The basal function of teleost prolactin as a key regulator on ion uptake identified with zebrafish knockout models.

Abstract:

:Prolactin (PRL) is an anterior pituitary hormone with a broad range of functions. Its ability to stimulate lactogenesis, maternal behavior, growth and development, osmoregulation, and epithelial ion transport has been reported in many vertebrates. In our present study, we have targeted the zebrafish prl locus via transcription activator-like effector nucleases (TALENs). Two independent targeted mutant lines with premature termination of the putative sequence of PRL peptides were generated. All prl-deficient zebrafish progeny died at 6-16 days post-fertilization stage (dpf) in egg water. However, the prl-deficient larvae thrived and survived through adulthood in brackish water (5175 mg/L ocean salts), without obvious defects in somatic growth or reproduction. When raised in egg water, the expression levels of certain key Na(+)/Cl(-) cotransporters in the gills and Na(+)/K(+)-ATPase subunits, Na(+)/H(+) exchangers and Na(+)/Cl(-) transporters in the pronephros of prl-deficient larvae were down-regulated at 5 dpf, which caused Na(+)/K(+)/Cl(-) uptake defects in the mutant fish at 6 dpf. Our present results demonstrate that the primary function of zebrafish prl is osmoregulation via governing the uptake and homeostasis of Na(+), K(+) and Cl(-). Our study provides valuable evidence to understand the mechanisms of PRL function better through both phylogenetic and physiological perspectives.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Shu Y,Lou Q,Dai Z,Dai X,He J,Hu W,Yin Z

doi

10.1038/srep18597

subject

Has Abstract

pub_date

2016-01-04 00:00:00

pages

18597

issn

2045-2322

pii

srep18597

journal_volume

6

pub_type

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