Objective To explore the role and possible mechanism of transforming growth factor (TGF)-β autocrine in CDH17 regulating invasion of gastric cancer cells.Methods Construction and transfection of siRNA-CDH17 into MKN-45 gastric cancer cell line to silence the expression of CDH17.Expression of TGF-β and concentrations of TGF-β in supernatants were detected before and after CDH17 silence by immunofluorescence,immunoblotting and ELISA.The autocrine situation of TGF-β was observed.Meanwhile,the activation of TGF-β/Smad3 signaling pathway was also detected by immunoblot.After giving signaling pathway inhibitor,the changes of invasion ability of MKN-45 cells were observed by Transwell invasion experiment.The role of TGF-β autocrine and related signaling pathway activation in CDH17-regulated invasion of gastric cancer cells was evaluated.Results After transfecting siRNA-CDH17 for silencing CDH17 expression in MKN-45 cells,the expression of TGF-β was significantly decreased compared with non-transfection group,its concentration in supernatants was also significantly reduced[(510 ±55)pg/mL vs.(115±20) pg/mL,P<0.01].The immunoblots revealed that phosphorylation level of Smad3 after CDH17 silence was also significantly diminished.However,giving the TGF-β/Smad3 signaling inhibitor SIS3 (10 μmol/L) could also suppress the phosphorylation level of Smad3 when CDH17 was highly expressed,meanwhile silencing CDH17 and inhibiting Smad3 phosphorylation could significantly decrease the invasion of MKN-45 gastric cancer cells (P<0.05).Conclusion CDH17 could participate in the invasion of gastric cancer cells by promoting TGF-β autocrine to activate TGF-β/Smad3 signaling pathway.

Objective To investigate the clinical results and prognosis between proximal and total gastrectomy in proximal advanced gastric cancer.Methods The clinicopathological data of 221 patients with proximal advanced gastric cancer who undcrwent radical gastrectomy were retrospectively analyzed.82 patients and 139 patients underwent proximal and total gastrectomy respectively.The number of dessected lymph nodes,postoperative complications and mortality were compared.Kaplan-Meier survival rate curves and Log-rank test were drawn and compared.Results A total of 1 411 (11-34) and 3 345 (14-35) lymph nodes were harvested from the surgical specimens of 82 and 139 patients with proximal and total gastrectomy respectively,the average number of harvested lymph nodes was 17 ± 11 and 24 ± 10 (t =2.586,P ＜0.05).The overall complications in proximal gastrectomy were higher than total gastrectomy (73.2％ vs.30.2％,x2 =38.291,P ＜0.01).The ratio of functional delayed gastric emptying,anastomotic leakage and stenosis,reflux esophagitis in proximal gastrectomy patients was higher than total gastrectomy.The survival rate in proximal gastrectomy were lower than total gastrectomy in proximal advanced gastric cancer (P ＜0.01).Conclusion Total gastrectomy is recommended for proximal advanced gastric cancer.

Objective To observe therapeutic effect in the near future of the operation of vertebrascope in route of retreat to treat lumbar disc protrusion and complications.Method According to symptoms,signs,myelography and CTM results to determine protrusion interspace and side type,applied the operation of vertebrascope in route of retreat to treat lumbar disc protrusion and perform functional exercises.Results 86 patients were followed up,and within these patients,58 appeared excellent (67% ),25 appeared good (29% ), 2 appeared not bad (2% ),and 1 appeared bad(1% ).Conclusion The technology has many advantages, such as little wound, little hemorrhage, little pain and fast restoration,which provide advantageous conditions for early functional exercises after operation.

Objective To explore the utilization and effectiveness of ultrasound screening for neural tube defects (NTDs),so that to provide scientific evidences for the secondary prevention of NTDs.MethodsFour hundred and fifty-nine women who delivered or gestated NTDs babies or fetuses were randomly selected from Shandong Province and Shanxi Province,and the related information was collected with structured questionnaire by trained interviewers.Results Of the 459 cases,the ultrasonography utilization rate was 98.7%,and 6 cases (1.3%) never took examinations by ultrasonography during the whole pregnancy period.The total diagnosis rate of ultrasound screening for NTDs was 85.9%,and those of anencephalus,spina bifida and encephalocele were 96.4%,79.6% and 73.8% respectively (P<0.05).The average diagnosis week of NTDs was 24.0 and those of anencephalus,spina bifida and encephalocele were 21.2,27.1 and 24.7 respectively (P<0.05).The detection rates of NTDs before 16 weeks,16-20 weeks,20-24 weeks,24-28 weeks and after 28 weeks were 14.1%,49.4%,46.3%,49.2% and 52.1% respectively (P<0.05).The detection rates of NTDs in hospitals,maternal and child care service centers and family planning centers were 46.4%,52.0% and 28.1% respectively (P<0.05).The detection rate of NTDs by two-dimensional ultrasound equipment was 41.3% and 83.3% by three-dimensional ultrasound equipment (P>0.05).Conclusions The detection rates of NTDs and the subtypes by ultrasonography are low at different pregnant periods and in different medical institutions.It is important to increase the utilization rate of ultrasound screening by pregnant women and improve the NTDs diagnostic level of primary health care institutions,so that to improve the efficacy of secondary prevention strategy for NTDs in China.

