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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Faster HIV-1 Disease Progression among Brazilian Individuals Recently Infected with CXCR4-Utilizing Strains

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Author(s):
Araripe Sucupira, Maria Cecilia [1] ; Sanabani, Sabri [2] ; Cortes, Rodrigo M. [1] ; Giret, Maria Teresa M. [3] ; Tomiyama, Helena [1] ; Sauer, Mariana M. [1] ; Sabino, Ester Cerdeira [4] ; Janini, Luiz Mario [5] ; Kallas, Esper Georges [3] ; Diaz, Ricardo Sobhie [1]
Total Authors: 10
Affiliation:
[1] Univ Fed Sao Paulo, Div Infect Dis, Sao Paulo - Brazil
[2] Fundacao Pro Sangue, Sao Paulo Blood Bank, Sao Paulo - Brazil
[3] Univ Sao Paulo, Div Clin Immunol & Allergy, Sao Paulo - Brazil
[4] Univ Sao Paulo, Div Infect Dis, Sao Paulo - Brazil
[5] Univ Fed Sao Paulo, Div Microbiol, Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: PLoS One; v. 7, n. 1 JAN 26 2012.
Web of Science Citations: 24
Abstract

Introduction: Primary HIV infection is usually caused by R5 viruses, and there is an association between the emergence of CCXR4-utilizing strains and faster disease progression. We characterized HIV-1 from a cohort of recently infected individuals in Brazil, predicted the virus's co-receptor use based on the env genotype and attempted to correlate virus profiles with disease progression. Methods: A total of 72 recently infected HIV patients were recruited based on the Serologic Testing Algorithm for Recent HIV Seroconversion and were followed every three to four months for up to 78 weeks. The HIV-1 V3 region was characterized by sequencing nine to twelve weeks after enrollment. Disease progression was characterized by CD4+ T-cell count decline to levels consistently below 350 cells/mu L. Results: Twelve out of 72 individuals (17%) were predicted to harbor CXCR4-utilizing strains; a baseline CD4,350 was more frequent among these individuals (p = 0.03). Fifty-seven individuals that were predicted to have CCR5-utilizing viruses and 10 individuals having CXCR4-utilizing strains presented with baseline CD4.350; after 78 weeks, 33 individuals with CCR5 strains and one individual with CXCR4 strains had CD4.350 (p = 0.001). There was no association between CD4 decline and demographic characteristics or HIV-1 subtype. Conclusions: Our findings confirm the presence of strains with higher in vitro pathogenicity during early HIV infection, suggesting that even among recently infected individuals, rapid progression may be a consequence of the early emergence of CXCR4-utilizing strains. Characterizing the HIV-1 V3 region by sequencing may be useful in predicting disease progression and guiding treatment initiation decisions. (AU)

FAPESP's process: 04/15856-9 - Prospective analysis of the virological and immunological characteristics in individuals with recent HIV-1 infection in the cities of São Paulo and Santos
Grantee:Ricardo Sobhie Diaz
Support Opportunities: Research Projects - Thematic Grants