Metabolismo de carnosina, suplementação de β-alanina e desempenho físico: uma atualização - PARTE I
Year: 2015
Type: article
Abstract: Carnosine metabolism, β-alanine supplementation and performance: an update - Part IThe physiological role of carnosine has attracted recent interest, even though it is a substance studied for years. It is formed by amino acids (β-alanyl and L-histidine) and together with their methylated analogues (anserine and balenine) are part of the class of histidine-containing dipeptides (HCDs, English Histidine-containing dipeptides), which are abundantly found in a wide range of terrestrial and aquatic animals. Higher concentrations are in the olfactory bulb and skeletal muscle being a lesser extent in regions of the central nervous system, cerebrospinal fluid, kidney and spleen. The physiological roles attributed to it are: buffering function especially in type II fibers; antioxidant and improves the release of calcium from the sarcoplasmic reticulum, and the sensitivity of the contractile apparatus to calcium. Supplementation of β-alanine is the most efficient way to increase muscle carnosine, and has been receiving substantial highlight in the sports nutrition area in recent years. This nutritional strategy presents a "dose -response" effect from acute ingestion, as well as paresthesia as a side effect. Until these days the exactly washout period of carnosine in the skeletal muscle remains uncertain after β-alanine supplementation interruption. Future studies should be conducted to evaluate other possible mechanisms of action of carnosine and confirm existing ones.
Institution: Universidade de São Paulo
Language: English
Subfield: Physiology (medical)
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W2164088289