section_path: Endocrine functions of skeletal muscle
section_name: Endocrine functions of skeletal muscle
paragraph_text: Endocrine functions of skeletal muscle
  
  As pointed out in the Introduction to this article, under different physiological conditions, subsets of 654 different proteins as well as lipids, amino acids, metabolites and small RNAs occur in the secretome of skeletal muscles. As described in the Wikipedia article " List of human endocrine organs and actions ", skeletal muscle is identified as an endocrine organ due to its secretion of cytokines and other peptides produced by skeletal muscle as signaling molecules. Iizuka et al., indicated that skeletal muscle is an endocrine organ because it "synthesizes and secretes multiple factors, and these muscle derived-factors exert beneficial effects on peripheral and remote organs." The altered secretomes after endurance training or resistance training as well as the secretome of sedentary muscle appear to have many effects on distant tissues.