Stromal-derived factor (SDF)-1, the natural ligand for CXCR4, is present in a common polymorphic variant defined by a G-->A transition in the 3' untranslated region of the gene. In persons infected with human immunodeficiency virus type 1 (HIV-1), the homozygous genotype (SDF1-3'A/3'A) has been postulated to interfere with the appearance of T-tropic syncytium-inducing strains. The polymorphism of SDF1 was correlated with HIV-1 phenotype, plasma viremia, and unspliced and multiply spliced specific transcripts in 158 virologically characterized HIV-1-infected patients (39 recent seroconverters, 75 typical progressors, and 44 AIDS patients) and in 42 HIV-1-infected long-term nonprogressors (LTNPs). Analysis of SDF1 allele distribution revealed that SDF1-3'A/3'A status is associated with low CD4 cell count (P=.0449) but not with a specific HIV-1 phenotype. In LTNPs, SDF1-+/+ condition defined a subset of persons with lower HIV-1 replication than in heterozygous subjects. The low viral activity in SDF1-+/+ LTNPs suggests that other factors play a major role in vivo in determining the course of HIV-1 infection.
|Titolo:||Identification of two distinct subsets of long-term nonprogressors with divergent viral activity by stromal-derived factor 1 chemokine gene polymorphism analysis|
|Parole Chiave:||Virus Replication; Chemokines, CXC; HIV Long-Term Survivors; Polymorphism, Genetic; Humans; Aged; Reverse Transcriptase Polymerase Chain Reaction; RNA, Viral; HIV-1; Giant Cells; Phenotype; Polymerase Chain Reaction; Chemokine CXCL12; Polymorphism, Restriction Fragment Length; HIV Infections; Adult; Middle Aged; Female; Male|
|Settore Scientifico Disciplinare:||Settore MED/17 - Malattie Infettive|
Settore BIO/14 - Farmacologia
|Data di pubblicazione:||ago-1999|
|Digital Object Identifier (DOI):||10.1086/314864|
|Appare nelle tipologie:||01 - Articolo su periodico|