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Updated: Jan 16, 2026
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Interview: HIV-1 Proviral DNA Excision Using an Evolved Recombinase
Published on: June 16, 2008
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Defective proviruses cause T cell reprogramming through promoter exaptation in HIV-1 infection
Biorxiv : the Preprint Server for Biology
|October 3, 2025
Summary
HIV proviruses can reprogram CD4+ T cells by hijacking host genes, leading to immune evasion and persistence. Blocking proviral transcription may help mitigate these effects in people living with HIV (PLWH) on antiretroviral therapy (ART).
Area of Science:
- Virology
- Immunology
- Genetics
Background:
- People living with HIV (PLWH) on antiretroviral therapy (ART) harbor defective HIV proviruses integrated into CD4+ T cells.
- HIV DNA preferentially integrates into specific genomic locations, suggesting selective forces at play.
- Integration site-specific interactions between viral and host sequences influence cellular behavior.
Purpose of the Study:
- To investigate the role of provirus integration site selection in CD4+ T cell reprogramming.
- To explore the mechanism of proviral exaptation and its impact on host gene regulation.
- To identify potential therapeutic strategies targeting proviral activity.
Main Methods:
- Utilized a cellular model with BACH2-integrated proviruses.
- Analyzed proviral transcription and its effect on BACH2 protein levels.
- Mimicked transcriptomic changes in primary CD4+ T lymphocytes.
- Investigated the impact of provirus exaptation at the STAT5B locus.
Main Results:
- Proviral transcription at the BACH2 locus drives aberrant BACH2 protein levels, leading to cell reprogramming.
- Reprogrammed CD4+ T cells exhibit proliferative, memory-like characteristics with immune evasion and survival traits.
- Exaptation at the STAT5B locus promotes an effector-like T cell fate.
- Inhibiting proviral transcription reduces exaptation and mitigates CD4+ T cell reprogramming.
Conclusions:
- Defective HIV proviruses can reprogram target CD4+ T cells through insertional activation of host genes.
- Proviral exaptation contributes to immune dysregulation and reservoir cell persistence in PLWH.
- Targeting proviral transcription presents a potential strategy to manage HIV-associated immune dysfunction.
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