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Publication Record


β-Aminoisobutyric acid induces browning of white fat and hepatic β-oxidation and is inversely correlated with cardiometabolic risk factors.
Roberts LD, Boström P, O'Sullivan JF, Schinzel RT, Lewis GD, Dejam A, Lee YK, Palma MJ, Calhoun S, Georgiadi A, Chen MH, Ramachandran VS, Larson MG, Bouchard C, Rankinen T, Souza AL, Clish CB, Wang TJ, Estall JL, Soukas AA, Cowan CA, Spiegelman BM, Gerszten RE
(2014) Cell Metab 19: 96-108
MeSH Terms: Adipocytes, Brown, Adipocytes, White, Adipose Tissue, Brown, Adipose Tissue, White, Aminoisobutyric Acids, Animals, Cardiovascular Diseases, Cell Differentiation, Exercise, Gene Expression Regulation, Glucose Tolerance Test, Humans, Induced Pluripotent Stem Cells, Liver, Metabolic Diseases, Mice, Organ Specificity, Oxidation-Reduction, PPAR alpha, Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, Phenotype, Physical Conditioning, Animal, Risk Factors, Transcription Factors, Transcription, Genetic, Weight Gain
Show Abstract · Added February 28, 2014
The transcriptional coactivator peroxisome proliferator-activated receptor-gamma coactivator-1α (PGC-1α) regulates metabolic genes in skeletal muscle and contributes to the response of muscle to exercise. Muscle PGC-1α transgenic expression and exercise both increase the expression of thermogenic genes within white adipose. How the PGC-1α-mediated response to exercise in muscle conveys signals to other tissues remains incompletely defined. We employed a metabolomic approach to examine metabolites secreted from myocytes with forced expression of PGC-1α, and identified β-aminoisobutyric acid (BAIBA) as a small molecule myokine. BAIBA increases the expression of brown adipocyte-specific genes in white adipocytes and β-oxidation in hepatocytes both in vitro and in vivo through a PPARα-mediated mechanism, induces a brown adipose-like phenotype in human pluripotent stem cells, and improves glucose homeostasis in mice. In humans, plasma BAIBA concentrations are increased with exercise and inversely associated with metabolic risk factors. BAIBA may thus contribute to exercise-induced protection from metabolic diseases.
Copyright © 2014 Elsevier Inc. All rights reserved.
1 Communities
1 Members
0 Resources
26 MeSH Terms
Role of insulin in the intermediary metabolism of the activated thymic-derived lymphocyte.
Helderman JH
(1981) J Clin Invest 67: 1636-42
MeSH Terms: 3-O-Methylglucose, Aminoisobutyric Acids, Animals, Biological Transport, Carbon Dioxide, Insulin, Lactates, Male, Methylglucosides, Mitogens, Oxidation-Reduction, Rats, Receptor, Insulin, T-Lymphocytes
Show Abstract · Added April 21, 2014
The hypothesis that a role for insulin in the metabolism of T cells would be evident after cell activation when receptors appear was tested to validate the T cell model and to analyze the mechanism by which insulin may function in immunoregulation. Measuring the flux rates of 3-O-[methyl-3H]-D-glucose and aminoisobutyric acid, alpha-[1-14C], lactate production and oxidation, and glucose oxidation from carbon 1- and carbon 6-labeled substrates, it was determined that (a) mitogens such as phytohemagglutinin enhance basal T lymphocyte intermediary metabolism, (b) physiologic concentrations of insulin have no impact on the metabolism of unstimulated, cultured, receptor-negative lymphocytes, and (c) insulin provided to receptor bearing lymphocytes augments intermediary metabolism above mitogen stimulated levels. The importance of the pentose phosphate shunt pathway for energy metabolism in the stimulated lymphocyte was confirmed. These studies demonstrate that insulin has a classical physiologic role to play in the activated lymphocyte further validating the use of this cell to examine potential receptor defects in disorders of carbohydrate metabolism. By enhancing energy metabolism of stimulated lymphocytes, insulin serves biologic economy and thus may perform its immunoregulatory role.
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1 Members
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14 MeSH Terms