PUBLICATION
Chronic exposure to environmental levels of tribromophenol impairs zebrafish reproduction
- Authors
- Deng, J., Liu, C., Yu, L., and Zhou, B.
- ID
- ZDB-PUB-091204-17
- Date
- 2010
- Source
- Toxicology and applied pharmacology 243(1): 87-95 (Journal)
- Registered Authors
- Yu, Liqun
- Keywords
- Tribromophenol, Endocrine disruption, Sex hormones, Steroidogenic genes, Reproduction, Zebrafish
- MeSH Terms
-
- Animals
- Cytochrome P-450 Enzyme System
- Dose-Response Relationship, Drug
- Estradiol/blood
- Female
- Gene Expression Profiling
- Gene Expression Regulation/physiology
- Male
- Phenols/toxicity*
- Reproduction/drug effects*
- Testosterone/blood
- Testosterone/genetics
- Testosterone/metabolism
- Vitellogenins/genetics
- Vitellogenins/metabolism
- Water Pollutants, Chemical
- Zebrafish
- PubMed
- 19931292 Full text @ Tox. App. Pharmacol.
- CTD
- 19931292
Citation
Deng, J., Liu, C., Yu, L., and Zhou, B. (2010) Chronic exposure to environmental levels of tribromophenol impairs zebrafish reproduction. Toxicology and applied pharmacology. 243(1):87-95.
Abstract
Tribromophenol (2,4,6-TBP) is ubiquitously found in aquatic environments and biota. In this study, we exposed zebrafish embryos (F(0); 2"" days post-fertilization, dpf) to environmental concentration (0.3 mug/L) and a higher concentration (3.0 mug/L) of TBP and assessed the impact of chronic exposure (120 dpf) on reproduction. TBP exposure did not cause a significant increase in the malformation and reduction in the survival in the F(0)-generation fish. After TBP exposure, the plasma testosterone and estradiol levels significantly increased in males and decreased in females. The transcription of steroidogenic genes (3beta-HSD, 17beta-HSD, CYP17, CYP19A, CYP19B) was significantly upregulated in the brain and testes in males and downregulated in the brain and ovary in females. TBP exposure significantly downregulated and upregulated the expression of VTG in the liver of female and male fish, respectively. Meanwhile, TBP exposure altered the sex ratio toward a male-dominant state. The F(1)-generation larvae exhibited increased malformation, reduced survival, and retarded growth, suggesting that TBP in the aquatic environment has significant adverse effects on fish population.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping