In:
International Journal of Molecular Sciences, MDPI AG, Vol. 21, No. 11 ( 2020-05-31), p. 3957-
Abstract:
Arginine vasopressin (Avp) is a conserved pleiotropic hormone that is known to regulate both water reabsorption and ion balance; however, many of the mechanisms underlying its effects remain unclear. Here, we used zebrafish embryos to investigate how Avp modulates ion and acid–base homeostasis. After incubating embryos in double-deionized water for 24 h, avp mRNA expression levels were significantly upregulated. Knockdown of Avp protein expression by an antisense morpholino oligonucleotide (MO) reduced the expression of ionocyte-related genes and downregulated whole-body Cl− content and H+ secretion, while Na+ and Ca2+ levels were not affected. Incubation of Avp antagonist SR49059 also downregulated the mRNA expression of sodium chloride cotransporter 2b (ncc2b), which is a transporter responsible for Cl− uptake. Correspondingly, avp morphants showed lower NCC and H+-ATPase rich (HR) cell numbers, but Na+/K+-ATPase rich (NaR) cell numbers remained unchanged. avp MO also downregulated the numbers of foxi3a- and p63-expressing cells. Finally, the mRNA expression levels of calcitonin gene-related peptide (cgrp) and its receptor, calcitonin receptor-like 1 (crlr1), were downregulated in avp morphants, suggesting that Avp might affect Cgrp and Crlr1 for modulating Cl− balance. Together, our results reveal a molecular/cellular pathway through which Avp regulates ion and acid–base balance, providing new insights into its function.
Type of Medium:
Online Resource
ISSN:
1422-0067
DOI:
10.3390/ijms21113957
Language:
English
Publisher:
MDPI AG
Publication Date:
2020
detail.hit.zdb_id:
2019364-6
SSG:
12
