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Effects of Long‐Term Mildronate Treatment on Cardiac and Liver Functions in Rats
Author(s) -
Liepinsh Edgars,
Kuka Janis,
Svalbe Baiba,
Vilskersts Reinis,
Skapare Elina,
Cirule Helena,
Pugovics Osvalds,
Kalvinsh Ivars,
Dambrova Maija
Publication year - 2009
Publication title -
basic and clinical pharmacology and toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.805
H-Index - 90
eISSN - 1742-7843
pISSN - 1742-7835
DOI - 10.1111/j.1742-7843.2009.00461.x
Subject(s) - carnitine , cardiac function curve , pharmacology , medicine , toxicity , liver function , endocrinology , chemistry , heart failure
Mildronate is a cardioprotective drug that improves cardiac function during ischaemia and functions by lowering l ‐carnitine concentration in body tissues and modulating myocardial energy metabolism. The aim of the present study was to characterise cardiovascular function and liver condition after long‐term mildronate treatment in rats. In addition, changes in the plasma lipid profile, along with changes in the concentration of mildronate, l ‐carnitine and γ‐butyrobetaine were monitored in the rat tissues. Wistar rats were perorally treated daily with a mildronate dose of either 100, 200 or 400 mg/kg for 4, 8 or 12 weeks. The l ‐carnitine‐lowering effect of mildronate was dose‐dependent. However, the carnitine levels reached a plateau after about four weeks of treatment. During the additional weeks of treatment, the carnitine levels were not considerably changed. The obtained results provide evidence that even a high dose of mildronate does not alter cardiovascular parameters and the function of isolated rat hearts. Furthermore, the histological evaluation of liver tissue cryosections and measurement of biochemical markers of hepatic toxicity showed that all the measured values were within the normal reference range. Our results provide evidence that long‐term mildronate administration induces significant changes in carnitine homeostasis, but it is not associated with cardiac impairment or disturbances in liver function.