Involvement of claudin-7 in HIV infection of CD4(-) cells.

Involvement of claudin-7 in HIV infection of CD4(-) cells.
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DOI:
10.1186/1742-4690-2-79
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发表时间:
2005-12-20
期刊:
影响因子:
3.3
通讯作者:
Pang S
Pang S
中科院分区:
医学2区
文献类型:
--
作者:
Zheng J;Xie Y;Campbell R;Song J;Massachi S;Razi M;Chiu R;Berenson J;Yang OO;Chen IS;Pang S

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人类免疫缺陷病毒(HIV)感染CD 4(-)细胞已被证实,这可能是HIV传播的一个重要机制。我们证明了一种膜蛋白,claudin-7(CLDN-7),参与了HIV对CD 4(-)细胞的感染。当将CLDN-7转染到CD 4(-)细胞系293 T中时,证实了HIV易感性的显著增加(2至100倍)。此外,针对CLDN-7的抗体显著降低了CD 4(-)细胞的HIV感染。此外,在其包膜上表达CLDN-7的HIV病毒粒子对293 T CD 4(-)细胞的感染性比不具有CLDN-7的亲本HIV高得多。RT-PCR结果表明,CLDN-7在巨噬细胞和刺激的外周血白细胞中表达,表明感染个体中产生的大多数HIV病毒体在其包膜上具有CLDN-7。我们还发现CLDN-7在泌尿生殖系统和胃肠道组织中高度表达。总之,这些结果表明,CLDN-7可能在HIV感染CD 4(-)细胞中发挥重要作用。
Human immunodeficiency virus (HIV) infection of CD4(-) cells has been demonstrated, and this may be an important mechanism for HIV transmission. We demonstrated that a membrane protein, claudin-7 (CLDN-7), is involved in HIV infection of CD4(-) cells. A significant increase in HIV susceptibility (2- to 100-fold) was demonstrated when CLDN-7 was transfected into a CD4(-) cell line, 293T. In addition, antibodies against CLDN-7 significantly decreased HIV infection of CD4(-) cells. Furthermore, HIV virions expressing CLDN-7 on their envelopes had a much higher infectivity for 293T CD4(-) cells than the parental HIV with no CLDN-7. RT-PCR results demonstrated that CLDN-7 is expressed in both macrophages and stimulated peripheral blood leukocytes, suggesting that most HIV virions generated in infected individuals have CLDN-7 on their envelopes. We also found that CLDN-7 is highly expressed in urogenital and gastrointestinal tissues. Together these results suggest that CLDN-7 may play an important role in HIV infection of CD4(-) cells.
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