Palmitate induces COX-2 expression via the sphingolipid pathway-mediated activation of NF-κB, p38, and ERK in human dermal fibroblasts.

Abstract:

:It has been suggested that free fatty acids (FFA) such as palmitate, which are secreted from enlarged adipocytes in the subcutaneous fat of obese subjects, serve as a link between obesity and altered skin functions. Cyclooxygenease-2 (COX-2) and prostanoids participate in the induction of impaired dermal function. In the current study, we investigated the issue of whether palmitate induces COX-2 expression via the sphingolipid pathway-mediated activation of NF-κB or mitogen-activated protein kinase (MAPK) pathways in human dermal fibroblasts. Palmitate treatment significantly induced COX-2 expression and prostaglandin E2 (PGE2) release in human dermal fibroblasts. In addition, pre-treatment with triacsin C, an inhibitor of acyl-CoA synthetase in de novo ceramide synthesis, was found to reduce palmitate-induced COX-2 expression and PGE2 release in human dermal fibroblast. The findings also show that palmitate-induced COX-2 expression and PGE2 release are mediated by the NF-κB, p38, and extracellular signal-regulated kinase (ERK) MAPK pathways. These findings point to a new mechanism for explaining the link between increased FFAs in obesity and impaired dermal function.

journal_name

Arch Dermatol Res

authors

Oh E,Yun M,Kim SK,Seo G,Bae JS,Joo K,Chae GT,Lee SB

doi

10.1007/s00403-013-1434-6

subject

Has Abstract

pub_date

2014-05-01 00:00:00

pages

339-45

issue

4

eissn

0340-3696

issn

1432-069X

journal_volume

306

pub_type

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