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L-carnitine could not improve hepatic warm ischemia-reperfusion injury despite ameliorated blood flow.
J Surg Res. 2005 May 01; 125(1):16-22.JS

Abstract

BACKGROUND

Carnitine is applied to ameliorate ischemia-reperfusion (I/R) injury of several organs. However, application to hepatic I/R injury is not frequently reported. The aim of this study was to elucidate the effect of exogenous carnitine administration to ameliorate the warm hepatic I/R injury.

MATERIALS AND METHODS

Male Wistar rats were divided into two groups, a carnitine group (Car);100 mg/kg of l-carnitine administration and a control group (C); vehicle administration. Thirty minutes after administration, the left hepatic lobes were given 60-min ischemia and then reperfused. Plasma alanine aminotransferase (ALT), aspartate aminotransferase (AST), glutamate dehydrogenase (GLDH), tumor necrosis factor (TNF)-alpha, and lipoperoxides (LPO) were measured. Hepatic adenosine triphosphate (ATP) concentration was also measured. The hepatic blood flow was estimated using a Laser Doppler. The presence of apoptosis in the livers was evaluated by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) staining.

RESULTS

In group Car, the blood flow of the left hepatic lobes was better recovered during the reperfusion period than in group C (P < 0.0001). Plasma levels of ALT, AST, GLDH, and TNF-alpha at 1 h after reperfusion were not significantly different between the groups. Although there were no statistical significances, ALT, AST, and TNF-alpha levels in group Car at 24 h after reperfusion tended to be higher than in group C. Plasma LPO levels were not different between the two groups. Also hepatic ATP concentration was not different between the two groups. TUNEL positive liver cells were visible only in group Car at 24 h after reperfusion, but not in the controls.

CONCLUSIONS

Although carnitine administration improved the hepatic blood flow during the reperfusion period, we could not demonstrate a protective effect to the hepatic warm I/R injury.

Authors+Show Affiliations

Department of Surgery, Division of Surgical Research, University of Bonn, Bonn, Germany.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15836845

Citation

Yonezawa, Kei, et al. "L-carnitine Could Not Improve Hepatic Warm Ischemia-reperfusion Injury Despite Ameliorated Blood Flow." The Journal of Surgical Research, vol. 125, no. 1, 2005, pp. 16-22.
Yonezawa K, Tolba RH, Wetter A, et al. L-carnitine could not improve hepatic warm ischemia-reperfusion injury despite ameliorated blood flow. J Surg Res. 2005;125(1):16-22.
Yonezawa, K., Tolba, R. H., Wetter, A., Yamamoto, Y., Yamaoka, Y., & Minor, T. (2005). L-carnitine could not improve hepatic warm ischemia-reperfusion injury despite ameliorated blood flow. The Journal of Surgical Research, 125(1), 16-22.
Yonezawa K, et al. L-carnitine Could Not Improve Hepatic Warm Ischemia-reperfusion Injury Despite Ameliorated Blood Flow. J Surg Res. 2005 May 1;125(1):16-22. PubMed PMID: 15836845.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - L-carnitine could not improve hepatic warm ischemia-reperfusion injury despite ameliorated blood flow. AU - Yonezawa,Kei, AU - Tolba,René H, AU - Wetter,Axel, AU - Yamamoto,Yuzo, AU - Yamaoka,Yoshio, AU - Minor,Thomas, PY - 2004/06/08/received PY - 2004/10/25/revised PY - 2004/11/21/accepted PY - 2005/4/20/pubmed PY - 2005/6/3/medline PY - 2005/4/20/entrez SP - 16 EP - 22 JF - The Journal of surgical research JO - J Surg Res VL - 125 IS - 1 N2 - BACKGROUND: Carnitine is applied to ameliorate ischemia-reperfusion (I/R) injury of several organs. However, application to hepatic I/R injury is not frequently reported. The aim of this study was to elucidate the effect of exogenous carnitine administration to ameliorate the warm hepatic I/R injury. MATERIALS AND METHODS: Male Wistar rats were divided into two groups, a carnitine group (Car);100 mg/kg of l-carnitine administration and a control group (C); vehicle administration. Thirty minutes after administration, the left hepatic lobes were given 60-min ischemia and then reperfused. Plasma alanine aminotransferase (ALT), aspartate aminotransferase (AST), glutamate dehydrogenase (GLDH), tumor necrosis factor (TNF)-alpha, and lipoperoxides (LPO) were measured. Hepatic adenosine triphosphate (ATP) concentration was also measured. The hepatic blood flow was estimated using a Laser Doppler. The presence of apoptosis in the livers was evaluated by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) staining. RESULTS: In group Car, the blood flow of the left hepatic lobes was better recovered during the reperfusion period than in group C (P < 0.0001). Plasma levels of ALT, AST, GLDH, and TNF-alpha at 1 h after reperfusion were not significantly different between the groups. Although there were no statistical significances, ALT, AST, and TNF-alpha levels in group Car at 24 h after reperfusion tended to be higher than in group C. Plasma LPO levels were not different between the two groups. Also hepatic ATP concentration was not different between the two groups. TUNEL positive liver cells were visible only in group Car at 24 h after reperfusion, but not in the controls. CONCLUSIONS: Although carnitine administration improved the hepatic blood flow during the reperfusion period, we could not demonstrate a protective effect to the hepatic warm I/R injury. SN - 0022-4804 UR - https://www.unboundmedicine.com/medline/citation/15836845/L_carnitine_could_not_improve_hepatic_warm_ischemia_reperfusion_injury_despite_ameliorated_blood_flow_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-4804(04)00685-7 DB - PRIME DP - Unbound Medicine ER -