The Journal of Experimental Medicine
Avanti Polar Lipids
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

Published online 3 July 2000.
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Citation Map
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new content in the JEM
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Ohteki, T.
Right arrow Articles by Ohashi, P. S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Ohteki, T.
Right arrow Articles by Ohashi, P. S.
Social Bookmarking
 Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati  
What's this?
© The Rockefeller University Press, 0022-1007/2000/7/99/ $5.00
The Journal of Experimental Medicine, Volume 192, Number 1, July 3, 2000 99-104


Original Article

Negative Regulation of T Cell Proliferation and Interleukin 2 Production by the Serine Threonine Kinase GSK-3

Toshiaki Ohtekia, Michael Parsonsa, Arsen Zakariana, Russell G. Jonesa, Linh T. Nguyena, James R. Woodgetta, and Pamela S. Ohashia
a Ontario Cancer Institute, Department of Medical Biophysics, Toronto, Ontario M5G 2M9, Canada

Correspondence to: Pamela S. Ohashi, Ontario Cancer Institute, Dept. of Medical Biophysics, 610 University Ave., Toronto, ON M5G 2M9, Canada. Tel:416-946-4501 ext. 5470 Fax:416-946-2086 E-mail:pohashi{at}oci.utoronto.ca.

Glycogen synthase kinase (GSK)-3 is a protein serine/threonine kinase that regulates differentiation and cell fate in a variety of organisms. This study examined the role of GSK-3 in antigen-specific T cell responses. Using resting T cells from P14 T cell receptor (TCR)-transgenic mice (specific for the lymphocytic choriomeningitis virus and H-2Db), we demonstrated that GSK-3ß was inactivated by serine phosphorylation after viral peptide–specific stimulation in vitro. To further investigate the role of GSK-3, we have generated a retroviral vector that expresses a constitutively active form of GSK-3ß that has an alanine substitution at the regulatory amino acid, serine 9 (GSK-3ßA9). Retroviral transduction of P14 TCR–transgenic bone marrow stem cells, followed by reconstitution, led to the expression of GSK-3ßA9 in bone marrow chimeric mice. T cells from chimeric mice demonstrate a reduction in proliferation and interleukin (IL)-2 production. In contrast, in vitro assays done in the presence of the GSK-3 inhibitor lithium led to dramatically prolonged T cell proliferation and increased IL-2 production. Furthermore, in the presence of lithium, we show that nuclear factor of activated T cells (NF-AT)c remains in the nucleus after antigen-specific stimulation of T cells. Together, these data demonstrate that GSK-3 negatively regulates the duration of T cell responses.

Key Words: signaling, NF-AT, T cell activation, cytokines, lymphocytes


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?


This article has been cited by other articles:



  Home | Help | Feedback | Subscriptions | Archive | Search
TABLE OF CONTENTS