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Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
Published on: October 16, 2013
7-Nitro indazole enhances methohexital anesthesia
1Brain Research Institute, University of Bremen, P.O.B. 330440, 28334 Bremen, Germany. motzko@zfn.uni-bremen.de
Abstract:
7-nitro indazole, a selective inhibitor of the neuronal nitric oxide (NO) synthase dose-dependently prolongs the duration of methohexital narcosis in the rat. This effect can be antagonized stereoselectively by the NO-synthase substrate l-arginine (l-Arg). The results support the assumption that the potentiation of the anesthetic state by NO-synthase inhibitors is due to a specific effect on brain NO-synthase and a disruption of synaptic NO signalling pathways. These results are also in accordance with predictions that follow from recent hypotheses proposing that a modification of the NMDA receptor function is the final common pathway of anesthetic action.
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