibits T lymphocyte proliferation and then inhibits T cel-mediated corneal alograft rejection.

Objective To evaluate the relationship between interleukin-18(IL-18) and insulin resistance, measured by euglycemic hyperinsulinemic clamp, in women with polycystic ovary syndrome (PCOS). Methods Forty-two young women with PCOS and 38 age-and body mass index (BMI)- matched control women were recruited in this study. A complete hormonal assay was performed and serum IL-18 level was determined in each subject. And euglycemic hyperinsulinemic clamp test was completed in 41 of the above subjects. Results Serum IL-18 levels were increased in the PCOS women, as compared with the control (P=0.033). When all subjects were divided into lean and obese groups, the IL-18 levels were slightly increased in the obese subjects (P=0.902). IL-18 levels were negatively correlated with all the clamp parameters [mean glucose infusion rate (M), M-to-insulin ratio (M/I) and glucose metabolic clearance rate (MCRg), r =-0.419,-0.396,and-0.405,P=0.006,0.010 and 0.009 respectively], but were positively associated with HOMA-β index(r=0.334, P=O.035). Conclusion Serum IL-18 level was significantly increased in PCOS women and was strongly associated with the parameters obtained from the euglycemic hyperinsulinemic clamp, indicating that IL-18 may be an important mediator between inflammation and insulin resistance.

AIM: To study the pathological change in mouse organs immunitied by inactivated SARS-CoV vaccine. METHODS: Inactivated SARS-CoV vaccine was injected into BALB/c and C57BL/6 mice. Anti-SARS antibody was analyzed by ELISA. After 8 weeks, the immunitied mice were killed and those organs were analyzed by pathological methods. RESULTS: Anti-SARS antibody in mice was positive after 8 days. Only minimal injury was observed in a few lungs and livers, but the other organs were not. CONCLUSIONS: Inactivated SARS-CoV vaccine induced mice to create antibody, whereas they did not cause severe injury. This result will be valuable for vaccine into clinical research. [

To investigate the influence of Angelica Four Inverse Decoction on diabetic peripheral neuropathy (DPN) nerve conduction velocity and advanced glycation end products (AEGs), Cystatin C (Cys-C) and homocysteine (Hcy) levels, 78 cases of DPN patients admitted in our hospital from March 2015 to January 2017 were selected and divided into two groups by random number table method. The two groups adopted the same basic treatment, on the basis of which, the control group was added mecobalamin tablets treatment, while the observation group was given Angelica Four Inverse Decoction. The curative effect of Chinese medicine syndrome, the scores of toronto clinical scoring system (TCSS), nerve conduction velocity and the change of serum AEGs, Cys-C and Hcy levels before and after treatment were recorded and compared between the two groups and then the safety of medicine were evaluated between the two groups. 4 weeks after the treatment, the total effective rate of the observation group was 89.7％, significantly higher than 71.8％ of the control group (P ＜ 0.05) . Compared with those before receiving treatment, the SNCV and MNCV values of the common peroneal nerve and median nerve both significantly increased in the two groups 4 weeks after the treatment (P ＜ 0.01); the improvement of nerve conduction velocity of the observation group was significantly better than that of the control group (P ＜ 0.01) . 4 weeks after the treatment, TCSS score and serum AEGs, Cys-C, Hcy levels were all significantly lower than those before receiving the treatment in the two groups (P ＜ 0.01); compared with that of the control group in the same time period, the improvement effect of TCSS score and serum AEGs, Cys-C, Hcy levels were more significant in the observation group 4 weeks after the treatment (P ＜ 0.01) . There were no obvious adverse reactions in the two groups. As a result, Angelica Four Inverse Decoction applied to DPN patients can more effectively relieve clinical symptoms and signs, improve nerve conduction velocity, reduce the level of AEGs, and improve microcirculation with remarkable curative effect and high safety.

The receiver operating characteristic(ROC) curve analysis has been widely used in the evaluation of screening validity in Epidemiology and in determining the optimal operating point. At present, theories about ROC curves and computation methods have been established mainly based on cross-sectional data. It is important to understand the characteristics and the progress of ROC application in order to explore more researches on optimal cut-off value, which could also give suggestions on non-communicable diseases (NCD) prevention and control. This study reviewed the application of ROC curve analysis and softwares in NCD and pointed out the future work.

The receiver operating characteristic(ROC) curve analysis has been widely used in the evaluation of screening validity in Epidemiology and in determining the optimal operating point. At present, theories about ROC curves and computation methods have been established mainly based on cross-sectional data. It is important to understand the characteristics and the progress of ROC application in order to explore more researches on optimal cut-off value, which could also give suggestions on non-communicable diseases (NCD) prevention and control. This study reviewed the application of ROC curve analysis and softwares in NCD and pointed out the future work.

Objective To optimize the preparation process of hydroxysafflor yellow A(HSYA)nanoparticle and conduct in vitro release evaluation.Methods HSYA nanoparticles were prepared with PLGA as carrier by modified compound emulsion method.The optimal preparation process of the experiment was selected by Plackett-Burman and Box-Behnken response surface method.The nanoparticles were characterized by using particle size analyzer,TEM scanning electron microscope,Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD).Frozen(4℃)storage stability,stability in physiological medium,lyophilized protective agent and in vitro release rate were investigated.Results The optimal process prescription of nanoparticle is as follow:pH value is 6.95,the dosage is 2.8 mg,and carrier dosage is 18.2 mg.The size of nanoparticles obtained at optimum condition is(176.4±1.29)nm,the polydiseperse index(PDI)is 0.152±0.014,the Zeta potential is(-17.6±0.46)mV,the encapsulation rate is(78.5±0.49)％,drug loading is(7.3±0.07)％.These nanoparticles showed round and good dispersion.Good stability in 4℃ storage environment and different physiological media of nanoparticles were observed.The best lyophilized protective agent was 1％glucose and the in vitro release rate of nanoparticles at 48 hours was 85％.Conclusion The optimization method is reasonable and reliable.The obtained nanoparticles have good stability and sustained-release effect.The in vitro release behavior conformed to first-order kinetic model.