ADIPOQ and type 2 diabetes mellitus: Since the discovery of adiponectin in 1995 [1], this hormone, mainly secreted by the adipose tissue and initially called adipocyte complement-related protein of 30 kDa (Acrp30), has drawn a great deal of attention due to its possible protective effect against type 2 diabetes, its anti-inflammatory effects and its anti-atherogenic properties [2,3,4,5].