Natural infection of chimpanzees with new lentiviruses related to HIV-1/SIVcpz

Jun Takehisa, Biaise Bikandou, Eiji Ido, Innocent Mboudjeka, Reine M'Vouenze, Marie Yvonne Nzoukoudi, Yosuke Harada, Yumi Yamaguchi-Kabata, Tomoyuki Miura, Michel M'Pandi, Henri Jopseph Parra, Pierre M'Pelé, Masanori Hayami

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3 Citations (Scopus)


To determine newly identified lentiviruses, termed simian immunodeficiency virus (SIV)cpz97CG4 and SIVcpz97CG6, from two wild-captured juvenile brother chimpanzees in the Republic of Congo, subgenomic pol (integrase, 288 bp), 5′tat/rev-env C1 (including vpu, 354 bp) and env (C2-C4, 544 bp) gene fragments were amplified and sequenced. The analysis revealed significantly discordant phylogenetic positions of SIVcpz97CG in each genomic region. In the trees derived from partial env sequences (V3), both SIVcpz strains clustered in human immunodeficiency virus type 1 (HIV-1) subtype A. However, in the trees derived from partial pol (integrase) and 5′tat/rev-env C1 (including vpu) sequences, they clustered independently from any of the known HIV-1 subtypes. Especially, in the 5′tat/rev-vpu tree, they branched before the root of HIV-1 group M. These findings suggest that these Congolese SIVcpz genomes are mosaic, probably due to a recombinational event in the recent past, and it provides evidence for a rather recently occurring cross-species transmission between humans and chimpanzees.

Original languageEnglish
Pages (from-to)169-173
Number of pages5
JournalJournal of Medical Primatology
Issue number4-5
Publication statusPublished - 1999


  • Central Africa
  • Cross-species transmission


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