Send to

Choose Destination
FEBS Lett. 1995 Jul 10;368(1):59-63.

AP-1 DNA-binding activity is inhibited by selenite and selenodiglutathione.

Author information

Medical Nobel Institute for Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.


The binding of the transcription factor AP-1 to DNA has been shown to be modulated by redox control mechanisms. Selenite and selenodiglutathione (GS-Se-SG), inhibit mammalian cell growth and are efficient oxidants of reduced thioredoxin and reduced thioredoxin reductase. Here, we report that selenite and GS-Se-SG efficiently inhibited AP-1 DNA-binding in nuclear extracts from 3B6 lymphocytes. A GS-Se-SG concentration of 0.75 microM resulted in 50% inhibition of AP-1 DNA-binding, whereas the same effect was achieved with 7.5 microM selenite. Nuclear extracts prepared from human 3B6 lymphocytes exposed for 4 h to 10 microM selenite showed a 50% reduction of AP-1 binding. These data suggest that selenite and selenodiglutathione inactivate the AP-1 factor and provide a mechanism by which selenium compounds inhibit cell growth.

[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center