Experimental depletion of CD8+ cells in acutely SIVagm-infected African Green Monkeys results in increased viral replication.

Experimental depletion of CD8+ cells in acutely SIVagm-infected African Green Monkeys results in increased viral replication.
复制标题

DOI:
10.1186/1742-4690-7-42
复制
发表时间:
2010-05-11
期刊:
影响因子:
3.3
通讯作者:
Pandrea I
Pandrea I
中科院分区:
医学2区
文献类型:
--
作者:
Gaufin T;Ribeiro RM;Gautam R;Dufour J;Mandell D;Apetrei C;Pandrea I

文献摘要

参考文献

被引文献

相似文献

致病性 SIV 感染中的体内 CD8+ 细胞耗竭确定了细胞免疫在控制病毒载量 (VL) 和疾病进展中的关键作用。然而,类似的研究在慢性感染的 SM 中得出了不一致的结果,导致一些作者提出,在自然宿主中,SIV 复制独立于细胞免疫。为了评估细胞免疫反应在控制自然宿主中 SIV 复制中的作用,我们研究了 AGM 中急性 SIV 感染期间 CD8+ 细胞耗竭的影响。 9 名 AGM 感染了 SIVagm.sab,并随访至接种后第 225 天。感染后(p.i.)第 0 天(50 mg/kg)、第 6 天和第 13 天(分别为 10 mg/kg),对 4 名患者进行静脉注射 cM-T807 抗体。 CD8+ 细胞在注射后长达 28 天被耗尽。在所有经过处理的 AGM 中的外周血和 LN 中。肠道中发生部分 CD8+ T 细胞耗竭。两组中 SIVagm VL 的峰值水平相似(107-108 RNA 拷贝/ml)。然而,虽然 VL 在未耗尽的 AGM 中受到控制,在注射后第 28 天达到设定点水平(104-105 RNA 拷贝/ml),但到注射后第 21 天仍维持高 VL(> 106 RNA 拷贝/ml)。在 CD8 耗尽的年度股东大会上。到注射后第 42 天,两组之间的 VL 相当。免疫激活和增殖水平直至注射后第 72 天仍保持较高水平。在 CD8 耗尽的 AGM 中,到感染后第 28 天,对照组恢复到感染前水平。没有 CD8 耗尽的动物发展为艾滋病。 CD8+ 细胞负责 SIVagm.sab 感染的 AGM 中急性后病毒复制的部分控制。与猕猴相比,SIVagm 感染的 AGM 能够在 CD8+ T 细胞恢复后控制病毒复制并避免疾病进展。
In vivo CD8+ cell depletions in pathogenic SIV infections identified a key role for cellular immunity in controlling viral load (VL) and disease progression. However, similar studies gave discordant results in chronically-infected SMs, leading some authors to propose that in natural hosts, SIV replication is independent of cellular immunity. To assess the role of cellular immune responses in the control of SIV replication in natural hosts, we investigated the impact of CD8+ cell depletion during acute SIV infection in AGMs. Nine AGMs were infected with SIVagm.sab and were followed up to day 225 p.i. Four were intravenously infused with the cM-T807 antibody on days 0 (50 mg/kg), 6, and 13 (10 mg/kg, respectively) post infection (p.i.). CD8+ cells were depleted for up to 28 days p.i. in peripheral blood and LNs in all treated AGMs. Partial CD8+ T cell depletion occurred in the intestine. SIVagm VLs peaked at similar levels in both groups (107-108 RNA copies/ml). However, while VLs were controlled in undepleted AGMs, reaching set-point levels (104-105 RNA copies/ml) by day 28 p.i., high VLs (>106 RNA copies/ml) were maintained by day 21 p.i. in CD8-depleted AGMs. By day 42 p.i., VLs were comparable between the two groups. The levels of immune activation and proliferation remained elevated up to day 72 p.i. in CD8-depleted AGMs and returned to preinfection levels in controls by day 28 p.i. None of the CD8-depleted animals progressed to AIDS. CD8+ cells are responsible for a partial control of postacute viral replication in SIVagm.sab-infected AGMs. In contrast to macaques, the SIVagm-infected AGMs are able to control viral replication after recovery of the CD8+ T cells and avoid disease progression.
DOI: 10.4049/jimmunol.164.2.934
发表时间: 2000-01-15
影响因子: 4.4
作者:
Kaur, A;Yang, J;Johnson, RP
通讯作者: Johnson, RP
DOI: 10.1128/jvi.00895-07
发表时间: 2007-08-01
影响因子: 5.4
作者:
Loffredo, John T.;Maxwell, Jess;Watkins, David I.
通讯作者: Watkins, David I.
DOI: 10.1084/jem.20090356
发表时间: 2009-07-06
期刊: The Journal of experimental medicine
影响因子: --
作者:
Okoye A;Park H;Rohankhedkar M;Coyne-Johnson L;Lum R;Walker JM;Planer SL;Legasse AW;Sylwester AW;Piatak M Jr;Lifson JD;Sodora DL;Villinger F;Axthelm MK;Schmitz JE;Picker LJ
通讯作者: Picker LJ
DOI: 10.1016/j.virol.2006.05.012
发表时间: 2006-09-15
期刊: VIROLOGY
影响因子: 3.7
作者:
Malkevitch, Nina V.;Patterson, L. Jean;Robert-Guroff, Marjorie
通讯作者: Robert-Guroff, Marjorie
DOI: 10.1182/blood-2005-12-4818
发表时间: 2006-06-15
期刊: BLOOD
影响因子: 20.3
作者:
Betts, Michael R.;Nason, Martha C.;Koup, Richard A.
通讯作者: Koup, Richard A.