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Research Article Free access | 10.1172/JCI115585

Carboxyl-terminal and central regions of human immunodeficiency virus-1 NEF recognized by cytotoxic T lymphocytes from lymphoid organs. An in vitro limiting dilution analysis.

F Hadida, A Parrot, M P Kieny, B Sadat-Sowti, C Mayaud, P Debre, and B Autran

Laboratoire d'Immunologie Cellulaire et Tissulaire, Centre Hôpitalier Universitaire Pitié-Salpétrière, Paris, France.

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Laboratoire d'Immunologie Cellulaire et Tissulaire, Centre Hôpitalier Universitaire Pitié-Salpétrière, Paris, France.

Find articles by Parrot, A. in: JCI | PubMed | Google Scholar

Laboratoire d'Immunologie Cellulaire et Tissulaire, Centre Hôpitalier Universitaire Pitié-Salpétrière, Paris, France.

Find articles by Kieny, M. in: JCI | PubMed | Google Scholar

Laboratoire d'Immunologie Cellulaire et Tissulaire, Centre Hôpitalier Universitaire Pitié-Salpétrière, Paris, France.

Find articles by Sadat-Sowti, B. in: JCI | PubMed | Google Scholar

Laboratoire d'Immunologie Cellulaire et Tissulaire, Centre Hôpitalier Universitaire Pitié-Salpétrière, Paris, France.

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Laboratoire d'Immunologie Cellulaire et Tissulaire, Centre Hôpitalier Universitaire Pitié-Salpétrière, Paris, France.

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Laboratoire d'Immunologie Cellulaire et Tissulaire, Centre Hôpitalier Universitaire Pitié-Salpétrière, Paris, France.

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Published January 1, 1992 - More info

Published in Volume 89, Issue 1 on January 1, 1992
J Clin Invest. 1992;89(1):53–60. https://doi.org/10.1172/JCI115585.
© 1992 The American Society for Clinical Investigation
Published January 1, 1992 - Version history
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Abstract

Cytotoxic T lymphocytes (CTL) specific for human immunodeficiency virus (HIV) proteins have been analyzed in lymphoid organs from seropositive patients. Indeed, an active HIV replication coexists with a major CD8+ lymphocytic infiltration in these organs. We have shown in a previous report that HIV-seropositive patients lungs were infiltrated by HIV specific CD8+ lymphocytes. In the present report, we show that HIV-specific CTL responses can also be detected in lymph nodes and spleens, and were mainly directed against the ENV, GAG, and NEF HIV-1 proteins. The primary NEF-specific CTL responses were further characterized by epitope mapping. Determination of epitope-specific CTL frequencies were performed by limiting dilution analysis. Our results indicated that, in addition to the central region of NEF (AA66-148), a new immunodominant region is recognized by CTL. This region corresponds to the carboxyl-terminal domain of NEF (amino acids 182-206). AA182-206 is recognized in association with at least two common human histocompatibility leukocyte antigen (HLA) molecules (HLA-A1 and B8), with clonal frequencies of one CTL per 10(-5) to 10(-6) splenic lymphocytes. Our data indicate that lymphoid organs may represent a major reservoir for in vivo activated HIV-specific CTL. Furthermore, the carboxyl-terminal domain of NEF was found to be conserved among several HIV strains. Therefore, our finding is of interest for further HIV vaccines development.

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Referenced in 3 patents
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