Abstract
Background: Dysregulated branched amino acid (BCAA) metabolism is an important predictor of impaired insulin sensitivity and cardiovascular dysfunction. BCAA uptake is facilitated by branch chain aminotransferase (BCAT) to yield branched-chain α-keto acids (BCKA). Mitochondrial oxidation of BCKA is catalyzed by branched chain ketoacid dehydrogenase (BCKDH), enzyme sensitive to inhibitory phosphorylation by BCKD kinase. However, the clinical association between dysregulated BCAA catabolism and cardiovascular dysfunction merits investigation. Furthermore, the tissue-specific role of BCAA in inducing insulin resistance (IR) is unexamined.
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