Abstract：
:While carnitine overload appears to have therapeutic effects in pathological situations such as heart recovery after ischemia, its benefits as dietary supplementation for aerobic exercise have been questioned. We studied the effect of carnitine supplementation on the response of perfused rat heart to ischemia and reperfusion. Supplementation of the perfusion medium with 1 mM carnitine had no effect on cardiac performance in normoxic hearts, although it lowered lactate production by nearly 80%. Carnitine did not affect the amount of lactate accumulated during 30 min of ischemia, which was recovered in the perfusate immediately after reperfusion. However, carnitine worsened tissue injury, as shown by the 70% increase in creatine kinase release. Carnitine also worsened the recovery of contractile function, as revealed by the slower increase in heart rate and contractile force. In addition, carnitine supplementation increased contracture of the heart shortly after reperfusion. Therefore, in conditions where it does not increase glucose oxidation, carnitine supplementation worsens both injury and recovery of contractile function after transient ischemia in perfused rat heart.
journal_name
J Physiol Biochemjournal_title
Journal of physiology and biochemistryauthors
Díaz R,Lorita J,Soley M,Ramírez Idoi
10.1007/BF03168229subject
Has Abstractpub_date
2008-03-01 00:00:00pages
1-8issue
1eissn
1138-7548issn
1877-8755journal_volume
64pub_type
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