Ferritin and hemocyanin: 210Po molecular traps in marine fish, oyster and lobster

International audience The relative degree of binding of 210Po with fish, mollusc and crustacean ferritins was investigated. Comparison of 210Po concentrations in the purified ferritins from liver of the Atlantic mackerel Scomber scombrus and from the visceral mass of oysters Crassostrea gigas confi...

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Bibliographic Details
Published in:Marine Ecology Progress Series
Main Authors: Durand, Jp, Goudard, F, Barbot, C., Pieri, J, Fowler, Sw, Cotret, O
Other Authors: Laboratoire GERMETRAD (GERMETRAD), Université de Nantes (UN), Mer, molécules et santé EA 2160 (MMS), Le Mans Université (UM)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences Pharmaceutiques et Biologiques, Université de Nantes (UN)-Université de Nantes (UN), Marine Environment Laboratories Monaco (IAEA-MEL), International Atomic Energy Agency Vienna (IAEA)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2002
Subjects:
Hemocyanin
Fish
Oyster
Lobster
Ferritin
Polonium
[CHIM]Chemical Sciences
[CHIM.RADIO]Chemical Sciences/Radiochemistry
Crassostrea gigas
Homarus gammarus
Online Access:https://hal-normandie-univ.archives-ouvertes.fr/hal-02278744
https://doi.org/10.3354/meps233199
Description
Summary:International audience The relative degree of binding of 210Po with fish, mollusc and crustacean ferritins was investigated. Comparison of 210Po concentrations in the purified ferritins from liver of the Atlantic mackerel Scomber scombrus and from the visceral mass of oysters Crassostrea gigas confirmed the high affinity of polonium for these iron-containing proteins. The ferritin fraction in lobster Homarus gammarus hepatopancreas contained an order of magnitude more 210Po than pure ferritin from fish and oyster; however, the hepatopancreatic ferritin fraction was not pure and it also contained the respiratory protein hemocyanin. A high performance size-exclusion chromatography analysis further revealed the important contribution of hemocyanin to 210Po fixation in lobster. The combined 210Po binding capacity of ferritin and hemocyanin in lobster hepatopancreas most probably accounts for the very high 210Po concentrations found in the hepatopancreas of many higher crustaceans.

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