Abstract
Abstract: [3H]Acetylcholine efflux and Na+‐K+ ATPase ion pump activity were measured concomitantly in rat cortical synaptosomes. Ouabain (500 μM), strophanthidin (500 μM). and parachloromercuribenzene sulfonate (500 μM) each inhibited ouabain‐sensitive 86Rb uptake and elevated [3H]acetylcholine release independently of the external calcium concentration. Veratridine (10 μM), electrical field stimulation (60 V, 60 Hz, 5‐ms pulse duration), or the calcium ionophore A23187 (10μg/ml) also inhibited ouabain‐sensitive 86Rb uptake and released [3H]acetylcholine, but via a calcium‐dependent process. Veratridine‐induced [3H]acetylcholine release and ion pump inhibition were correlated over a wide range of drug concentrations and both effects were blocked by pre‐treatment with tetrodotoxin (1 μM). The rate of [3H]acetyl‐choline efflux from superfused synaptosomes was increased within 15 s of exposure to ouabain, strophanthidin, veratridine, A23187, or field stimulation, while ouabain‐sensitive 86Rb uptake was significantly decreased within a similar interval. These results suggest that [3H]acetylcholine release is due at least in part to inhibition of Na+‐K+ ATPase.
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Dates
Type | When |
---|---|
Created | 18 years, 11 months ago (Oct. 5, 2006, 6:56 a.m.) |
Deposited | 1 year, 10 months ago (Nov. 4, 2023, 2:35 p.m.) |
Indexed | 2 days, 19 hours ago (Sept. 4, 2025, 10:24 a.m.) |
Issued | 44 years, 7 months ago (Feb. 1, 1981) |
Published | 44 years, 7 months ago (Feb. 1, 1981) |
Published Online | 18 years, 11 months ago (Oct. 5, 2006) |
Published Print | 44 years, 7 months ago (Feb. 1, 1981) |
@article{Meyer_1981, title={Correlations Between Na+‐K+ ATPase Activity and Acetylcholine Release in Rat Cortical Synaptosomes}, volume={36}, ISSN={1471-4159}, url={http://dx.doi.org/10.1111/j.1471-4159.1981.tb01616.x}, DOI={10.1111/j.1471-4159.1981.tb01616.x}, number={2}, journal={Journal of Neurochemistry}, publisher={Wiley}, author={Meyer, E. M. and Cooper, J. R.}, year={1981}, month=feb, pages={467–475} }