PUBLICATION
Expression and function of ATP-dependent potassium channels in zebrafish islet β-cells
- Authors
- Emfinger, C.H., Welscher, A., Yan, Z., Wang, Y., Conway, H., Moss, J.B., Moss, L.G., Remedi, M.S., Nichols, C.G.
- ID
- ZDB-PUB-170408-5
- Date
- 2017
- Source
- Royal Society open science 4: 160808 (Journal)
- Registered Authors
- Moss, Jennifer Barnett, Moss, Larry Gene
- Keywords
- KATP, ion channels, metabolism, pancreas, zebrafish
- MeSH Terms
- none
- PubMed
- 28386438 Full text @ R Soc Open Sci
Citation
Emfinger, C.H., Welscher, A., Yan, Z., Wang, Y., Conway, H., Moss, J.B., Moss, L.G., Remedi, M.S., Nichols, C.G. (2017) Expression and function of ATP-dependent potassium channels in zebrafish islet β-cells. Royal Society open science. 4:160808.
Abstract
ATP-sensitive potassium channels (KATP channels) are critical nutrient sensors in many mammalian tissues. In the pancreas, KATP channels are essential for coupling glucose metabolism to insulin secretion. While orthologous genes for many components of metabolism-secretion coupling in mammals are present in lower vertebrates, their expression, functionality and ultimate impact on body glucose homeostasis are unclear. In this paper, we demonstrate that zebrafish islet β-cells express functional KATP channels of similar subunit composition, structure and metabolic sensitivity to their mammalian counterparts. We further show that pharmacological activation of native zebrafish KATP using diazoxide, a specific KATP channel opener, is sufficient to disturb glucose tolerance in adult zebrafish. That β-cell KATP channel expression and function are conserved between zebrafish and mammals illustrates the evolutionary conservation of islet metabolic sensing from fish to humans, and lends relevance to the use of zebrafish to model islet glucose sensing and diseases of membrane excitability such as neonatal diabetes.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping