Skeletal muscle is an important tissue which functions as an endocrine organ and secretes the factors called myokine. Irisin is a thermogenic peptide which has been recently defined as a new myokine. The physiological roles of these peptides have been revealed in recent studies. The purpose of this review is to explain the known physiological roles of irisin.
Irisin, myokine, endocrine system, energy metabolism, physiological roles