Polymyositis (PM) and dermatomyositis (DM) are inflammatory myopathies and slowly advanced of unknown etiology that affect the skeletal muscles.With the advancement of the constant research on the disease and use of new technology,people have a penetrating realization about the pathogenesis. The disease is thought to be associated with autoimmune as well as nonimmune mechanism. By now, there is no overall summary on the newest advancement of the pathogenesis.We summarized the progress on the pathogenesis of the disease in order to make it more clear to physicians.

Diabetic retinopathy is a progressive vision-threatening complication of diabetes mellitus.The characters of diabetic retinopathy in clude capillary occlusion,microcirculation disturbance and retina neovascularization near ischemic areas of the retina.The exact pathogenic mechanism is still unclear.Recent studies showed that it may be related to vascular inflammation of the retina.Cytokines can cause induction of proinflammatory and adhesion molecules and thereby increase monocyte-endothelial cell adhesion,which is now accepted as the early key event in the development of diabetic retinopathy.The functions of many cytokines such as vascular endothelial growth factor,transforming growth factor-β,basic fibroblast growth factor and ideas for medicine therapeutic to diabetic retinopathy are summarized in this review.

Objective To investigate the expressions of VEGF and Ang-1 in neonatal rats with hyperoxia-induced BPD and its effects on lung development. Methods 48 SD neonatal rats (2 or 3 days old) were randomly divided into two group and raised under hyperoxia or air for 1, 3 and 7 days, respectively. Real-time RT-PCR and Western blot were used to determine the level VEGF and Ang-1 mRNAs and proteins in lung tissues of the two groups. HE staining was used to observe the changes of lung morphology. Results The levels of VEGF and Ang-1 mRNAs in the lung on the 7th day in the control group were 0.722 ± 0.372 and 0.828 ± 0.462, respectively, and those in hyperoxia group were 0.239 ± 0.293 and 0.327 ± 0.184 , respectively. The levels of VEGF and Ang-1 proteins on the 7th day in the control group were 0.632 ± 0.289 and 0.573 ± 0.436, respectively, and those in hyperoxia group were 0.358 ± 0.128 and 0.204 ± 0.068 , respectively. Comparing to the control group , the levels of VEGF and Ang-1 mRNAs and proteins on the 7th days significantly decreased in the hyperoxia groups (P<0.05). The lung tissues of the hyperoxia group display dysplastic features with , alveolar simplification , reduced alveolar numbers and retardation on microvascular development. Conclusion VEGF and Ang-1, functioning as an important regulators for pulmonary vascular development , are involved in the pathogenesis of BPD and the lung development.

Objective To study the application of problem-based learning in combination with simulating teaching in clinical probation of gynecology and obstetrics. Methods The patten of problem-based learning in combination with simulating teaching was applied to experimental group,and the traditional teaching pattern to control group. The teaching effects were evaluated by evaluation of teacher,questionnaire after class and examination. Results Satisfaction ratio of experimental group was significantly higher than that of control group in questionnaire after class. The fine ratio of experimental group was significantly higher than that of control group in written history and case analysis; but there was no significance in excellence ratio and pass ratio. There was no significance in pass ratio ,fine ratio and excellence ratio of finals between them. Conclusion The application of problem-based learning in combination with simulating teaching in clinical probation of gynecology and obstetrics can develop students'ability to practice and improve the quality of class teaching.

Objective The aim of this study was to explore the association of tumor necrosis factor-α (TNF-α)promoter-308A/G polymorphism with rheumatoid arthritis(RA)susceptibility in East Asian population based on the meta-analysis. Methods We searched all the publications about the association between TNF-α promoter -308A/G polymorphism and RA in East Asian population from PubMed, Ebsco, Chinese Biomedical Literature Database(CBM), Chinese National Knowledge Infrastructure(CNKI), and Wanfang (Chinese). Meta-analysis was performed for genotypes AA versus GG, GA versus GG, AA versus GG+GA,GA+AA versus GG, and A allele versus G allele in a fixed/random effect model. Results A total of 4 studies (957 cases and 1196 controls)were included in the current meta-analysis(three Chinese and one Japanese studies). When all groups were pooled, significant association of A allele and decreased RA risk was found (OR=0.36, 95%CI=0.16～0.80, P=0.01). When analyses were limited to race homogeneous population,significant association of A allele and decreased RA risk was found in Chinese population(OR=0.40, 95%CI=0.16～1.01, P=0.05). Conclusion This meta-analysis demonstrates significant negative association between TNF-α promoter-308A/G polymorphism and RA in East Asian and Chinese population.

Continuous blood purification therapy, one of the most popular multiple organ protection and life support technology, has been widely used in the treatment of critical illness.After the initial introduction of the concept of dialytrauma or CRRT trauma in 2012, the related complications are getting more and more attention.The loss of heat caused by CBP may lead to hypothermia.Howev-er, to critically ill patients, controversy still reigns on the influence of this issue.There is no guideline developed through clinical prac-tice to define such issue.This article reviews the methods as well as results of related clinical studies to discuss how to manage the hy-pothermia during CBP.

