Volume 43, Issue 4 pp. 258-271
Original Article

Characterization of γδT cells in naïve and HIV-infected chimpanzees and their responses to T-cell activators in vitro

Vida L. Hodara

Corresponding Author

Vida L. Hodara

Department of Virology & Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA

Southwest National Primate Research Center, San Antonio, TX, USA

Correspondence

Vida L. Hodara, PhD, Department of Virology & Immunology, Texas Biomedical Research Institute, 7620 NW Loop 410, San Antonio, TX 78227, USA.

Tel.: (210) 258 9683;

fax: (210) 670 3329;

e-mail: [email protected]

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Laura M. Parodi

Laura M. Parodi

Department of Virology & Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA

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Deborah Chavez

Deborah Chavez

Department of Virology & Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA

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Lisa M. Smith

Lisa M. Smith

Department of Virology & Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA

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Robert Lanford

Robert Lanford

Department of Virology & Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA

Southwest National Primate Research Center, San Antonio, TX, USA

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Luis D. Giavedoni

Luis D. Giavedoni

Department of Virology & Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA

Southwest National Primate Research Center, San Antonio, TX, USA

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First published: 24 March 2014
Citations: 6

Abstract

Background

γδT cells are effector cells that eliminate cancer and virus-infected cells. Chimpanzees are an endangered species that can naturally and experimentally be infected with SIV and HIV, respectively, but no information about the functionality of γδT cells during chronic lentiviral infection is currently available.

Methods

Healthy and HIV-infected chimpanzee γδT cells were characterized by flow cytometry. γδT subsets were studied after stimulation with T-cell activators, and the release of cytokines was analyzed by Luminex assay.

Results

γδT-cell subsets, Vδ1 and Vδ2Vγ9, showed different patterns in the expression of CD4, CD195, CD159a, and CD159c. Stimulation of γδT cells resulted in increased levels of CD4 and HLA-DR, which is more pronounced in Vδ1 T cells. Distinct cytokine patterns were found between healthy and HIV-infected chimpanzees.

Conclusions

Analyses of major chimpanzee γδT subsets show similarities to human γδT cells and suggest different functionality and roles in their immune response against HIV infection.

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