PUBLICATION
Roles of selenoprotein antioxidant protection in zebrafish, Danio rerio, subjected to dietary oxidative stress
- Authors
- Betancor, M.B., Almaida-Pagán, P.F., Sprague, M., Hernández, A., Tocher, D.R.
- ID
- ZDB-PUB-150311-13
- Date
- 2015
- Source
- Fish physiology and biochemistry 41(3): 705-20 (Journal)
- Registered Authors
- Keywords
- none
- MeSH Terms
-
- Animals
- Antioxidants/administration & dosage
- Antioxidants/pharmacology*
- DNA Primers/genetics
- Dietary Supplements
- Docosahexaenoic Acids/administration & dosage
- Fatty Acids/metabolism
- Gene Expression Profiling
- Gene Expression Regulation/drug effects*
- Liver/metabolism
- Muscle, Skeletal/metabolism
- Oxidative Stress/drug effects*
- Selenium/administration & dosage
- Selenium/pharmacology*
- Selenoproteins/metabolism*
- Thiobarbituric Acid Reactive Substances
- Zebrafish
- PubMed
- 25750091 Full text @ Fish Physiol. Biochem.
Citation
Betancor, M.B., Almaida-Pagán, P.F., Sprague, M., Hernández, A., Tocher, D.R. (2015) Roles of selenoprotein antioxidant protection in zebrafish, Danio rerio, subjected to dietary oxidative stress. Fish physiology and biochemistry. 41(3):705-20.
Abstract
In vertebrates, selenium (Se) is an essential micronutrient for vertebrates that is involved in antioxidant protection and thyroid hormone regulation among other roles and functions through its incorporation into proteins, the selenoproteins. Long-chain polyunsaturated fatty acids, such as docosahexaenoic acid (DHA), are essential nutrients for fish although high dietary levels may lead to increased oxidative stress due to the high degree of unsaturation. The present study investigated the effects of Se supplementation on zebrafish, Danio rerio, oxidative status together with selenoprotein expression profiles when subjected to a high-DHA diet. Fish were fed for 8 weeks with one of the four experimental diets, containing high or low DHA in combination with or without organic Se (7 mg/kg). Fish performance, Se content, fatty acid composition and TBARS of zebrafish were determined, as well as gene expression of selected selenoproteins in liver and muscle. The Se levels in whole fish reflected dietary content. High dietary DHA increased oxidative stress as indicated by reduced growth and high TBARS content, although Se supplementation reduced oxidation. The expression patterns of selenoproteins varied between liver and muscle with only deiodinase type II displaying a transcriptional response when high dietary Se was supplied. High dietary DHA decreased selenoprotein W expression in muscle and sps2 expression in liver regardless of the dietary Se content. These data suggest that oxidative stress protection associated with a high dietary intake of Se may not be solely mediated by transcriptional changes in teleost selenoprotein expression.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping