GSK3787S8025

GSK3787 irreversibly antagonizes human and mouse PPARδ that covalently modifies Cys249 within the ligand binding pocket. GSK 3787 completely antagonizes the activity of agonist GW501516 with a pIC50 of 6.9 and 94% maximal inhibition. GSK3787 (1 μM) effectively antagonizes the agonist GW0742 stimulated transcription of CPT1a and PDK4 in human skeletal muscle cells, and effectively antagonize the basal gene expression of CPT1a. GSK 3787 shows no effective antiproliferative activity against colorectal cancer cells. ^[1] GSK3787 (1 μM) completely antagonizes 50 nM GW0742-induced PPARβ/δ-dependent Angptl4 gene expression in wild-type fibroblasts and in keratinocytes. GSK3787 (1 μM) largely antagonizes 50 nM GW0742-induced Angptl4 and Adrp mRNAs expression in skin cancer cell A341. GSK3787 (1 μM) largely antagonizes GW0742-induced Angptl4 mRNAs expression in cancer cell lines MCF7 (breast), Huh7 (liver), and HepG2 (liver) cells but not in H1838 or A549 cells (lung). GSK3787 (1 μM) largely antagonizes GW0742-induced increase of Adrp mRNA in Huh7 and HepG2 cells but not in H1838 cells. GSK3787 does not antagonize basal expression of either of these two PPARβ/δtarget genes in these cells. Neither GW0742 nor GSK3787 has any effect on cell proliferation of these cells at concentrations ranging from 0.1 to 10 μM. GSK3787 is able to modulate the association of both PPARβ/δ and PPARγ coregulator peptides in response to ligand activation. Efficacy of GSK3787 to modulate PPARγ activity is markedly lower than the efficacy of GSK3787 to act as a PPARβ/δ antagonist