HIV-1 evades innate immune recognition through specific cofactor recruitment

Nature. 2013 Nov 21;503(7476):402-405. doi: 10.1038/nature12769. Epub 2013 Nov 6.

Abstract

Human immunodeficiency virus (HIV)-1 is able to replicate in primary human macrophages without stimulating innate immunity despite reverse transcription of genomic RNA into double-stranded DNA, an activity that might be expected to trigger innate pattern recognition receptors. We reasoned that if correctly orchestrated HIV-1 uncoating and nuclear entry is important for evasion of innate sensors then manipulation of specific interactions between HIV-1 capsid and host factors that putatively regulate these processes should trigger pattern recognition receptors and stimulate type 1 interferon (IFN) secretion. Here we show that HIV-1 capsid mutants N74D and P90A, which are impaired for interaction with cofactors cleavage and polyadenylation specificity factor subunit 6 (CPSF6) and cyclophilins (Nup358 and CypA), respectively, cannot replicate in primary human monocyte-derived macrophages because they trigger innate sensors leading to nuclear translocation of NF-κB and IRF3, the production of soluble type 1 IFN and induction of an antiviral state. Depletion of CPSF6 with short hairpin RNA expression allows wild-type virus to trigger innate sensors and IFN production. In each case, suppressed replication is rescued by IFN-receptor blockade, demonstrating a role for IFN in restriction. IFN production is dependent on viral reverse transcription but not integration, indicating that a viral reverse transcription product comprises the HIV-1 pathogen-associated molecular pattern. Finally, we show that we can pharmacologically induce wild-type HIV-1 infection to stimulate IFN secretion and an antiviral state using a non-immunosuppressive cyclosporine analogue. We conclude that HIV-1 has evolved to use CPSF6 and cyclophilins to cloak its replication, allowing evasion of innate immune sensors and induction of a cell-autonomous innate immune response in primary human macrophages.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Capsid Proteins / genetics
  • Capsid Proteins / metabolism
  • Cyclophilins / metabolism
  • Cyclosporine / metabolism
  • HIV Infections / immunology
  • HIV Infections / metabolism
  • HIV Infections / pathology
  • HIV Infections / virology
  • HIV-1 / immunology*
  • HIV-1 / metabolism
  • Humans
  • Immune Evasion*
  • Immunity, Innate / immunology*
  • Interferon Regulatory Factor-3 / metabolism
  • Interferon Type I / immunology
  • Interferon Type I / metabolism
  • Macrophages / cytology
  • Macrophages / immunology*
  • Macrophages / pathology
  • Macrophages / virology*
  • Molecular Chaperones / metabolism
  • Monocytes / cytology
  • NF-kappa B / metabolism
  • Nuclear Pore Complex Proteins / metabolism
  • Receptors, Pattern Recognition
  • Virus Internalization
  • Virus Replication / immunology
  • mRNA Cleavage and Polyadenylation Factors / deficiency
  • mRNA Cleavage and Polyadenylation Factors / genetics
  • mRNA Cleavage and Polyadenylation Factors / metabolism

Substances

  • Capsid Proteins
  • IRF3 protein, human
  • Interferon Regulatory Factor-3
  • Interferon Type I
  • Molecular Chaperones
  • NF-kappa B
  • Nuclear Pore Complex Proteins
  • Receptors, Pattern Recognition
  • cleavage factor Im, human
  • mRNA Cleavage and Polyadenylation Factors
  • ran-binding protein 2
  • Cyclosporine
  • Cyclophilins