To reveal the anti-inflammation mechanism of koumine,we determined effects of different concentrations of koumine(100,200,400 mg/L) on the secretion of NO,IL-1β,IL-6 and TNF-a by nitrate reductase and ELISA as well as the mRNA of iNOS,IL-1β,IL-6 and TNF-α.Western blot was used to detect iNOS protein expression.The results showed that 100,200,400 mg/L of koumine can significantly inhibit the secretion of NO,IL-1β,IL-6 and TNF-α of RAW264.7 cell (P＜0.01).Koumine can dose-dependently down-regulate the mRNA of iNOS,IL-1β,IL-6 and TNF-α,meanwhile koumine can also significantly inhibit the protein expression of iNOS.The results indicated that koumine may play an anti-inflammation activity by mean of the reduction of NO and mediator of inflammation,down-regulating the mRNA expression of iNOS,IL-1β,IL-6 and TNF-a,decreasing protein expressions of iNOS.

COVID-19 is a public health emergency currently. In this study, a scale-free network model is established based on the Spring Migration data in 2020.The cities is clustered into three different modules. The epidemic of the cities in the black module was the most serious, followed by the red and the cyan. The black module contains 9 cities in Zhejiang province and 8 cities in Guangdong province, most of them located in the southeast coastal economic belt. These cities should be the key cities for epidemic prevention and control.

Objective:To explore the clinical and endoscopic features of patients with autoimmune gastritis (AIG) and to improve the accuracy of clinical diagnosis of AIG.Methods:From January 3, 2020 to November 25, 2021, the general information (gender, age), laboratory examination indicators and endoscopic findings of 179 AIG patients diagnosed at the Second Affiliated Hospital of Chongqing Medical University were retrospectively analyzed. The laboratory examination indicators included hemoglobin, gastrin-17, pepsinogen (PG), anemia combination indicators (ferritin, vitamin B 12), thyroid function indicators (thyroid-stimulating hormone, thyroglobulin antibody and thyroid peroxidase antibody), Helicobacter pylori, and anti-parietal cell antibody and anti-intrinsic factor antibody. Descriptive methods were used for statistical analysis. Results:Among the 179 AIG patients, there were 42 males (23.5%) and 137 females (76.5%), with an average age of (55.23±12.04) years old. The gastrin-17 level of AIG patients was 195.31 ng/L (143.64 ng/L, 273.61 ng/L), PG Ⅰ level and PG Ⅰ/PG Ⅱ ratio were 12.40 μg/L (7.65 μg/L, 19.40 μg/L) and 1.03 (0.66, 1.52), respectively. There were 15.3% (18/118) of the AIG patients with iron deficiency anemia, and 16.1% (19/118) with megaloblastic anemia. The positive rate of anti-parietal cell antibody was 71.8% (51/71), and the positive rate of anti-intrinsic factor antibody was 25.4% (18/71). The serum thyroid-stimulating hormone level increased in 27.3% (15/55) of the patients, and the positive rates of thyroglobulin antibody and thyroid peroxidase antibody were 31.6% (12/38) and 47.4% (18/38), respectively. The positive rate of Helicobacter pylori was 29.7% (38/128). The endoscopic appearance of AIG indicated reverse atrophy, characterized by obvious atrophy in gastric fundus and gastric body mucosa, however the atrophy of gastric antrum was not obvious. Under endoscopy yellow-white turbid mucus, which was difficult to be washed, was found in 67.0% (120/179) of the patients, and under endoscopy the residual gastric fundus glands could be seen in 19.6% (35/179) of the patients. Among 179 AIG patients, 7 cases (3.9%) of neuroendocrine tumor (NET), 7 cases (3.9%) of early gastric adenocarcinoma (including 1 case of poorly differentiated adenocarcinoma), 1 case (0.6%) of adenoma, and 14 cases (7.8%) of hyperplastic polyps were found. Except for the case of poorly differentiated adenocarcinoma undergoing surgery, the others were treated with endoscopic resection. Conclusions:When unexplained iron deficiency anemia, megaloblastic anemia, or reverse atrophy is found, AIG should be considered. AIG patients are at high risk for gastric cancer and NET, and should be closely followed up, and active treatment should be given before anemia and neurological symptoms appear.

COVID-19 is a public health emergency currently. In this study, a scale-free network model is established based on the Spring Migration data in 2020.The cities is clustered into three different modules. The epidemic of the cities in the black module was the most serious, followed by the red and the cyan. The black module contains 9 cities in Zhejiang province and 8 cities in Guangdong province, most of them located in the southeast coastal economic belt. These cities should be the key cities for epidemic prevention and control.

Humans ; COVID-19 ; HIV Infections/drug therapy* ; Risk Factors

Digestive tract tumors are currently one of the most common types of cancer,including esophageal cancer,gastric cancer,hepatocellular carcinoma,pancreatic cancer,and colorectal cancer.Their prognoses are poor and the treatments require further improvement.Caveolin-1(CAV1)has a dual regulatory effect on digestive tract tumors as a tumor suppressor and cancer promoter.CAV 1 plays a major role in cell proliferation,invasion,metastasis,angiogenesis,and drug tolerance of digestive tract tumors.The regulation of CAV1 protein and its related signaling pathways may be a strategy for the treatment of digestive tract tumors.This review analyzes the relationship between CAV 1 and digestive tract tumors in terms of structure,function,expression regulation,regulation of epithelial-mesenchymal transition,and drug resistance in digestive tract tumors to provide new ideas for the diagnosis and treatment of digestive tract tumors.

Objective To screen long non-coding RNA(lncRNA)associated with disulfidptosis and investigate the immune landscape between lncRNA and pancreatic cancer,for effective guidance in clinical practice.Methods The normal and pancreatic cancer tissue samples were obtained from The Cancer Genome Atlas database,and the lncRNA associated with disulfidptosis was identified based on the Cox and LASSO regression analyses.A risk prognosis model was constructed,and its predictive performance was verified using comprehensive methods.An accurate nomogram was construted to predict the prognosis of patients with pancreatic cancer.The biological differences were analyzed via Gene Ontology,Gene Set Enrichment Analysis,and an immunoassay.The immunotherapy response was estimated using the tumor mutational burden(TMB)score.Results A total of 251 disulfidptosis-related lncRNAs were successfully identified,and three groups of lncRNAs were selected as the reference for the risk model.Pathway analysis showed that immune-related pathways were associated with disulfidptosis-related lncRNA risk models.The risk score was significantly correlated with immune cell infiltration and the ESTIMATE score.Patients with higher risk scores had elevated TMB,indicating that high-risk patients exhibited a better immune checkpoint blockade response.Conclusion The findings of this study contribute to a deeper understanding of disulfidpto-sis-related lncRNA and provide a potential therapeutic strategy for pancreatic cancer.