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Innate factors in human breast milk inhibit cell-free HIV-1 but not cell-associated HIV-1 infection of CD4+ cells. | LitMetric

AI Article Synopsis

Article Abstract

Background: Transmission of HIV from mother to child through breast-feeding remains a global health challenge, particularly in developing countries. Breast milk from an HIV-infected women may contain both cell-free HIV-1 and cell-associated virus; however, the impact of human breast milk on HIV infection and replication in CD4 cells remain poorly understood.

Objectives: In the present study, we evaluated the effects of breast milk in vitro on infection of CD4 cells with cell-free HIV-1, including effects on HIV-1 receptor expression, reverse transcription, integration, and viral transcription. Additionally, we evaluated the ability of breast milk to inhibit cell-associated transmission of HIV-1 from infected CD4 T lymphocytes.

Results: Our results demonstrate that breast milk potently inhibits infection with cell-free HIV-1 in vitro independently of viral tropism and significantly decreases HIV-1 reverse transcription and integration in CD4 cells. However, the inhibitory effect of breast milk on HIV-1 infection of CD4 cells was lost during extended culture, and direct coculture of HIV-infected CD4 T lymphocytes with susceptible target cells revealed that breast milk was ineffective at blocking cell-associated HIV-1 infection.

Conclusions: Our findings suggest that breast milk may provide a protective function against cell-free HIV-1 but may be less effective at blocking infection by cell-associated virus.

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Source
http://dx.doi.org/10.1097/QAI.0b013e3181a3908dDOI Listing

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