Characterization of HCV-specific CD4+Th17 immunity in recurrent hepatitis C-induced liver allograft fibrosis.

Characterization of HCV-specific CD4+Th17 immunity in recurrent hepatitis C-induced liver allograft fibrosis.
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DOI:
10.1111/j.1600-6143.2011.03458.x
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发表时间:
2011-04
期刊:
American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons
影响因子:
--
通讯作者:
Mohanakumar T
Mohanakumar T
中科院分区:
其他
文献类型:
--
作者:
Basha HI;Subramanian V;Seetharam A;Nath DS;Ramachandran S;Anderson CD;Shenoy S;Chapman WC;Crippin JS;Mohanakumar T

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原位肝移植(OLT)后丙型肝炎病毒(HCV)复发并加速纤维化是一种普遍现象。为了评估 HCV 诱导的同种异体移植物纤维化/肝硬化的机制,我们利用 51 名 HCV+ OLT 受者、15 名健康对照者和 9 名 HCV-OLT 受者研究了 HCV 特异性 CD4+Th17 细胞及其在 OLT 受者中复发的诱导情况。通过 ELISpot 分析分泌 IFN-γ、IL-17 和 IL-10 的 HCV 特异性 CD4+ T 细胞的频率。通过 LUMINEX 分析血清细胞因子和趋化因子。患有复发性 HCV 诱导的同种异体移植炎症和纤维化/肝硬化的受者表现出 HCV 特异性 CD4+Th17 细胞频率显着增加。发现促炎介质(IL-17、IL-1β、IL-6、IL-8、MCP-1)增加,IFN-γ 减少,IL-4、IL-5 和 IL-10 水平增加。患有同种异体移植炎症和纤维化/肝硬化的 OLT 受者表现出 Foxp3+ 调节性 T 细胞 (Treg) 的频率增加,这些细胞抑制 HCV 特异性 CD4+Th1,但不抑制 Th17 细胞。这表明 OLT 受者中反复感染 HCV 会诱导炎症环境,其特征是 IL-6、IL-1β 增加和 IFN-γ 减少,从而促进 HCV 特异性 CD4+Th17 细胞的诱导。这些细胞对 Tregs 的抑制具有抵抗力,并可能介导炎症级联反应,导致 HCV 复发后 OLT 接受者出现肝硬化。
Hepatitis C Virus (HCV) recurrence with accelerated fibrosis following orthotopic liver transplantation (OLT) is a universal phenomenon. To evaluate mechanisms contributing to HCV induced allograft fibrosis/cirrhosis, we investigated HCV specific CD4+Th17 cells and their induction in OLT recipients with recurrence utilizing 51 HCV+ OLT recipients, 15 healthy controls and 9 HCV- OLT recipients. Frequency of HCV specific CD4+ Tcells secreting IFN-γ, IL-17 and IL-10 was analyzed by ELISpot. Serum cytokines and chemokines were analyzed by LUMINEX. Recipients with recurrent HCV induced allograft inflammation and fibrosis/cirrhosis demonstrated a significant increase in frequency of HCV specific CD4+Th17 cells. Increased pro-inflammatory mediators (IL-17, IL-1β, IL-6, IL-8, MCP-1), decreased IFN-γ, and increased IL-4, IL-5 and IL-10 levels were identified. OLT recipients with allograft inflammation and fibrosis/cirrhosis demonstrated increased frequency of Foxp3+ regulatory T cells (Tregs) that inhibited HCV specific CD4+Th1 but not Th17 cells. This suggests that recurrent HCV infection in OLT recipients induces an inflammatory milieu characterized by increased IL-6, IL-1β and decreased IFN-γ which facilitates induction of HCV specific CD4+Th17 cells. These cells are resistant to suppression by Tregs and may mediate an inflammatory cascade leading to cirrhosis in OLT recipients following HCV recurrence.
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。
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