In this paper,the in vitro and in vivo effect of Se on T cell function was presented. Mouse spleen lymphocytes cultured in the presence of sodium selenite(30～1,000ng/ml)showed increased proliferation in response to Concanavalin A,but sodium selenite itself was not mitogenic.When sodium selenite was added into one-way mixed lymphocyte culture (MLC),not only was the proliferation of the responder cells increased,the induction of cytotoxic T lymphocytes(CTL)was also enhanced.In mice given Se(2-4ppm)in drink- ing water,the activity of MLC-induced CTL was higher than in untreatedcontrols.The augmented cytotoxic activity of CTL was alloantigenspecific.

Objective To investigate the influence of salvianolic acid B on the expressions of TGF-β1/Smad signaling pathway related proteins in human lung fibroblasts,and to explore the mechanism of the inhibitory effect of Sal B on TGF-β1-induced lung fibroblast activation.Methods The human embryonic lung fibroblasts (MRC-5) were cultured in vitro and randomly divided into control group ( the cells were cultured with DMEM without TGF-β1 or Sal B),Sal B group (the cells were cultured with 10μmol·L-1 Sal B),TGF-β1 group (the cells were cultured with 10μg·L-1 TGF-β1),and TGF-β1 (10μg·L-1 )+ Sal B (10μmol·L-1 )group.The protein levels of p-Smad2,p-Smad3,TβRⅠ,and Smad7 in the fibroblasts in various groups were detected by Western blotting method.Results Compared with control group,the expression levels of p-Smad2,p-Smad3,and TβRⅠproteins in TGF-β1 group were significantly increased (P<0.05),and the expression level of Smad7 protein was decreased (P<0.05).Compared with control group,the expression levels of p-Smad2,p-Smad3,TβRⅠ,and Smad7 proteins in lung fibroblasts in Sal B group had no significant change (P>0.05).Compared with TGF-β1 group,the expression levels of p-Smad2,p-Smad3,and TβRⅠ in TGF-β1+ Sal B group were descended (P<0.05),and the expression level of Smad7 was increased (P<0.05).Conclusion Sal B could suppress the TGF-β/Smad signaling pathway in lung fibroblasts and to inhibit the TGF-β1-induced lung fibroblast activation.

Objective To evaluate the possibility,efficacy and safety of endoscopic balloon dilation(EBD)for the treatment of common bile duct stones.Methods EBD of the sphincter of Oddi and removal of the stones by balloon,basket net and mechanical lithotripsy were performed in 47 patients with common bile duct stones.In order to prevent the possible complicated pancreatitis,Sandostatin,endoscopic nasobiliary drainage(ENBD)and small sphincterotomy were used according to the patients conditions.Results The success rate of EBD for the treatment of common bile duct stones was 91 5%(43/47)in our group.During one EBD session the common bile duct was cleared in 41(87 2%)of 47 cases.Incomplete duct clearance was achieved in 2(4 3 %)cases,both of whom underwent repeated EBD with successful duct clearance without undergoing endoscopic sphincterotomy(EST).Mechanical lithotripsy was required in 27(57 4%)of the 47 cases for stones greater than 1 0cm in diameter.Failure to clear the common bile duct with EBD in 4 cases(8 5%)was primarily related to large stones size (≥2 0cm),in whom EST was required to clear the duct.No perforation or hemorrhage was observed.Temporal hyperamylasemia was observed in 11 patients,only 1 of whom was accompanied by abdominal pain,which was rapidly relieved through conservative treatment.Conclusion EBD for the treatment of common bile duct stones is possible,effective and safe.

Objective: Construction mouse GM-CSF gene effective eukatyotic expressive vector, selection high GM-CSF expressing mouse leukemia cell line RMA after transfected with the constructed vector, and study the method of treatment leukemia with tumor cells transfected with GM-CSF gene.Methods:770 bp of GM-CSF 3' end cDNA was amplified by PCR and inserted into pcDNAS vector.The constructed vector was transfected into RMA cells by electroporation. After screening by G418 and cloning by limiting dilution, a relative high GM-CSF expressing cell clone was selected by RT-PCR, hematopoietic progenitor cell proliferative assay and hematopoietic progenitor cell colony formation assay. The cells of this clone were inactivated by mitomycin-C and vaccinated mice to induce antitumor immune reaction. Results: The orientation and sequence of the insert was found to be correct, and a GM-CSF high expressing cell line RMA-GM was selected , which can induce mice obtain anti-tumor protective immune ability after inactivated by mitomycin-C.Conclusion:Tumor cells transfected with GM-CSF gene may be used an effective anti-T lymphycoma tumor vaccine.

Objective To explore the value of combined biliary and duodenal stenting in the palliative treatment of pancreatic head carcinoma. Methods From August 2003 to July 2005, four patients who were diagnosed as pancreatic head carcinoma presenting obstructive jaundice were treated with biliary stenting. When duodenal obstruction occurred due to the growth of the carcinoma , duodenal stents were placed to relieve the obstruction. Results The biliary and duodenal stents were successfully positioned in all 4 patients. After biliary stents were inserted, the level of total bilirubin value of each patient decreased by 50% in 24 hours and returned to normal range within 1 week. When the biliary stents were occluded, stent replacement or restenting was performed, and relief of obstructive jaundice was thus achieved. After duodenal stents were inserted, the symptoms of duodenal obstruction were relieved and the patients were able to tolerate peroral solid food. When the duodenal obstruction recurred, a second coaxial duodenal stent was inserted. Three duodenal stents were placed in one patient because of rgrowth in size of the carcinoma. No complications related to stenting were observed. Two patients were followed up until their death with survival time of 24 months and 22 months, respectively, who were free of jaundice and duodenal obstruction at the end of their life. Two patients are still in follow-up period (16 months and 9months after stenting, respectively), who are now free of jaundice and duodenal obstruction. Conclusion Biliary stenting combined with duodenal stenting can improve the life quality of patients with pancreatic head carcinoma and is an effective palliative treatment for these patients.

