Abstract
Ten years ago, we initiated studies of the genetic variations of Na+ transport systems as an approach to the genetics of hypertension. One of these biochemical phenotypes, Na+/Li+ exchange (Na/Li EXC), is elevated in a sizable proportion of the essentially hypertensive population. Furthermore, the abnormalities observed have been shown by family studies to be largely genetically determined [1,2,3]. In pursuing the question of what significance these abnormalities might have in the pathophysiology of hypertension, we found that Na+/Li+ countertransport has many features in common with the Na+/H+ exchanges (Na/H EXC). The Na+ exchanges system is expressed not only in red blood cells (rbc), but in three target tissues of the hypertensive process: vascular smooth muscle (VSM) [4,5], kidney epithelial [6] and adrenal glomerulosa cells [7]. In these cells Na/H EXC regulates cell pH and volume, and it is modulated by vasocontrictor and growth factor agonist which mobilize Ca2+ [4,8,10].
Supported by grants from the National Institute of Health, NHLBI 35664 and by a specialized Center of Research Award in Hypertension (1P50HP-36568).
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© 1991 Springer-Verlag Berlin • Heidelberg
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Canessa, M. (1991). Regulation of the Na+/H+ Exchanger in Essential Hypertension: Functional and Genetic Abnormalities. In: Bruschi, G., Borghetti, A. (eds) Cellular Aspects of Hypertension. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-00983-3_18
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DOI: https://doi.org/10.1007/978-3-662-00983-3_18
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