Objective To investigate the effect of recombinant intestinal trefoil factor(rITF)on the intestinal mucosa of acute necrotizing pancreatitis(ANP)rats and explore the mechanism.Methods 60 male SD rats were randomly divided into control group(n=20),ANP group(n=20),rITF group(n=20).ANP was induced by retrograde injection of 5%sodium taurocholate(100μl/100 g)into biliopancreatic duct.Rats in rITF group were injected with rITF(0.5 mg/100 g)before and after ANP induction.The rats in ANP group and control group received same amount of normal sailne.Each group were sacrificed 12 h or 24 h later.respectively.Blood sample was taken to determine the serum level of amylase.Terminal ileum was resected to observe the pathologic changes;immunohistochemistry method was applied to detect the activity of NF-κB;the expression of TNF-α mRNA,ICAM-1 mRNA in intestinal mucosa was measured by RT-PCR.Results Intestinal injury score of ANP group was higher than that ofcontrol group(P＜0.05),intestinal injury score of ANP 12 h group was higher than that of rITF 12 h group(P＜0.05),but there was no significant difference between ANP 24 h group and rITF 24 h group.The number of positive NF-κB cells was 26±4,55±8,49±4,respectively;the relatively expression of TNF-α mRNA in terminal ileum was 0.050±0.005,1.040±0.031 and 0.792±0.0256,respectively;the relatively expression of ICAM-1 mBNA was 0.045±0.010,0.795±0.037 and 0.400±0.031,respectively,in control group,ANP group and rITF 12 h group.The corresponding values in the ANP group were significantly increased compared with those values in the control group (P＜0.05 or P＜0.01).Conclusions rITF may protect the intestinal mucosa.the mechanism may include inhibit NF-κB activation,down-regulate TiNF-α mBNA,ICAM-1 mRNA expression.

Objective To evaluate the tissue response to the covered metallic stent loaded with radioactive 125I seeds in normal rabbit esophagus.Methods Twelve rabbits were randomlv assigncd into 2 groups.A covered metallic stent loaded with three 125I seeds set in sheaths Was implanted into the esophagus of the rabbit from experimental group(22.2 MBq for each seed,n=6).The rabbits of control group were implanted with stent without 125I (n=6).Two rabbits from each group underwent esophagus X-ray examination to detect migration of the stent and the 125I seeds at 2,4 and 8 weeks after stent implantation,respectively.And the animals were then sacrificed to observe the changes in esophagus.Results No 125I seed migration Was found during and after the implantation of the stent.No esophageal perforation was observed.Two weeks after stent implantation,such mild lesions were observed in the middle of the esophagus in experimental group as slight epithelial hyperplasia and submucosal inflammation.At 4th week after stentimplantation,granulation and fibrosis were observed,which became more obvious at 8th week after the procedure.The injury of esophageal tissue opposite to the 125I seed Was significantly milder than that of the tissue exposed to 125I seed.In control group,esophagus adjacent to the middle of the stent WaS similar to normal tissue,with slight epithelial hyperplasia.However,both ends of the stent were covered with marked hyperplasia epithelium in both groups,and severe granulation and fibrosis could be observed.Conclusion The main pathological changes of esophagus wall adjacent to the 125I seed are granulation and fibrosis.No bleeding or perforation occurs.

Objective To observe the dynamic changes of leptin and transforming growth factor (TGF)-β1 in formation of liver fibrosis in rats,and the role of leptin in liver fibrosis.Methods Six rats were served as normal control(0 week)and killed at the beginning of the study.Thirty-two rats were subcutaneously injected with 60%CCl4 to establish fibrotie models.The rats were than sacrificed at 3,6,9 and 12 weeks with eight each.Expressions of leptin mRNA,Ob-Rb mRNA,TGF-β1 mRNA and TGF-βRⅡmRNA in liver were detected by reverse-transcription polymerase chain reaction(RT-PCR).Expression of Smad3 and Smad7 proteins were determined by Western blot.The expression and loealization of leptin,Ob-Rb and TGF-β1 in liver tissue were detected by immunohistochemistry.Results The expression of leptin mRNA,Ob-Rb mRNA,TGF-β1 mRNA and TGF-βR Ⅱ mRNA in 0 week were 0.43±0.45,0.57±0.21,0.19±0.12 and 0.30±0.22,respectively,and increased to 1.27±0.19,1.70±0.29,1.70±1.00 and 2.14±1.02 at 12 weeks(P＜0.05).At the same times the level of Smad3 increased from 0.44±0.24 at 0 week to 1.75±1.05 at 12 weeks.While the expression of Smad7 was decreased from 1.35±0.12 at 0 week to 0.74±1.21 at 12 weeks(P＜0.05).The expressions of leptin,Ob-Rb and TGF-β1 were increased with the formation of the fibrosis(P＜0.01).Conclusions With the development of liver fibrosis,the expressions of leptin,Ob-Rb mRNA and protein are increased and improved the formation of the fibrosis.Its mechanisms may be correlated with up-regulation of TGF-β1,TGF-βR Ⅱ and Smda3 expressions and down-regulaton of Smad7 expression by leptin.

