Spexin, or neuropeptide Q, is an endogenous galanin receptor 2/3 agonist with EC50 values of 45 and 112 nM respectively, and no significant activity at galanin receptor 1. Spexin is a satiety inducing peptide which inhibits long chain fatty acid uptake by adipocytes and decreases food consumption in diet induced obese mice and rats. Spexin gene expression is markedly down regulated in obese human fat. Spexin also posseses anxiolytic properties.
