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Objective To investigate the potential mechanism for symptoms related to epigastric discomfort in patients without Helicobacter pylori (H.pylori) infection.Methods Patients who underwent gastric endoscopy and conformed H.pylori negative by histologic examination were enrolled.Among them,232 adult patients were collected between August 2006 and November 2006 and 31 children were collected between September 2005 and August 2009.All patients showed no apparent abnormality by endoscopic examination.The endoscopic biopsy was examined with HE or Warthin-Starry staining.Results In adult group,arteriole obstruction was found in 16 (8.8%) cases and focal haemorrhage in 82 (45.6%) cases.Both were existed in 82 (45.6%) cases.The histopathologic findings showed that arteriole obstruction in transition zone (65.2 %,P = 0.159) was common,whereas the focal haemorrhage in gastric fundus and corpus (65.6%,P=0.001) was in predominance.The symptom of heartburn was less in patients with arteriole obstruction and/or focal haemorrhage in comparison with those without these changes (x2 =8.564,P=0.003).In adolescent group,arteriole obstruction and/or focal haemorrhage accounted for 96.8% (30/31).Conclusion Gastric mucosa ischemic resulted from arteriole obstruction are commonly seen in both adult and adolescent patients,which is an important reason for epigastric discomfort in H.pylori negative patients.
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Objective: To investigate the intestinal motor function (distal colonic manometry and gastrointestinal transit time) after T. spiralis infection in rats. Methods: Sprague Dawley rats were infected by administering T. spiralis larvae. Rats were studied on 14, 42, and 56 days post infection (PI). Age matched non infected animals served as controls. All rats underwent colonic manometry and gastrointestinal transit time test. Results: (1) The small intestinal inflammation became the most severe on day 14 PI, and returned to normal on day 56. (2) The distal colonic manometry showed significantly active motility in acute infected rats either at rest or upon balloon stimulating. (3) Rat colonic motility parameters were not different from those of the control rats either at rest or upon small volume (1mL) balloon stimulating on day 42 and day 56 PI. But when the balloon was inflated with 2 mL of air, the colonic activity increased significantly compared with that of the control. (4) Gastrointestinal transit time was slower in acute and PI rats than that in the control group. Conclusion: Intestinal motility function was abnormal persistently after transient intestinal nematode infection in rats either in distal colonic manometry or in gastrointestinal transit time.
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Objective:To assess the mechanism of exacerbation of colonic damage in rat colitis model induced by trinitrobenzene sulfonic acid(TNBS)treated wi th celecoxib(a selective COX-2 inhibitor).Methods:The rats w ere randomized in to four groups.Group 1 and Group 2 were study groups.Group 3 and Group 4 were control groups.Colitis was induced by intracolonic administration of TNBS(25 g /L)in a vehicle of 50% ethanol(0.25 mL)of study groups.The rats of study gro ups were treated orally,beginning 3 h before induction of colitis and continuin g twice per day thereafter for up to 7 d,with celecoxib(1.25 mg/kg,Group 1)a nd distilled water(1 mL/0.3 kg,Group 2)respectively.In control experiments,the rats of Group 4 were treated orally with celecoxib(1.25 mg/kg)twice per da y for up to 7 d.Group 3 rats were healthy control rats.All the rats that survi ved until the end of the experiment(d 7)were killed and the severity of coloni c inflammation was assessed.The COX-2 protein expression in colon tissues was e xamined by immunohistochemistry.Results:The colonic damage of Group 1 was exac erbated as compared with Group 2.The inflammatory index of colon tissues of Gro up 1(8.5?2.5)was significantly reduced,as compared with Group 2(13.5?1.9,P
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Objective: To investigate the effect of the acid inhibitor-Lansoprazole on the distribution of Helicobacter pylori (H.pylori) in stomach. Methods: Biopsy specimens were taken from the duodenal ulcer patients who underwent gastroscopy before and after the treatment of Lansoprazole. The biopsy specimens were taken from the lesser curvature of the antrum and the greater curvature of the corpus respectively. H&E and Warthin-Starry staining were used for detecting the changing of active gastritis and the positive rate of H.pylori. Results: (1)The positive rates of H.pylori before treatment, 4 weeks after treatment and 3 months after treatment, in the lesser curvature of the antrum were 93.02%, 58.14%, and 86.05%, respectively. The positive rate and density of H.pylori 4 weeks after treatment were greatly decreased compared with those before treatment (P
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Objective Cervical reserve cells are the maternal cells of cervical neoplasia. It's proliferation and origin were studied. Methods The pathological morphology of cervical reserve cell proliferating was observed by light microscopy in 238 cases of cervical benign diseases; Immunohistochemical technology of CD44v5 was used to inspect the expression of cervical reserve cells in 54 cases. Results and Conclusion 1.Reserve cell proliferation was common in most cases of cervical benign diseases and it was originated from stroma; 2 The proliferating reserve cells were composed of four types:large cells, small cells, clear cells and spindle cells; 3The expression of CD44v5 in reserve cells showed 100% strongly positive. The cells proliferation was common in begin diseases of cervix; Reserve cells possibly were originated from stroma.
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Objective To investigate the localization and mRNA expression of dopamine receptor subtype D_4 and D_5 mRNA in human stomach and duodenum by in situ hybridization. Methods The oligonucleotide probe was synthesized and labeled with digoxin, and then hybridized with human gastric and duodenal samples, which were stored in liquid nitrogen, fixed in hypothermia, and embedded in paraffin. The results were recorded and quantitatively analyzed using the pathological image computer analysis system. Results Dopamine receptor subtype D_4 and D_5 mRNA both expressed in human stomach as well as duodenum. They distributed mainly in the interstitial of mucosal glands and the lamina propria near lamina muscularis mucosa. The mRNA expression value of D_4 was higher than that of D_5 in both stomach and duodenum. In stomach, the number of positive target cells was 41.29?5.06 vs. 26.25?5.82 ( P
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Objective To investigate the effects of su lindac on sporadic colorectal adenomas. Methods Thirty-six patients diagnosed as sporadic colorect al adenomas colonoscopically and pathologically were randomly divided into t wo groups. The study group took 400 mg of sulindac daily and the control group w ere given placebo both for 4 months. Changes of number, size, figure and degree of atypia of adenomas were compared before and after treatment. Results Sixteen patients in each group finished the trial. In the study group, the average diameter of 59 adenomas before and after the treatment was (3.6?2.2) mm and (2.4?1.5) mm, respectively. The difference was statist ica lly significant (P0.05) nor were the changes in figure and degree of atypia of adenomas. Conclusions Sulindac is effective in the reduction of size and a typ ia degree of adenomas in patients with sporadic colorectal adenomas but the long term effects of sulindac in patients with sporadic colorectal adenomas should b e observed.
