Electrical potential difference (PD) was measured across the wall of reverted small intestinal saes of mice. The effect of glycyrrhizic acid on transmural potential related to Na+ and glucose transport were investigated. It was found that both zhigancao (100g/L ) and glycyrrhizic acid (2. 5mmol/L ) decreased the PD (P＜0.01).According to the theory of active transport of glucose, we inferred that zhigancao and glycyrrhizic acid possibly produce an inhibitiory effect on Na+. K+-ATP ase,resulted in a blocking effect on sodium channel.

Objective To investigate the eye-movement features of smooth pursuit in subjects at clinical high risk for psychosis.Methods sixty subjects at clinical high risk for psychosis and sixty healthy controls were recruited.The smooth pursuit tasks were assessed in both horizontal (0.4 Hz) and Lissajous (0.2 or 0.4 Hz) condition.The Wechsler Memory Scale-third edition and spatial span subtest were used to assess working memory.The difference of the smooth pursuit performance between the two groups and the relationship between smooth pursuit and working memory were analyzed.Results Subjects at clinical high risk for psychosis showed significantly lower Horizontal components for pursuit gain [Lissajous 0.2 Hz task (0.82±0.12) vs.(0.89±0.09),Lissajous 0.4 Hz task (0.78±0.13) vs.(0.84±0.14)],lower vertical components for pursuit gain [Lissajous 0.2 Hz task (0.80±0.14) vs.(0.86±0.12),Lissajous 0.4 Hz task (0.71±0.15)vs.(0.77±0.16)] and higher mean positional error [Lissajous 0.2 Hz task (37.00±19.10) vs.(30.45± 16.18),Lissajous 0.4 Hz task (44.18±19.70) vs.(37.61±16.26)] compared to healthy controls (P＜0.05).There was a significant correlation between pursuit gain and performance on Spatial Span (Horizontal components:r=0.361,P=0.005;vertical components:r=0.327,P=0.01 1) in the Subjects at clinical high risk for psychosis.Conclusions Subjects at clinical high risk for psychosis showed deficits in smooth pursuit,and the deficits were related to the working memory.

Objective To evaluate the clinical value of OLGA (Operative Link on Gastritis Assessment) system in pathological assessment of gastric mucosa from Chinese patients.Methods Endoscopic and pathological data of patients,who underwent the endoscopic examination of upper gastrointestinal tract from 2007 to 2012,were analyzed.Using the Sydney protocol,we graded atrophy and staged the Helicobacter pylori infection status in gastric biopsies from 108 patients with dyspepsia.We applied the OLGA system to assess the relationship between OLGA staging and grading and dysplasia/cancer,and the relationship between OLGA grading and Helicobacter pylori infection.Results Two cases of early gastric adenocarcinoma were detected at stage Ⅱ and Ⅳ,respectively.The detection rates of precancerous lesions (including intestinal metaplasia and dysplasia) in cases clustered in stages Ⅲ-Ⅳ were significantly higher than those in stages 0-Ⅱ (intestinal metaplasia:100.0％ VS 65.3％,P ＜0.001 ;dysplasia:77.8％ VS 13.9％,P ＜0.001,respectively),and there were significant differences between OLGA staging and the degree of dysplasia (r =0.671,P ＜0.001).In the subjects at stage 0-Ⅱ,we observed only 10 cases (13.9％) of mild dysplasia.The difference in rate of Helicobacter pylori infection was significant at different OLGA grade (P ＜ 0.001),and the correlation between OLGA grading and infection degree of Helicobacter pylori was significant (r =0.586,P ＜ 0.001).Conclusion Precancerous lesions and gastric adenocarcinoma tend to be discovered in patients clustered at high-risk (Ⅲ-Ⅳ) OLGA stages.OLGA staging of dysplasia can effectively differentiate the risks of gastric cancer.The OLGA grading system is consistently associated with the Helicobacter pylori infection.

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.

