LPS和CpG寡聚DNA对单核巨噬细胞的效应和作用机制的研究
发布时间:2022-01-19 03:18
革兰氏阴性细菌胞壁外膜中的脂多糖(LPS)以及细菌DNA和含非甲基化CpG基序的寡聚脱氧核糖核苷酸(CpG ODN)等都被机体当成危险信号,可激活单核巨噬细胞、树突状细胞等抗原提呈细胞合成和分泌多种细胞因子及其它炎症介质。本研究主要探讨了一种新型树突状细胞来源的G蛋白信号转导调节蛋白(DC-RGS)、核受体过氧化体增殖物激活受体(PPAR)及主要组织相容性复合物Ⅱ类分子(MHC-Ⅱ)在LPS和CpG ODN活化单核巨噬细胞等抗原提呈细胞产生细胞因子及一氧化氮(NO)过程中的作用。我们通过基因转染研究发现DC-RGS对LPS诱导人单核细胞THP-1产生细胞因子(TNF-α、IL-1β、IL-6和IL-12p70)具有微调作用,但不影响IL-8的分泌;CpG ODN也具有与LPS相似的脱敏现象而且它们可以互相诱导对方脱敏;脱敏时THP-1分泌IL-8不受抑制;用PPAR的配体和基因转染研究发现PPARα和PPARγ能以配体和转录活性非依赖性机制抑制巨噬细胞RAW264.7产生IL-12p40和NO,但不影响THP-1细胞产生IL-8;脱敏后PPARγ表达增高提示其可能反馈性参与LPS和Cp...
【文章来源】:中国人民解放军海军军医大学上海市 211工程院校
【文章页数】:88 页
【学位级别】:博士
【文章目录】:
Abstract in Chinese
Abstract in English
Introduction
Part I: Identification of a Novel RGS Molecule and Its Tuning Effects on CytokineProduction by Lipopolysaccharide Treated THP-1 Monocytes
Part Ⅱ: Evidence for Activation-independent Repression Mechedsm of PPAR in LPS and CpG ODN responses f Relevance to Desensitization
Part Ⅲ: Modulating Effects of B2l-2, a Monoclonal Anibody Against MHc class II molecules, on Danger Signals-induced NO Production by APCs
Summary
AcknowIedgement
Review: MHC class IIf The antenna fOr danger signals? (A HyPothesis)
本文编号:3596112
【文章来源】:中国人民解放军海军军医大学上海市 211工程院校
【文章页数】:88 页
【学位级别】:博士
【文章目录】:
Abstract in Chinese
Abstract in English
Introduction
Part I: Identification of a Novel RGS Molecule and Its Tuning Effects on CytokineProduction by Lipopolysaccharide Treated THP-1 Monocytes
Part Ⅱ: Evidence for Activation-independent Repression Mechedsm of PPAR in LPS and CpG ODN responses f Relevance to Desensitization
Part Ⅲ: Modulating Effects of B2l-2, a Monoclonal Anibody Against MHc class II molecules, on Danger Signals-induced NO Production by APCs
Summary
AcknowIedgement
Review: MHC class IIf The antenna fOr danger signals? (A HyPothesis)
本文编号:3596112
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