Abstract
In the literature an important role for carnitine has been discussed in myocardial ischemia and several non-ischemic heart diseases. The presumably broad spectrum of carnitine effects in the heart is based on the central role of this compound in fatty acid oxidation and in the control of intermediary metabolism [1–3]. Long-chain acyl-CoA esters may only penetrate into the mitochon-drial matrix in the form of their carnitine esters, and intracellular concentrations of long-chain acyl-CoA and long-chain acylcarnitine as well as free CoA depend on the availability of free carnitine. Thus, this availability controls basic cellular functions such as energy production and energy transport from the mitochondria into cytoplasm. The interaction between carnitine and potentially toxic products of fatty acid metabolism, as long-chain acyl-CoA esters, may explain the protection of mitochondrial function and the modulation of the adenine nucleotide translocator activity by carnitine as well as its effects on the integrity and fluidity of sarcolemmal membranes.
“In heart failure, the myocardial carnitine level can decrease to concentrations in the range of the KM of carnitine palmityltransferase for free carnitine. Thus, in these cases a reduced availability of free carnitine may limit the transferase reaction and thereby fatty acid oxidation.”
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Regitz-Zagrosek, V., Fleck, E. (1995). Myocardial carnitine deficiency in human cardiomyopathy. In: De Jong, J.W., Ferrari, R. (eds) The Carnitine System. Developments in Cardiovascular Medicine, vol 162. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0275-9_11
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DOI: https://doi.org/10.1007/978-94-011-0275-9_11
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