PMID- 23498342 OWN - NLM STAT- MEDLINE DCOM- 20131001 LR - 20131121 IS - 1095-8673 (Electronic) IS - 0022-4804 (Linking) VI - 183 IP - 2 DP - 2013 Aug TI - Effect of modulating the allosteric sites of N-methyl-D-aspartate receptors in ischemia-reperfusion induced acute kidney injury. PG - 668-77 LID - S0022-4804(13)00064-4 [pii] LID - 10.1016/j.jss.2013.01.040 [doi] AB - BACKGROUND: Acute kidney injury (AKI) is one of the major health problems in developed as well as developing countries. The literature regarding the role of N-methyl-D-aspartate receptors (NMDAR) and the impact of the modulation of its allosteric sites on renal function is inadequate. The present study investigated the effect of modulating allosteric sites of NMDAR in ischemia-reperfusion-induced AKI. MATERIALS AND METHODS: We subjected rats to bilateral renal ischemia for 40 min followed by reperfusion for 24 h to induce AKI. We measured blood urea nitrogen, serum creatinine, uric acid, and lactate dehydrogenase to assess kidney injury. We assayed the thiobarbituric acid-reactive substances, reduced glutathione level, and myeloperoxidase and catalase activity to assess oxidative stress in renal tissue, and used hematoxylin-eosin staining to observe histopathologic changes. RESULTS: Ischemia-reperfusion induced AKI, as demonstrated by an increase in serum parameters, oxidative stress and histopathologic changes in renal tissue. The NMDA agonist glutamic acid and polyamine binding site agonist spermidine significantly aggravated oxidative stress and ischemia-reperfusion-induced AKI. Various NMDA receptor antagonists, including glycine binding site inhibitor kynurenic acid, polyamine binding site inhibitor ketamine, and channel blocking agent magnesium sulfate, attenuated ischemia-reperfusion-induced AKI and significantly reduced oxidative stress, which suggests a role for NMDA receptors and the importance of regulating its allosteric sites in AKI. CONCLUSIONS: Acute kidney injury is associated with the activation of NMDA receptors, as well as significant oxidative stress. The antagonism of various allosteric sites of NMDA receptors affords significant benefit against ischemia-reperfusion-induced AKI. CI - Copyright (c) 2013 Elsevier Inc. All rights reserved. FAU - Pundir, Mandeep AU - Pundir M AD - Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, India. FAU - Arora, Shiyana AU - Arora S FAU - Kaur, Tajpreet AU - Kaur T FAU - Singh, Randhir AU - Singh R FAU - Singh, Amrit Pal AU - Singh AP LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130210 PL - United States TA - J Surg Res JT - The Journal of surgical research JID - 0376340 RN - 0 (Receptors, N-Methyl-D-Aspartate) RN - 0 (Thiobarbituric Acid Reactive Substances) RN - 11062-77-4 (Superoxides) RN - 3KX376GY7L (Glutamic Acid) RN - 690G0D6V8H (Ketamine) RN - 7487-88-9 (Magnesium Sulfate) RN - EC 1.11.1.6 (Catalase) RN - GAN16C9B8O (Glutathione) RN - H030S2S85J (Kynurenic Acid) RN - U87FK77H25 (Spermidine) SB - IM MH - Acute Kidney Injury/*etiology/metabolism/*physiopathology MH - Allosteric Site/drug effects/*physiology MH - Animals MH - Catalase/metabolism MH - Glutamic Acid/pharmacology MH - Glutathione/metabolism MH - Ketamine/pharmacology MH - Kynurenic Acid/pharmacology MH - Magnesium Sulfate/pharmacology MH - Male MH - Models, Animal MH - Oxidative Stress/drug effects MH - Rats MH - Rats, Wistar MH - Receptors, N-Methyl-D-Aspartate/drug effects/*physiology MH - Reperfusion Injury/*complications MH - Spermidine/pharmacology MH - Superoxides/metabolism MH - Thiobarbituric Acid Reactive Substances/metabolism OTO - NOTNLM OT - Allosteric modulation OT - Ischemia-reperfusion OT - Kidney injury OT - NMDA EDAT- 2013/03/19 06:00 MHDA- 2013/10/18 06:00 CRDT- 2013/03/19 06:00 PHST- 2012/09/20 00:00 [received] PHST- 2012/12/28 00:00 [revised] PHST- 2013/01/18 00:00 [accepted] PHST- 2013/03/19 06:00 [entrez] PHST- 2013/03/19 06:00 [pubmed] PHST- 2013/10/18 06:00 [medline] AID - S0022-4804(13)00064-4 [pii] AID - 10.1016/j.jss.2013.01.040 [doi] PST - ppublish SO - J Surg Res. 2013 Aug;183(2):668-77. doi: 10.1016/j.jss.2013.01.040. Epub 2013 Feb 10.