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Membrane sodium-proton exchange and primary hypertension
D Rosskopf1, R Düsing, W Siffert
1Max-Planck-Institut für Biophysik, Frankfurt/Main, FRG.
Hypertension (Dallas, Tex. : 1979)
|May 1, 1993
Summary
Essential hypertension is linked to increased sodium-proton exchange activity, an ion transport abnormality found in blood cells and muscle. This enhanced activity may contribute to hypertension
Area of Science:
- Cardiovascular Physiology
- Renal Physiology
- Molecular Biology
Background:
- Essential hypertension is characterized by ion transport abnormalities.
- Sodium-proton exchange (NHE) plays a critical role in cellular ion homeostasis.
- Previous research suggests altered NHE activity in hypertensive individuals.
Purpose of the Study:
- To review the physiological properties and roles of the sodium-proton exchanger.
- To discuss the kinetic properties of NHE in essential hypertension.
- To explore the implications of enhanced NHE activity in hypertension pathogenesis.
Main Methods:
- Literature review of studies on sodium-proton exchange in hypertension.
- Analysis of ex vivo and in vivo measurements of antiport activity.
- Discussion of evidence supporting NHE as a cause or correlate of hypertensive changes.
Main Results:
- Enhanced sodium-proton exchange is a common ion transport abnormality in essential hypertension.
- Altered antiport activity is measurable in blood cells and skeletal muscle.
- Increased NHE activity is observed in a subgroup of hypertensive patients and is persistent.
Conclusions:
- Enhanced sodium-proton exchange is associated with structural alterations in resistance vessels and left ventricular hypertrophy.
- The persistent nature of increased NHE activity suggests it is not an epiphenomenon of hypertension.
- Understanding the mechanisms and implications of enhanced NHE activity is crucial for hypertension management.