Enhanced IL-10 production in response to hepatitis C virus proteins by peripheral blood mononuclear cells from human immunodeficiency virus-monoinfected individuals.

Enhanced IL-10 production in response to hepatitis C virus proteins by peripheral blood mononuclear cells from human immunodeficiency virus-monoinfected individuals.
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通过人类免疫缺陷病毒 - 单人感染个体的外​​周血单核细胞对乙型肝炎病毒蛋白的响应增强了IL-10的产生。

DOI:
10.1186/1471-2172-9-28
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发表时间:
2008-06-13
期刊:
影响因子:
3
通讯作者:
Grant, Michael
Grant, Michael
中科院分区:
医学4区
文献类型:
--
作者:
Barrett, Lisa;Gallant, Maureen;Howley, Constance;Bowmer, M. Ian;Hirsch, Geri;Peltekian, Kevork;Grant, Michael

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已经提出了 HCV 建立慢性感染的多种免疫逃避策略,包括操纵细胞因子反应。既往感染 HIV 会增加慢性 HCV 感染的可能性,并加速 HCV 相关发病率的发展。因此,我们研究了未感染、HIV 感染、HCV 感染和 HIV/HCV 合并感染个体的外​​周血单核细胞 (PBMC) 中 HCV 结构和非结构蛋白的体外细胞因子反应。使用细胞内流式细胞术评估新鲜分离的 PBMC 与重组 HCV 核心、非结构蛋白 3 (NS3) 和 NS4 蛋白孵育 16 小时后产生的 IL-2、IL-10、IL-12 和 IFN-γ。通过 3 H-胸苷增殖测定评估 HIV/HCV 共感染个体的抗 HCV 细胞反应。暴露于 HCV 抗原会增加 PBMC 产生 IL-10,尤其是在未感染者和 HIV 单一感染者中。这种 IL-10 反应在慢性 HCV 感染中减弱,即使是 HCV/HIV 合并感染也是如此。体外响应 HCV 蛋白产生 IL-10 的细胞与最近显示在体内组成型产生 IL-10 的 PBMC 子集相匹配。在接触 HCV 蛋白之前,在未感染、HIV 感染、HCV 感染和 HIV/HCV 合并感染个体中发现该子集的频率相似。仅在一名 HIV/HCV 共感染个体中检测到 HCV 特异性 T 细胞增殖,该个体未表现出 HCV 诱导的 IL-10 反应。这种模式表明,在未感染个体中,特别是在 HIV 单感染个体中,选择性诱导 IL-10 在建立慢性 HCV 感染中发挥作用,相反,一旦建立慢性感染,这种反应的减弱有利于肝脏免疫病理学的发展。
Multiple immune evasion strategies by which HCV establishes chronic infection have been proposed, including manipulation of cytokine responses. Prior infection with HIV increases the likelihood of chronic HCV infection and accelerates development of HCV-related morbidity. Therefore, we investigated in vitro cytokine responses to HCV structural and non-structural proteins in peripheral blood mononuclear cells (PBMC) from uninfected, HIV-infected, HCV-infected and HIV/HCV-coinfected individuals. Intracellular flow cytometry was used to assess IL-2, IL-10, IL-12, and IFN-γ production by freshly isolated PBMC incubated for 16 hours with recombinant HCV core, non-structural protein 3 (NS3), and NS4 proteins. Anti-HCV cellular responses were assessed in HIV/HCV-coinfected individuals by 3H-thymidine proliferation assay. Exposure to HCV antigens increased IL-10 production by PBMC, especially in uninfected and HIV-monoinfected individuals. This IL-10 response was attenuated in chronic HCV infection even with HCV/HIV-coinfection. The cells producing IL-10 in response to HCV proteins in vitro matched a PBMC subset recently shown to constitutively produce IL-10 in vivo. This subset was found at similar frequencies in uninfected, HIV-infected, HCV-infected and HIV/HCV-coinfected individuals before exposure to HCV proteins. HCV-specific T cell proliferation was detectable in only one HIV/HCV-coinfected individual who demonstrated no HCV-induced IL-10 response. This pattern suggests that selective induction of IL-10 in uninfected individuals and especially in HIV-monoinfected individuals plays a role in establishing chronic HCV infection and conversely, that attenuation of this response, once chronic infection is established, favours development of hepatic immunopathology.
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发表时间: 2002-01-07
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