ObjectiveTo investigate the effect of interstitial brachytherapy with 125Ⅰon human esophageal carcinoma implanted in nude mice. MethodsAnimal model simulating human esophageal carcinoma was established by subcutaneous implantation of cultured Eca-109 cell lines into nude mice.The mice were randomly divided into 3 groups,namely control group (saline plus empty seed),125Ⅰ seed group (22.2 MBq×1 seed),and DDP group (cisplatin at the dose of 1 mg/kg),to receive corresponding treatment.The growth rate and the pathological changes of esophageal carcinoma were observed.ResultsThe animals were sacrificed 16 days after irradiation.The average tumor weight in control group,125Ⅰ seed group,and DDP group were (0.20±0.06) g, (0.12±0.03) g and (0.12±0.05 ) g,respectively (P<0.05).Pathological findings included degeneration and necrosis of the tumor cells.Compared to the control group,the necrosis areas in 125Ⅰ seed group and DDP group were significantly larger than those in control (P<0.05).Conclusion125Ⅰ seed brachytherapy in esophageal carcinoma could cause degeneration and necrosis of the tumor cells and had inhibitory effect on tumor growth.

Objective To explore the symptomatic improvement of different achalasia (AC)subtypes after peroral endoscopic myotomy (POEM) procedure.Methods A total of 33 patients received POEM for the first time were enrolled.Patients were evaluated by high-resolution manometry (HRM)and subtyped by Chicago classification criteria.The total scores of symptoms were evaluated by Eckardt scale before and after POEM.Solid food dysphagia,liquid dysphagia,reflux and chest pain were scored by five-point Likert scales and compared by Wilcoxon paired test.Multiple linear regression analysis was performed to analyze key factors affecting the prognosis of symptoms.Results Among 33 AC patients,there were 20 females and the mean age was (44.0± 13.3) years.According to Chicago criteria,four patients had subtype Ⅰ AC,25 patients had subtype Ⅱ AC,and four patients with subtype Ⅲ achalasia.Before operation,the total Eckardt score was 7.5(6.3,10.0),which declined to 1.5 (1.0,3.0) after operation,and the difference was statistically significant (Z=-4.795,P ＜ 0.01).There was no statistically significant difference in the incidence of solid food/liquid dysphagia,reflux and chest pain among subtypies.Solid food dysphagia was the main symptom of each AC subtypes.POEM could improve all the symptoms of subtype Ⅱ AC except for chest pain.Before and after POEM,solid food dysphagia score was 16.0 (12.0,16.0) and 2.0 (1.0,12.0),liquid dysphagia score was 2.0 (0.0,5.0) and 0.0(0.0,0.0),reflux score was 9.0 (6.0,9.0) and 0.0 (0.0,1.0),respectively,and the differences were statistically significant (Z =-3.929,-3.470,1.841;all P＜ 0.01).The results of multiple linear regression analysis indicated that female and 4 s integrated relaxation pressure (4 s IRP) of 10 mL continuous swallows were positively correlated with symptom scores of solid food dysphagia (β 3.950,P=0.048;β=0.376,P=0.005);While 4 sIRP in solid food swallow was negatively correlated with symptom scores of solid food and liquid dysphagia (β=-0.244,P =0.008;β=-0.118,P =0.037).Conclusion For patients with AC,clinical symptoms could be significantly improved by single treatment of POEM,but there are certain differences in the symptomatic improvement among different subtypes.

