Intracellular signal transduction in proliferation of synovial cells.

Abstract:

:We investigated some steps in the signal transduction pathway leading to the proliferation of synovial cells. 12-o-tetradecanoyl phorbol-13-acetate (TPA) which is known to stimulate phospholipid- and Ca(2+)-dependent protein kinase (C-kinase) enhanced the proliferation of synovial cells. The proliferation of synovial cells induced by interleukin-1 beta. Tumour necrosis factor alpha and granulocytes/macrophages colony stimulating factor, was inhibited by a potent C-kinase inhibitor, H7. These findings strongly suggested that the signal transduction pathway leading to proliferation of synovial cells is transmitted via C-kinase activation. Prostaglandin E2, which is known to stimulate adenylate cyclase, leading to the elevation of intracellular c-AMP level, inhibited the proliferation of synovial cells. This effect could also be mimicked by the addition of a cell permeable c-AMP analog, dibutyryl c-AMP or theophylline. Studies suggest that the feedback signal for proliferation of synovial cells was transmitted through c-AMP. We therefore conclude that signals for stimulation and inhibition of synovial cell proliferation are transmitted through different pathways.

journal_name

Clin Rheumatol

journal_title

Clinical rheumatology

authors

Yamamoto M,Yasuda M,Shiokawa S,Nobunaga M

doi

10.1007/BF02207092

subject

Has Abstract

pub_date

1992-03-01 00:00:00

pages

92-6

issue

1

eissn

0770-3198

issn

1434-9949

journal_volume

11

pub_type

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