Abstract
Zinc is an essential trace element necessary to life. This metal may exert some of its physiological effects by acting directly on cellular membranes, either by altering permeability or by modulating the activity of membrane-bound enzymes. On the other hand, calcium is an essential element in a wide variety of cellular activities. The aim of the present work was to study a possible interaction between zinc and calcium on intestinal transport ofd-galactose in jejunum of rabbit in vitro. In media with Ca2+, when ZnCl2 was present at 0.5 or 1 mM, zinc was found to reduce thed-galactose absorption significantly. In Ca2+-free media, where CaCl2 was omitted and replaced isotonically with choline chloride, the sugar transport was not modified by zinc. Verapamil at 10−6 M (blocking mainly Ca2+ transport) did not modify the inhibitory effect of zinc ond-galactose transport. When 10−6 M of A 23187 (Ca2+-specific ionophore) was added with/without Ca2+ to the media, ZnCl2 produced no change in sugar transport. These results could suggest a possible interaction of calcium and zinc for the same chemical groups of membrane, which could affect the intestinal absorption of sugars.
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Rodríguez-Yoldi, MC., Mesonero, JE. & Rodríguez-Yoldi, MJ. Study of interaction between calcium and zinc ond-galactose intestinal transport. Biol Trace Elem Res 50, 1–11 (1995). https://doi.org/10.1007/BF02789144
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DOI: https://doi.org/10.1007/BF02789144