Vitellogenin induction and increased plasma 17beta-estradiol concentrations in male Nile tilapia, Oreochromis niloticus, exposed to organochlorine pollutants and polycyclic aromatics hydrocarbons

Vitellogenin (Vtg), 17beta-estradiol (E2) and testosterone (T) were used as biomarkers of endocrine disruption in mature male nile tilapia (Oreochromis niloticus) from three lakes (Rio, Enmedio and Limon) in Chiapas, Mexico. Vitellogenesis induction was found in tilapias from Rio and Limon, moderate...

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Published inBulletin of environmental contamination and toxicology Vol. 81; no. 6; p. 543
Main Authors Rodas-Ortíz, Juan Pablo, Ceja-Moreno, Victor, Chan-Cocom, Maria Eulalia, Gold-Bouchot, Gerardo
Format Journal Article
LanguageEnglish
Published United States 01.12.2008
Subjects
Animals
Benzo(a)pyrene - metabolism
Benzo(a)pyrene - toxicity
Endocrine Disruptors - toxicity
Estradiol - blood
Hexachlorobenzene - metabolism
Hexachlorobenzene - toxicity
Hydrocarbons, Chlorinated - toxicity
Male
Mexico
Polycyclic Aromatic Hydrocarbons - toxicity
Tilapia - blood
Tilapia - physiology
Vitellogenesis - drug effects
Vitellogenins - blood
Water Pollutants, Chemical - toxicity
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Summary:Vitellogenin (Vtg), 17beta-estradiol (E2) and testosterone (T) were used as biomarkers of endocrine disruption in mature male nile tilapia (Oreochromis niloticus) from three lakes (Rio, Enmedio and Limon) in Chiapas, Mexico. Vitellogenesis induction was found in tilapias from Rio and Limon, moderately high E(2) levels in Rio and Limon tilapias, compared with controls (cultured tilapias). Significant correlations between benzo(a)pyrene (BaP) metabolites and hexachlorobenzene (HCB) with Vtg and E(2) were found. The results of this study indicate that endocrine disruption exists in tilapias from Rio and Limon lakes, and that exposure to HCB and BaP could be causing these alterations.
ISSN:1432-0800