Scheme 1: Atherogenic ω-6 lipids modulate PPAR-Egr-1 crosstalk. A schematic representation of a possible mechanism by which ω-6 lipids and their oxidized forms regulate PPAR-Egr-1 crosstalk in a time-mediated fashion and thereby altering smooth muscle cell function. ω-6 lipids seemed to have a time-dependent modulation of PPAR isotypes, PPARα at acute phase and PPARγ at subacute phase. This modulation of PPAR isotype altered the ability of these lipids to exert an antiatherogenic effects via PPARs or proatherogenic effects via Egr-1.