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Arc of a vicious circle: pathways activated by Mycobacterium tuberculosis that target the HIV-1 long terminal repeat

James V Falvo1, Shahin Ranjbar, Luke D Jasenosky

  • 1Immune Disease Institute and Program in Cellular and Molecular Medicine, Children’s Hospital Boston, MA, USA. falvo@idi.harvard.edu

American Journal of Respiratory Cell and Molecular Biology
|August 20, 2011
PubMed

Insights

Mycobacterium tuberculosis (Mtb) infection triggers signaling pathways that affect human immunodeficiency virus type 1 (HIV-1) transcription. Understanding these interactions is key to addressing HIV/TB coinfection.

Area of Science:

  • Immunology
  • Virology
  • Microbiology

Background:

  • Mycobacterium tuberculosis (Mtb) infection influences host cell signaling.
  • Human immunodeficiency virus type 1 (HIV-1) replication is regulated by host transcription factors.
  • HIV-1 long terminal repeat (LTR) is a key regulatory element for viral transcription.

Purpose of the Study:

  • To review how Mtb-initiated signal transduction cascades modulate HIV-1 LTR-mediated transcription.
  • To elucidate the molecular mechanisms underlying HIV-1 replication in Mtb-infected hosts.

Main Methods:

  • Examination of signal transduction pathways activated by Mtb infection.
  • Analysis of host pattern recognition receptor activation by Mtb components.
  • Investigation of cytokine and chemokine signaling in response to Mtb.

Main Results:

  • Mtb infection induces two distinct signaling phases affecting HIV-1 LTR transcription factors.
  • Mtb molecules interact with host pattern recognition receptors, initiating signaling cascades.
  • Secreted cytokines and chemokines further modulate these cascades, driving viral transcription.

Conclusions:

  • Mtb strain variation influences initial host receptor interactions and subsequent HIV-1 transcription.
  • Understanding these mechanisms is crucial for addressing accelerated viral replication in HIV/TB coinfection.
  • This knowledge can inform therapeutic strategies for co-infected individuals.

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