Objective Collagenous gastritis is a rare entity, characterized by the deposition of a subepithelial collagen band with an inflammatory infiltrate in the mucosa.This report describes the first case of collagenous gastritis occurring in a young Chinese woman and reviews the literatures.Methods The patient underwent the gastroscopy screening, and the biopsy specimens were treated with HE staining, Masson staining, Congo red staining and Warthin-Starry staining.Patients' clinical data was discussed and followed up.Results A twenty-year-old girl had intermittent epigastric pain for 4 years, abdominal distention, hiccup and weight loss for two months.The gastric endoscopy revealed diffuse white nodular appearance of the mucosa in angular incisure and antrum.Pathologic examination of the gastric biopsies from the antrum and angular showed a subepithelial collagen deposition with moderate infiltrates of lymphoplasma cells and eosinophils of the lamina propria.The collagen band measured up to 120.3 μm (mean 43.8 μm).Prednisone 20 mg/d for 4 weeks led to clinical remission and weight gain.Conclusion There are about 40 cases in literatures to date, and the cause and pathogenesis of collagenous gastritis remain unknown.According to the clinical and pathological characteristics, the patient in this article is the subtype of collagenous gastritis that occurring in children and young adults.Specific therapy has not been established, the gluten-free diet and glucocorticosteroid may be helpful to relieve symptoms in collagenous gastritis patients.

Objective:To investigate the expression of annexin 5 in rat testis after removing submandibular gland in rats. Methods:On day 14,28 and 42 after the operation,the changes of annexin 5 expression in rat testis were analyzed by Western blot and Immunohistochemistry.Results:Western blot showed that there was a 27.5% and a 35.2% significant increase(P

Objective: To investigate awareness of digestive system injury caused by corona virus disease 2019 (COVID-19) in gastroenterologists. Methods: From February 21 to 23 in 2020, the electronic questionnaire was sent out to explore the condition of the basic knowledge of COVID-19 and knowledge of digestive system injury caused by COVID-19 grasped by gastroenterologists. Chi-square test was used for statistical analysis. Results: A total of 2 216 gastroenterologists from 31 provinces, autonomous regions and municipalities nationwide completed the survey. 99.7% (2 209/2 216) of gastroenterologists stated that they had read the COVID-19 diagnosis and treatment guidelines. The percentage of physicians who well knew the diagnostic criteria of suspected and confirmed cases of COVID-19 was 34.9% (774/2 216) and 39.4% (874/2 216), respectively. The percentage of physician who gave the right answer of COVID-19 detectable methods and lung imaging was 68.4% (1 516/2 216) and 71.6% (1 586/2 216), respectively. The percentage of correct answer of digestive system injury caused by COVID-19 in residents, attending physicians, associate chief physicians and chief physicians was 30.9% (134/433), 33.9% (234/691), 32.4% (213/657) and 34.9% (152/435), respectively, however there were no statistically significant differences among physicians of different level (χ²=6.60, P> 0.05). 95.6% (2 119/2 216) of gastroenterologists believed that probiotics could effectively improve bowel function, and 94.0% (2 082/2 216) of gastroenterologists considered that enteral nutrition support could improve patients’ prognosis. Conclusions The knowledge and dynamic progress of the digestive system injury caused of COVID-19 are still insufficiently grasped by gastroenterologists in China. So it is necessary to carry out systematic and pertinent training for them.

