IBIS-Flora

Angiosperm Flora of India

Protein kinase C pathway is involved in the inhibition by crocetin of vascular smooth muscle cells proliferation

Publication Type:Journal Article
Year of Publication:2010
Authors:Zhou, C-H, Xiang, M, He, S-Y, Qian, Z-Y
Journal:Phytotherapy Research
Volume:24
Issue:11
Date Published:2010
ISBN Number:1099-1573
Keywords:c-fos, c-jun, c-myc, crocetin, Gardenia, protein kinase C
Abstract:

Crocetin is a natural carotenoid compound isolated from Gardenia jasminoids Ellis. Our previous study showed that crocetin inhibits angiotensin II (Ang II)-induced proliferation of vascular smooth muscle cells (VSMCs). The present study investigated the involvement of the protein kinase C (PKC) pathway in the growth-inhibitory action of crocetin in VSMCs. The findings showed that PKC activity in the membrane fraction of VSMCs increased following stimulation with Ang II, which was suppressed significantly by pretreating the cells with crocetin. Inhibition of PKC activity by crocetin appeared to be associated with growth inhibition in VSMCs, because chelerythrine chloride, a specific PKC inhibitor, likewise decreased cell proliferation. PKC-a, a conventional PKC isoform, was detected in bovine aorta VSMCs by RT-PCR and western blotting analysis. Crocetin inhibited Ang II-induced membrane translocation of PKC-a, and the inhibition of crocetin on PKC activity in membrane fraction coincided with its suppression on membrane translocation of PKC-a. In addition, Ang II-induced mRNA expressions of c-fos, c-jun and c-myc were also decreased by crocetin. Taken together, the data suggest that the inhibition by crocetin of PKC activity, at least in part due to inactivation of PKC-a, and the subsequent suppression of proto-oncogene expressions might mediate its inhibitory effect on VSMCs proliferation. Copyright © 2010 John Wiley & Sons, Ltd.

URL:http://dx.doi.org/10.1002/ptr.3194
Short Title:Phytotherapy Research
Taxonomic name: 
Fri, 2014-01-24 22:41 -- admin
https://secure.gravatar.com/avatar/5ade1b012674ce3dd941e2ea5dd15cc1.jpg?d=https%3A//flora.indianbiodiversity.org/sites/all/modules/patches/contrib/gravatar/avatar.png&s=100&r=G
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith