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Titolo:
Zidovudine resensitization and dual HIV-1 resistance to zidovudine and lamivudine in the Delta lamivudine roll-over study
Autore:
Masquelier, B; Descamps, D; Carriere, I; Ferchal, F; Collin, G; Denayrolles, M; Ruffault, A; Chanzy, B; Izopet, J; Buffet-Janvresse, C; Schmitt, MP; Race, E; Fleury, HJA; Aboulker, JP; Yeni, P; Brun-Vezinet, F;
Indirizzi:
Univ Hosp, Virol Lab, Rennes, France Univ Hosp Rennes FranceUniv Hosp, Virol Lab, Rennes, France Univ Hosp, Virol Lab, Grenoble, France Univ Hosp Grenoble FranceUniv Hosp, Virol Lab, Grenoble, France Univ Hosp, Virol Lab, Toulouse, France Univ Hosp Toulouse FranceUniv Hosp, Virol Lab, Toulouse, France Univ Hosp, Virol Lab, Rouen, France Univ Hosp Rouen FranceUniv Hosp, Virol Lab, Rouen, France Univ Hosp, Virol Lab, Strasbourg, France Univ Hosp Strasbourg FranceUniv Hosp, Virol Lab, Strasbourg, France CHU Bichat, Dept Infectiol, Virol Lab, Paris, France CHU Bichat Paris France ichat, Dept Infectiol, Virol Lab, Paris, France CHU Bichat, INSERM, IMEA, Paris, France CHU Bichat Paris FranceCHU Bichat, INSERM, IMEA, Paris, France Univ Hosp, Virol Lab, Bordeaux, France Univ Hosp Bordeaux FranceUniv Hosp, Virol Lab, Bordeaux, France INSERM, SC10, Villejuif, France INSERM Villejuif FranceINSERM, SC10, Villejuif, France
Titolo Testata:
ANTIVIRAL THERAPY
fascicolo: 2, volume: 4, anno: 1999,
pagine: 69 - 77
SICI:
1359-6535(1999)4:2<69:ZRADHR>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
REVERSE-TRANSCRIPTASE; COMBINATION THERAPY; IN-VIVO; EFFICACY; MONOTHERAPY; INHIBITORS; MUTATION; SAFETY; LOAD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Masquelier, B Univ Hosp, Virol Lab, Bordeaux, France Univ Hosp Bordeaux France sp, Virol Lab, Bordeaux, France
Citazione:
B. Masquelier et al., "Zidovudine resensitization and dual HIV-1 resistance to zidovudine and lamivudine in the Delta lamivudine roll-over study", ANTIVIR TH, 4(2), 1999, pp. 69-77

Abstract

Objective: To study zidovudine resensitization and dual resistance to zidovudine/lamivudine in HIV-1 isolates from nucleoside reverse transcriptase (RT) inhibitor-experienced patients during selective pressure exerted by zidovudine/lamivudine combination therapy. Design and methods: HIV-1 isolates from 29 patients receiving zidovudine/lamivudine combination therapy in the Delta roll-over study were analysed atentry and during a 1 year follow-up period for phenotypic susceptibility to zidovudine and lamivudine in the ANRS PBMC assay. The RT gene from codon 20 to 230 and at codon 333 was analysed by nucleotide sequencing of the corresponding isolates. Results: HIV-1 isolates from 23 of the 29 patients were phenotypically resistant to zidovudine at baseline; 61% of these patients showed significant zidovudine resensitization during follow-up. The zidovudine IC,, value correlated positively with log,, plasma HIV-1 RNA (P = 0.02) and negatively with the CD4 cell count (P = 0.004). Zidovudine resensitization (related to acquisition of the M184V mutation) was transient, with evolution towards dualresistance to zidovudine and lamivudine in 20 of the 29 patients. The phenotype of certain dually resistant isolates coincided with the emergence of multiple mutations in the 5' part of the RT gene. Conclusions: M184V-mediated zidovudine resensitization of HIV-1 is transient in most patients who are given zidovudine/lamivudine combination therapywhen zidovudine resistance has already emerged. The subsequent evolution towards dual phenotypic resistance to zidovudine/lamivudine corresponds to complex genotypic profiles.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 05:14:49