Candidate microbicides block HIV-1 infection of human immature Langerhans cells within epithelial tissue explants.

Candidate microbicides block HIV-1 infection of human immature Langerhans cells within epithelial tissue explants.
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DOI:
10.1084/jem.192.10.1491
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发表时间:
2000-11-20
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Blauvelt A
Blauvelt A
中科院分区:
其他
文献类型:
--
作者:
Kawamura T;Cohen SS;Borris DL;Aquilino EA;Glushakova S;Margolis LB;Orenstein JM;Offord RE;Neurath AR;Blauvelt A

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HIV-1 性传播的最初生物学事件尚不清楚。为了模拟这些事件,我们将上皮组织外植体中的人类未成熟朗格汉斯细胞 (LC) 暴露于两种初级和两种实验室适应的 HIV-1 分离株。我们通过流式细胞术检测到从外植体自发迁移的单个 LC 中存在 HIV-1Ba-L 感染(感染 LC 的中位数 = 0.52%,范围 = 0.08–4.77%)。 HIV-1感染的LC下调表面CD4和CD83,而MHC II类、CD80和CD86则没有变化。对于所有测试的 HIV-1 毒株,迁移的 LC 对于在共培养的自体或同种异体 T 细胞中建立高水平感染(每毫升 0.1-1 μg HIV-1 p24)至关重要。与 HIV-1IIIB(X4 HIV-1 毒株)相比,HIV-1Ba-L(R5 HIV-1 毒株)更有效地感染 LC-T 细胞共培养物。有趣的是,用氨基氧戊烷-RANTES(根据激活、正常T细胞表达和分泌进行调节)或邻苯二甲酸醋酸纤维素(潜在的杀菌剂)预处理外植体,可以剂量依赖性方式阻断HIV-1对LC的感染以及随后的T细胞感染。总之,我们记录了在上皮组织内暴露于病毒后单个LC中的HIV-1感染,证明相对较少数量的这些细胞能够在共培养的T细胞中诱导高水平的感染,并为测试旨在阻止HIV-1性传播的药物提供有用的外植体模型。
Initial biologic events that underlie sexual transmission of HIV-1 are poorly understood. To model these events, we exposed human immature Langerhans cells (LCs) within epithelial tissue explants to two primary and two laboratory-adapted HIV-1 isolates. We detected HIV-1Ba-L infection in single LCs that spontaneously emigrated from explants by flow cytometry (median of infected LCs = 0.52%, range = 0.08–4.77%). HIV-1–infected LCs downregulated surface CD4 and CD83, whereas MHC class II, CD80, and CD86 were unchanged. For all HIV-1 strains tested, emigrated LCs were critical in establishing high levels of infection (0.1–1 μg HIV-1 p24 per milliliter) in cocultured autologous or allogeneic T cells. HIV-1Ba-L (an R5 HIV-1 strain) more efficiently infected LC–T cell cocultures when compared with HIV-1IIIB (an X4 HIV-1 strain). Interestingly, pretreatment of explants with either aminooxypentane-RANTES (regulated upon activation, normal T cell expressed and secreted) or cellulose acetate phthalate (potential microbicides) blocked HIV-1 infection of LCs and subsequent T cell infection in a dose-dependent manner. In summary, we document HIV-1 infection in single LCs after exposure to virus within epithelial tissue, demonstrate that relatively low numbers of these cells are capable of inducing high levels of infection in cocultured T cells, and provide a useful explant model for testing of agents designed to block sexual transmission of HIV-1.
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