Functional impairment of central memory CD4 T cells is a potential early prognostic marker for changing viral load in SHIV-infected rhesus macaques.

Functional impairment of central memory CD4 T cells is a potential early prognostic marker for changing viral load in SHIV-infected rhesus macaques.
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DOI:
10.1371/journal.pone.0019607
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Sastry KJ
Sastry KJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
He H;Nehete PN;Nehete B;Wieder E;Yang G;Buchl S;Sastry KJ

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在艾滋病毒感染中,有关免疫功能障碍程度的文献很少,无法与CD 4 + T细胞计数或病毒载量相关和/或预测疾病进展。我们使用SHIV感染的恒河猴模型评估了记忆T细胞亚群作为改变病毒载量和/或疾病进展的潜在预后标志物的功能特征。相对于病毒载量低/检测不到的长期非进展者,慢性血浆病毒血症但临床健康的患者在响应PMA和离子霉素(PMA+I)刺激的中枢记忆亚群的IL-2产生方面表现出显著较低的CD 4 + T细胞数量和功能受损,但不表现出CD 8 + T细胞。高病毒血症动物表现出受损的所有T细胞亚群的精氨酸生产。这些结果表明,CD 4 + T细胞的功能障碍,特别是中央记忆亚群,可能是一个潜在的指标/预测慢性感染与免疫功能障碍,这可以相对容易地测定使用非特异性PMA+I刺激。
In HIV infection there is a paucity of literature about the degree of immune dysfunction to potentially correlate and/or predict disease progression relative to CD4+ T cells count or viral load. We assessed functional characteristics of memory T cells subsets as potential prognostic markers for changing viral loads and/or disease progression using the SHIV-infected rhesus macaque model. Relative to long-term non-progressors with low/undetectable viral loads, those with chronic plasma viremia, but clinically healthy, exhibited significantly lower numbers and functional impairment of CD4+ T cells, but not CD8+ T cells, in terms of IL-2 production by central memory subset in response to PMA and ionomycine (PMA+I) stimulation. Highly viremic animals showed impaired cytokine-production by all T cells subsets. These results suggest that functional impairment of CD4+ T cells in general, and of central memory subset in particular, may be a potential indicator/predictor of chronic infection with immune dysfunction, which could be assayed relatively easily using non-specific PMA+I stimulation.
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