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https://www.arca.fiocruz.br/handle/icict/15500
STANDARD CONDITIONS OF VIRUS ISOLATION REVEAL BIOLOGICAL VARIABILITY OF HIV TYPE 1 IN DIFFERENT REGIONS OF THE WORLD. WHO NETWORK FOR HIV ISOLATION AND CHARACTERIZATION.
Author
Affilliation
Georg-Speyer-Haus Chemotherapeutisches Forschunginstitut, Frankfurt, Germany
Georg-Speyer-Haus Chemotherapeutisches Forschunginstitut, Frankfurt, Germany
National Institute of Biological Standards and Control. London, UK
Karolinska Institute. Microbiology and Tumorbiology Center. Stockholm, Sweden
HIV Sequence Database. Los Alamos National Laboratory. Los Alamos, New Mexico
Georg-Speyer-Haus Chemotherapeutisches Forschunginstitut, Frankfurt, Germany
National Institute of Biological Standards and Control. London, UK
National Institute of Biological Standards and Control. London, UK
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil
Institute of Tropical Medicine. Department of Microbiology. Antwerp, Belgium
Uganda Virus Research Institute. Entebbe, Uganda
Mahidol University. Faculty of Medicine Siriraj Hospital. Department of Microbiology. Division of Virology. Bangkok, Thailand
World Health Organization. Global Programme on AIDS. Geneva, Switzerland
Karolinska Institute. Microbiology and Tumorbiology Center. Stockholm, Sweden
WHO Network for HIV Isolation and Characterization
Georg-Speyer-Haus Chemotherapeutisches Forschunginstitut, Frankfurt, Germany
National Institute of Biological Standards and Control. London, UK
Karolinska Institute. Microbiology and Tumorbiology Center. Stockholm, Sweden
HIV Sequence Database. Los Alamos National Laboratory. Los Alamos, New Mexico
Georg-Speyer-Haus Chemotherapeutisches Forschunginstitut, Frankfurt, Germany
National Institute of Biological Standards and Control. London, UK
National Institute of Biological Standards and Control. London, UK
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil
Institute of Tropical Medicine. Department of Microbiology. Antwerp, Belgium
Uganda Virus Research Institute. Entebbe, Uganda
Mahidol University. Faculty of Medicine Siriraj Hospital. Department of Microbiology. Division of Virology. Bangkok, Thailand
World Health Organization. Global Programme on AIDS. Geneva, Switzerland
Karolinska Institute. Microbiology and Tumorbiology Center. Stockholm, Sweden
WHO Network for HIV Isolation and Characterization
Abstract
HIV-1 isolates were obtained from four countries within the framework of the WHO Network for HIV Isolation and Characterization. The use of standard HIV isolation procedures allowed us to compare the biological properties of 126 HIV-1 isolates spanning five genetic subtypes. In primary isolation cultures, viruses from Uganda and Brazil appeared early and replicated without delay, whereas the replication of Thai viruses was delayed by several weeks. Regardless of genetic subtype or country of origin, blood samples collected more than 2 years after seroconversion yielded virus that replicated efficiently in the primary isolation cultures. None of the isolates obtained from Thailand or Rwanda replicated in cell lines, whereas 5 of the 13 Brazilian isolates and 7 of the 11 Ugandan isolates replicated and induced syncytia in MT-2 cells. As expected for virus isolates obtained early in HIV-1 infection (within 2 years of seroconversion), all viruses from Brazil, Rwanda, and Thailand showed a slow/low replicative pattern. For the Ugandan samples, the time from seroconversion was known precisely for a few of the samples and only in one case was less than 2 years. This may explain why the five viruses that were able to replicate in all cell lines, and thus classified as rapid/high, were of Ugandan origin. Viruses able to induce syncytia in MT-2 cells, also induced syncytia in PBMC. However, 8 slow/low viruses (out of 27) gave discordant results, inducing syncytia in PBMC but not in MT-2 cells. Furthermore, using syncytium induction as a marker, changes in virus populations during early in vitro passage in PBMC could be observed
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