The growth factor receptor -bound protein-2 (Grb2) is an adapter protein in cells. Over expression of Grb2 is found in many kinds of tumor and plays an important role in tumor proliferation and progression. So it may be a molecular target for anti-tumor therapy.

Objective To observe the effects of arsenic trioxide(As2O3)on the expressions of TNF-?,Fas and bcl-2 in lung adenocarcinoma cells(LAC)and to explore the mechanism of arsenic trioxide inducing apoptosis.Methods The expressions of TNF-?,Fas and bcl-2 in lung adenocarcinoma cells pretreated by arsenious acid were determined by the double antibody sandwich ABC-ELISA method.Results Compared with the control group,As2O3 showed no effects on the contents of bcl-2 in lung adenocarcinoma cells after 72 hours treatment,but increased the contents of TNF-? and Fas significantly,and the effects in different concentration groups had significant differences.The protein expressions of TNF-? and Fas showed a tendency of concentration-dependent increasing.Conclusions The results suggest that As2O3 induces the apoptosis of LAC cells possibly by up-regulating the expression of TNF-? and Fas.

ObjectiveTo analyze Rome Ⅱ and Rome Ⅲ criteria in clinical characteristics of functional dyspepsia (FD) diagnosis and the differences in subtypes of FD,and to assess the psychosocial status of FD patients.Methods From June 2008 to December 2008,1600 random outpatients who underwent upper gastrointestinal endoscopy in department of gastroenterology fulfilled the inquiry questionnaire.The subtype was diagnosed according to Rome Ⅲ and the Rome Ⅱ criteria and the results were analyzed.ResultsA total of 215 patients (13.44％) were in accordance with Rome Ⅱ criteria and 249 patients (15.56 ％) were in accordance with Rome Ⅲ criteria,there was no difference in FD detection rate between these two criteria (x2=2.176,P＞0.05).About 71.16％(153/215) of the FD patients diagnosed according to Rome Ⅱ criteria were also in accordance with Rome Ⅲ criteria,and 23.26％ (50/215) who had bothersome postprandial fullness,early satiation,epigastic pain or epigastric burning did not meet Rome Ⅲ criteria.About 61.45 ％ (153/249) of the FD patients diagnosed according to Rome Ⅲ criteria were also in accordance with Rome Ⅱ criteria,and the courses of disease of 28.92％(72/249) patients didn't met Rome Ⅱ criteria.According to RomeⅡ,51 (23.72％) patients were ulcer-like type,103 (47.91％)patients were dysmotility-like type,and 61 (28.37％) patients were non-idiotype.According to Rome Ⅲ criteria,76.31％ (190/249) patients were consistent with postprandial distress syndrome (PDS),52.61％ (131/249) patients were consistent with epigastric pain syndrome (EPS),and 28.92％ (72/249) patients met both PDS and EPS.The percentage of the FD patients with anxiety and depression was 16.83％ and 47.52％respectively.Of the FD patients in accordance with Rome Ⅲ criteria who were with both anxiety and depression,the total symptom scores of bothersome postprandial fullness,early satiation,epigastic pain or epigastic burning were the highest (x2 =49.637,P＜0.05).ConclusionsRome Ⅲ criteria is easier to understand and more practical.FD patients always have psychosocial disorders,which may worsen the clinical symptoms.

【Objective】 To explore the therapeutic mechanismof arsenic trioxide(AS2O3),the active component of arsenolitumininhibitingtumor.【Methods】Humanlung adenocarcinoma cells(LAC) at logarithmic growth phase were culturedin vitro for 24 hours,and then were cocultured with arsenic trioxide(AS2O3) in the dosages of 0.75,1.0,1.5 and 2.0 mg/Lrespectively.Meanwhile,model control group was set up.The morphological features of LAC in different groups were observed under reverse microscope,growth-inhibitory rate of LAC was examined by methylthiazolyltetrazolium(MTT) assay,andthe expression of p53 gene was detected by enzyme-linked immunosorbent assay(ELISA) method.【Results】AS2O3in different dosages obviously inhibited the proliferation of LACin a time-effect manner,and markedly increased the expression of p53 gene(P

Objective To understand the knowledge,attitudes and impact factors related to voluntary counseling and testing(VCT)for HIV/AIDS among migrants in Minhang district of Shanghai.Method Using a convenience sampling strategy,74 migrants,27 key informants and 20 community service providers were selected to participate in in-depth interviews and focus group discussions.Results Most migrants were young,less educated and poorly aware of HIV prevention.Only one third of the migrants heard of VCT,but few of them knew where to seek VCT or had any personal VCT experience.Nearly half of the interviewees took a negative attitude towards those who participated in VCT service.The main factors influencing the participation in VCT service among the migrants were the knowledge of VCT,having risk behavior and perception,supportive environments and availability of HIV/VCT services.Conclusions There is an urgent need to promote extensive health education about HIV/VCT,adopt flexible and available approaches to VCT service and provide appropriate care following the HIV test among migrants.

