Publication: The induction of cyclooxygenase-2 by 17β-estradiol in endothelial cells is mediated through protein kinase C
Issued Date
2000-10-16
Resource Type
ISSN
10233830
Other identifier(s)
2-s2.0-0033802870
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Inflammation Research. Vol.49, No.9 (2000), 460-465
Suggested Citation
P. Akarasereenont, K. Techatraisak, A. Thaworn, S. Chotewuttakorn The induction of cyclooxygenase-2 by 17β-estradiol in endothelial cells is mediated through protein kinase C. Inflammation Research. Vol.49, No.9 (2000), 460-465. doi:10.1007/s000110050617 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/25851
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
The induction of cyclooxygenase-2 by 17β-estradiol in endothelial cells is mediated through protein kinase C
Other Contributor(s)
Abstract
Objective and Design: We investigated whether estrogen affected COX isoform expressed in human umbilical vein endothelial cells (HUVEC). Materials and Methods: HUVEC were grown to confluence and replaced with fresh medium containing 17β-estradiol (0.001, 0.01, 0.1 and 1 nM) or 17β-estradiol (1 nM) plus staurosporine (0.1, 1 and 10 ng/ml) for 24 h, after which the supernatant medium was collected to measure 6-keto-PGF(1α) using enzyme immunoassay. To measure COX activity via exogenous substrates, the remaining cells were replaced with fresh medium containing arachidonic acid (10 μM for 10 min), and then the medium was removed to measure 6-keto-PGF(1α). The COX isoform expressed in cells was detected by immunoblotting using specific antibody. Results: 17β-estradiol (0.001 to 1 nM) increased the production of 6-keto-PGF(1α) via either endogenous or exogenous substrate in a dose dependent manner. These increases were significantly inhibited when cells were coincubated with staurosporine. Interestingly, only COX-2 protein, but not COX-1 protein, was induced in 17β-estradiol treated HUVEC and was also inhibited by staurosporine. Conclusion: Our data showed that 17β-estradiol increased the release of PGI2from HUVEC via the induction of COX-2 which was mediated through protein kinase C. The results suggested that COX-2 might have a role in the cardiovascular protective effect of estrogen.