Different selenium-containing proteins in the extracellular and intracellular media of leucocytes cultivated in vitro

Biological Trace Element Research
Q LiuJ Clausen

Abstract

The purpose of this communication is to elucidate if selenium plays a role in the function of granulocytes and lymphocytes. Thus, the incorporation of selenium in proteins from granulocytes and lymphocytes cultured with 1 microCi/mL radioactive Na2(75)SeO3 was studied. The protein peaks containing 75Se from two columns of Heparin Sepharose CL-6B and Sephacryl S-200 HR were separated further by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis. The results showed that the incorporation of 75Se into granulocytes was about six times higher than that of lymphocytes during a 96-h cultivation, however, the GSH-Px activity in granulocytes did not change significantly. On the other hand, the GSH-Px activity of lymphocytes rose significantly after three days cultivation. These data indicated that the main chemical form of selenium in granulocytes was not GSH-Px. Results from SDS-PAGE revealed a strongly 75Se-labeled protein band with subunit molecular weight of 15 kDa in the supernatant of granulocyte homogenate. However, the main chemical forms of selenium in the culture media of granulocytes and lymphocytes were found to be selenoprotein P. The different forms of selenium-containing proteins in the intracel...Continue Reading

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Citations

May 18, 1999·Biological Trace Element Research·Q LiuJ Clausen
Aug 21, 2013·Biological Trace Element Research·Wayne Chris HawkesZeynep Alkan
Jan 11, 2012·Antioxidants & Redox Signaling·Anne RöselerKatja Becker
Dec 6, 2011·The Journal of Nutritional Biochemistry·Anna P KippRegina Brigelius-Flohé
Sep 15, 2009·Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)·Wayne Chris HawkesZeynep Alkan

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