The Journal of Experimental Medicine
Randox
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

Published online 4 September 2001. doi:10.1084/jem.194.5.629
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow PPT slides of all figures
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 Nakamura, K.
Right arrow Articles by Strober, W.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Nakamura, K.
Right arrow Articles by Strober, W.
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, 0022-1007/2001/9/629/ $5.00
The Journal of Experimental Medicine, Volume 194, Number 5, September 3, 2001 629-644


Original Article

Cell Contact–dependent Immunosuppression by CD4+CD25+ Regulatory T Cells Is Mediated by Cell Surface–bound Transforming Growth Factor ß

Kazuhiko Nakamuraa, Atsushi Kitania, and Warren Strobera
a Mucosal Immunity Section, Laboratory of Clinical Investigation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892

Correspondence to: Warren Strober, National Institutes of Health, Building 10, Rm. 11N238, 10 Center Dr., Bethesda, MD 20892. Tel:301-496-6810 Fax:301-402-2240 E-mail:wstrober{at}niaid.nih.gov.

CD4+CD25+ T cells have been identified as a population of immunoregulatory T cells, which mediate suppression of CD4+CD25- T cells by cell–cell contact and not secretion of suppressor cytokines. In this study, we demonstrated that CD4+CD25+ T cells do produce high levels of transforming growth factor (TGF)-ß1 and interleukin (IL)-10 compared with CD4+CD25- T cells when stimulated by plate-bound anti-CD3 and soluble anti-CD28 and/or IL-2, and secretion of TGF-ß1 (but not other cytokines), is further enhanced by costimulation via cytotoxic T lymphocyte–associated antigen (CTLA)-4. As in prior studies, we found that CD4+CD25+ T cells suppress proliferation of CD4+CD25- T cells; however, we observed here that such suppression is abolished by the presence of anti–TGF-ß. In addition, we found that CD4+CD25+ T cells suppress B cell immunoglobulin production and that anti–TGF-ß again abolishes such suppression. Finally, we found that stimulated CD4+CD25+ T cells but not CD4+CD25- T cells express high and persistent levels of TGF-ß1 on the cell surface. This, plus the fact that we could find no evidence that a soluble factor mediates suppression, strongly suggests that CD4+CD25+ T cells exert immunosuppression by a cell–cell interaction involving cell surface TGF-ß1.

Key Words: T lymphocytes, suppressor-effector, CD4-positive T lymphocytes, receptors, interleukin 2, transforming growth factors, autoimmune diseases


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