Renal tubular actions of ANF

Canadian Journal of Physiology and Pharmacology
M A KnepperY Terada

Abstract

Many of the earliest investigations of the renal effects of atrial natriuretic factor (ANF) pointed to the glomerulus as a major site of the peptide's action. More recently, there have been many reports showing various effects of ANF on renal tubular epithelia, including collecting ducts, thick ascending limbs of Henle's loop, thin limbs of Henle's loops, and proximal tubules. The purpose of this review is to summarize the evidence for renal tubular actions of ANF and analyze it from the perspective of the specialized functions of the individual nephron segments, addressing the question: can renal tubule effects of ANF play a significant role in the precise day-to-day regulation of renal NaCl and water excretion? Based on these considerations, we propose that long-term renal tubular action of ANF may be distinct from its short-term natriuretic effect. The short-term action of ANF to accelerate salt and water excretion may play a role in the overall response to acute volume overload. This action of ANF appears to be largely due to an ANF-mediated increase in glomerular filtration rate accompanied by a blunting of the tubuloglomerular feedback mechanism, perhaps with some contribution from ANF-mediated inhibition of fluid absorpt...Continue Reading

References

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Related Concepts

Inherited Factor II Deficiency
NPPA
Atrial Natriuretic Factor Precursors
Natriuretic Effect
Fluid Overload
Loop of Henle
Renal Tubule Structure
Allanson Pantzar McLeod Syndrome
Kidney
NPPA gene

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