The inheritance of prestigious TCM doctors' experiences is not only important for improving the level of health protection and developing the academic level of TCM in our country, but also an urgent research topic that need to be worked on. In this paper, the contents and methods of research on the inheritance of prestigious TCM doctors' experiences are discussed. There are three main research issues: the clinical experiences, the academic thoughts, and the ethics of prestigious TCM doctors. And when doing research on the methods, these problems should be paid attention to: study prestigious TCM doctors' clinical experiences, academic thoughts and ethics at the same time; start the research with trying to find a doctor's own character by comparison; understand the origin and development of a doctor's academic thought from the culture background; pay attention to the process of making tacit knowledge explicit; do more researches on the evaluation, promotion and application of prestigious TCM doctors' experiences based on EBM (evidence-based medicine).

Objective To investigate protective activity against Aβ25-35-induced cytotoxicity in PC12 cells of different extracts and ursolic acid, which were isolated from pyrola decorata. Methods Aβ25-35-induced cytotoxicity in PC12 cells was established as the model in vitro. The cultured PC12 cells were divided into blank control group, DMSO control group, model control group, different extract groups of pyrola decorate and ursolic acid(UA) group. The different extract groups included ether extract (PE), acetidin extract (AE), n-butanol extract (BE), the water extract (WE), 50% ethanol extract (HEE). MTT assay was used to test the optimum concentration, and the number of viable cells in culture medium was measured by ELISA at 490 nm wavelength. Results The cell viabilities in different extracts groups(PE, AE, BE, WE, HEE) were respectively 89.3%, 77.2%, 79. 2%, 75. 1% ,74. 0% at the concentration of 5. 0 mg ? mL-1 . Moreover, ursolic acid showed the best neuroprotective activity (88.9%) at the concentration of 500 μg?L-1 . Compared with model control group, the survival rate of each group was remarkably increased, and the protective activities of PE and UA were more significant among them. Conclusion Different polar extracts of pyrola decorata and isolated ursolic acid have neuroprotective effects on Aβ25-35-induced cytotoxicity in PC12 cells in certain degrees.

Objective To investigate the inhibitory effect of thalidomide on angiodysplasia.Methods Excisional intestinal specimens were collected and immunohistochemical examination was carried out.The human umbilical vein endothelial cells were cultured in vitro to exponential phase of growth,divided into six groups and synchronized for 24 hours.They were then stimulated with thalidomide (40-100 μg/ml) for 72 hours.MTT assay was used to assess cellular proliferation.ELISA,real-time quantitative PCB and western blot were applied to detect the expression of VEGF/HIF-1α of human umbilical vein endothelial cells (HUVEC).Results Immunohistochemical analysis of intestinal pathological specimens demonstrated higher expression of VEGF.ELISA showed that the expression of VEGF under hypoxia was obviously higher than that under normoxia [ ( 1199.3 ± 61.4) ng/L vs ( 864.7 ± 41.2 ) ng/L,P < 0.05 ].Real-time quantitative PCR and Western blot discovered that thalidomide inhibited the expression of VEGF/ HIF-1α of HUVEC (P < 0.05).The effect of thalidomide was dose-dependent.Conclusions Thalidomide can suppress the expression of HIF-1α and VEGF in HUVEC in vitro and then inhibit angiodysplasia,which may play a significant role in stopping the rebleeding in patients with recurrent gastrointestinal bleeding.

Background: Despite the decline in prevalence of Helicobacter pylori infection, peptic ulcer remains a major health burden in China. Aims: To investigate the trends of peptic ulcer in recent years, especially the changes of Helicobacter pylori-positive peptic ulcer, and to provide a theoretical basis for the prevention and treatment of peptic ulcer. Methods: Gender, age, and Helicobacter pylori status of patients diagnosed as peptic ulcer by gastroscopy from January 2013 to December 2019 at Shanghai Renji Hospital were retrospectively reviewed, and clinical and epidemiological characteristics were analyzed. Results: During the study period, peptic ulcer was found in 40 385 of the 383 413 patients undergoing gastroscopy, including gastric ulcer 15 114 patients and duodenal ulcer 25 271 patients. The ratio of male to female of peptic ulcer patients was 2.02:1. Helicobacter pylori was present in 60.0% of peptic ulcer patients (48.5% in gastric ulcer, 66.9% in duodenal ulcer). The detection rate of Helicobacter pylori-positive peptic ulcer was decreased with the increasing year of patients. The detection rate of Helicobacter pylori-positive gastric ulcer declined from 52.2% to 49.3% during 2013 to 2019, and Helicobacter pylori-positive duodenal ulcer from 70.0% to 63.9%. Conclusions: With the decrease of Helicobacter pylori infection rate, the incidence of Helicobacter pylori-positive peptic ulcer, especially duodenal ulcer, decreased significantly, and the incidence of non-Helicobacter pylori ulcer increased, which should be paid more attention.

Objective:To investigate the correlation of endoscopy findings with symptoms in patients undergoing gastroscopy.Methods:Patients who underwent gastroscopy for the first time in Renji Hospital of Shanghai Jiao Tong University School of Medicine from January to December 2017 were included in the questionnaire survey. The participants were asked to report their main symptoms of the digestive tract in details, and gastroscopy was completed within 2 weeks. Final gastroscopic diagnosis was made based on both gastroscopy and pathology, then patients were divided into the major-lesion (peptic ulcer and malignancy) group and the non-major-lesion (chronic gastritis, reflux esophagitis and others) group. The correlation of gastrointestinal symptoms with gastroscopic findings was analyzed. The risk for major gastroscopic lesions (peptic ulcer and malignant tumors) was assessed by multivariate Logistic regression analysis.Results:A total of 5 885 patients completed the questionnaire, 5 496 (93.4%) of whom completed gastroscopy. The detection rates of peptic ulcer were 12.3% (373/3 028), 12.6% (52/412), 17.9% (49/273), 9.5% (64/675) and 9.2% (102/1 108) in patients with dyspepsia, reflux, alarm, other symptoms and no symptoms, respectively, the detection rates of malignant tumors were 1.2% (36/3 028), 0.7% (3/412), 7.7% (21/273), 0.7% (5/675) and 0.4% (4/1 108), respectively in these patients. The most common symptoms was dyspepsia, accounted for 58.3% (373/640) and 52.2% (36/69) patients with peptic ulcer and malignant tumors, respectively. Alarm symptoms were found in 30.4% (21/69) patients with malignant tumors, and 15.9% (102/640) peptic ulcer patients and 5.8% (4/69) malignant tumor patients had no gastrointestinal symptoms. Compared to asymptomatic individuals, patients with dyspepsia ( P<0.001, OR=1.52, 95% CI: 1.21-1.92) and those with warning symptoms ( P<0.001, OR=2.87, 95% CI: 2.02-4.08) had significantly increased risk for major lesions (peptic ulcer and malignant tumors) detected by gastroscopy. Conclusion:Although dyspepsia and alarm symptoms are positively associated with upper gastrointestinal malignancy and peptic ulcer, they are of limited predictive value for upper gastrointestinal diseases.