Homozygous delta 32 deletion of the CCR-5 chemokine receptor gene in an HIV-1-infected patient.
AIDS
; 11(10): F67-71, 1997 Aug.
Article
en En
| MEDLINE
| ID: mdl-9256936
ABSTRACT
BACKGROUND:
Recent research has found that entry of non-syncytium-inducing (NSI), monocyte-macrophage-tropic HIV-1 isolates requires binding to both CD4 and CCR5 receptors, and that delta 32/delta 32 homozygous individuals are protected against infection.OBJECTIVE:
To analyse the polymorphism of CCR-5 gene in HIV-1-infected and uninfected subjects. DESIGN ANDMETHODS:
CCR-5 sequences were amplified by polymerase chain reaction (PCR) from DNA of peripheral blood mononuclear cells. Samples from 152 HIV-1-infected subjects and 122 uninfected controls were tested for the detection of the 32 base-pair deletion. HIV-1 phenotype was determined by viral isolation and MT-2 evaluation.RESULTS:
The wild-type/delta 32 heterozygous and delta 32/delta 32 homozygous conditions were represented in 10.7 and 0.8% of healthy controls and in 9.8 and 0.7% of HIV-1-infected subjects, respectively. Of note, the delta 32/delta 32 deletion of the CCR-5 gene was detected by PCR and sequencing confirmed in a patient with progressive infection harbouring a clade B virus with SI phenotype.CONCLUSIONS:
delta 32/delta 32 homozygosity for the CCR-5 gene does not confer absolute protection against HIV-1 infection, suggesting that either macrophage-tropic viral strains could use coreceptors other than CCR-5 or infect independently of the presence of a functional CCR-5 coreceptor. Alternatively, primary infection sustained by T-cell-tropic isolates, although exceptional, may occur.
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Banco de datos:
MEDLINE
Asunto principal:
Polimorfismo Genético
/
Receptores del VIH
/
VIH-1
/
Seropositividad para VIH
/
Receptores de Citocinas
/
Mutación
Tipo de estudio:
Diagnostic_studies
/
Etiology_studies
/
Incidence_studies
/
Observational_studies
/
Risk_factors_studies
Límite:
Adult
/
Humans
/
Male
País/Región como asunto:
Europa
Idioma:
En
Revista:
AIDS
Asunto de la revista:
SINDROME DA IMUNODEFICIENCIA ADQUIRIDA (AIDS)
Año:
1997
Tipo del documento:
Article
País de afiliación:
Italia