NG-nitro-L-arginine methyl ester (L-NAME) prevents tachyphylaxis to local anesthetics in a dose-dependent manner

Anesthesia and Analgesia
R T WilderC B Berde

Abstract

A model of local anesthetic tachyphylaxis was developed in our group previously using repeated sciatic nerve blocks in rats. In this model, thermal hyperalgesia accelerated tachyphylaxis, and the noncompetitive N-methyl-D-aspartic acid (NMDA) receptor antagonist, MK-801, prevented both hyperalgesia and tachyphylaxis. Nitric oxide is thought to be a second messenger for NMDA pathways in the spinal cord, and appears to be involved in spinal mechanisms of hyperalgesia. We hypothesized that nitric oxide synthase inhibitors would also inhibit the development of tachyphylaxis. Repeated rat sciatic nerve blocks were placed by percutaneous injection of 2-chloroprocaine. Block duration was tested by measuring hot-plate latency at 56 degrees C. Two hours before the first nerve block, rats received intraperitoneal injections with saline or one of six concentrations of NG-nitro-L-arginine methyl ester (L-NAME) in a randomized, blinded pattern. Control rats developed tachyphylaxis as seen previously: the duration of the third block was 30% that of the first. L-NAME inhibited the development of tachyphylaxis in a dose-dependent manner; tachyphylaxis was inhibited by 50% using L-NAME at 0.2mg/kg and completely abolished by 50 mg/kg. Nitric ox...Continue Reading

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Citations

Jan 12, 2005·Journal of Huazhong University of Science and Technology. Medical Sciences = Hua Zhong Ke Ji Da Xue Xue Bao. Yi Xue Ying De Wen Ban = Huazhong Keji Daxue Xuebao. Yixue Yingdewen Ban·Chen WangC B Berde
Apr 25, 2000·Journal of Clinical Anesthesia·F R ManekshaP J Poppers
Dec 23, 2011·Anesthesiology Research and Practice·Edward A Shipton
Sep 12, 2015·Acta Anaesthesiologica Scandinavica·U E Kongsgaard, M U Werner
Nov 26, 2015·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Elodie SchaefferAurélie Birenbaum
Sep 4, 2015·Journal of Anaesthesiology, Clinical Pharmacology·Prasanna VadhananS Adinarayanan
Jan 27, 2004·Anesthesia and Analgesia·S MercadanteE Arcuri
Feb 25, 2005·Anesthesia and Analgesia·Igor KissinEdwin L Bradley
Dec 13, 2007·Anesthesiology·Noboru TodaYoshio Hatano

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