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Updated: Jul 5, 2026
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High Throughput In Vitro Assessment of Latency Reversing Agents on HIV Transcription and Splicing
Published on: January 22, 2019
HIV-1 latency in actively dividing human T cell lines
Rienk E Jeeninga1, Ellen M Westerhout, Marja L van Gerven
1Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, The Netherlands. r.jeeninga@amc.uva.nl
Retrovirology
|April 29, 2008
Summary
Current treatments cannot eradicate HIV-1 due to viral reservoirs. Researchers developed a new in vitro model showing HIV-1 latency is an intrinsic viral property, not limited to resting T cells, offering new therapeutic insights.
Area of Science:
- Virology
- Immunology
- Molecular Biology
Background:
- Current antiretroviral therapy (ART) fails to eradicate HIV-1 due to persistent viral reservoirs.
- These reservoirs, primarily in resting memory CD4 T cells, maintain latent virus, enabling infection recurrence upon ART interruption.
- Understanding the molecular mechanisms of HIV-1 latency is crucial for developing eradication strategies.
Purpose of the Study:
- To develop a novel in vitro model for studying HIV-1 latency.
- To investigate the characteristics and regulation of latent HIV-1 provirus.
- To explore potential therapeutic targets for HIV-1 eradication.
Main Methods:
- Development of a doxycycline-inducible HIV-1 latency model using the HIV-rtTA variant.
- Generation of stable cell clones with transcriptionally silent HIV-1 provirus.
- Activation of latent provirus using doxycycline and assessment of viral gene expression and infectivity.
Main Results:
- A minority of cells in the developed model exhibited viral gene expression and spreading infection upon induction, even in actively dividing T cell lines.
- Latent HIV-1 proviruses were responsive to TNF-alpha and epigenetic modifiers (5-Azacytidine, genistein) but not standard T cell activators (PMA, IL2).
- Findings were corroborated in experiments with various T cell lines and wild-type HIV-1.
Conclusions:
- A new in vitro model for HIV-1 latency has been successfully developed.
- The study suggests that HIV-1 proviral latency is an intrinsic characteristic of the virus.
- This finding challenges the notion that latency is solely dependent on the host cell state (e.g., resting T cells).
