Tropism-restricted neutralization by secretory IgA from parotid saliva of HIV type 1-infected individuals.

Tropism-restricted neutralization by secretory IgA from parotid saliva of HIV type 1-infected individuals.
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HIV 1 型感染者腮腺唾液中分泌型 IgA 的向性限制性中和。

DOI:
10.1089/088922203764969474
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发表时间:
2003
期刊:
AIDS research and human retroviruses.
影响因子:
--
通讯作者:
Jackson,Susan
Jackson,Susan
中科院分区:
--
文献类型:
--
作者:
Wu,Xueling;Hall,Stacy;Jackson,Susan

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在这项研究中,我们用两个R5和两个X4原代分离物检测了从10名HIV-1感染者的腮腺唾液中分离出的分泌性IgA对外周血单个核细胞HIV-1感染的影响。四名受试者的唾液IgA均能抑制R5病毒,但不能抑制X4病毒。在另一个实验对象中,唾液IgA抑制了X4病毒但不抑制R5病毒。这些抗体的特异性似乎针对gp160和gp120,但不限于gp160和gp120。与唾液IgA不抑制HIV-1感染的受试者相比,显示中和活性的受试者处于相对早期的疾病阶段,CD4+T细胞计数大于200个细胞/μl。我们的数据表明,在hiv -1感染的受试者中存在嗜性特异性(更常见的是r5特异性)中和抗体。由于HIV-1的粘膜传播仅发生在R5病毒中,而X4病毒经常出现在已建立的感染中,并且在疾病后期病毒持续存在,我们的数据表明分泌IgA在预防病毒传播中具有潜在作用,但在慢性感染中不太可能起作用。
In this study we examined secretory IgA, isolated from the parotid saliva of 10 HIV-1-infected subjects, for its ability to influence HIV-1 infection of peripheral blood mononuclear cells with two R5 and two X4 primary isolates. Salivary IgA from four subjects was found to inhibit both R5 viruses but not the X4 viruses. In another subject, salivary IgA inhibited both X4 viruses but not the R5 viruses. The specificity of these antibodies seemed to be directed against, but not restricted to, gp160 and gp120. Compared with subjects whose salivary IgA did not inhibit HIV-1 infection, subjects who displayed neutralizing activity were in relatively early stages of disease and had CD4+T cell counts greater than 200 cells/μl. Our data indicate the presence of tropism-specific (more frequently R5-specific) neutralizing antibodies in HIV-1-infected subjects. Because mucosal transmission of HIV-1 occurs exclusively in R5 viruses, and X4 viruses often emerge in established infection and account for viral persistence later in disease, our data suggest a potential role for secretory IgA in preventing viral transmission, but a less likely effect on chronic infection.
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