Antioxidants are required during the early critical period, but not later, for neuronal survival

Journal of Neuroscience Research
Seth W PerryHarris A Gelbard

Abstract

Methods for growing primary neuronal cultures rely on the inclusion of antioxidants in the culture medium, but no studies have determined precisely if or when antioxidants are required for neuronal survival, despite the significance this information would have for understanding neurodevelopment and studying oxidative stress. We show that cortical neurons grown in Neurobasal media with B27 supplement required antioxidants for only the first 24 hr post-explantation, after which the antioxidants could be removed permanently without noticeable loss of neuronal survival over the normal lifespan. Cortical cultures never exposed to antioxidants did not survive. These findings represent a novel method for substantially antioxidant-free neuronal culture, whereby antioxidants can be removed permanently from the cultures after only 1 day. This method may prove critical for studies of oxidative stress, because B27 antioxidants significantly diminished pro-oxidative effects of the excitatory neurotransmitter glutamate and hydrogen peroxide on cortical cultures, even if antioxidants were removed before the oxidizing treatment. Together, these findings suggest a brief window of high vulnerability to reactive oxygen species, and have important...Continue Reading

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Citations

Aug 6, 2008·Histochemistry and Cell Biology·Kazunori SangoHitoshi Kawano
Jun 22, 2011·Cellular and Molecular Neurobiology·Zenji KawakamiYoshio Kase
Jan 4, 2013·Cytotechnology·Shigang ChengChuanguo Xiao
Feb 16, 2010·Journal of Molecular Neuroscience : MN·Jeong Seon YoonYoung Choong Kim
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