PUBLICATION
In Vivo Functional Assay in Fish Gills: Exploring Branchial Acid-Excreting Mechanisms in Zebrafish
- Authors
- Shih, S.W., Yan, J.J., Tsou, Y.L., Lu, S.W., Wang, M.C., Chou, M.Y., Hwang, P.P.
- ID
- ZDB-PUB-220424-20
- Date
- 2022
- Source
- International Journal of Molecular Sciences 23(8): (Journal)
- Registered Authors
- Chou, Ming-Yi, Hwang, Pung Pung
- Keywords
- H+ excretion, adult gills, in vivo functional assay, scanning ion-selective electrode technique, zebrafish
- MeSH Terms
-
- Acclimatization/physiology
- Acids/pharmacology
- Animals
- Gills*/metabolism
- Proton-Translocating ATPases/metabolism
- Sodium-Hydrogen Exchangers/metabolism
- Sodium-Potassium-Exchanging ATPase/metabolism
- Zebrafish*/metabolism
- PubMed
- 35457237 Full text @ Int. J. Mol. Sci.
Citation
Shih, S.W., Yan, J.J., Tsou, Y.L., Lu, S.W., Wang, M.C., Chou, M.Y., Hwang, P.P. (2022) In Vivo Functional Assay in Fish Gills: Exploring Branchial Acid-Excreting Mechanisms in Zebrafish. International Journal of Molecular Sciences. 23(8):.
Abstract
Molecular and physiological analyses in ionoregulatory organs (e.g., adult gills and embryonic skin) are essential for studying fish ion regulation. Recent progress in the molecular physiology of fish ion regulation was mostly obtained in embryonic skin; however, studies of ion regulation in adult gills are still elusive and limited because there are no direct methods for in vivo functional assays in the gills. The present study applied the scanning ion-selective electrode technique (SIET) in adult gills to investigate branchial H+-excreting functions in vivo. We removed the opercula from zebrafish and then performed long-term acid acclimation experiments. The results of Western blot and immunofluorescence showed that the protein expression of H+-ATPase (HA) and the number of H+-ATPase-rich ionocytes were increased under acidic situations. The SIET results proved that the H+ excretion capacity is indeed enhanced in the gills acclimated to acidic water. In addition, both HA and Na+/H+ exchanger (Nhe) inhibitors suppressed the branchial H+ excretion capacity, suggesting that H+ is excreted in association with HA and Nhe in zebrafish gills. These results demonstrate that SIET is effective for in vivo detection in fish gills, representing a breakthrough approach for studying the molecular physiology of fish ion regulation.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping