Genetic variations and heterosexual HIV-1 infection: analysis of clustered genes encoding CC-motif chemokine ligands

Genes Immun. 2012 Feb;13(2):202-5. doi: 10.1038/gene.2011.70. Epub 2011 Oct 6.


Several CC-motif chemokine ligands (CCLs) can block HIV-1-binding sites on CC-motif chemokine receptor 5 (CCR5) and inhibit viral entry. We studied single-nucleotide polymorphisms (SNPs) in genes encoding three CCR5 ligands (CCL3 (MIP-1a), CCL4 (MIP-1b)and CCL5 (RANTES)) along with an adjacent gene encoding a CCR2ligand (CCL2 (MCP-1)) to identify candidate markers for HIV-1 infection and pathogenesis. Analyses of 567 HIV-1 serodiscordant Zambian couples revealed that rs5029410C (in CCL3 intron 2) was associated with lower viral load (VL) in seroconverters, adjusted for gender and age (regression β=-0.57 log(10), P=4x10(-6)). Inaddition, rs34171309A in CCL3 exon 3 was associated with increased risk of HIV-1 acquisition in exposed seronegatives(hazard ratio=1.52, P=0.006 when adjusted for VL of the initially seropositive partner and genital ulcer/inflammation). SNPrs34171309 encodes a conservative Glu-to-Asp substitution. Fiven eighboring SNPs in tight linkage disequilibrium with rs34171309all showed similar associations with HIV-1 acquisition. How these multiple CCL3 SNPs may alter the occurrence or course of HIV-1 infection remains to be determined [corrected].

Publication types

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

MeSH terms

  • Alleles
  • Chemokines, CC / genetics*
  • Chemokines, CC / immunology
  • Female
  • Genetic Variation*
  • HIV Infections / genetics*
  • HIV Infections / immunology
  • HIV-1 / immunology*
  • Heterosexuality
  • Humans
  • Ligands
  • Male
  • Multigene Family*


  • Chemokines, CC
  • Ligands