The severity of carotid atherosclerosis and the levels of serum matrix metalloproteinase-9(MMP-9)in patients with obstructive sleep apnea syndrome(OSAS)increase with the severity of apnea,and that MMP-9 plays an important role in the progression of carotid atherosclerosis.This article reviews the relationship between carotid atherosclerosis and serum MMP-9 so as to analyze the possible mechanism of developing carotid atherosclerosis in patients with OSAS.

Objective To understand the expression of heat shock protein(HSP70) mRNA induced by avermectins in the hepatic tissue of rats.Methods Wistar rats aged 6 weeks were randomly divided into 4 groups,12 in each including 6 male and 6 female.The rats in the experimental groups were treated with avermectins by gavage once a day at the doses of 2.5,1.25 and 0.625 mg/kg respectively for 14 consecutive days,one group was the negative control.The general state was concerned and after the exposure,the content of total protein(TP) in the serum was determined,the hepatic tissue was sampled to examine the expression of HSP70 mRNA by polymerase chain reaction(PCR).Results The content of TP in the serum in the 2.5 mg/kg group was lower than that in the control group(P

[Objective] To evaluate the results of surgical treatment of developmental dislocation of the hip (DDH) in children aged from 12 to 18 months. [Methods]A total of 59 patients (72 hips with developmental dislocation) were treated surgically from 2004 to 2006.In them, 53 hips received open reduction and Salter innominate osteotomy, 19 hips received open reduction and Pemberton transiliac osteotomy.[Results]All patients had been followed up for 50 months in average after operation. According to the modified McKay clinical criteria,Severin radiographic classification and Salter AVN diagnostic criteria,the excellent to good rate for Severin classification and modified McKay criteria were 94.4%、93% respectively.Avascular necrosis of the femoral head occured in 2 hips(2.8%).[Conclusion]Surgical treatment without preoperative traction is feasible for the management of DDH in children aged from 12 to 18 months.

Objective To study the change law between deficiency of kidney-Yang and stagnation of blood, and supply a study evidence for the therapy method of invigorate the kidney and promoting blood flow. Method 37 Wistar rats which were made of the model of deficiency of kidney-Yang, were randomly divided into three groups:control group, model group and treatment group. Changes including appearance, general objective sign, organ weight, microcirculation and blood rheology were recorded. Result Phenomenons, including rare fur, depression, lazy, duck stools and purpl dim in micrangium micrangium, occurred in model group. The weight of adrenal body and seminal vesicle and the contents of serum andrusol in model group were lower than those in control group. And in model group, significant increasing TC and LDL-C and decreasing HCL-C were observed. Conclusion Deficiency of kidney-Yang is associated with stagnation of blood, and the time delay of stagnation of blood can lead deficiency of kidney-Yang.

Objective 5-azacytidine could induce the diffcrentiation of stem cells into cardiomyocytes (CMs). The aim of this study was to screen the optimal condition for 5-azacytidine inducing differentiation of human mesenchumal stem cells (hMSCs) into CMs, and the effect of 5-azacytidine on adherence, cell vigor and chromosome karyotype ofhMSCs. Methods hMSCs were isolated from human bone marrow and cultured in vitro. The phenotypes ofhMSCs were identified by flow cytometric analyses. MTT test was used to investigate the effect of different concentrations of 5-azacytidine on proliferation ofhMSCs. Four weeks after 5-azacytidine induction, semi-quantitative RT-PCR, transmission electron microscopy (TEM), single-cell action potentials, detection ofcardio-cnzyme AST and LDH, cell adherence, cell viability and chromosome karyotype test were performed. Results The typical morphological features of hMSCs were fibroblast-like in shape, hMSCs expressed CD44 and CD105,and did not express CD34, CD45 and CD31. The optimal concentration of 5-azacytidine was 10μmol/L. The shape ofhMSCs treated with 5-Azacytidine changed from fusiform to polygon or astrocyte gradually, and passaged cells were evenly arranged as polarity structure. Induced-hMSCs connected with neighbouring cells, forming myotube-like structures 4 weeks later. It was confirmed that induced hMSCs shaped myotubule-like structure and had some of micro-histologic structures of CMs by TEM. RT-PCR showed that induced hMSCs expressed cardiac specific product BNNP and early cardio-myogenesis specific transcription factor NKX2.5mRNA. Besides, induced-MSCs led to the weak action potential and secreted cardio-enzyme AST and LDH. There was no significant difference in cell adherence and viability before and after induction. Both hMSCs and induced-hNSCs kept stable normal diploid nucleus. Conclusion The optimal condition for inducing effect of 5-azacytidine is 10 μ mol/L and 24-hour incubation; and under this condition, the adherence, vigor and chromosome karyotype ofhMSCs would not be affected.

