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Alpha-lipoic acid protects against renal ischaemia-reperfusion injury in rats.
Clin Exp Pharmacol Physiol. 2008 Mar; 35(3):249-55.CE

Abstract

1. Oxygen free radicals are important components involved in the pathophysiological processes observed during ischaemia-reperfusion (I/R). The present study was designed to assess the possible protective effect of alpha-lipoic acid (ALA) on renal I/R injury. 2. Wistar albino rats were unilaterally nephrectomized and subjected to 45 min renal pedicle occlusion followed by 24 h reperfusion. Saline or ALA (100 mg/kg, i.p.) was administered 15 min prior to ischaemia and immediately before the reperfusion period. At the end of 24 h, rats were decapitated and trunk blood was collected. Creatinine, blood urea nitrogen (BUN) and lactate dehydrogenase (LDH) activity were measured in serum samples, whereas tumour necrosis factor (TNF)-alpha, interleukin (IL)-1beta, IL-6, 8-hydroxydeoxyguanosine (8-OHdG) and total anti-oxidant capacity (AOC) were assayed in plasma samples. 3. Kidney samples were taken for the determination of tissue malondialdehyde (MDA) and glutathione (GSH) levels, as well as Na(+)/K(+)-ATPase and myeloperoxidase (MPO) activity. The formation of reactive oxygen species in renal tissue samples was monitored using a chemiluminescence (CL) technique with luminol and lucigenin probes. Oxidant-induced tissue fibrosis was determined by tissue collagen content and the extent of tissue injury was analysed microscopically. 4. Ischaemia-reperfusion caused a significant increases in blood creatinine, BUN, LDH, IL-1beta, IL-6, TNF-alpha and 8-OHdG, whereas AOC was decreased. In kidney samples from the I/R group, MDA, MPO, collagen and CL levels were found to be increased significantly; however, glutathione levels and Na(+)/K(+)-ATPase activity were decreased. Conversely, ALA treatment reversed all these biochemical indices, as well as histopathological alterations induced by I/R. 5. In conclusion, these data suggest that ALA reverses I/R-induced oxidant responses and improves microscopic damage and renal function. Thus, it seems likely that ALA protects kidney tissues by inhibiting neutrophil infiltration, balancing the oxidant-anti-oxidant status and regulating the generation of inflammatory mediators.

Authors+Show Affiliations

School of Pharmacy, Department of Pharmacology, Marmara University, Istanbul, Turkey.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

17941895

Citation

Sehirli, Ozer, et al. "Alpha-lipoic Acid Protects Against Renal Ischaemia-reperfusion Injury in Rats." Clinical and Experimental Pharmacology & Physiology, vol. 35, no. 3, 2008, pp. 249-55.
Sehirli O, Sener E, Cetinel S, et al. Alpha-lipoic acid protects against renal ischaemia-reperfusion injury in rats. Clin Exp Pharmacol Physiol. 2008;35(3):249-55.
Sehirli, O., Sener, E., Cetinel, S., Yüksel, M., Gedik, N., & Sener, G. (2008). Alpha-lipoic acid protects against renal ischaemia-reperfusion injury in rats. Clinical and Experimental Pharmacology & Physiology, 35(3), 249-55.
Sehirli O, et al. Alpha-lipoic Acid Protects Against Renal Ischaemia-reperfusion Injury in Rats. Clin Exp Pharmacol Physiol. 2008;35(3):249-55. PubMed PMID: 17941895.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Alpha-lipoic acid protects against renal ischaemia-reperfusion injury in rats. AU - Sehirli,Ozer, AU - Sener,Emre, AU - Cetinel,Sule, AU - Yüksel,Meral, AU - Gedik,Nursal, AU - Sener,Göksel, Y1 - 2007/10/17/ PY - 2007/10/19/pubmed PY - 2008/4/30/medline PY - 2007/10/19/entrez SP - 249 EP - 55 JF - Clinical and experimental pharmacology & physiology JO - Clin Exp Pharmacol Physiol VL - 35 IS - 3 N2 - 1. Oxygen free radicals are important components involved in the pathophysiological processes observed during ischaemia-reperfusion (I/R). The present study was designed to assess the possible protective effect of alpha-lipoic acid (ALA) on renal I/R injury. 2. Wistar albino rats were unilaterally nephrectomized and subjected to 45 min renal pedicle occlusion followed by 24 h reperfusion. Saline or ALA (100 mg/kg, i.p.) was administered 15 min prior to ischaemia and immediately before the reperfusion period. At the end of 24 h, rats were decapitated and trunk blood was collected. Creatinine, blood urea nitrogen (BUN) and lactate dehydrogenase (LDH) activity were measured in serum samples, whereas tumour necrosis factor (TNF)-alpha, interleukin (IL)-1beta, IL-6, 8-hydroxydeoxyguanosine (8-OHdG) and total anti-oxidant capacity (AOC) were assayed in plasma samples. 3. Kidney samples were taken for the determination of tissue malondialdehyde (MDA) and glutathione (GSH) levels, as well as Na(+)/K(+)-ATPase and myeloperoxidase (MPO) activity. The formation of reactive oxygen species in renal tissue samples was monitored using a chemiluminescence (CL) technique with luminol and lucigenin probes. Oxidant-induced tissue fibrosis was determined by tissue collagen content and the extent of tissue injury was analysed microscopically. 4. Ischaemia-reperfusion caused a significant increases in blood creatinine, BUN, LDH, IL-1beta, IL-6, TNF-alpha and 8-OHdG, whereas AOC was decreased. In kidney samples from the I/R group, MDA, MPO, collagen and CL levels were found to be increased significantly; however, glutathione levels and Na(+)/K(+)-ATPase activity were decreased. Conversely, ALA treatment reversed all these biochemical indices, as well as histopathological alterations induced by I/R. 5. In conclusion, these data suggest that ALA reverses I/R-induced oxidant responses and improves microscopic damage and renal function. Thus, it seems likely that ALA protects kidney tissues by inhibiting neutrophil infiltration, balancing the oxidant-anti-oxidant status and regulating the generation of inflammatory mediators. SN - 1440-1681 UR - https://www.unboundmedicine.com/medline/citation/17941895/Alpha_lipoic_acid_protects_against_renal_ischaemia_reperfusion_injury_in_rats_ L2 - https://doi.org/10.1111/j.1440-1681.2007.04810.x DB - PRIME DP - Unbound Medicine ER -