TFH cells accumulate in mucosal tissues of humanized-DRAG mice and are highly permissive to HIV-1.

TFH cells accumulate in mucosal tissues of humanized-DRAG mice and are highly permissive to HIV-1.
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DOI:
10.1038/srep10443
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发表时间:
2015-06-02
期刊:
影响因子:
4.6
通讯作者:
Rao M
Rao M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Allam A;Majji S;Peachman K;Jagodzinski L;Kim J;Ratto-Kim S;Wijayalath W;Merbah M;Kim JH;Michael NL;Alving CR;Casares S;Rao M

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B细胞的成熟需要生殖中心的CD 4 + T滤泡辅助细胞(TFH)。虽然TFH细胞的作用已经在HIV-1感染个体的血液和淋巴结中进行了研究,但其在粘膜组织中的作用尚未研究。我们表明,人源化DRAG小鼠的肠道和雌性生殖道(FRT)具有高水平的人淋巴细胞和高频率的TFH(CXCR 5 +PD-1++)和Adsor-TFH(CXCR 5 +PD-1+)细胞。大多数TFH细胞表达CCR 5和CXCR 3,并且是最允许HIV-1感染的。人源化DRAG小鼠的单次低剂量阴道内HIV-1攻击导致100%感染性,TFH细胞主要在派尔集合淋巴结和FRT中积累。FRT中TFH细胞的新发现可能有助于DRAG小鼠对HIV-1感染的高易感性。因此,这种小鼠模型为研究TFH细胞和评估HIV-1疫苗提供了新的机会。
CD4+ T follicular helper cells (TFH) in germinal centers are required for maturation of B-cells. While the role of TFH-cells has been studied in blood and lymph nodes of HIV-1 infected individuals, its role in the mucosal tissues has not been investigated. We show that the gut and female reproductive tract (FRT) of humanized DRAG mice have a high level of human lymphocytes and a high frequency of TFH (CXCR5+PD-1++) and precursor-TFH (CXCR5+PD-1+) cells. The majority of TFH-cells expressed CCR5 and CXCR3 and are the most permissive to HIV-1 infection. A single low-dose intravaginal HIV-1 challenge of humanized DRAG mice results in 100% infectivity with accumulation of TFH-cells mainly in the Peyer’s patches and FRT. The novel finding of TFH-cells in the FRT may contribute to the high susceptibility of DRAG mice to HIV-1 infection. This mouse model thus provides new opportunities to study TFH-cells and to evaluate HIV-1 vaccines.
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