INVITRO ACTION OF INSULIN ON ERYTHROCYTE SODIUM-TRANSPORT MECHANISMS - ITS POSSIBLE ROLE IN THE PATHOGENESIS OF ARTERIAL-HYPERTENSION

The effects of insulin on sodium and potassium metabolism have been well known for many years; clinical observation and laboratory experience showed different results about the insulin effect on the sodium-potassium pump. Moreover, studies about the insulin effect on the sodium-potassium cotransport are not available. Therefore, the effects of insulin on Na+,K+ pump and Na+,K+ cotransport were evaluated. Results show that insulin inhibits Na+,K+ pump, while Na+,K+ cotransport is markedly activated. The possible link between pathogenesis of arterial hypertension in hyperinsulinemic subjects and present data is examined.