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- W2000937480 abstract "Abstract The effect of external pH (varying from 6.2–8.2) on the water and electrolyte contents of preparations of rabbit kidney cortex (slices and isolated tubules) was studied: 1. 1. In sodium saline, increasing external pH produced primarily a decrease in cell K + . High pH increased both the passive membrane permeability for 42 K + , and also the compartmentation of K + within the cells. 2. 2. Inhibition of the Na + pump by ouabain (0.5 mM) or absence of external Na + (lithium, Tris, and choline salines) did not abolish the control of cell volume at pH 6.2 and 7.2, whereas a marked cellular swelling at pH higher than 7.5 was found. The ouabain-insensitive (and Na + -independent) volume control at pH 6.2 was dependent on metabolism, since it was inhibited by 0.1 mM dinitrophenol and anaerobiosis. 3. 3. Involvement of Ca 2+ in the ouabain-insensitive volume control was demonstrated by showing that the absence of Ca 2+ , ouabain, or absence of Na + , produced a marked swelling at pH 7.2. This phenomenon was accompanied by increased extra-cellular space, due to a swelling of the basal tubular membrane. 4. 4. A correlation between cellular swelling and a decrease in cell ATP was presented. 5. 5. The results are compatible with the mechanochemical hypothesis for the ouabain-insensitive (and Na + -independent) control of cell volume. It is suggested that in this mechanism, cell (membrane) ATP and Ca 2+ are determinants of the physical properties of the membrane." @default.
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- W2000937480 date "1972-05-01" @default.
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- W2000937480 title "Effect of pH on the water and electrolyte content of renal cells" @default.
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- W2000937480 doi "https://doi.org/10.1016/0005-2736(72)90095-8" @default.
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