Objective To observe the changes of esophageal motility in patients with achalasia (AC) before and after peroral endoscopic myotomy (POEM ) and to evaluate the effects of POEM on esophageal motility in AC .Methods A total of 35 patients with AC received POEM .The esophageal motility in response to different food swallows (5 mL liquid and 2 cm × 2 cm × 2 cm solid food) was evaluated by high-resolution manometry (HRM) system before operation and one month after operation .The changes of parameters of esophageal body and lower esophageal sphincter (LES) were analyzed and compared before and after operation .The t-test ,non-parametric test or single factor analysis of variance was performed for statistical analysis .Results Before POEM operation ,lower esophageal sphincter pressure (LESP) of 35 patients in response to liquid swallows and solid swallows was (28 .94 ± 18 .70) mmHg (1 mmHg=0 .133 kPa) and (26 .41 ± 11 .57) mmHg ,respectively ;after operation it was (16 .02 ± 5 .46) mmHg and (15 .82 ± 5 .04) mmHg ,respectively ;and the differences were statistically significant (t= 4 .338 and 4 .726 ,both P<0 .01) .Before operation ,4 s integrated relax pressure (4 s IRP) during liquid swallows and solid swallows was (27 .18 ± 14 .63) mmHg and (28 .46 ± 11 .15) mmHg ,respectively ;after operation it was (12 .22 ± 6 .75) mmHg and (14 .54 ± 7 .83) mmHg ,respectively ;and the differences were statistically significant (t= 5 .902 and 5 .436 ,both P< 0 .01) .And after operation intra boluspressure (IBP) of liquid swallows and solid swallows also decreased compared to that before operation (t=5 .075 and 2 .944 ,both P< 0 .01) .Lower esophageal sphincter relaxation rate (LESRR) during liquid swallows and solid swallows increased compared to that before operation (t= -2 .990 , P< 0 .01 ;t=-0 .340 ,P>0 .05) .There was no difference in the distal contractile integral (DCI) and distal esophageal peristaltic amplitude in subtype Ⅰ and Ⅲ patients before and after operation (all P>0 .05 ) .All those parameters decreased in subtype Ⅱ patients (Z= -2 .704 and -2 .489 ,P< 0 .05 ;Z= -1 .929 and-0 .747 , P> 0 .05 ) . Proximal esophageal peristalsis was observed in two patients after operation , however there was no integrated esophageal body peristalsis .Clinical symptoms quickly relieved in all patients after POEM operation and clinical score significantly decreased compared to that before operation (0 .86 ± 1 .19 vs 8 .16 ± 1 .84 ,t=20 .605 , P<0 .05) .Conclusions POEM can effectively relieve LES relaxation disorder in AC patients and improve esophageal body peristalsis to a certain degree .The efficacy is regardless of AC types ,and further studies are need to shed light on the long-term efficacy .The long-term efficacy still need further follow-up study .

Objective:To evaluate the efficacy and safety of non-submucosal injection in endoscopic submucosal excavation (ESE) for small submucosal tumors originating in the muscularis propria of the stomach.Methods:A total of 138 patients diagnosed as having small gastric muscularis propria tumors (≤2 cm) at Digestive Endoscopy Center of Zhejiang Provincial Hospital of Chinese Medical from November 2018 to October 2020 were randomly divided into the observation group with non-submucosal injection of ESE and the control group with submucosal injection of ESE for a randomized controlled trial. The exposure time, tumor removal time, operation cost, hospitalization period, numbers of metal clips and complications of the two groups were analyzed and compared.Results:A total of 138 patients were enrolled, including 76 patients in the observation group and 62 patients in the control group. All lesions were successfully and completely removed. Compared with the control group, the observation group had shorter median tumor exposure time [2.00 min VS 3.30 min, Z=-2.426, P =0.045], shorter median tumor removal time [16.8 min VS 34.4 min, Z=-4.324, P<0.001], less median surgical cost [2 903 yuan VS 3 178 yuan, Z=-5.112, P<0.001], and fewer metal clips used (4.0±0.6 VS 5.1±1.3, t=1.452, P=0.003). The incidence of postoperative abdominal distension of the observation group was lower [9.2% (7/76) VS 22.6% (14/62), χ2=2.512, P=0.049], the incidence of postoperative abdominal pain of this group was lower too [11.8% (9/76) VS 32.3% (20/62), χ2=4.242, P=0.014], but there was no significant difference in the period of hospitalization, incidence of postoperative fever or perforation ( P>0.05). Conclusion:Non-submucosal injection of ESE is safe and effective for submucosal tumors smaller than 2.0 cm originating from the muscularis propria of the stomach , which might be more advantageous than traditional ESE.

