Herpesvirus saimiri-Immortalized Human Lymphocytes: Novel Hosts for Analyzing HIV Type 1in VitroNeutralization
| Autor: | Cherelyn Vella, Natalie N. Zheng, Philippa Easterbrook, Rod S. Daniels |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
CD4-Positive T-Lymphocytes
medicine.drug_class Molecular Sequence Data Immunology HIV Infections HIV Antibodies HIV Envelope Protein gp120 V3 loop Biology Monoclonal antibody Peripheral blood mononuclear cell Epitope Neutralization Virus HIV Long-Term Survivors Herpesvirus 2 Saimiriine Neutralization Tests Virology medicine Humans Gammaherpesvirinae Amino Acid Sequence Cell Line Transformed Binding Sites Antibodies Monoclonal T lymphocyte Cell Transformation Viral biology.organism_classification Peptide Fragments Infectious Diseases CD4 Antigens HIV-1 Leukocytes Mononuclear |
| Zdroj: | AIDS Research and Human Retroviruses. 18:933-946 |
| ISSN: | 1931-8405 0889-2229 |
| DOI: | 10.1089/088922202760265605 |
| Popis: | Herpesvirus saimiri-immortalized CD4(+) T lymphocytes (HVS T cells) are activated memory cells that support efficient replication of primary R5 strains of HIV-1, which predominate in virus transmission. Being continuous, they are phenotypically more stable and technically less demanding than peripheral blood mononuclear cells (PBMCs). Here we present the first report using HVS T cells to assay HIV-1 neutralization in vitro. Neutralization sensitivities of paired viruses isolated from individuals in both HVS T cells (CN-2 cells) and PBMCs were similar, with homologous and heterologous plasma/sera in both CN-2- and PBMC-based assays. Analysis of V3 loop and CD4-binding site (CD4-BS) sequences showed that changes present in CN-2 isolates were neither more numerous nor more significant than those selected in their PBMC counterparts. Neutralization profiles of CN-2/PBMC virus pairs were similar again when V3- and CD4-binding site (BS)-specific monoclonal antibodies, whose mapped epitopes were conserved or of similar sequence in the virus pairs, were tested. Unlike other T cell line isolates, CN-2 isolates were not more sensitive to neutralization than their PBMC counterparts. We also show that HVS T cells do not appear to exert significant biological selection pressures on primary isolates. Paired viruses have a similar phenotype with respect to syncytium formation, cell tropism, and coreceptor usage. Thus CN-2 cells are suitable hosts for assaying neutralization and could be useful in standardizing neutralization assays performed in different laboratories. |
| Databáze: | OpenAIRE |
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