Abstract
Molecular processes regulating cholinergic functions play an important role in the control of respiration under neonatal hypoxia. The present study evaluates neonatal hypoxic insult-mediated cholinergic alterations and the protective role of glucose, oxygen and epinephrine resuscitation. The changes in total muscarinic, muscarinic M1, M2, M3 receptors and the enzymes involved in acetylcholine metabolism––cholineacetyl transferase and acetylcholine easterase in the brain stem were analyzed. Hypoxic stress decreased total muscarinic receptors along with a reduction in muscarinic M1, M2 and M3 receptor genes in the brain stem. The reduction in acetylcholine metabolism is indicated by the down regulated cholineacetyl transferase and up regulated acetylcholine easterase expression. These cholinergic disturbances in the brain stem were reversed by glucose resuscitation to hypoxic neonates. The adverse effects of immediate oxygenation and epinephrine administration were also reported. This has immense clinical significance in establishing a proper resuscitation for the management of neonatal hypoxia.
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Acknowledgments
This work was supported by the research grants from DBT, DST, ICMR, Govt. of India and KSCSTE, Government of Kerala to Dr. C. S. Paulose. Anju T R thanks Council of Scientific and Industrial Research for Senior Research Fellowship.
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Anju, T.R., Naijil, G., Shilpa, J. et al. Neonatal hypoxic insult-mediated cholinergic disturbances in the brain stem: effect of glucose, oxygen and epinephrine resuscitation. Neurol Sci 34, 287–296 (2013). https://doi.org/10.1007/s10072-012-0989-x
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DOI: https://doi.org/10.1007/s10072-012-0989-x