Objective:To quantitively detect TfR gene expression of human white blood cell before and after iron supplementation. Methods:Before and after iron supplementation,10 healthy women were phlebotomized separately,and the real-time fluorescence quantitative PCR method was used to analyze the expression difference of TfR gene in human white blood cell. Results:TfR gene expression decreased after iron supplementation in 10 women,more evidently in 7 cases,where the expression level was half less than before iron supplementation. Conclusion:TfR gene expression of human white blood cell could be quantitatively measured by FQ-PCR,and was decreased after iron supplementation in 10 women. It explained that the regulative mechanism of TfR mRNA expression by iron is also suitable to white blood cell.

Objective To establish the quality standard for Zaizao Nongsuo Wan. Methods Artificial Calculus Bovis, Radix Paeoniae Rubra, Rhizoma Coptidis and Herba Ephedrae were identified by TLC. The content of Muscone was determined by GC. Results Under the selected conditions, the clear and distinguished spots were obtained. For content determination, the linear range of Muscone was 0.101 2 ? g～ 1.012 ? g, r=0.999 9, the average recovery was 99.11 % ( n=5) and RSD was 3.59 % . Conclusion The methods are proved to be simple, specialization with a good reproducibility, and can be used to control the quality of Zaizao Nongsuo Wan.

The aim of this study was to explore the effect of small hairpin loop RNA (shRNA) silencing hypoxia-induced factor 1alpha (HIF-1alpha) gene on the expression of vascular endothelial growth factor (VEGF) and pigment epithelium derived factor (PEDF) in human retinal pigment epithelium (RPE) cells under hypoxic condition. Two target sites of HIF-1alpha mRNA were chosen and two kinds of shRNA were designed and synthesized against the target sites. Then the two kinds of shRNA were transfected into human RPE cells in vitro, respectively. These cells were cultured under hypoxic condition that was simulated by using 150 mumol/L CoCl(2). The mRNA expressions of HIF-1alpha, VEGF and PEDF were tested by semi-quantitative reverse transcription PCR (RT-PCR). The protein levels of HIF-1alpha, VEGF and PEDF were analyzed by Western blotting. After the two kinds of HIF-1alpha-specific shRNA were transfected into RPE cells respectively, the expression of HIF-1alpha mRNA and the levels of HIF-1alpha protein were decreased significantly in RPE cells under hypoxic condition. The expression of VEGF mRNA and the levels of protein significantly were also decreased. However, the levels of PEDF protein was significantly increased, but the expression of PEDF mRNA showed no significant changes. In conclusion, HIF-1alpha-specific shRNA can effectively silence the HIF-1alpha gene, and consequently down-regulate VEGF and up-regulate PEDF expression against hypoxia. These results reveal that HIF-1 is associated with posttranslational mechanism for down-regulating PEDF under hypoxia and provide an explanation for hypoxia-provoked increases in VEGF/PEDF ratios. These results also suggest that HIF-1 is one of the key cytokines to retinal neovascularization.

In order to explore the effect of high glucose concentration and high glucose concentration with hypoxia on the production of hypoxia-inducible factor-1alpha (HIF-1alpha) and vascular endothelial growth factor (VEGF), human RPE cells were cultured in 5.56 mmol/L glucose (control group), 5.56 mmol/L glucose with 150 micro mol/L CoCl2 (hypoxic group), 25 mmol/L glucose (high glucose group) and 25 mmol/L glucose with 150 micro mol/L CoCl2 (combination group). RT-PCR was used to detect the expression of HIF-1alpha and VEGF mRNAs. Western blot analysis was used to measure the levels of HIF-1alpha and VEGF proteins. Although the small amount of HIF-1alpha protein was able to be detected in high glucose group but not in control group, there was no significant difference between the expression of HIF-1alpha mRNA of RPE cells in high glucose group and that of RPE cells in control group. As compared with RPE cells in control group, the mRNA expression and the protein synthesis of VEGF in high glucose group were up-regulated. As compared with RPE cells in hypoxic group, the expression of HIF-1alpha mRNA of RPE cells in combination group was not different, but the protein synthesis of HIF-1alpha, the mRNA expression and the protein synthesis of VEGF were more obviously up-regulated. In conclusion, high concentration glucose mainly influence the protein synthesis of HIF-1alpha of RPE cell, and HIF-1alpha protein is able to be accumulated in high concentration glucose. Under hypoxia, the HIF-1alpha protein induced by high concentration glucose is more stable, and the expression of VEGF is obviously increased. It is suggested that high concentration glucose may play a role in retinal neovascularization, especially at ischemia stage of diabetic retinopathy.