A novel role for APOBEC3: susceptibility to sexual transmission of murine acquired immunodeficiency virus (mAIDS) is aggravated in APOBEC3 deficient mice.

A novel role for APOBEC3: susceptibility to sexual transmission of murine acquired immunodeficiency virus (mAIDS) is aggravated in APOBEC3 deficient mice.
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DOI:
10.1186/1742-4690-9-50
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发表时间:
2012-06-12
期刊:
影响因子:
3.3
通讯作者:
Okeoma CM
Okeoma CM
中科院分区:
医学2区
文献类型:
--
作者:
Jones PH;Mehta HV;Okeoma CM

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APOBEC3 蛋白是限制 HIV、MMTV 和 MLV 等逆转录病毒感染的宿主因子,在造血和非造血细胞(如巨噬细胞、淋巴细胞、树突状细胞和上皮细胞)中表达不同。此前,我们发现乳腺上皮细胞中表达的 APOBEC3 能够限制 β-逆转录病毒(小鼠乳腺肿瘤病毒)通过乳汁传播。在本研究中,我们使用 APOBEC3 敲除小鼠及其野生型对应物来探究 APOBEC3 在 LP-BM5 MLV(鼠类艾滋病 (mAID) 的病原体)性传播中的作用。我们发现小鼠 APOBEC3 在小鼠生殖道组织和配子中表达,并且 APOBEC3 缺陷小鼠的生殖道组织更容易受到 LP-BM5 病毒的感染。在生殖道组织中表达的 APOBEC3 很可能在减少通过性途径传播病毒方面发挥了作用,因为与 APOBEC3+ 小鼠相比,缺乏 APOBEC3 基因的小鼠具有更高的生殖器和精浆病毒载量,并且可以更有效地通过性行为将病毒传播给其伴侣。此外,我们发现,性感染 LP-BM5 病毒的雌性小鼠以 APOBEC3 依赖性方式将病毒传播给其后代。我们的数据表明,生殖器组织固有的 APOBEC3 限制生殖道感染并限制 LP-BM5 病毒的性传播。
APOBEC3 proteins are host factors that restrict infection by retroviruses like HIV, MMTV, and MLV and are variably expressed in hematopoietic and non-hematopoietic cells, such as macrophages, lymphocytes, dendritic, and epithelia cells. Previously, we showed that APOBEC3 expressed in mammary epithelia cells function to limit milk-borne transmission of the beta-retrovirus, mouse mammary tumor virus. In this present study, we used APOBEC3 knockout mice and their wild type counterpart to query the role of APOBEC3 in sexual transmission of LP-BM5 MLV – the etiological agent of murine AIDs (mAIDs). We show that mouse APOBEC3 is expressed in murine genital tract tissues and gametes and that genital tract tissue of APOBEC3-deficient mice are more susceptible to infection by LP-BM5 virus. APOBEC3 expressed in genital tract tissues most likely plays a role in decreasing virus transmission via the sexual route, since mice deficient in APOBEC3 gene have higher genitalia and seminal plasma virus load and sexually transmit the virus more efficiently to their partners compared to APOBEC3+ mice. Moreover, we show that female mice sexually infected with LP-BM5 virus transmit the virus to their off-spring in APOBEC3-dependent manner. Our data indicate that genital tissue intrinsic APOBEC3 restricts genital tract infection and limits sexual transmission of LP-BM5 virus.
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