Pulsed stable isotope labeling of amino acids in cell culture uncovers the dynamic interactions between HIV-1 and the monocyte-derived macrophage

J Proteome Res. 2011 Jun 3;10(6):2852-62. doi: 10.1021/pr200124j. Epub 2011 May 3.

Abstract

Dynamic interactions between human immunodeficiency virus-1 (HIV-1) and the macrophage govern the tempo of viral dissemination and replication in its human host. HIV-1 affects macrophage phenotype, and the macrophage, in turn, can modulate the viral life cycle. While these processes are linked to host-cell function and survival, the precise intracellular pathways involved are incompletely understood. To elucidate such dynamic virus-cell events, we employed pulsed stable isotope labeling of amino acids in cell culture. Alterations in de novo protein synthesis of HIV-1 infected human monocyte-derived macrophages (MDM) were examined after 3, 5, and 7 days of viral infection. Synthesis rates of cellular metabolic, regulatory, and DNA packaging activities were decreased, whereas, those affecting antigen presentation (major histocompatibility complex I and II) and interferon-induced antiviral activities were increased. Interestingly, enrichment of proteins linked to chromatin assembly or disassembly, DNA packaging, and nucleosome assembly were identified that paralleled virus-induced cytopathology and replication. We conclude that HIV-1 regulates a range of host MDM proteins that affect its survival and abilities to contain infection.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Amino Acids / metabolism*
  • Cell Culture Techniques
  • Cells, Cultured
  • Gene Expression Regulation
  • HIV Core Protein p24 / genetics
  • HIV Core Protein p24 / metabolism
  • HIV-1 / genetics
  • HIV-1 / physiology*
  • Humans
  • Interferons / metabolism
  • Isotope Labeling
  • Macrophages / metabolism
  • Macrophages / virology*
  • Monocytes / cytology*
  • Proteome / genetics
  • Proteome / metabolism
  • Signal Transduction
  • Time Factors

Substances

  • Amino Acids
  • HIV Core Protein p24
  • Proteome
  • Interferons