Objective To compare the consistency and detection rate of early gastric cancer (EGC) of three different methods including anti-Helicobacter pylori (Hp) antibody combined with pepsinogen (PG) (ABC method),serum PG combined with gastrin-17 (G-17) (new ABC method) and the new scoring system.Methods Serological tests were performed in Zhejiang population,which divided the subjects into low risk,intermediate risk and high risk groups.High risk subjects were examined by endoscopic and pathological examination.SPSS19.0 were used to evaluate the consistency of three methods.According to the receiver operating characteristic (ROC) curve,the ratio of G-17 to PG (PGR) was calculated for the optimal diagnostic cut-off value of EGC.Results A total of 30 126 subjects were recruited.Based on the data of ABC method,the proportions of low risk,intermediate risk and high risk group were 15 368 (51.01％),13 246 (43.97％),and 1 512 (5.02％),respectively.These proportions by the new ABC method were 20 584 (68.32％),8 990 (29.84％),552 cases (1.83％),respectively.By new scoring system,these were 20 810 (69.08％),8 059 (26.75％),and 1 257 (4.17％),respectively.Among them,1 263 subjects underwent endoscopy and 22 cases (1.74％) were finally diagnosed as gastric cancer including 19 EGC (86.4％).There were 1 case (0.35％),14 cases (1.84％),and 7 cases (3.21％) with gastric cancer in low risk,intermediate risk,and high risk groups by ABC methods,respectively.Gastric cancer patients were 7 (1.68％),10 (1.38％),and 5 (4.10％) in three groups respectively by new ABC methods.Via new scoring system,gastric cancer were detected in 5 (0.66％),9 (2.22％),and 8 (7.84％) patients of three risk groups respectively.The consistency of three screening methods was poor.The detection rate of gastric cancer in high risk group was higher than that in the other two (P＜0.05).The area under the curve (AUC) for diagnosis of gastric cancer by G-17 and PGR was 0.588 and 0.729,respectively.According to the PGR cut-off value determined by the fitted model,the incidence of gastric cancer in the low,intermediate and high risk groups was 0.94％,1.97％,and 6.31％,respectively.When the cut-off value is PGR＜4.135,the sensitivity is 0.855 and the specificity is 0.545.Conclusion The new scoring system has a better predictive value in EGC screening.The detection rate of EGC in high risk group is higher than that in low and intermediate risk groups.

Objective To analyze the accuracy of staging among the combination of endoscopic biopsy sites,operative link for gastritis assessment (OLGA) and operative link for gastric intestinal metaplasia assessment (OLGIM) with five different biopsy sites.Methods From January 2014 to September 2015,patients with functional dyspepsia and undergoing gastroendoscopy examination were enrolled.According to update Sydney system,a total of five biopsy pieces were obtained from lesser curvature of gastric body,larger curvature of gastric body,gastric angle,larger curvature of antrum and lesser curvature of antrum.The degrees of atrophy and intestinal metaplasia were determined and staged according to OLGA and OLGIM.Kappa test and chi-square test were performed for the statistical analysis.Results A total of 268 patients were enrolled.The incidences of atrophy and intestinal metaplasia in different sites were as follow:30.4％ (113/372) and 31.0％ (111/358) in lesser curvature of antrum;26.1％(97/372) and 25.1％(90/358) in gastric angle;20.2％(75/372) and 15.4％(56/358) in larger curvature of antrum;14.8％(55/372) and 15.4％(55/358) in lesser curvature of gastric body;8.6％(32/372) and 8.1％(29/358) in larger curvature of gastric body.The incidences of atrophy and intestinal metaplasia of lesser curvature of antrum were significantly higher than those of larger curvature of gastric body,lesser curvature of gastric body and larger curvature of antrum (x2 =45.248,48.029,20.024,18.892,7.681 and 7.848;all P＜＜0.05).The incidences of atrophy and intestinal metaplasia of gastric angle were significantly higher than those of lesser curvature and larger curvature of gastric body(x2 =32.752,31.269,11.605 and 8.448;all P＜0.05).The incidences of atrophy and intestinal metaplasia of the lesser curvature of gastric body and larger curvature of antrum were higher than those of larger curvature of gastric body,and the differences were statistically significant (x2 =6.080,8.048,17.280,18.980,all P＜0.05).The incidences of mild atrophy and intestinal metaplasia of the lesser curvature of antrum were 20.2 ％ (75/ 372) and 21.2％ (76/358),respectively,which were higher than those of larger curvature of antrum (12.9％,48/372 and 12.8％,46/358),and the differences were statistically significant (x2 =5.927 and 7.377,both P＜0.05).The incidence of severe atrophy of lesser curvature of antrum was 2.4％ (9/372),respectively,which was higher than that of larger curvature of antrum (0.8％,3/372),and the difference was statistically significant (x2 =3.000,P =0.015).The incidences of mild atrophy and intestinal metaplasia of the lesser curvature of gastric body were 10.5％ (39/372) and 11.2％ (40/358),respectively,which were higher than those of larger curvature of gastric body (5.4 ％,20/372 and 5.9 ％,21/358),and the differences were statistically significant (x2 =6.119 and 5.918,both P＜0.05).The consistency of staging by three biopsy sites (lesser curvature of gastric body,gastric angle and lesser curvature of antrum) and five biopsy sites with OLGA and OLGIM was 94.0 ％ (95 ％ confidence interval (CI) =91.2％ to 96.9％,Kappa value=0.912,P＜0.01) and 92.9％ (95％CI:89.8％ to 96.0％,Kappa value=0.893,P＜0.01).Conclusion Three biopsy sites (lesser curvature of gastric body,gastric angle and lesser curvature of antrum) could accurately reflect gastric mucosa lesions with less biopsy tissues and it is worthy of clinical popularization and application.