Objective To explore the characteristics of alexithymia and interoception in patients with panic disorder(PD) and its relationship. Methods Thirty-seven patients with PD and 45 healthy con-trols who met the diagnostic criteria of DSM-Ⅳ were selected. Toronto Alexithymia Scale ( TAS) and state-trait anxiety inventory ( STAI) were used to assess the characteristics of alexithymia and anxiety symptoms respectively. The heartbeat perception levels were tested by the Mental Tracking Paradigm. Results The de-tection rate of alexithymia in patients with panic disorder was 37. 83% (14/37),but the rate in the normal control group was only 4. 44%(2/45),and the difference was statistically significant (χ2=14. 42,P<0. 05). The total score of TAS (55. 11±10. 99),factor Ⅰ (20. 62±6. 78) and factor Ⅱ (14. 68±3. 70) in the PD group were higher than those in the control group (42. 93± 9. 25,12. 82± 4. 99,11. 42±3. 04; F=20. 72, 31. 08,15. 31,P<0. 01). The levels of the heartbeat perception were higher in the PD group than that in the control group (0. 75±0. 15,0. 58±0. 19;t=4. 13,P<0. 05). In PD group,the score of STAI were positively correlated with TAS total score and factor Ⅰ and Ⅱ scores( r=0. 57,0. 61,0. 47;r=0. 54,0. 62,0. 39,P<0. 05). There was no significant correlation between the scores of STAI and the level of interoception. The mediating effect of interoception level on alexithymia and state anxiety was not significant while the mediating effect on alexithymia and trait anxiety was also not significant. Conclusions The alexithymia detection rate and interoception sensitivity in patients with panic disorder were higher than those of healthy people. There may be interaction between alexithymia and anxiety symptoms. Interoception may be a clinical feature of panic disorder.

Objective:To investigate the awareness of digestive system injury caused by coronavirus disease 2019 (COVID-19) in gastroenterologists.Methods:From February 21 to 23 in 2020, the electronic questionnaire was used to learn about the condition of the basic knowledge of COVID-19 and awareness of digestive system injury caused by COVID-19 among the gastroenterologists across the country. Chi-square test was used for statistical analysis.Results:A total of 2 216 gastroenterologists from 31 provinces, autonomous regions and municipalities nationwide completed the survey. 99.7% (2 209/2 216) of gastroenterologists stated that they had read the COVID-19 diagnosis and treatment guidelines. The percentages of physicians who knew clearly about the diagnostic criteria of suspected and confirmed cases of COVID-19 was 34.9% (774/2 216) and 39.4% (874/2 216), respectively. The percentages of physician who gave the right answers of COVID-19 detectable methods and pulmonary imaging was 68.4% (1 516/2 216) and 71.6% (1 586/2 216), respectively. The percentages of correct answers of digestive system injury caused by COVID-19 were physicians and chief physicians was 30.9% (134/433) in residents, 33.9% (234/691) attending physicians, 32.4% (213/657) associated chief physicians and 34.9% (152/435) chief physicians, respectively, however there were no statistically significant differences among physicians with different professional titles ( χ2=6.60, P> 0.05). 95.6% (2 119/2 216) of gastroenterologists believed that probiotics could effectively improve bowel function, and 94.0% (2 082/2 216) of gastroenterologists considered that enteral nutrition support could improve patients’ prognosis. Conclusions:The knowledge and dynamic progress of the digestive system injury caused by COVID-19 are still insufficiently grasped by gastroenterologists in China. So it is necessary to carry out systematic and pertinent training programmes for them.

Objective To investigate the changes of cortical thickness and relative resting state functional connectivity in patients with generalized anxiety disorder (GAD).Methods The present study analyzed structural and eyes-open resting state functional MRI were performed in 21 patients with GAD and 22 matched healthy controls.Cortical thickness was estimated with FreeSurfer.The structurally altered regions were defined as region of interest (ROI) to analyze functional connectivity (FC) using resting state functional MRI data by DPABI.Results Cortical thickness of patients with GAD were increased in right rostral middle frontal gyrus (rMFG;MNI:x =27.9,y =53.4,z =-11.1;size:241.93 mm2;FDR corrected,P ＜ 0.1) and right inferior temporal gyrus (IGT;MNI:x =49.7,y =-57.8,z =-8.7;size:138.93 mm2;FDR corrected,P＜0.1) compared with healthy controls.FC between right rMFG and right superior/middle occipital gyrus as well as well as FC between rMFG and right precentral gyrus showed decreased in patients with GAD compared with healthy controls(AlphaSim corrected,P＜0.05).FC between right rMFG and right angular gyrus showed increased in patients with GAD compared with healthy control (AlphaSim corrected,P＜0.05).Conclusion The rMFG may play an important role in the pathophysiology of GAD,which can be used as an stimuli target in physicotherapeutics to improve anxiety symptoms.