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- W3217123087 abstract "Our health requires continual protein synthesis for maintaining and repairing tissues. For protein synthesis to function, all the essential (indispensable) amino acids (IAA) that must be available in the diet, along with those AAs that the cells can synthesize, the dispensable amino acids. Here we review studies that have shown the location of the detector for IAA deficiency in the brain, specifically for recognition of IAA deficient diets (IAAD diets) in the anterior piriform cortex (APC), with subsequent responses in downstream brain areas. The APC is highly excitable, uniquely suited to serve as an alarm for reductions in IAAs. With a balanced diet, these neurons are kept from over-excitation by GABAergic inhibitory neurons. Because several transporters and receptors on the GABAergic neurons have rapid turnover times, they rely on intact protein synthesis to function. When an IAA is missing, its unique tRNA cannot be charged. This activates the enzyme General Control Nonderepressible 2 (GCN2) that is important in the initiation phase of protein synthesis. Without the inhibitory control supplied by GABAergic neurons, excitation in the circuitry is free to signal an urgent alarm. Studies in rodents have shown rapid recognition of IAA deficiency by quick rejection of the IAAD diet." @default.
- W3217123087 created "2021-12-06" @default.
- W3217123087 creator A5042605510 @default.
- W3217123087 date "2021-11-23" @default.
- W3217123087 modified "2023-09-24" @default.
- W3217123087 title "Brain Signaling of Indispensable Amino Acid Deficiency" @default.
- W3217123087 doi "https://doi.org/10.20944/preprints202111.0428.v1" @default.
- W3217123087 hasPublicationYear "2021" @default.
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