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Nitric oxide (NO) is a diffusible messenger involved in several patho-physiological processes including immune-mediated cytotoxicity and neural cell killing. NO or the products of its redox chemistry can cause DNA damage and activate subsequent lethal reactions including energy depletion and cell necrosis. However, regardless of whether it is endogenously produced in response to cytokines, or generated...
Excessive nitric oxide (NO) has been implicated in neurotoxicity after stresses such as ischemia. NO toxicity is generally thought to be mediated by the DNA damage-p53 pathway or mitochondrial dysfunction. We investigated the mechanism of NO toxicity by using murine microglial MG5 cells established from p53-deficient mice. When MG5 cells were exposed to bacterial lipopolysaccharide plus interferon-γ,...
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