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IL-7 enhances Ag-specific human T cell response by increasing expression of IL-2R α and γ chains

  • Yuan K. Chou
  • , Dennis N. Bourdette
  • , David Barnes
  • , Thomas P. Finn
  • , Susan Murray
  • , Laura Unsicker
  • , Ian Robey
  • , Ruth H. Whitham
  • , Abigail C. Buenafe
  • , Mark Allegretta
  • , Halina Offner
  • , Arthur A. Vandenbark

Research output: Contribution to journalArticlepeer-review

Abstract

Interleukin-7 has demonstrated potent enhancing effects on the growth and differentiation of several immature celt types, including thymocytes, and on survival of resting and antigen activated T cells. In this study, we evaluated the effects of IL-7 on post-thymic antigen-specific T cells from human blood. IL-7 was found to enhance proliferation responses and IFN-γ secretion of myelin or recall Ag-specific Th1 cells through the selective up- regulation of the IL-2Rα and γ but not β chains in both an Ag-dependent and Ag-independent manner, but did not affect monocytes, B cells, or NK cells. These functions of IL-7 enhanced the detection of Th1 but not Th2 cell frequency by > 2.5 fold, and promoted selection of Ag-specific Th1 cells by the limiting dilution method. Moreover, IL-7 pretreatment conferred increased resistance of CD4 + T cells to CD8 + cell lysis. These studies demonstrate that IL-7 promotes the growth and survival of circulating Ag-specific human Th1 cells through a mechanism that probably involves the γc common receptor for IL-2 family members that includes IL-7.

Original languageEnglish (US)
Pages (from-to)101-111
Number of pages11
JournalJournal of Neuroimmunology
Volume96
Issue number1
DOIs
StatePublished - Apr 1 1999

Funding

The authors thank Shelley Cooper for arranging patient visits and drawing blood, Eva Niehaus for assistance in preparation of the manuscript, and Dr. Raymond Goodwin of Immunex for reviewing the manuscript. This work was supported by the Department of Veterans Affairs, Grants NS23221 and NS23444 from the National Institutes of Health, the Nancy Davis Center Without Walls, and private donors.

FundersFunder number
Nancy Davis Center Without Walls Foundation
Author National Institutes of Health National Institutes of Health National Institutes of Health National Institutes of Health The Bev Hartig Huntington's Disease Foundation National Institutes of Health
National Institute of Neurological Disorders and StrokeR01NS023444
U.S. Department of Veterans AffairsNS23221

    Keywords

    • Human T cells
    • IL-2R
    • IL-7
    • Survival factor

    ASJC Scopus subject areas

    • Immunology and Allergy
    • Immunology
    • Neurology
    • Clinical Neurology

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