Antibiotic-associated diarrhea(AAD) is a frequent adverse effect of antibiotic in children.AAD is associated with longer hospitalization, higher healthcare cost and even lead to death.Pediatricians usually do not pay enough attention to AAD.Domestic experts from pulmonary medicine, infection and gastroenterology are organized to develop the consensus, to improve the diagnosis, treatment and prevention of AAD, and contribute the children health in future.

Diabetes mellitus with ketoacidosis and combined with coma are acute critical complications, which can be complicated with acute abdomen, such as acute pancreatitis, mesenteric thrombosis, small intestine necrosis, etc. There is no report of massive intestine necrosis in the previous literature. We present an overview and aim to improve the diagnosis of acute complications in diabetes mellitus combined with acute abdomen.

Objective To explore the effect of different treatment methods on prognosis in elderly patients with lower extremity arterial occlusive disease.Methods A total of 352 elderly patients with lower extremity arterial occlusive disease admitted in our hospital from May 2020 to May 2022 were enrolled,and according to their willingness and characteristics of lower extremity le-sions,they were divided into balloon dilation group(142 patients),stent implantation group(145 patients)and conservative treatment group(65 patients).All patients were followed up for 13-24 months.The incidences of major adverse cardiovascular events(MACE),including all-cause death,acute myocardial infarction,acute ischemic stroke,and major adverse lower limb events(MALE),including lower extremity pain at rest,ulcers or skin defects,gangrene,reocclusion,and amputation were observed and recorded.The clinical data and prognosis were compared and ana-lyzed of the three groups.Kaplan-Meier survival curves were drawn.Results The incidence of all-cause mortality was significantly lower in the stent implantation group than the conservative treatment group(9.7％vs 23.1％,P＜0.01).The incidence of MALE was obviously lower in the stent implantation group and the balloon dilatation group than the conservative treatment group(4.8％and 9.2％vs 24.6％,P＜0.01).Conclusion Endovascular therapy can reduce the risk of all-cause death and MALE occurrence in elderly patients with lower extremity arterial occlusive disease who are suitable for interventional therapy.

【Objective】 To explore the status quo and influencing factors of knowledge, attitude and practice of voluntary blood donation among undergraduates in Beijing. 【Methods】 A questionnaire was designed on the basis of literature, using the method of convenience sampling to survey the undergraduates from 39 universities in Beijing. The t-test, analysis of variance and χ² test were used to compare the differences in knowledge, attitude and practice of voluntary blood donation among different groups, and logistic regression model was performed to analyze the influencing factors. 【Results】 A total of 1 075 valid questionnaires were collected from undergraduates of 39 universities in Beijing. The results showed that the proportion of the participants who had good knowledge about voluntary blood donation was 69.21% (744/1 075). No statistically significant difference was noticed on the scores of voluntary blood donation knowledge between males and females (P>0.05). The scores of voluntary blood donation knowledge of medical students were higher than those of other subjects (P<0.05). The scores of voluntary blood donation knowledge of juniors and above were higher than those of lower grades (P<0.05). The rate of undergraduates participating voluntary blood donation in Beijing was 30.98% (333/1 075). A total of 67.26% (723/1 075) of students had donation intention, 9.49% (102/1 075) didn’t and 23.25% (250/1 075) were not sure. No statistically significant differences in blood donation intention were observed among undergraduates by genders and grades (P>0.05). The rate of medical students’ intention to donate blood was higher than that of other subjects (P<0.05). 【Conclusion】 The rate of voluntary blood donation among undergraduates in Beijing was above the middle level compared with other regions in China, but the practice of voluntary blood donation is far away from the intention. Therefore, it’s necessary to improve the level of knowledge, attitude and practice of undergraduates, especially non-medical college students, so as to improve the rate of voluntary blood donation among the undergraduates in Beijing.