This study was performed to explore the therapeutic effect of Xiezhuo Jiedu Formula on ulcerative colitis rats and its effects on β-catenin/FOSL2/ARID5A signaling pathway and macrophage polarization.Rats of ulcerative colitis was induced and divide into control group,model group,positive group(intervention with sulfasalazine),and low,medium and high-dose groups(intervention with Xiezhuo Jiedu Fang).After 14 days of intervention,the disease activity index(DAI)and colon mucosa damage index(CDMI)were calculated and used to evaluate the state of rats.HE staining was used to observe lesion tissue;ELISA was used to detect of serum levels of TNF-α and IL-6;flow cytometry was used to detect peripheral blood M1 and M2 macrophage content;RT-PCR was used to detect the mRNA expression of iNOS,CD206,and β-Catenin/FOSL2/ARID5A;immunohistochemistry was used to detect β-Catenin/FOSL2/ARID5A signaling pathway protein expression in colon tissue.Data showed that DAI score,CMDI score,and serum TNF-α and IL-6 in the low,medium,and high dose groups were significantly lower than the model group(P＜0.05).HE staining showed that the colon tissue damage and inflammatory infiltration in the low,medium,and high dose groups were slighter than those in the model group(P＜0.05).The rate of M1 type macrophages and iNOS mRNA in the low,medium,and high dose groups were significantly lower than those in the model group,while the rate of M2 type macrophages and CD206 mRNA were significantly higher than those in the model group(P＜0.05).The mRNA and protein expressions of β-catenin and FOSL2 in colon tissue of low,medium,and high dose groups were significantly higher than those of the model group,while the mRNA level and protein expression of ARID5A were significantly lower than that of the model group(P＜0.05).Taken together,Xiezhuo Jiedu formula can effectively alleviate the clinical symptoms,reduce inflammatory response,downregulate β-catenin/FOSL2/ARID5A expression,regulate macrophage polarization and promote disease recovery of ulcerative colitis in rats.

Objective To comprehensively analyze the epidemiological characteristics and resistance mechanisms of New Delhi metallo-β-lactamase(NDM)-positive multidrug-resistant bacteria in China.Methods Relevant literatures on NDM-positive multidrug-resistant bacteria discovered in China were searched in the CNKI and PubMed databases(publications from January 1,2017 to December 31,2023).The epidemiological analysis was conducted on the types of NDM-positive bacterial strains,their regional distribution,infection sources,resistance profiles,and transfer mechanisms.Results A total of 118 eligible articles were collected,reporting 1627 NDM-positive bacterial strains.The number of reports increased annually from 2011 to 2019,but began to decline annually from 2020 onwards.NDM-1 and NDM-5 were the most commonly reported variants.The highest number of reports came from Eastern China,followed by Central China and North China.The primary pathogens were Klebsiella pneumoniae,Escherichia coli,and Enterobacter cloacae.The age distribution of patients with NDM-positive infections showed distinct patterns,with neonates and children accounting for 27.25％and patients over 50 years old accounting for 49.57％.The majority of positive bacterial infections came from sputum(38.28％),urine(28.94％),and blood(23.28％).The main departments reporting NDM-positive bacteria were the ICU(39.93％)and pediatrics(20.14％).These resistant bacteria exhibited resistance to more than 50.00％of antibiotics,with lower resistance to colistin and tigecycline(below 30.00％).The predominant plasmid type carrying the blaNDMwas IncX3,and the insertion sequences upstream and downstream of the blaNDM showed diversity.Conclusion NDM-positive multidrug-resistant bacteria are widely prevalent across regions in China,exhibiting multidrug-resistance.This poses significant challenges to clinical antibiotic selection and necessitates the development of effective countermeasures.