Heat map of significantly altered lipids (data shown as z-scores) following exposure to 128 µM ciglitazone or 100 µM GW 9662 relative to vehicle-exposed cells (A). Relative lipid abundance divided into lipid class and treatment (B). Asterisk (*) indicates a significant difference (p < 0.05) in lipid abundance relative to vehicle. Sum of relative lipid abundance by treatment (C). Relative abundance of cholesterol and sterol esters following exposure to vehicle (0.1% DMSO), 128 µM ciglitazone, or 100 µM GW 9662 (D). PC: Phosphatidylcholine, PE: Phosphatidylethanolamine, PS: Phosphatidylserine, SM: Sphingomyelin, TG: Triacylglyceride.