Messenger RNA was isolated directly from lung cancer cell line A549 using magnetic particles. First strand synthesis from mRNA was driven by M-MLV(Moloney Murine Leukemia Virus) reverse transcriptase and random hexam-eric primer, followed by second strand synthesis using RNase H and DNA polymerase I After treatment with T4 DNA polymerase to flush the ends, the double-stranded cDNA was cloned into the plasmid expression vector digested with EcoRI and followed by removing cohesive end. The number of independent clones of the resulting cDNA library was about 9.0 x 105. The estimated percentage of colonies with inserts was about 85 % . The insert size ranges from 0.5 kb ~ 4 kb. The CPP32 gene coding for death protease was obtained by PCR with the cDNA library from lung cancer cells as a template for the first time. Construction of the cDNA library laid a foundation for screening other genes regulating death of lung cancer cells.

BACKGROUND:cells under mechanical stimulation can achieve their biological functions by converting mechanical signals into chemical signals through certain signal transduction mechanism. As the fibrous framework throughout a cell, cytoskeleton is one of the critical components in this process.
OBJECTIVE:Through systemical y analyzing the role of the cytoskeleton in mechanical signal transduction, to provide a potential therapeutic target for the clinical treatment of cytoskeleton related diseases.
METHODS:In order to search relevant articles about the mechanics mechanism of signal transduction of cytoskeleton from PubMed and CNKI databases (from 1990 to 2012), a computer-based search was performed, using the key words of“cytoskeleton, microtubules, microfilaments, intermediate filaments, mechanical stimulation, signal transduction”in English and Chinese, respectively. After eliminating literatures which were irrelevant to research purpose or containing a similar content, 48 articles were chosen for further analysis.
RESULTS AND CONCLUSION:Mechanical stimulation plays an important role in cellproliferation, development and apoptosis. With the gradual understanding of the biological function of cytoskeleton, people have found that cytoskeleton is one of the critical components in the process of the mechanical signal transduction. After getting mechanical stimulation, cytoskeleton can be reorganized through Rho, protein kinase C, integrin and mitogen-activated protein kinase signaling pathways, then converting the mechanical stimulation to chemical signals and finishing its biological functions final y.

To observe the effect and its potential mechanism of monoclonal antibody to tumor necrosis factor-alpha(TNF? MoAb)on systemic hemodynamics and survival rate after intestinal ischemia/reperfusion (Ⅱ/R). Method: SD rats were subjected to 75 rain of superior mesenteric artery occlusion followed by 6 hours of reperfusion. The animals were treated intravenously with either TNF? MoAb(20mg/kg)or the control protein(albumin, 20mg/kg) 30 min prior to the onset of ischemia. Result: Pretreatment with TNF? MoAb significantly attenuated the decrease in blood pressure and cardiac index compared to controls throughout the 6-hour period of observation(P

OBJECTIVE To ensure clinical application of standard procedure in the management of dental handpieces collection and sterilization.METHODS To establish the center of sterilization and supply for dental handpieces;to equip with the device for depuration and sterilization;to standardize the procedure for depuration,retrieval,pre-disposal treatment,cleaning,drying,lubrication,envelopment and sterilization.RESULTS The management of collection and sterilization for dental handpieces ensured the clinical application of standard procedure,avoided the exogenous infection and guaranteed the patients safety.CONCLUSIONS The clinical management of collection and sterilization for dental handpieces is an effective method.

Myocardial fibrosis is a predominant pathological change of radiation-induced heart disease (RIHD) in late stage.It often occurs several or more than ten years after radiotherapy and can lead to myocardial remodeling, impaired cardiac function, and heart failure.At present there is no effective method to prevent or reverse the development of radiation-induced myocardial fibrosis.Many cells, cytokines, and other factors are involved in the development and progression of myocardial fibrosis in RIHD and some of them have been validated.But most investigators focused on the pathological changes and related mechanisms in early stage, and myocardial fibrosis was just regarded as an endpoint event.The definitive mechanisms of myocardial fibrosis in late stage remain unclear.This paper reveiws the studies about general mechanisms of myocardial fibrosis in RIHD and summarizes the roles of microcirculation dysfunction, mast cells, several cytokines, hypoxia, oxidative stress, and renin-angiotensin system, and points out the future research direction of the pathogenesis of myocardial fibrosis in RIHD.It provides new ideas for discovering the potential targets for clinical intervention of myocardial fibrosis in RIHD.