Objective:To explore the effect of autophagy inhibitor 3-methyladenine(3-MA) on camptothecin(CPT)-induced Hela cell apoptosis.Methods:MTT assays were carried out to determine the optimal concentration and time of CPT on Hela cells and the effect of different drugs on Hela cell proliferation activity .After Hela cells were treated with different drugs ,the changes of autophagy marker protein( microtubule-associated protein 1 light chain 3,LC3),p62 and apoptosis-related protein were detected using Western blot and immunofluorescence ( IF) .DAPI ( nuclear ) staining was used to observe cell apoptosis rate .Results: In CPC-treated Hela cells,Hela cell proliferation activity declined dramatically ,and autophagy could be induced to occur .Compared with CPT group ,the cell proliferation activity was lower in CPT combined with 3-MA group,the level of autophagy decreased ,but the apoptosis rate significantly increased.Conclusion:CPT can induce autophagy while inducing Hela cell death .Hela cells chemosensitivity to CPT treatment can be enhanced by 3-MA inhibiting autophagy .

Objective To study the effect of ursolic acid (UA) intervention on hepatocyte apoptosis induced by TGF-β1 and its potential mechanism.Methods Primary hepatocytes were extracted from healthy SD rats by in situ perfusion,cultured for 12-24h,then randomly divided into the following groups:blank control group,UA control group (UA 25μmol/L),TGF-β1 group (TGF-β1 2.5ng/ml),UA intervention group (UA 25μmol/L and TGF-β1 2.5ng/ml),DPI intervention group (DPI 0.5μmol/L and TGF-β1 2.5ng/ml).Each group was treated with drugs for corresponding time and their proliferation and apoptosis were detected by flow cytometry,the expression of CD95 (Fas) mRNA was analyzed by RT-qPCR,the expression of protein CD95 and membrane translocation of NADPH oxidase (NOX) subunit p47Phox were analyzed by Western blotting,and the reactive oxygen species (ROS) generation in primary hepatocytes was analyzed with reactive oxygen detection kit.Results UA intervention at 30min before TGF-β1 stimulating hepatocytes markedly reduced hepatocyte apoptosis (63.97 ± 3.19 vs 80.53 ± 1.56,P＜0.01) and promoted hepatocyte proliferation (18.67 ± 1.60 vs 10.83 ± 2.03,P＜0.01).UA intervention notably down-regulated the expressions of CD95 mRNA and protein (1.28 ± 0.15 vs 2.40 ± 0.25,P＜0.01;1.05 ± 0.15 vs 1.37 ± 0.18,P＜0.05),restrained membrane translocation of p47phox (1.13 ± 0.12 vs 1.76 ± 0.22,P＜0.01),and decreased ROS level in primary hepatocytes induced by TGF-β1 (2.12 ± 0.45 vs 3.23 ± 0.53,P＜0.01).Conclusion The mechanism of UA inhibiting hepatocyte apoptosis induced by TGF-β1 is likely to be that UA intervention reduced hepatocyte apoptosis by inhibiting NOX activation and decrease generation of ROS so as to down-regulate expression of CD95 in hepatocytes.

Objective To investigate the clinical features of gastric stump ulcer (GSU)after partial gastrectomy due to gastroduodenal ulcer.Methods From January 1st 2007 to October 31th 2013,272 patients with partial gastrectomy for gastroduodenal ulcer underwent gastroscopy due to upper gastrointestinal symptoms were collected.Among them,there were 237 male patients and 35 female patients with the average age (55 .4 ± 13.0 )years.The lesion location,symptoms and pathological changes of GSU were analyzed.Chi-square test and Fisher exact probability analysis were used for count data comparison.The t test was performed for measurement data comparison.Results There was no significant difference between patients with GSU after Billroth Ⅰ gastrectomy and Billroth Ⅱ gastrectomy in the incidence of dysphagia,nausea and vomiting,retrosternal pain,retrosternal buring sensation,upper abdominal pain, abdominal distention, acid regurgitation and (or) epigastric buring sensation, hematemesis and (or)melena (all P >0.05 ).The proportion of ulcer located in remnant stomach and anastomotic stoma of patients with Billroth Ⅰ gastrectomy (24.7%,18/73 and 72.6%,53/73 )was higher than those of patients with Billroth Ⅱ gastrectomy (10.1 %,20/199 and 58.3%,116/199 )and the difference was statistically significant (OR=2.929 and 1 .896,95 %CI :1 .448 to 5 .927 and 1 .055 to 3.409,χ2 =9.482 and 4.649,P =0.002 and 0.031 ).There was no significant difference between the proportion of afferent loop and efferent loop ulcer in patients with Billroth Ⅱ gastrectomy and the proportion of duodenal ulcer in patients with Billroth Ⅰ gastrectomy (P =0.619).The diameter of GSU of patients with BillrothⅠ((1.1±0.7)cm)was larger than that of ulcer of patients with BillrothⅡ((0.8±0.6)cm) and the difference was statistically significant (t = 3.591 ,P = 0.007 ).The incidence of intestinal metaplasia and atypic hyperplasia of GSU was 8.1 % (22/272),and there was no significant difference in gastric ulcer,stoma ulcer,nek ulcer,afferent loop and efferent loop ulcer (all P >0.05).The incidence of gastric stump cancer of GSU was 4.0% (11/272)and that of gastric ulcer,stoma ulcer,nek ulcer,afferent loop and efferent loop ulcer was 13.2% (5/38 ),2.4% (4/169 ),1.8% (1/55 )and 1/10,respectively.The incidence of gastric stump cancer of gastric ulcer was significantly higher than that of stoma ulcer and nek ulcer, the differences were statistically significant (OR =6.250 and 8.182,95%CI :1.593 to 24.519 and 0.915 to 73.126,χ2 =8.687 and 4.788,P =0.012 and 0.040).There was no statistically significant difference in the incidence of gastric stump cancer of GSU in other gastric parts (all P > 0.05 ).There was no statistically significant difference in the incidence of intestinal metaplasia,atypic hyperplasia and gastric stump cancer between case with BillrothⅠgastrectomy and case with Billroth Ⅱ gastrectomy (P =0.650 and 0.733).Among the 11 gastric stump cancers,the number of cases with the onset time with 20 years,20-30 years and beyond 30 years after gastrectomy were one,three,seven,respectively.Conclusion The incidence of intestinal metaplasia, atypic hyperplasia and gastric stump cancer of patients with GSU was high,and the predilection site of GSU was the remnant stomach.

