Intestinal mucosal immune disorders determines the development of ulcerative colitis(UC) and impacts of its outcome. Th17 is one of a key pro-inflammatory cytokines in IBD, then Th17 cells and its associated cytokines play an important role in the inflammation process. miRNA-155 / Jarid2 axis play an important role in inprogramming both the Th17 differentiation and the effector phase adjustment process to produce cytokines. Bone Marrow-Derived Mesenchymal Stem Cells (BMSCs) as a new method of treatment which can treat a variety of inflammation-mediated diseases, but stem cell therapy efficacy remains to be improved. Genetically modified BMSCs is the development direction of cell therapy or gene therapy. This paper intends to modify BMSCs with miRNA-155 / Jarid2 silence gene expression, making it directional control of Th17 cell differentiation, and Compound sophorae decoction(Qingreliangxue dampness square )synergistic effect, then control inflammation process, thereby enhancing the efficacy of BMSCs treatment of ulcerative colitis.Through immunohistochemical, molecular biology, this topic studies miRNA-155 / Jarid2 gene-modified BMSCs to regulate intestinal Th17 cell differentiation in the treatment of UC and the synergy of compound sophora soup.It will provide new theoretical basis and research methods for clinical treatment of UC.
肠黏膜免疫紊乱是导致溃疡性结肠炎(UC)发生、发展和影响其转归的决定因素,Th17是UC关键促炎因子,Th17细胞及其相关细胞因子在炎症的进程中发挥重要作用。miR-155/Jarid2轴在Th17分化及效应阶段调节细胞因子产生过程中发挥重要作用。骨髓间充质干细胞(BMSCs)作为一种新的治疗方法能治疗炎症介导的多种疾病,干细胞治疗的疗效有待进一步提高,对BMSCs进行基因修饰,是细胞或基因治疗的发展方向。通过对BMSCs进行miR-155/Jarid2基因表达沉默,从而使其定向控制Th17细胞分化,复方苦参汤(清热燥湿凉血方)起到协同作用,控制炎症进程,从而提高BMSCs治疗UC的疗效。本课题通过免疫组化、分子生物学等方法,研究基因沉默miR-155/Jarid2修饰后的BMSCs调控Th17细胞分化治疗UC及复方苦参汤的协同作用,为开拓该病的临床治疗手段提供新的理论依据和研究方法。
肠黏膜免疫紊乱是导致溃疡性结肠炎(UC)发生、发展和影响其转归的决定因素,Th17是UC关键促炎因子,Treg是关键的抑炎因子,Th17/Treg平衡在UC肠道炎症的进程中发挥重要作用。据报道,在UC患者及实验性结肠炎结肠组织中miR-155显著上调,miR-155/Jarid2轴在影响Th17及Treg细胞分化及效应阶段调节细胞因子产生过程中发挥重要作用。骨髓间充质干细胞(BMSCs)作为一种新的治疗方法能治疗炎症介导的多种疾病,干细胞治疗的疗效有待进一步提高,对BMSCs进行基因修饰,是细胞或基因治疗的发展方向。因此,本课题探讨了miR-155/Jarid2在UC中的调节机制,以及对BMSCs进行基因修饰后对UC的治疗作用研究,复方苦参汤(清热燥湿凉血方)协同调节Th17/Treg平衡,控制炎症进程,从而提高治疗UC的疗效。动物实验结果表明,miR-155可以靶向抑制Jarid2;抑制miR-155表达,可以缓解DSS及TNBS诱导的老鼠结肠炎,升高Jarid2表达,从而抑制Th17分化及功能,促进Treg分化及功能,Notch1或Wnt/β-catenin信号通路参与此调节过程;细胞实验结果表明,miR-155抑制剂可以促进T细胞向Treg分化而抑制其向Th17细胞分化,复方苦参汤含药学清可以协同miR-155抑制剂发挥作用。慢病毒介导的CXCR4和IL-35在BMSCs中过表达显着增加了TNBS诱导的结肠炎大鼠中BMSCs向发炎结肠的迁移。此外,CXCR4-IL-35-BMSC通过同时促进Treg和抑制Th17细胞分化及其功能,显着增强了BMSC的免疫调节活性。复方苦参汤的给药可降低炎症因子白介素(IL)-1β,肿瘤坏死因子(TNF)-α和磷酸化NF-κBp65的水平,并降低脾脏和淋巴结中Th17细胞的比例及其表达和结肠组织中ROR-γt、IL-17A、STAT3、IL-6的表达;而上调脾脏和淋巴结中Treg细胞的百分比和FOXP3,结肠组织中转化生长因子(TGF)-β1和IL-10的表达。复方苦参汤可通过调节DSS诱导的结肠炎小鼠的Th17 / Treg细胞平衡,显着改善结肠炎小鼠的症状和病理损害,并影响免疫功能。由此说明,miR-155抑制及复方苦参汤可能是治疗UC的新方法;通过慢病毒介导的CXCR4和IL-35双基因转染修饰BMSCs可能是基于细胞治疗
{{i.achievement_title}}
数据更新时间:2023-05-31
Efficient photocatalytic degradation of organic dyes and reaction mechanism with Ag2CO3/Bi2O2CO3 photocatalyst under visible light irradiation
DeoR家族转录因子PsrB调控黏质沙雷氏菌合成灵菌红素
Empagliflozin, a sodium glucose cotransporter-2 inhibitor, ameliorates peritoneal fibrosis via suppressing TGF-β/Smad signaling
An alternative conformation of human TrpRS suggests a role of zinc in activating non-enzymatic function
Baicalin provides neuroprotection in traumatic brain injury mice model through Akt/Nrf2 pathway
miR-155通过组蛋白H3K27me3表观遗传修饰调控溃疡性结肠炎Th17/Treg分化的免疫机制及复方苦参汤的协同作用
复方苦参汤协同干细胞微囊泡运载PD-L1治疗溃疡性结肠炎的机制研究
EphB2/ephrin-B1通路介导BMSC-EVs在溃疡性结肠炎中的免疫调节机制及复方苦参汤协同作用研究
HSPA5/HSPA1A泛素化蛋白降解途径在溃疡性结肠炎中的作用机制及复方苦参汤的干预作用研究