IAI FigSearch
Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Othieno, C.
Right arrow Articles by Toossi, Z.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Othieno, C.
Right arrow Articles by Toossi, Z.

 Previous Article  |  Next Article 

Infection and Immunity, November 1999, p. 5730-5735, Vol. 67, No. 11
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Interaction of Mycobacterium tuberculosis-Induced Transforming Growth Factor beta 1 and Interleukin-10

Catherine Othieno,1 Christina S. Hirsch,2 Beverly D. Hamilton,2 Katalin Wilkinson,2 Jerrold J. Ellner,2 and Zahra Toossi2,3,*

Department of Medicine, Case Western Reserve University and University Hospitals of Cleveland,2 and Veterans Affairs Medical Center,3 Cleveland, Ohio 44106, and Makerere University, Kampala, Uganda1

Received 19 March 1999/Returned for modification 5 May 1999/Accepted 5 August 1999

Mycobacterium tuberculosis is associated with the activation of cytokine circuits both at sites of active tuberculosis in vivo and in cultures of mononuclear cells stimulated by M. tuberculosis or its components in vitro. Interactive stimulatory and/or inhibitory pathways are established between cytokines, which may result in potentiation or attenuation of the effects of each molecule on T-cell responses. Here we examined the interaction of transforming growth factor beta 1 (TGF-beta 1) and interleukin-10 (IL-10) in purified protein derivative (PPD)-stimulated human mononuclear cell cultures in vitro. TGF-beta 1 induced monocyte IL-10 (but not tumor necrosis factor alpha) production (by 70-fold, P < 0.02) and mRNA expression in the absence but not in the presence of PPD. Both exogenous recombinant (r) IL-10 and rTGF-beta 1 independently suppressed the production of PPD-induced gamma interferon (IFN-gamma ) in mononuclear cells from PPD skin test-positive individuals. Synergistic suppression of IFN-gamma in cultures containing both rTGF-beta 1 and rIL-10 was only seen when the responder cell population were peripheral blood mononuclear cells (PBMC) and not monocyte-depleted mononuclear cells and when PBMC were pretreated with rTGF-beta 1 but not with rIL-10. Suppression of PPD-induced IFN-gamma in PBMC containing both rTGF-beta 1 (1 ng/ml) and rIL-10 (100 pg/ml) was 1.5-fold higher (P < 0.05) than cultures containing TGF-beta 1 alone and 5.7-fold higher (P < 0.004) than cultures containing IL-10 alone. Also, neutralization of endogenous TGF-beta 1 and IL-10 together enhanced PPD-induced IFN-gamma in PBMC in a synergistic manner. Thus, TGF-beta 1 and IL-10 together potentiate the downmodulatory effect on M. tuberculosis-induced T-cell production of IFN-gamma , and TGF-beta 1 alone enhances IL-10 production. At sites of active M. tuberculosis infection, these interactions may be conducive to the suppression of mononuclear cell functions.

* Corresponding author. Mailing address: Division of Infectious Diseases, Case Western Reserve University, Biomedical Research Bldg., 10900 Euclid Ave., Cleveland, OH 44106-4984. Phone: (216) 368-4843. Fax: (216) 368-2034. E-mail: zxt2{at}po.cwru.edu.

Infection and Immunity, November 1999, p. 5730-5735, Vol. 67, No. 11
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


This article has been cited by other articles:



Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
J. Bacteriol. J. Virol. Eukaryot. Cell
Microbiol. Mol. Biol. Rev. Clin. Vaccine Immunol. All ASM Journals

Copyright © 1999 by the American Society for Microbiology. All rights reserved.