Objective To investigate the role of combined multichannel intralumminal impedanee-pH (MII-pH) monitoring in the diagnosis of gastroesophageal reflux disease (GERD). Methods Forty-four consecutive patients, who had heartburn symptom and without esophageal mucosal lesion, underwent combined MII-pH monitoring. Then rabeprazole test was performed for 14 days with 10 mg twice daily. Rabeprazole test was defined as positive if patients were totally heartburn symptom free in the second week. The normal values from 70 healthy volunteers who underwent MII-pH monitoring were served as controls. Results Conventional esophageal pH monitoring showed that 20 patients (45.5%) had pathologic esophageal acid exposure or positive acid reflux associated symptom index. MII-pH monitoring revealed that 2 patients were positive for weakly acidic reflux related to symptom index, thus increased the diagnostic yield to 50% (22/44). Furthermore, rabeprazole test demonstrated that 4 patients were positive which increased the diagnostic yield to 54.5%(24/44). Conclusion The detective rate of GERD will be elevated if combined with MII-pH monitoring in diagnosis.

Objective To investigate the prevalence of non-acidic reflux in patients with gastroesophageal reflux disease and its correlation extent with heartburn symptom by 24-hour combined multichannel intraluminal impedance-pH (MII-pH) monitoring. Methods Consecutive patients with chief complain of heartburn in gastrointestinal specialty clinic were enrolled. Patients were divided into erosive esophagitis (EE) group, non-erosive reflux disease (NERD) group after upper gastrointestinal endoscope, further diagnosed with 24-hour combined MII-pH monitoring and rabeprazole test. The MII-pH parameters were compared in these two groups. Results 36 cases of EE and 62 of NERD were enrolled. There was significant difference in acidic reflux frequency and acidic reflux time percentage between these two groups (P=0. 001 and 0. 002). The frequency of non-acidic reflux in EE and NERD groups was 37.3% (663/1777) and 44.3% (1220/2754) respectively (x2 =21. 723,P = 0. 000). The percentage of heartburn symptom positive index in patients with acidic reflux, non-acidic reflux , and total reflux in EE group was 36.1 % (13/36), 19.4 % (7/36) and 55.6%(20/36) respectively, while in NERD group was 27. 4% (17/62), 6.4 % (4/62) and 33.8% (21/62).Conclusion The percentage of non-acidic reflux in EE and NERD groups was 37.3% and 44.3%respectively, and the non-acidic reflux was highly related to heartburn symptom.

Esophageal variceal bleeding is a serious complication of liver cirrhosis. Endoscopic therapy is a main method for the prevention and treatment of esophageal variceal bleeding, which includes endoscopic variceal ligation, sclerosing agent injection, endoscopic ultrasound-guided injection of sclerosing agent, tissue adhesive injection, self-expandable covered metallic stent, and combination treatment. This article reviews the indications, clinical effect, and complications of these endoscopic therapies.

Objective To explore the normal values for two-dimension solid state high resolution anorectal manometry (HRAM) in healthy adult volunteers.Methods The healthy adult volunteers were recruited by advertisement and underwent solid state HRAM in the left lateral position.Anorectal pressures and rectal sensation were recorded and analyzed.Results (1) A total of 126 Chinese healthy adult volunteers (male:50 cases (39.7％);age:(37.5 ± 14.2) years old) were recruited in this study.(2)Mean anal resting pressure (MERP) was (71.8 ± 17.3) mmHg (1 mmHg =0.133 kPa).Maximum anal resting pressure (MARP) was (79.3 ± 17.8) mmHg,Maximum anal squeeze pressure (MSP) was (178.7 ± 52.8) mmHg.Anal high pressure zone (HPZ) length was (3.4 ± 0.6) cm.During simulated evacuation,residual anal pressure (RAP) was (63.8 ±20.5) mmHg,and anal relaxation rate (ARR) was (37.0 ± 11.5) ％.Rectal threshold volume for first sensation (FST),desire to defecate (DDT),urgency to defecate (UDT) and maximum discomfort (MDT) was (47.4 ±10.0) ml,(84.5 ±18.2) ml,(125.8 ± 28.5) ml,and (175.5 ±36.1) ml,respectively.(3) Compared with female subjects,male subjects had higher MSP [(211.0 ± 50.7) mmHg vs (157.5 ± 42.5) mmHg],RAP [(71.6 ± 18.1) mmHg vs (58.8 ± 20.5) mmHg]and rectal MDT[(187.0 ±36.4) mmHg vs (168.0 ±34.1)mmHg],but lower ARR [(32.1 ±8.0)％ vs (40.2 ±12.3)％],all P＜0.01.(4) MERP,MARP,MSP and rectal MDT were higher in young group (≤ 40 years old),all P ＜ 0.05.Conclusions These observations provide normal values for two-dimension solid state HRAM,which have significant difference between genders and different age groups.