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Abstract:

During the last decade, special attention has been focused on the consequences of exposure to environmental estrogens on reproduction in wild fish species. For this reason, characterization of biomarkers of such exposures could result in useful tools for these studies. The detection of vitellogenin (Vtg), a precursor of yolk proteins, is being intensely studied since its synthesis in the liver is regulated by the estradiol-17β and is influenced by other estrogenic compounds. The aim of this work was to assess the presence of Vtg in the surface mucus of males of Cichlasoma dimerus (Teleostei, Perciformes), a typical South American freshwater cichlid, after hormonal treatment with estradiol-17β (intraperitoneal injections of 10 μg E 2 /g fish). Plasma and mucus from females and treated males analyzed by Western blot revealed that different heterologous antisera against Vtg bind to putative protein of 180 & 120 kDa and 120 & 110 kDa, respectively, whereas no reaction was found in samples of untreated males. The same profile was observed in mucus samples using Dot blot, a very easy and direct technique. Using immunocytochemistry techniques, immunoreactive Vtg (ir-Vtg) producing cells in the liver of females and treated males were detected. Testes and liver tissues were also assessed by histological techniques. Marked alterations in both organs were observed, such as lower sperm production, presence of immature germ cells in the lobular lumen of testes, and some morphology changes in the hepatocytes due to the accumulation of Vtg. This is the first report about the effects of an estrogen in the Vtg synthesis and their consequences on liver and gonads of a South American fresh water cichlid. These results also support the possibility of using Vtg from surface mucus as a potential biomarker for estrogenic compounds through a noninvasive, useful and easy assay to monitor the presence of endocrine disrupting chemicals in the environment. © 2002 Elsevier Science B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Vitellogenin detection in surface mucus of the South American cichlid fish Cichlasoma dimerus (Heckel, 1840) induced by estradiol-17β. Effects on liver and gonads
Autor:Moncaut, N.; Nostro, F.L.; Maggese, M.C.
Filiación:Departamento de Biodiversidad y Biología Experimental, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, 4to piso Buenos Aires C1428EHA, Argentina
Palabras clave:Cichlasoma dimerus; Cichlids; Estradiol; Liver and testes pathology; Mucus; Vitellogenin; antiserum; biological marker; estradiol; protein; vitellogenin; biomarker; estrogenic compound; fish; pollution exposure; reproduction; animal cell; animal experiment; animal tissue; article; bioaccumulation; cell function; cell maturation; cell structure; cichlid; controlled study; dot hybridization; environmental exposure; estrogen activity; female; freshwater environment; germ cell; histopathology; immunocytochemistry; immunoreactivity; lipogenesis; liver; liver cell; male; molecular weight; mucus; nonhuman; plasma; priority journal; protein synthesis; spermatogenesis; testis; Western blotting; Animals; Biological Markers; Cichlids; Environmental Exposure; Estradiol; Female; Gonads; Immunohistochemistry; Liver; Male; Mucus; Vitellogenins; South America; Cichlasoma; Cichlidae; Perciformes; Teleostei
Año:2003
Volumen:63
Número:2
Página de inicio:127
Página de fin:137
DOI: http://dx.doi.org/10.1016/S0166-445X(02)00175-3
Título revista:Aquatic Toxicology
Título revista abreviado:Aquatic Toxicol.
ISSN:0166445X
CAS:estradiol, 50-28-2; protein, 67254-75-5; Biological Markers; Estradiol, 50-28-2; Vitellogenins
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0166445X_v63_n2_p127_Moncaut

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Citas:

---------- APA ----------
Moncaut, N., Nostro, F.L. & Maggese, M.C. (2003) . Vitellogenin detection in surface mucus of the South American cichlid fish Cichlasoma dimerus (Heckel, 1840) induced by estradiol-17β. Effects on liver and gonads. Aquatic Toxicology, 63(2), 127-137.
http://dx.doi.org/10.1016/S0166-445X(02)00175-3
---------- CHICAGO ----------
Moncaut, N., Nostro, F.L., Maggese, M.C. "Vitellogenin detection in surface mucus of the South American cichlid fish Cichlasoma dimerus (Heckel, 1840) induced by estradiol-17β. Effects on liver and gonads" . Aquatic Toxicology 63, no. 2 (2003) : 127-137.
http://dx.doi.org/10.1016/S0166-445X(02)00175-3
---------- MLA ----------
Moncaut, N., Nostro, F.L., Maggese, M.C. "Vitellogenin detection in surface mucus of the South American cichlid fish Cichlasoma dimerus (Heckel, 1840) induced by estradiol-17β. Effects on liver and gonads" . Aquatic Toxicology, vol. 63, no. 2, 2003, pp. 127-137.
http://dx.doi.org/10.1016/S0166-445X(02)00175-3
---------- VANCOUVER ----------
Moncaut, N., Nostro, F.L., Maggese, M.C. Vitellogenin detection in surface mucus of the South American cichlid fish Cichlasoma dimerus (Heckel, 1840) induced by estradiol-17β. Effects on liver and gonads. Aquatic Toxicol. 2003;63(2):127-137.
http://dx.doi.org/10.1016/S0166-445X(02)00175-3