Neural control of renal function in health and disease

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Abstract
The renal sympathetic innervation of the kidney exerts significant effects on multiple aspects of renal function, including renal haemodynamics, tubular sodium and water reabsorption and renin secretion. These effects constitute an important control system which is important in the physiological regulation of arterial pressure and total body fluid and sodium homeostasis. Abnormalities in this regulatory mechanism have pathophysiological consequences and are manifest in clinically relevant human disease states. Decreased renal sympathetic nerve activity results in impaired renin secretion, the inability to conserve sodium normally and an attenuated ability to dispose of both acute and chronic sodium loads. Increased renal sympathetic nerve activity contributes significantly to the excess renal sodium retention and related renal abnormalities observed in both hypertension and oedema forming conditions, such as cardiac failure, cirrhosis and nephrotic syndrome.

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