Adiponectin is exclusively secreted in adipose tissue and could inhibit the expression of vascular endothelial adhesion molecules induced by TNF-alfa. So, it could be an anti atherogenic effect of adiponectin. In obese subjects and those with type 2 diabetes and IR (whom has a high incidence of coronary atherosclerosis) it was found low plasma levels of adiponectin. Recent studies propose low serum levels of adiponectin as an early marker for metabolic risk in women with PCOS.