HIV-1 infection in persons homozygous for CCR5-Δ32 allele: The next case and the review

CASCADE Collaboration in EuroCoord

Research output: Contribution to journalReview articlepeer-review

8 Citations (Scopus)

Abstract

CC-chemokine receptor 5 serves as the coreceptor for the HIV-1 R5 strains, which are responsible for the majority of HIV transmissions. A deletion of 32 nucleotides in the gene encoding this receptor (termed CCR5-Δ32) leads to the suppression of CC-chemokine receptor 5 presentation at the cell surface, thus impeding process of HIV entry into the cell. Individuals homozygous for the CCR5-Δ32 allele are resistant to infection with HIV-1 R5 strains, and are extremely rare among HIV-1-infected individuals. We have described a person homozygous for CCR5-Δ32, who was infected with subtype B HIV-1. Based on examination of proviral V3 sequences obtained from the first clinical blood sample within less than five months after seroconversion, the CXC-chemokine receptor 4-using strains (X4 or R5/X4) were detected. Data on HIV-1-infected patients homozygous for the CCR5-Δ32 allele, course of HIV-1 infection in these cases, and the infecting viral strains from current and all former reports on HIV-1 infection in CCR5-Δ32 homozygotes were gathered and compared. Identification of HIV-1-infected persons homozygous for CCR5-Δ32 supports the evidence that the lack of functional CC-chemokine receptor 5 at the cell surface does not confer absolute protection against HIV-1 infection, which should be considered when designing future HIV pre-exposure prophylaxis schemes based on CC-chemokine receptor 5 blocking drugs.

Original languageEnglish
Pages (from-to)219-230
Number of pages12
JournalAIDS Reviews
Volume19
Issue number4
Publication statusPublished - 1 Oct 2017

Keywords

  • CCR5 blocker
  • Coreceptor
  • HIV-1 transmission
  • Homozygous CCR5-Δ32 mutation

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