β-amyloid 25-35 activates nitric oxide synthase in a neuronal clone

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Abstract

The role played by the β-amyloid protein in the neuropathology which accompanies Alzheimer’s disease remains unclear. In an effort to unravel some of the cellular actions of β-amyloid, we investigated its effects on nitric oxide (NO) release in cultured neuron. The putative neurotoxic fragment 25-35 of β-amyloid stimulated release of NO in a neuronal cell line, as measured by an increase in cyclic GMP formation which is attenuated by NO synthase inhibitors and NO scavengers. These results suggest that NO might mediate intercellular communication effected by β-amyloid. Our results provide the first piece of evidence that β-amyloid directly activates a putative neurotoxic second messenger transduction mechanism. These findings might be of potential value in understanding the molecular basis of Alzheimer’s disease pathology and in targeting new effective therapeutic approaches.

Original languageEnglish (US)
Pages (from-to)760-762
Number of pages3
JournalNeuroreport
Volume4
Issue number6
DOIs
StatePublished - Jun 1993

Keywords

  • N1e-115 cells
  • Nitric oxide
  • β-Amyloid

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