Publication Date:
1988-06-24
Description:
Platelet-activating factor (PAF) is a naturally occurring phospholipid that serves as a critical mediator in diverse biological and pathophysiological processes. In this study of the interactions of PAF with neuronal cells, it was found that PAF increased the intracellular levels of free calcium ions in cells of the clones NG108-15 and PC12. The increase was dependent on extracellular calcium and was inhibited by the antagonistic PAF analog CV-3988 and by the calcium-influx blockers prenylamine and diltiazem. A functional consequence of this interaction was revealed by measuring a PAF-elicited, Ca2+-dependent secretion of adenosine triphosphate from PC12 cells. Exposure of NG108-15 cells for 3 to 4 days to low concentrations of PAF induced neuronal differentiation; higher concentrations were neurotoxic. Thus, by influencing Ca2+ fluxes, PAF may play a physiological role in neuronal development and a pathophysiological role in the degeneration that occurs when neurons are exposed to circulatory factors as a result of trauma, stroke, or spinal cord injury.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kornecki, E -- Ehrlich, Y H -- HL 32594/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1988 Jun 24;240(4860):1792-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychiatry, University of Vermont College of Medicine, Burlington 05405.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3381103" target="_blank"〉PubMed〈/a〉
Keywords:
Adrenergic Fibers/cytology
;
Animals
;
Benzodiazepines/pharmacology
;
Calcium/*physiology
;
Calcium Channel Blockers/pharmacology
;
Cell Line
;
Cell Survival/drug effects
;
Cholinergic Fibers/cytology
;
Neurons/cytology/*physiology
;
*Neurotoxins
;
Phospholipid Ethers/pharmacology
;
Platelet Activating Factor/*pharmacology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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