PUBLICATION
How the expression of green fluorescent protein and human cardiac actin in the heart influences cardiac function and aerobic performance in zebrafish Danio rerio
- Authors
- Avey, S.R., Ojehomon, M., Dawson, J.F., Gillis, T.E.
- ID
- ZDB-PUB-171204-41
- Date
- 2017
- Source
- Journal of Fish Biology 92(1): 177-189 (Journal)
- Registered Authors
- Keywords
- O2 consumption, cost of transport, critical swimming speed, heart rate, transgenic protein expression
- MeSH Terms
-
- Actins/analysis
- Actins/physiology*
- Animals
- Animals, Genetically Modified/physiology
- Green Fluorescent Proteins/analysis
- Green Fluorescent Proteins/metabolism
- Heart/physiology*
- Heart Rate
- Humans
- Myocardium/metabolism
- Oxygen/metabolism
- Swimming/physiology
- Zebrafish/genetics
- Zebrafish/physiology*
- PubMed
- 29194605 Full text @ J. Fish Biol.
Citation
Avey, S.R., Ojehomon, M., Dawson, J.F., Gillis, T.E. (2017) How the expression of green fluorescent protein and human cardiac actin in the heart influences cardiac function and aerobic performance in zebrafish Danio rerio. Journal of Fish Biology. 92(1):177-189.
Abstract
The present study examined how the expression of enhanced green fluorescent protein (eGFP) and human cardiac actin (ACTC) in zebrafish Danio rerio influences embryonic heart rate (RH ) and the swim performance and metabolic rate of adult fish. Experiments with the adults involved determining the critical swimming speed (Ucrit , the highest speed sustainable and measure of aerobic capacity) while measuring oxygen consumption. Two different transgenic D. rerio lines were examined: one expressed eGFP in the heart (tg(cmlc:egfp)), while the second expressed ACTC in the heart and eGFP throughout the body (tg(cmlc:actc,ba:egfp)). It was found that RH was significantly lower in the tg(cmlc:actc,ba:egfp) embryos 4 days post-fertilization compared to wild-type (WT) and tg(cmlc:egfp). The swim experiments demonstrated that there was no significant difference in Ucrit between the transgenic lines and the wild-type fish, but metabolic rate and cost of transport (oxygen used to travel a set distance) was nearly two-fold higher in the tg(cmlc:actc,ba:egfp) fish compared to WT at their respective Ucrit . These results suggest that the expression of ACTC in the D. rerio heart and the expression of eGFP throughout the animal, alters cardiac function in the embryo and reduces the aerobic efficiency of the animal at high levels of activity.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping