The myxobacterial metabolite ratjadone A inhibits HIV infection by blocking the Rev/CRM1-mediated nuclear export

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Eric Fleta-Soriano, Javier P Martinez, Bettina Hinkelmann

  • 1Infection Biology Group, Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Dr, Aiguader 88 08003, Barcelona, Spain. andreas.meyerhans@upf.edu.

Microbial Cell Factories
|January 31, 2014
PubMed
Abstract

Insights

Ratjadone A shows strong anti-HIV activity by inhibiting the CRM1-Rev complex, crucial for HIV-1 mRNA export. However, its therapeutic potential is limited by toxicity, suggesting future research into derivatives.

Area of Science:

  • Virology
  • Molecular Biology
  • Drug Discovery

Background:

  • HIV-1 mRNA nuclear export relies on the Rev protein and host CRM1.
  • The CRM1-Rev complex is a potential target for antiviral therapies.
  • Ratjadone A, a myxobacteria-derived compound, inhibits CRM1.

Purpose of the Study:

  • To evaluate the anti-HIV efficacy of ratjadone A.
  • To investigate the mechanism of action of ratjadone A on the CRM1-Rev pathway.

Main Methods:

  • In vitro anti-HIV assays.
  • Drug affinity responsive target stability (DARTS) assay.

Main Results:

  • Ratjadone A demonstrated dose-dependent inhibition of HIV infection with nanomolar EC50 values.
  • Inhibition occurred approximately 12 hours post-infection and was specific to the Rev/CRM1 pathway.
  • DARTS assay confirmed ratjadone A binds to CRM1, disrupting the CRM1-Rev-NES complex formation.

Conclusions:

  • Ratjadone A possesses potent anti-HIV activity.
  • Low selectivity due to toxicity limits its therapeutic application.
  • Further development of ratjadone derivatives may offer improved therapeutic potential.

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