Selen w środowisku
Instytut Medycyny Pracy i Zdrowia Środowiskowego, Kierownik: mgr K. Kuźniewski
Katedra i Zakład Higieny Uniwersytetu Medycznego we Wrocławiu, Kierownik: prof. dr hab. n. med. K. Pawlas
Autor do korespondencji
Henryka Langauer-Lewowicka   

Instytut Medycyny Pracy i Zdrowia Środowiskowego ul. Kościelna 13, 41-200 Sosnowiec tel. 32 634 12 00
Med Srod. 2016;19(1):9-16
Artykuł omawia biologiczną rolę w ekosystemie selenu, pierwiastka śladowego u ssaków. Selen (Se) jest naturalnym komponentem peroksydazy glutationowej oraz innych selenoprotein. Uczestniczy w wielu biologicznych procesach w prewencji stresu oksydacyjnego, odpowiedzi nimmunologicznych, wytwarzaniu hormonów tarczycy. Stężenie Se w organizmach waha się znacznie w zależności od strefy geograficznej, stężenia w glebie, roślinach, diety. Nadmiar dowozu wywołuje ostrą bądź przewlekłą selenozę. Deficyt prowadzi do rozwoju niektórych endemicznych chorób chorób Keshan, Kashin-Beck.

The paper presents some information about selenium (Se) and its biological role in the ecosystem. Se is a trace element for mammals. It has been shown to be a natural component in the enzyme glutathione peroxydases and other selenoproteins. Se participates in various biological processes, such as antioxidant defence, thyroid hormone production, and immune responses. The concentration of Se in organisms varies widely between geographical areas, depending on its content in the soil, plants, and dietary intake. In larger amounts it can be toxic (acute or chronic selenosis). Its deficit in diet can trigger the development of some chronic diseases (Keshan, Kashin- Beck).
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