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Autosomal dominant polycystic kidney disease is associated with central and nephrogenic defects in osmoregulation.

Abstract：

:Autosomal dominant polycystic kidney disease (ADPKD) is associated with a urine-concentrating defect attributed to renal cystic changes. As PKD genes are expressed in the brain, altered central release of arginine vasopressin could also play a role. In order to help determine this we measured central and nephrogenic components of osmoregulation in 10 adults and 10 children with ADPKD, all with normal renal function, and compared them to 20 age- and gender-matched controls. Overnight water deprivation caused a lower rise in urine osmolality in the patients with ADPKD than controls, reflecting an impaired release of vasopressin and a peripheral defect in the patients. The reactivity of plasma vasopressin to water deprivation, as found in controls, was blunted in the patients with the latter showing lower urine osmolality for the same range of plasma vasopressin. The maximal urine osmolality correlated negatively with total kidney volume. Defective osmoregulation was confirmed in the children with ADPKD but was unrelated to number of renal cysts or kidney size. Thus, patients with ADPKD have an early defect in osmoregulation, with a blunted release of arginine vasopressin. This reflects expression of polycystins in hypothalamic nuclei that synthesize vasopressin, and this should be considered when evaluating treatments targeting the vasopressin pathway in ADPKD.

journal_name

Kidney Int

journal_title

Kidney international

authors

Ho TA,Godefroid N,Gruzon D,Haymann JP,Maréchal C,Wang X,Serra A,Pirson Y,Devuyst O

doi

10.1038/ki.2012.225

subject

Has Abstract

pub_date

2012-11-01 00:00:00

pages

1121-9

issue

10

eissn

0085-2538

issn

1523-1755

pii

S0085-2538(15)55446-X

journal_volume

82

pub_type

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