The immunosuppressive role of IL-32 in lymphatic tissue during HIV-1 infection.

The immunosuppressive role of IL-32 in lymphatic tissue during HIV-1 infection.
复制标题

DOI:
10.4049/jimmunol.1100277
复制
发表时间:
2011-06-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Haase AT
Haase AT
中科院分区:
其他
文献类型:
--
作者:
Smith AJ;Toledo CM;Wietgrefe SW;Duan L;Schacker TW;Reilly CS;Haase AT

文献摘要

参考文献

被引文献

相似文献

HIV-1感染的一个病理特征是免疫系统的慢性激活,部分原因是促炎症细胞因子的表达增加。宿主试图通过免疫抑制的代偿中介来抵消这种长期的免疫激活。我们最近在对HIV-1感染淋巴组织(LT)的微阵列研究中发现了一个编码促炎细胞因子IL-32的基因,并在这里表明,在HIV-1感染者的肠道和LT中,IL-32的表达增加可能具有迄今为止尚未被认识的作为免疫抑制的中介作用。我们发现:(I)在体内,IL-32在T细胞、B细胞、巨噬细胞、树突状细胞和上皮细胞中的表达增加;(Ii)IL-32在体外诱导免疫细胞中免疫抑制分子吲哚胺2,3-双加氧酶(IDO)和免疫球蛋白样转录本4(ILT4)的表达;(Iii)在体内,IL-32相关的IDO/ILT4在LT巨噬细胞和肠上皮细胞中的表达降低了免疫激活,但也可能破坏宿主防御,支持病毒的高效复制,从而解释了IL-32水平与LT中HIV-1复制之间的相关性。因此,在HIV-1感染期间,我们认为IL-32调节慢性免疫激活以避免相关的免疫病理,但同时抑制抗病毒免疫反应,从而矛盾地支持HIV-1的复制和病毒的持续。
One pathological hallmark of HIV-1 infection is chronic activation of the immune system, driven, in part, by increased expression of pro-inflammatory cytokines. The host attempts to counterbalance this prolonged immune activation through compensatory mediators of immune suppression. We recently identified a gene encoding the pro-inflammatory cytokine IL-32 in microarray studies of HIV-1 infection in lymphatic tissue (LT) and show here that increased expression of IL-32 in both gut and LT of HIV-1-infected individuals may have a heretofore unappreciated role as a mediator of immune suppression. We show that: (i) IL-32 expression is increased in T cells, B cells, macrophages, dendritic cells, and epithelial cells in vivo; (ii) IL-32 induces the expression of immunosuppressive molecules indoleamine 2, 3-dioxygenase (IDO) and immunoglobulin-like transcript 4 (ILT4) in immune cells in vitro; (iii) in vivo, IL-32-associated IDO/ILT4 expression in LT macrophages and gut epithelial cells decreases immune activation but also may impair host defenses, supporting productive viral replication, thereby accounting for the correlation between IL-32 levels and HIV-1 replication in LT. Thus, during HIV-1 infection, we propose that IL-32 moderates chronic immune activation to avert associated immunopathology but at the same time dampens the antiviral immune response and thus paradoxically supports HIV-1 replication and viral persistence.
DOI: 10.1136/ard.2006.058511
发表时间: 2006-11-01
影响因子: 27.4
作者:
Dinarello, C. A.;Kim, S-H
通讯作者: Kim, S-H
DOI: 10.1097/00002030-199907300-00005
发表时间: 1999-07-30
期刊: AIDS
影响因子: 3.8
作者:
Andersson, J;Behbahani, H;Fehniger, TE
通讯作者: Fehniger, TE
DOI: 10.1107/88
发表时间: 2005-01-01
影响因子: 1.6
作者:
Jiang, Y.;Karita, E.;Jolly, P. E.
通讯作者: Jolly, P. E.
尽管表型激活,HIV诱导的I型干扰素和色氨酸分解代谢驱动T细胞功能障碍。
DOI: 10.1371/journal.pone.0002961
发表时间: 2008-08-13
期刊: PloS one
影响因子: 3.7
作者:
Boasso A;Hardy AW;Anderson SA;Dolan MJ;Shearer GM
通讯作者: Shearer GM
DOI: 10.1007/s11904-008-0005-5
发表时间: 2008-02-01
影响因子: 4.6
作者:
Alfano, Massimo;Crotti, Andrea;Poli, Guido
通讯作者: Poli, Guido