Year: 2015
Type: dissertation
Abstract: Monocyte-derived microparticles (MPs) have been suggested to link cardiovascular risk factors to vascular injury. We hypothesized that adiponectin, an anti-inflammatory and vasculoprotective adipokine, limits the production and/or action of monocytic MPs on endothelial cells. Adiponectin attenuated MP release from untreated THP-1 monocytes and lipopolysaccharide (LPS)-treated conditions. Furthermore, peritoneal monocytes from Adipoq−/− mice generated significantly greater MPs than those from Adipoq+/+ littermates in the absence and presence of LPS. LPS-induced MP expression of NLRP3 inflammasome and its principal components, namely cleaved ASC, caspase-1, and IL-1β (pro- and cleaved), were all markedly attenuated by adiponectin treatment. HUVECs incubated with MPs from LPS-treated THP-1 cells exhibited an increase in the expression of VCAM-1; adiponectin inhibited this effect. The effects of adiponectin on MP release and molecular signaling occurred at least in part through modulation of the AMPK-Akt and NFκB pathways. The findings highlight another pleiotropic effect of adiponectin in limiting endothelial activation.
Source: TSpace (University of Toronto)
Author: Mehroz Ehsan
Language: English
Subfield: Endocrinology, Diabetes and Metabolism
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W2607652562