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Tenidap and other anion transport inhibitors disrupt cytolytic T lymphocyte-mediated IL-1 beta post-translational processing.

D G Perregaux, L Svensson and C A Gabel
J Immunol July 1, 1996, 157 (1) 57-64;
D G Perregaux
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L Svensson
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C A Gabel
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Abstract

LPS-activated murine peritoneal macrophages produce IL-1 beta but externalize little mature cytokine in the absence of a secondary stimulus, and CTLs previously were reported to serve this capacity. The release of 17-kDa IL-1 beta from LPS-activated BALB/c macrophages occurred rapidly after the addition of C57/B1-derived allogeneic CTLs; within 30 min of coculture, mature IL-1 beta was observed in the medium, and maximum release was achieved within 4 h. CTL-induced post-translational processing was efficient, and >80% of newly synthesized pro-IL-1 beta was released into the medium as the 17-kDa species. Externalization of IL-1 beta required active recognition of the macrophage target by the CTL preparation; C57/B1 CTLs promoted the release of mature IL-1 beta from allogeneic BALB/c macrophages, but not from syngeneic C57/B1 macrophages. In contrast, extracellular ATP promoted mature IL-1 beta release from both macrophage populations. CTL-induced cytokine post-translational processing was blocked by anion transport inhibitors, including 4,4'-diisothiocyanatostilbene-2,2'-disulfonic acid, UK5099, and the anti-inflammatory agent tenidap. An analogue of tenidap, CP-100,829, was more effective as an inhibitor of both IL-1 beta post-translational processing and anion transport. In contrast, the close structural analogue CP-236,492 inhibited neither process. Tenidap's activity was reversible and was not mimicked by cyclooxygenase inhibitors or by cycloheximide. Therefore, tenidap disrupted CTL-induced IL-1 beta post-translational processing by a mechanism dependent on anion transport inhibition. Multiple stimuli are likely to operate in vivo to promote IL-1 beta post-translational processing, and anion transport inhibitors such as tenidap that suppress cytokine processing independently of the initiating stimulus thus represent attractive candidates as therapeutic regulators of IL-1 production.

  • Copyright © 1996 by American Association of Immunologists

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The Journal of Immunology
Vol. 157, Issue 1
1 Jul 1996
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Tenidap and other anion transport inhibitors disrupt cytolytic T lymphocyte-mediated IL-1 beta post-translational processing.
D G Perregaux, L Svensson, C A Gabel
The Journal of Immunology July 1, 1996, 157 (1) 57-64;

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Tenidap and other anion transport inhibitors disrupt cytolytic T lymphocyte-mediated IL-1 beta post-translational processing.
D G Perregaux, L Svensson, C A Gabel
The Journal of Immunology July 1, 1996, 157 (1) 57-64;
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Print ISSN 0022-1767        Online ISSN 1550-6606