Efflux of inorganic phosphate from rat hepatocytes: lack of effect of insulin |
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Authors: | M Parkash P J Butterworth |
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Institution: | Department of Biochemistry, King's College London, UK. |
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Abstract: | Efflux of Pi from rat hepatocytes suspended in phosphate free-medium was studied by chemical assay of released Pi and by monitoring the loss in radioactivity of cells pre-labelled with 32P]-Pi. The release follows first-order kinetics fairly closely with a rate constant of 7 x 10(-3) min-1 approximately. Insulin at a concentration of 10(-8) M had no effect on the rate of Pi release and it is concluded therefore, that the insulin-stimulated accumulation of Pi described in the literature is the result of hormone action on Pi uptake by liver rather than on its release. |
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Keywords: | Phosphate liver hepatocytes insulin |
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