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Cytosolic distributions of highly toxic metals Cd and Tl and several essential elements in the liver of brown trout (Salmo trutta L.) analyzed by size exclusion chromatography and inductively coupled plasma mass spectrometry

Dragun, Zrinka; Krasnići, Nesrete; Kolar, Nicol; Filipović Marijić, Vlatka; Ivanković, Dušica; Erk, Marijana (2018) Cytosolic distributions of highly toxic metals Cd and Tl and several essential elements in the liver of brown trout (Salmo trutta L.) analyzed by size exclusion chromatography and inductively coupled plasma mass spectrometry. Chemosphere, 207 . pp. 162-173. ISSN 0045-6535

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Abstract

Cytosolic distributions of nonessential metals Cd and Tl and seven essential elements among compounds of different molecular masses were studied in the liver of brown trout (Salmo trutta) from the karstic Krka River in Croatia. Analyses were done by size exclusion high performance liquid chromatography and high resolution inductively coupled plasma mass spectrometry. Common feature of Cd and Tl, as highly toxic elements, was their distribution within only two narrow peaks. The increase of cytosolic Cd concentrations was reflected in marked increase of Cd elution within low molecular mass peak (maximum at ∼15 kDa), presumably containing metallothioneins (MTs), which indicated successful Cd detoxification in brown trout liver under studied exposure conditions. Contrary, the increase of cytosolic Tl concentrations was reflected in marked increase of Tl elution within high molecular mass peak (maximum at 140 kDa), which probably indicated incomplete Tl detoxification. Common feature of the majority of studied essential elements was their distribution within more peaks, often broad and not well resolved, which is consistent with their numerous physiological functions. Among observed associations of essential metals/nonmetal to proteins, the following could be singled out: Cu and Zn association to MTs, Fe association to storage protein ferritin, and Se association to compounds of very low molecular masses (<5 kDa). The obtained results present the first step towards identification of metal-binding compounds in hepatic cytosol of brown trout, and thus a significant contribution to better understanding of metal fate in the liver of that important bioindicator species.

Item Type: Article
Additional Information: This study was carried out within the project "Accumulation, subcellular mapping and effects of trace metals in aquatic organisms" (CSF Research project no.: IP-09-2014-4255), financed by Croatian Science Foundation (CSF). The financial support of the Ministry of Science and Education of the Republic of Croatia for institutional funding of the Laboratory for Biological Effects of Metals is also acknowledged. The authors would also like to thank Dr. Damir Valic, Dr. Damir Kapetanovic and Jakov Zunic, DVM, for invaluable assistance in fish sampling.
Uncontrolled Keywords: fish; hepatic biomolecules; ICP-MS, Krka River; metallothioneins; SEC-HPLC
Subjects: NATURAL SCIENCES > Chemistry
NATURAL SCIENCES > Chemistry > Analytic Chemistry
NATURAL SCIENCES > Biology
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Environmental Science
Divisions: Division for Marine and Enviromental Research
Projects:
Project titleProject leaderProject codeProject type
Akumulacija, unutarstanično mapiranje i učinci metala u tragovima u akvatičkih orbganizama-AQUAMAPMETMarijana ErkIP-2014-09-4255HRZZ
Depositing User: Zrinka Dragun
Date Deposited: 09 Dec 2019 13:24
Last Modified: 09 Dec 2019 13:24
URI: http://fulir.irb.hr/id/eprint/5242
DOI: 10.1016/j.chemosphere.2018.05.088

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