Amino Acids and Hormone Secretion in Pigs

摘要: Amino acids have been implicated in the regulation of hormone synthesis and secretion (Kuhara et al. 1991; Newsholme 2005; Zhen 2012). stimulate or inhibit release some pituitary, pancreatic, gastrointestinal hormones by oral intravenous administration. For example, tyrosine (or phenylalanine) is precursor for epinephrine, norepinephrine, thyroid hormones. Arginine stimulates insulin, growth (GH), prolactin, glucagon, placental lactogen (Flynn 2002). Glutamine leucine also increase insulin from pancreatic E-cells (Newsholme 2005). induce GI such as glucagon-like peptide-1 (GLP-1), cholecystokinin (CCK), ghrelin (Nakamura 2011). The mechanism induced amino may involve membrane depolarization certain receptors transporters. It becoming increasingly recognized that chemosensing involves additional mechanisms. In this chapter, regulations mechanisms on GH–IGF-I axis release, secretion, are discussed.