Artículo
The role of metallothioneins, selenium and transfer to offspring in mercury detoxification in Franciscana dolphins (Pontoporia blainvillei)
Romero, María Belén
; Polizzi, Paula Sabrina
; Chiodi Boudet, Leila Natalia
; Das, Kalyan; Gerpe, Marcela Silvia
Fecha de publicación:
19/08/2016
Editorial:
Pergamon-Elsevier Science Ltd
Revista:
Marine Pollution Bulletin
ISSN:
0025-326X
e-ISSN:
1879-3363
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The concentrations of mercury (Hg), selenium (Se) and metallothioneins (MT) were evaluated in fetuses, calves, juveniles and adults of the endangered coastal Franciscana dolphin (Pontoporia blainvillei) from Argentina. Mercury concentrations varied among analyzed tissues (liver, kidney, muscle and brain), with liver showing the higher concentrations in all specimens. An age-dependent accumulation was found in liver, kidney and brain. No significant relationship between Hg and MT concentrations was found for all tissues analyzed. Hepatic Hg molar concentrations were positively correlated with those of Se, indicating a great affinity between these two elements. Furthermore, dark granules of HgSe were observed in Kupffer cells in the liver by electron microscopy, suggesting the role of this macrophage in the detoxification of Hg. A transfer of Hg through placenta was proved. The presence of Hg in brain in all age classes did not show concentrations associated with neurotoxicity.
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Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Citación
Romero, María Belén; Polizzi, Paula Sabrina; Chiodi Boudet, Leila Natalia; Das, Kalyan; Gerpe, Marcela Silvia; The role of metallothioneins, selenium and transfer to offspring in mercury detoxification in Franciscana dolphins (Pontoporia blainvillei); Pergamon-Elsevier Science Ltd; Marine Pollution Bulletin; 109; 1; 19-8-2016; 650-654
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