Alves 2021 Eur J Nutr

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Alves BL, AraΓΊjo TDR, GuimarΓ£es DSPSF, Zoppi CC, Figueiredo MS, Carneiro EM (2021) Amino acid restriction alters survival mechanisms in pancreatic beta cells: possible role of the PI3K/Akt pathway. Eur J Nutr 60:3947-57.

Β» PMID: 33913012 Open Access

Alves Bruna Lourenconi, Araujo Thiago Dos Reis, Guimaraes Dimitrius Santiago Passos Simoes Froes, Zoppi Claudio Cesar, Figueiredo Mariana Sarto, Carneiro Everardo Magalhaes (2021) Eur J Nutr

Abstract: Malnutrition in the early stages of life may lead to changes in the glycemic metabolism during adulthood, such as pancreatic beta cells dysfunction and failure. Therefore, this study aimed to evaluate the effects of an in vitro amino acid restriction model on the function and viability of pancreatic beta cells.

Insulin-producing cells (INS-1E) were maintained in control or amino acid restricted culture medium containing 1 Γ— or 0.25 Γ— of amino acids, respectively, for 48 h.

Amino acid restricted group showed lower insulin secretion and insulin gene expression, reduced mitochondrial oxygen consumption rate and reactive oxygen species production. Besides, amino acid restricted group also showed higher levels of endoplasmic reticulum stress and apoptosis markers and enhanced Akt phosphorylation. However, even with higher levels of apoptosis markers, amino acid restricted group did not show higher levels of cell death unless the PI3K/Akt pathway was inhibited.

Amino acid restricted beta cell viability seems to be dependent on the PI3K/Akt pathway. β€’ Keywords: Apoptosis, Cell viability, Heat shock protein, Insulin secretion, Redox balance β€’ Bioblast editor: Plangger M

Labels: MiParea: Respiration, Exercise physiology;nutrition;life style 

Organism: Rat  Tissue;cell: Islet cell;pancreas;thymus  Preparation: Intact cells 

Coupling state: LEAK, ROUTINE, ET  Pathway: ROX  HRR: Oxygraph-2k 


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