Objective To evaluate the clinical curative effects of pancreatic stents on chronic pancreatitis.Methods 18 cases of chronic pancreatitis were diagnosed by clinical symptoms,by lab tests and by relative examinations.All cases had received pancreatic stents endoscopic treatment,and were followed up postoperatively about the change of the clinical symptoms and the lab tests.Results All cases were placed successfully pancreatic stents.Abdominal pain relieved completely within one month.The remissive rate of abdominal pain was a hundred percent.The clinical symptoms such as marasmus and fatty diarrhea were markedly improved.The serum amylase level recovered to the normal range within 1 to 14 days,except one case in which the serum amylase level recovered slowly for the dysfunction of pancreatic external secretion.The stent was replaced in 1 case after 10 days because of obstruction.Conclusion Pancreatic stents endoscopic treatment of chronic pancreatitis is a preferred method which is secure,low-traumatic,low-expenditure,convenient and effectual,and it is of prominent clinical application value.

Objective To evaluate the effects of endoscopic treatment on chronic pancreatitis. Methods 33 cases with chronic pancreatitis having received endoscopic treatment in a 2 years' period were retrospectively analyzed. The diagnosis was confirmed in all the patients by clinical examination, lab tests, CT, ultrasonography and endoscopic retrograde cholangiopancreatography (ERCP). According to the patients' condition, various treatment measures including endoscopic pancreatic sphincterotomy (EPS), endoscopic papillo-sphincterotomy (EST), pancreatic stenting (PS), pancreatic stone extraction, naso-pancreatic drainage (ENPD), pancreatic duct stricture dilation, etc, were used individually or jointly. Results 18 cases received EPS and 27 underwent EST. Pancreatic duct stone extraction by basket or balloon was performed in 6 cases, PS in 13, ENPD in 5, and pancreatic duct dilatation in 9 cases. The endoscopic drainage by transgastric placement of a stent was done in a patient with a huge pseudocyst. Abdominal pain disappeared or markedly relieved in 29 cases after treatment. Marked improvement after treatment was shown by lab examination and imaging. Conclusion The combined application of various treatment measures for chronic pancreatitis through endoscopic approach is a safe, minimal-invasive and effective procedure.

Objective To evaluate the clinical value of endoscopy for the treatment of acute obstructive suppurative cholangitis. Methods Data of 182 patients suffering from acute obstructive suppurative cholangitis, in whom endoscopic treatment was undertaken, were retrospectively analysed. Results All patients received endoscopic sphincterotomy (EST). Among them, 25 patients underwent endoscopic retractor-biliary drainage (ERBD), 140 patients received endoscopic naso-biliary drainage (ENBD), and in 17 cases endoscopic metal retractor-biliary drainage (EMBD) was done. The treatment was successfully in all patients. The clinical findings were markedly improved after treatment in all of them. Conclusion Endoscopic treatment was a fast, safe, effective and economic method for the treatment of acute obstructive suppurative cholangitis.

BACKGROUND:Cardiac stem cels transplanted to the myocardial infarction area can effectively improve ventricular remodeling and promote heart function. But the survival rate of transplanted cels is lower in the infracted area under hypoxic microenvironment. Hypoxia inducing factor 1 alpha under anoxic conditions can stably express, and meanwhile increase the activity and survival ability of myocardial cels. OBJECTIVE:To elaborate the research progress in hypoxia inducing factor 1 alpha-transfected cardiac stem cels for treatment of myocardial infarction from the folowing aspects: cardiac stem cel characteristics, mechanism underlying myocardial protection of hypoxia inducing factor 1 alpha, selection of carriers and transplantation approach. METHODS: A computer-based search of CNKI and PubMed was performed for articles related to cardiac stem cels and hypoxia inducing factor 1 alpha published from January 2000 to January 2015. The keywords were “cardiac stem cels, hypoxia inducible factor 1(HIF-1a), gene delivery” in Chinese and English, respectively, which appeared in the title and abstract. Finaly, 37 relevant articles were enroled in result analysis. RESULTS AND CONCLUSION:Several studies have confirmed that hypoxia inducing factor 1 alpha can improve the survival rate of cardiac stem cels under anoxic conditions. Increasing evidences from animal experiments have shown that cardiac stem cels and hypoxia inducing factor 1 alpha exert protective and repairing effects on myocardial infarction. Currently, there is no successful report about hypoxia inducing factor 1 alpha gene transfection of cardiac stem cels, but relevant studies are proceeding. Gene modified cardiac stem cels are expected to be widely used in clinic.

Objective To summarize cardiopulmonary bypass management in open heart surgery of children with congenital heart disease. Methods The clinical data of 80 children with age less than 4 years old underwent open heart surgery under cardiopulmonary bypass from January,2005 to January,2009 were retrospectively analyzed. Results The operations of all 80 cases were basically smoothly and no severe complications associated with extracorporeal circulation occurred. After cross-clamping releasing,automatically re-beating occurred in 75 cases,and 5 re-beat after electric shock. There was no postoperative death. Conclusions Open heart surgery under cardiopulmonary bypass is safe and efficacy in children with congenital heart disease.