Exercise-induced changes in metabolic intermediates, hormones, and inflammatory markers associated with improvements in insulin sensitivity.
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OBJECTIVE: To understand relationships between exercise training-mediated improvements in insulin sensitivity (S(I)) and changes in circulating concentrations of metabolic intermediates, hormones, and inflammatory mediators. RESEARCH DESIGN AND METHODS: Targeted mass spectrometry and enzyme-linked immunosorbent assays were used to quantify metabolic intermediates, hormones, and inflammatory markers at baseline, after 6 months of exercise training, and 2 weeks after exercise training cessation (n = 53). A principal components analysis (PCA) strategy was used to relate changes in these intermediates to changes in S(I). RESULTS: PCA reduced the number of intermediates from 90 to 24 factors composed of biologically related components. With exercise training, improvements in S(I) were associated with reductions in by-products of fatty acid oxidation and increases in glycine and proline (P < 0.05, R² = 0.59); these relationships were retained 15 days after cessation of exercise training (P < 0.05, R² = 0.34). CONCLUSIONS: These observations support prior observations in animal models that exercise training promotes more efficient mitochondrial β-oxidation and challenges current hypotheses regarding exercise training and glycine metabolism.
Enzyme-Linked Immunosorbent Assay
Principal Component Analysis
Published Version (Please cite this version)10.2337/dc10-0709
Publication InfoBain, James R; Bateman, LA; Huffman, Kim Marie; Kraus, Virginia Byers; Kraus, William Erle; Muehlbauer, Michael J; ... Wenner, BR (2011). Exercise-induced changes in metabolic intermediates, hormones, and inflammatory markers associated with improvements in insulin sensitivity. Diabetes Care, 34(1). pp. 174-176. 10.2337/dc10-0709. Retrieved from http://hdl.handle.net/10161/10882.
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Associate Professor in Medicine
Associate Professor of Medicine
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Professor of Medicine
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Richard and Pat Johnson University Professor
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W. David and Sarah W. Stedman Professor of Nutrition in the School of Medicine
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Adjunct Assistant Professor of Medicine
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