PMID- 10381186 OWN - NLM STAT- MEDLINE DCOM- 19990909 LR - 20190826 IS - 0891-5849 (Print) IS - 0891-5849 (Linking) VI - 26 IP - 9-10 DP - 1999 May TI - L-carnitine attenuates doxorubicin-induced lipid peroxidation in rats. PG - 1158-65 AB - Doxorubicin (DOX) was administered intraperitoneally to rats in six equal, 2.5 mg/kg doses over a 2-week period with or without L-carnitine. Injury was monitored by echocardiography, release of myosin light chain-1 (MLC-1), and by measurement of aldehydic lipid peroxidation products. General observation revealed that DOX alone caused more ascites than DOX plus L-carnitine. Animals sacrificed 2 h after the sixth dose had significantly higher aldehyde concentrations than 2 h after a single dose of DOX. Aldehydes in plasma and heart remained elevated for 3 weeks after the final dose of DOX, whereas L-carnitine prevented or attenuated the DOX-induced increases in lipid peroxidation. The increase in MLC-1 2 h after the sixth dose of DOX was greater than after a single dose, suggesting cumulative damage. Echocardiography did not detect either early injury or the protective effects of L-carnitine. These data indicate that lipid peroxidation following DOX occurs early, and parallels the cumulative characteristics of DOX-induced cardiotoxicity. The protective effects of L-carnitine may be due to improved cardiac energy metabolism and reduced lipid peroxidation. FAU - Luo, X AU - Luo X AD - Department of Pediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada. FAU - Reichetzer, B AU - Reichetzer B FAU - Trines, J AU - Trines J FAU - Benson, L N AU - Benson LN FAU - Lehotay, D C AU - Lehotay DC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Free Radic Biol Med JT - Free radical biology & medicine JID - 8709159 RN - 0 (Aldehydes) RN - 0 (Antibiotics, Antineoplastic) RN - 0 (Myosin Light Chains) RN - 80168379AG (Doxorubicin) RN - S7UI8SM58A (Carnitine) SB - IM MH - Aldehydes/blood/metabolism MH - Animals MH - Antibiotics, Antineoplastic/administration & dosage/*antagonists & inhibitors/*toxicity MH - Carnitine/administration & dosage/*pharmacology MH - Doxorubicin/administration & dosage/*antagonists & inhibitors/*toxicity MH - Echocardiography MH - Heart/drug effects/physiopathology MH - Lipid Peroxidation/*drug effects MH - Male MH - Myocardial Contraction/drug effects MH - Myocardium/metabolism MH - Myosin Light Chains/metabolism MH - Rats MH - Rats, Wistar EDAT- 1999/06/25 00:00 MHDA- 1999/06/25 00:01 CRDT- 1999/06/25 00:00 PHST- 1999/06/25 00:00 [pubmed] PHST- 1999/06/25 00:01 [medline] PHST- 1999/06/25 00:00 [entrez] AID - S0891-5849(98)00303-7 [pii] AID - 10.1016/s0891-5849(98)00303-7 [doi] PST - ppublish SO - Free Radic Biol Med. 1999 May;26(9-10):1158-65. doi: 10.1016/s0891-5849(98)00303-7.