Halothane and sevoflurane decrease norepinephrine-stimulated glucose transport in neonatal cardiomyocyte.

UNLABELLED: Catecholamine regulates myocardial glucose use. However, the effect of inhaled anesthetics on myocardial glucose transport stimulated by catecholamine is unclear. We studied the effect of halothane and sevoflurane on uptake of 2-deoxyglucose stimulated by norepinephrine in neonatal cardiomyocytes and the mechanism that modulates glucose transport. We studied the effects of halothane and sevoflurane on norepinephrine (NE)-stimulated glucose uptake and the effects of halothane and sevoflurane on glucose uptake stimulated by W7 (a calcium releasing agent), phorbol 12 myristate-13-acetate (a protein kinase C agonist), and LiCl. Sevoflurane decreased NE-stimulated glucose uptake from 63.7 +/- 7.0 to 41.2 +/- 3.7 pmol h(-1) mg protein(-1), and halothane also attenuated NE-stimulated glucose uptake to 37.8 +/- 5.7 pmol h(-1) mg protein(-1). W7 at 10 micromol/L increased glucose uptake from 16.4 +/- 1.4 to 41.2 +/- 3. 4 pmol h(-1) mg protein(-1). The stimulation was inhibited in the presence of 0.8 mmol/L sevoflurane and 0.58 mmol/L halothane to 23.9 +/- 3.7 and 25.6 +/- 3.6 pmol h(-1) mg protein(-1), respectively. Halothane and sevoflurane did not significantly affect the glucose uptake stimulated by 1 nmol/L insulin, 10 micromol/L PMA, or 10 mmol/L LiCl. We conclude that halothane and sevoflurane decrease NE-stimulated glucose uptake through decrease in intracellular calcium in cardiomyocytes. IMPLICATIONS: The effect of inhaled anesthetics on myocardial glucose uptake during administration of catecholamine is unclear. The myocardial glucose uptake is stimulated not only by catecholamine, but also by insulin, protein kinase C, and increase of intracellular calcium. We examined the effects of halothane and sevoflurane on glucose uptake.