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Cutting edge: CD40 engagement up-regulates cyclooxygenase-2 expression and prostaglandin E production in human lung fibroblasts

Journal of Immunology, ISSN: 0022-1767, Vol: 160, Issue: 3, Page: 1053-1057
1998
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Article Description

A newly emerging view of fibroblasts is that they are vital for initiating inflammation and respond to and direct the activities of leukocytes. Human fibroblasts can express CD40, an activation Ag the ligand of which is displayed by activated leukocytes. We demonstrate here that CD40 engagement on human lung fibroblasts dramatically increase proinflammatory PGE synthesis. This up-regulation is mediated through an induction of cyclooxygenase-2 (Cox-2) since Cox-2-selective inhibitors block the up- regulation. Western and Northern blot analyses demonstrated that Cox-2 protein and mRNA are dramatically increased in fibroblasts following CD40 engagement. We conclude that CD40 is a major pathway in human fibroblasts for the induction of Cox-2. There is intense interest in devising strategies for disruption of the CD40-CD40 ligand system to blunt inflammation. Such an intervention would be expected to attenuate the up-regulation of fibroblast Cox-2 and PGE production at the site of tissue injury.

Bibliographic Details

Ying Zhang; Beth Graf; Richard P. Phipps; H. James Cao; Heather Meekins; Terry J. Smith

Oxford University Press (OUP)

Medicine; Immunology and Microbiology

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