Tubuloglomerular feedback mechanisms in nephron segments beyond the macula densa.

Abstract:

PURPOSE OF REVIEW:To summarize recent evidence regarding the role of distal nephron segments other than the macula densa in sensing the tubular environment and transmitting this signal to the adjacent vasculature. RECENT FINDINGS:In addition to the classical contact site between the macula densa plaque and the afferent arteriole, there is accumulating evidence suggesting a functional association between the distal nephron and the vasculature at three distinct additional sites: at the terminal cortical thick ascending limb, at the early distal tubule and also at the connecting tubule segment. The epithelial cells around the macula densa also sense and respond to changes in tubular flow and salt content and may transmit this signal to the adjacent afferent arteriole. SUMMARY:There are multiple sites of anatomical and functional contact between the distal nephron and the vasculature supplying the glomerulus, and these may contribute to the regulation of glomerular filtration rate and renal hemodynamics.

authors

Komlosi P,Bell PD,Zhang ZR

doi

10.1097/MNH.0b013e32831daf54

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

57-62

issue

1

eissn

1062-4821

issn

1473-6543

pii

00041552-200901000-00011

journal_volume

18

pub_type

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