The calmodulin antagonist calmidazolium stimulates release of nitric oxide in neuroblastoma N1E-115 cells

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Abstract

Effects of the calmodulin inhibitor calmidazolium on stimulation of nitric oxide (NO) release were investigated in neuroblastoma N1E-115 cells. NO release was determined indirectly by measuring cyclic GMP formation. Instead of the expected decrease in NO generation based on the calmodulin dependence of neuronal NO synthase, calmidazoline paradoxically increased cyclic GMP formation. Maximal activation occurred at 3 min and the effects were concentration dependent. This calmidazolium-stimulated NO release was markedly blocked by hemoglobin and AT-monomethyl-L-arginine.

Original languageEnglish (US)
Pages (from-to)198-200
Number of pages3
JournalNeuroreport
Volume4
Issue number2
DOIs
StatePublished - Feb 1993

Keywords

  • Calmidazolium
  • Calmodulin antagonists
  • Cyclic GMP
  • N1E-115 cells
  • Nitric oxide

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