Abstract
We examined the effect of angiotensin on Na+ and K+ transport by cultures of aortic smooth muscle and brain microvessel cells. Angiotensin II (AII) and angiotensin III (AIII) stimulated net Na+ uptake, which was assayed in the presence of ouabain to block Na+ efflux via the Na+ -K+ pump. The combination of saturating concentrations of AII and AIII produced no greater stimulation of net Na+ uptake than either angiotensin by itself. AII also stimulated ouabain-sensitive 86Rb+ uptake by cultured aortic smooth muscle and brain microvessel cells. AII was not as effective as monensin, a Na+ ionophore, in stimulating the Na+ -K+ pump. In the presence of monensin, AII had no effect on ouabain-sensitive 86Rb+ uptake. These data are consistent with previous observations suggesting that AII stimulates the Na+ -K+ pump by supplying it with more of its rate-limiting substrate, Na+.
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© 1984 Plenum Press, New York
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Brock, T.A., Smith, J.B. (1984). Angiotensin Receptors and the Control of Na+ and K+ Transport in Cultured Aortic Smooth Muscle and Brain Microvessel Cells. In: Acton, R.T., Daniel Lynn, J. (eds) Eukaryotic Cell Cultures. Advances in Experimental Medicine and Biology, vol 172. Springer, New York, NY. https://doi.org/10.1007/978-1-4615-9376-8_25
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DOI: https://doi.org/10.1007/978-1-4615-9376-8_25
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