Objective To study the therapeutic value of a second ERCP for the patients with failure of pre-cut ERCP.Methods A total of 167 cases of pre-cut ERCP failure were recruited to the study,among which 109 cases were diagnosed as common bile duct stones and/or benign papillary stenosis,and 58 cases as biliopancreatic lesion.ERCP failed with standard intubation for more than 20 minutes,even with pre-cut or fenestration.A second ERCP was preformed after rest of 3-5 days.The position sequence of intubation for most patients was horizontal,the front and rear.Results The success rate was 79.6％ (133 cases) for the patients with a second ERCP,85 patients received the procedures via the horizontal intubation,36 via anterior,and 12 via posterior intubation.The treatments were performed after successful completion of the endoscopic cannulation.One patient had retroperitoneal infection with duodenal perforation,another patient had severe pancreatitis,who were cured by the intervention methods.Conclusion The success rate of a second ERCP is high with proficient intubation skills.

Objective: To optimize and evaluate the modified RNA-tailing and primer-extension RT-PCR method in relative quantification of microRNAs (miRNAs) in several kinds of tissues. Methods: Small-sized RNAs (

Objective To confirm the expression and localization of COX-2 gene in mature rat testis,as COX-2 not only plays a central role in inflammation by up-regulating the synthesis of prostaglandins,but also mediates critical reproductive functions by other mechanisms. Methods In the mature Wistar rats,COX-2 expression and its localization were examined by using immunohistochemistry,RT-PCR and Western-blot. Results The results of RT-PCR and Western-blot showed that COX-2 mRNA and its protein exist in the testis. Expression of COX-2 was localized in spermatogenic cells on immunohistochemical study.No COX-2 expression in sertoli cells and leydig cells was found. Conclusions The present study confirmed the expression of COX-2 in rat testis and its localization in spermatogenic cells.These suggest that COX-2 may play a role in spermatogenesis.

This study is to investigate the effects of ceramide on GSTA1 expression in Caco-2 cells. After being exposed to ceramide for a fixed time, GSTA1 protein expression was detected by Western blotting analysis; GSTA1 mRNA expression was detected by real time PCR; dual luciferase assay was used to analyze GSTA1 transcriptional activity and GSTA1 activity was determined toward androstanedione (AD) as substrate. The data showed that ceramide can significantly induce the expression of protein and GSTA1 mRNA, and increase transcriptional activity and enzyme activity of GSTA1. The results demonstrated that ceramide may increase resistance to chemotherapeutics in Caco-2 cells by up-regulating the expression of GSTA1.

Objective To explore the application of experienced teaching method in the teaching of Fundamentals of Nursing.Methods The feasibility and validity of experienced teaching method was evaluated by expounding the utilization and result of role-play method and practice experienced method.Results The experienced teaching method received good result and proved appropriate in the teaching of Fundamentals of Nursing.Conclusion The experienced teaching method overcame the disadvantages of mere traditional teaching method and aimed at the improvement of quality and ability of students.It contributed to developing the critical thinking ability and other abilities of students.