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  • Title: Phosphatidic acid metabolism, calcium ions and transmitter release from electrically stimulated synaptosomes.
    Author: Hawthorne JN, Bleasdale JE.
    Journal: Mol Cell Biochem; 1975 Aug 30; 8(2):83-7. PubMed ID: 170506.
    Abstract:
    Synaptosomes isolated from guinea pig brain cortex were stimulated electrically in a medium containing [32P]-orthophosphate. The electrical stimulation caused increased labelling of phosphatidic acid in a synaptic vesicle fraction prepared by osmotic shock of the incubated synaptosomes. Electrical stimulation also provokes transmitter release from the synaptosomes. Both increased phosphatidate labelling and transmitter release required calcium ions in the medium. The effects are discussed in relation to earlier work with acetylcholine and the possible involvement of membrane phosphatidic acid in transmitter release by exocytosis.
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