J Biol Chem. 1991 Feb 5;266(4):2017-20.

Interleukin-6 induces the synthesis of tissue inhibitor of metalloproteinases-1/erythroid potentiating activity (TIMP-1/EPA).

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Department of Medicine, University of California, San Diego, La Jolla 92093.

Abstract

This study examines the role of interleukin-6 (IL-6) in connective tissue metabolism. Effects of different preparations of IL-6 on production of collagenase and tissue inhibitor of metalloproteinases-1/erythroid potentiating activity production are studied in human fibroblasts, synoviocytes, and articular chondrocytes. In contrast to interleukin-1 beta (IL-1 beta) and tumor necrosis factor-alpha (TNF alpha), IL-6 does not stimulate the production of collagenase, nor does it modulate the stimulatory effects of IL-1 beta and TNF alpha on the production of this proteinase. Furthermore, IL-6 has no detectable effect on prostaglandin E2 production, an additional proinflammatory response induced by IL-1 beta and TNF alpha. IL-6, however, is identified as a potent inducer of de novo synthesis of tissue inhibitor of metalloproteinases-1/erythroid potentiating activity in all types of connective tissue cells examined. These results define new biological activities of IL-6 and provide further insight into the regulation of connective tissues by cytokines.

PMID:: 1846608; [PubMed - indexed for MEDLINE]

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