Abstract
The involvement of the calcium and phosphoinositide intracellular regulatory systems in the molecular-cellular mechanisms of adaptation of the brain to hypoxia induced by transient anoxia were studied in slices of rat olfactory cortex. Anoxia lasting 2 min initiated the development of moderate but stable activation of intracellular regulatory systems during the reoxygenation period, with increases in binding of Ca2+ to intracellular hydrophobic domains and increases in the level of polyphosphoiositide metabolism. During this period, cells in the slices released neuromediator factors into the perfusion fluid; transfer of these to recipient slices induced similar changes in the activities of intracellular regulatory system components in the recipient slices. After anoxia lasting 10 min, NMDA-mediated pathogenic hyperactivity of the calcium and phosphoinositide systems developed. Preliminary moderate activation of these systems by transient anoxia or neuromodulator factors released by cells in response to transient anoxia prevented disruption of intracellular regulatory system activity induced by subsequent longer-lasting anoxia.
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Translated from Rossiiskii Fiziologicheskii Zhurnal imeni. I. M. Sechenova, Vol. 85, No. 1, pp. 139–148, January, 1999.
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Semenov, D.G., Tyul'kova, I.I., Samoilov, M.O. et al. Involvement of intracellular regulatory systems in the adaptive effects of transient anoxia in vitro. Neurosci Behav Physiol 30, 357–363 (2000). https://doi.org/10.1007/BF02471790
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DOI: https://doi.org/10.1007/BF02471790