PUBLICATION
In vivo and in vitro assessment of cardiac {beta}-adrenergic receptors in larval zebrafish (Danio rerio)
- Authors
- Steele, S.L., Yang, X., Debiais-Thibaud, M., Schwerte, T., Pelster, B., Ekker, M., Tiberi, M., Perry, S.F.
- ID
- ZDB-PUB-110517-4
- Date
- 2011
- Source
- The Journal of experimental biology 214(9): 1445-1457 (Journal)
- Registered Authors
- Debiais-Thibaud, Mélanie, Ekker, Marc, Pelster, Bernd, Perry, Steve F., Schwerte, Thorsten
- Keywords
- morpholino, adenylyl cyclase, cardiac output, binding affinity, HEK293 cells
- MeSH Terms
-
- Aging/drug effects
- Aging/genetics
- Animals
- Cell Membrane/drug effects
- Cell Membrane/metabolism
- GTP-Binding Protein alpha Subunits, Gs/metabolism
- Gene Expression Profiling
- Gene Expression Regulation, Developmental/drug effects
- HEK293 Cells
- Humans
- In Situ Hybridization
- Larva/metabolism
- Ligands
- Luminescent Proteins/metabolism
- Myocardium/metabolism*
- Oligonucleotides, Antisense/pharmacology
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptors, Adrenergic, beta/genetics
- Receptors, Adrenergic, beta/metabolism*
- Stroke Volume/drug effects
- Stroke Volume/physiology
- Zebrafish/genetics
- Zebrafish/growth & development*
- Zebrafish/metabolism*
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism*
- PubMed
- 21490253 Full text @ J. Exp. Biol.
Citation
Steele, S.L., Yang, X., Debiais-Thibaud, M., Schwerte, T., Pelster, B., Ekker, M., Tiberi, M., Perry, S.F. (2011) In vivo and in vitro assessment of cardiac {beta}-adrenergic receptors in larval zebrafish (Danio rerio). The Journal of experimental biology. 214(9):1445-1457.
Abstract
β-Adrenergic receptors (βARs) are crucial for maintaining the rate and force of cardiac muscle contraction in vertebrates.
Zebrafish (Danio rerio) have one β1AR gene and two β2AR genes (β2aAR and β2bAR). We examined the roles of these receptors in larval zebrafish in vivo by assessing the impact of translational gene knockdown on cardiac function. Zebrafish larvae lacking β1AR expression by
morpholino knockdown displayed lower heart rates than control fish, whereas larvae deficient in both β2aAR and β2bAR expression
exhibited significantly higher heart rates than controls. These results suggested a potential inhibitory role for one or both
β2AR genes. By using cultured HEK293 cells transfected with zebrafish βARs, we demonstrated that stimulation with adrenaline
or procaterol (a β2AR agonist) resulted in an increase in intracellular cAMP levels in cells expressing any of the three zebrafish
βARs. In comparison with its human βAR counterpart, zebrafish β2aAR expressed in HEK293 cells appeared to exhibit a unique
binding affinity profile for adrenergic ligands. Specifically, zebrafish β2aAR had a high binding affinity for phenylephrine,
a classical α-adrenergic receptor agonist. The zebrafish receptors also had distinct ligand binding affinities for adrenergic
agonists when compared with human βARs in culture, with zebrafish β2aAR being distinct from human β2AR and zebrafish β2bAR.
Overall, this study provides insight into the function and evolution of both fish and mammalian β-adrenergic receptors.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping