Polymorphisms in the interleukin-4 receptor α chain gene influence susceptibility to HIV-1 infection and its progression to AIDS

Content Provider	Semantic Scholar
Author	Soriano, A. Lozano, Francisco Oliva, Harold García, Felipe Nomdedeu, Meritxell Lazzari, Elisa De Rodríguez, Carmen Barrasa, Angel Lorenzo, José Ignacio González Romero, Jorge Del Plana, Montserrat Miró, Jose M. Gatell, Josep María Vives, Jordi Gallart, Teresa
Copyright Year	2005
Abstract	Interleukin (IL) 4 is a key T helper-2 cytokine that downregulates and upregulates CCR5 and CXCR4, respectively, the main coreceptors for HIV. Our objective is to investigate whether single-nucleotide polymorphisms (SNPs) in the IL-4 receptor α chain gene (IL4RA) affect HIV infection and its progression to AIDS. The I50V SNP in exon 5 and the haplotypes of six SNPs in exon 12 (E375A, C406R, S411L, S478P, Q551R, and V554I) were studied by polymerase chain reaction and sequencing in 30 HIV+ long-term nonprogressors (LTNP), 36 HIV+ typical progressors (TP), 55 highly exposed but uninfected individuals (EU), 25 EU-sexuals (EU-Sex; mostly women) and 30 EU-hemophiliacs (EU-Hem; hepatitis C virus+), and 97 healthy controls (HC), all Caucasians and lacking CCR5Δ32 homozygosity. V50 homozygosity was increased in LTNP (44%) compared with the other groups [p=0.005; relative risk ratio=3.4, 95% confidence interval (CI)=1.12–10.6, p=0.03]. The most common (C) exon 12 haplotype, ECSSQV, predominated in all groups, but uncommon (U) haplotypes were increased in HIV+ individuals (n=64), especially in those (51 of 64) infected via parenteral exposure (35.3%) compared with HC (20.4%) and EU-Hem (18.4%) [p=0.01; odds ratio (OR)=2.14, 95% CI=1.25–3.67, p=0.01]. EU-Sex also had an increased frequency of U-haplotypes (34.8%) (OR=2.10, 95% CI=1.03–4.21, p=0.01) as well as an increased frequency of CU + UU genotypes (60.9%) compared with HC (38.2%) and EU-Hem (26.6%) (p=0.043). Distributions of genotypes fitted Hardy–Weinberg equilibrium. Data suggest that V50 homozygosity associates with slow progression and that exon 12 U-haplotypes might be associated with both susceptibility to infection via parenteral route and resistance to infection via sexual exposure. Further studies are required to confirm these findings.
Starting Page	644
Ending Page	654
Page Count	11
File Format	PDF HTM / HTML
DOI	10.1007/s00251-005-0041-x
PubMed reference number	16189667
Journal	Medline
Volume Number	57
Alternate Webpage(s)	https://rd.springer.com/content/pdf/10.1007/s00251-005-0041-x.pdf
Alternate Webpage(s)	https://doi.org/10.1007/s00251-005-0041-x
Journal	Immunogenetics
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article