Release of Ethanolamine, but Not of Serine or Choline, in Rat Pontine Nuclei on Stimulation of Afferents from the Cortex, In Vivo
- 1 May 1986
- journal article
- research article
- Published by Wiley in Journal of Neurochemistry
- Vol. 46 (5), 1338-1343
- https://doi.org/10.1111/j.1471-4159.1986.tb01744.x
Abstract
Release of ethanolamine, serine, and choline in rat pontine nuclei on electrical stimulation of afferents from the cortex was investigated using in vivo push-pull cannula techniques. Ethanolamine was determined by using gas chromatographic techniques; serine was measured with a HPLC system; and choline was assayed with a luminescence method. Resting elution rates of ethanolamine, serine, and choline were 50.8 .+-. 8.4, 34.8 .+-. 12.6, and 1.16 .+-. 0.20 pmol/5 min, respectively. Stimulation of the cortico-pontine tract evoked a highly significant 3.4-fold increase in release of ethanolamine, whereas serine and choline release was unaffected. Reacitons in membrane phospholipids are most likely involved in the stimulation-dependent release of ethanolamine and special consideration was given to base-exchange reactions. Alternatively, a release from intracellular, possibly synaptic stores cannot be excluded.Keywords
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