UCP-1 expression in fMSC 9+4 adipocytes can be induced by Rosiglitazone treatment, and reduced by the ERRα inverse agonist.
mRNA expression determined by qPCR
A)UCP-1 expression following Rosiglitazone or XCT790 treatment for 48 hours. * p=<0.05, ** = p<0.005.
B)UCP-1 expression after 48 hour treatment with PPARg anatagonist G3335 * = p<0.05.
C) Chromatin Immunoprecipitation showing ERRa bound to the UCP1 enhancer element in differentiated 9+4 fMSCs, but not to a region in the coding sequence of the same gene.
D) Reporter assay using this construct in Cos-1 cells. ERRa activates the enhancer, and its activity is further trans-activated by PGC1a and repressed by RIP140. The ERRa inverse agonist XCT790 prevents this induction.
E) ERRα expression in 10+1 and 9+4 isolates before and after 21 days adipogenic differentiation. mRNA expression by qPCR. Error Bars indicate SD.