Serological detection of attenuated HIV-1 variants with nef gene deletions
Identifieur interne : 003C49 ( Main/Merge ); précédent : 003C48; suivant : 003C50Serological detection of attenuated HIV-1 variants with nef gene deletions
Auteurs : A. L. Greenway [Australie] ; J. Mills [Australie] ; D. Rhodes [Australie] ; N. J. Deacon [Australie] ; D. A. Mcphee [Australie]Source :
- AIDS : (London) [ 0269-9370 ] ; 1998.
Descripteurs français
- Pascal (Inist)
- SIDA, Virus HIV1, Diagnostic, Sérologie, Délétion, Gène, Homme, Australie.
- Wicri :
English descriptors
Abstract
Objective: To investigate whether members of a transfusion-linked cohort (the Sydney Bloodbank Cohort) infected with a net-deleted strain of HIV-1 could be differentiated from individuals infected with wild-type strains of HIV-1 by characterizing the Nef antibody response of cohort members. Design: Retrospective and prospective analysis of the nef gene sequence and the antibody response to Nef peptides in HIV-infected subjects. Methods: Plasma was obtained from all individuals of the Sydney cohort, and from a variety of HlV-1-infected and uninfected controls. Antibodies recognizing full-length recombinant HIV-1NL43 Nef protein and synthetic peptide analogues were assessed by enzyme-linked immunosorbent assay. Results: All 34 individuals infected with wild-type HIV-1 had antibodies reacting with full-length Nef protein as well as with a series of synthetic peptides (6-23-mers) spanning most of the Nef protein of HIV-1NL43. Although the HIV-1 quasispecies infecting the Sydney cohort had a consensus deletion of the nef gene corresponding to amino-acids 165-206, HIV-1 strains from individual members of the cohort had additional deletions comprising up to 80% of the nef gene. Members of the cohort had antibodies to peptides homologous to all regions of the Nef protein tested, except for a single peptide (amino-acids 162-177) that lies within the consensus nef deletion for the cohort quasispecies. Conclusion: These data show that nef-deleted strains of HIV-1 can be detected serologically. In the Sydney cohort, detection of antibodies to all regions of Nef tested, except that corresponding to amino-acids 162-177, suggests that observed deletions outside this domain occurred after this virus had infected these subjects and stimulated an immune response. A Nef peptide serological assay may be useful for identifying further examples of individuals infected with nef-deleted, attenuated HIV-1 quasispecies and for assessing the evolution of those variants in vivo.
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<front><div type="abstract" xml:lang="en">Objective: To investigate whether members of a transfusion-linked cohort (the Sydney Bloodbank Cohort) infected with a net-deleted strain of HIV-1 could be differentiated from individuals infected with wild-type strains of HIV-1 by characterizing the Nef antibody response of cohort members. Design: Retrospective and prospective analysis of the nef gene sequence and the antibody response to Nef peptides in HIV-infected subjects. Methods: Plasma was obtained from all individuals of the Sydney cohort, and from a variety of HlV-1-infected and uninfected controls. Antibodies recognizing full-length recombinant HIV-1<sub>NL43</sub>
Nef protein and synthetic peptide analogues were assessed by enzyme-linked immunosorbent assay. Results: All 34 individuals infected with wild-type HIV-1 had antibodies reacting with full-length Nef protein as well as with a series of synthetic peptides (6-23-mers) spanning most of the Nef protein of HIV-1<sub>NL43</sub>
. Although the HIV-1 quasispecies infecting the Sydney cohort had a consensus deletion of the nef gene corresponding to amino-acids 165-206, HIV-1 strains from individual members of the cohort had additional deletions comprising up to 80% of the nef gene. Members of the cohort had antibodies to peptides homologous to all regions of the Nef protein tested, except for a single peptide (amino-acids 162-177) that lies within the consensus nef deletion for the cohort quasispecies. Conclusion: These data show that nef-deleted strains of HIV-1 can be detected serologically. In the Sydney cohort, detection of antibodies to all regions of Nef tested, except that corresponding to amino-acids 162-177, suggests that observed deletions outside this domain occurred after this virus had infected these subjects and stimulated an immune response. A Nef peptide serological assay may be useful for identifying further examples of individuals infected with nef-deleted, attenuated HIV-1 quasispecies and for assessing the evolution of those variants in vivo.</div>
</front>
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<name sortKey="Mcphee, D A" sort="Mcphee, D A" uniqKey="Mcphee D" first="D. A." last="Mcphee">D. A. Mcphee</name>
<name sortKey="Mills, J" sort="Mills, J" uniqKey="Mills J" first="J." last="Mills">J. Mills</name>
<name sortKey="Rhodes, D" sort="Rhodes, D" uniqKey="Rhodes D" first="D." last="Rhodes">D. Rhodes</name>
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