[en] Peroxisome proliferator-activated receptor gamma (PPARgamma) activation results in an increased rate of amyloid-beta (Abeta) clearance from the media of diverse cells in culture, including primary neurons and glial cells. Here, we further investigate the mechanism for Abeta clearance and found that PPARgamma activation modulates a cell surface metalloprotease that can be inhibited by metalloprotease inhibitors, like EDTA and phenanthroline, and also by the peptide hormones insulin and glucagon. The metalloprotease profile of the Abeta-degrading mechanism is surprisingly similar to insulin-degrading enzyme (IDE). This mechanism is maintained in hippocampal and glia primary cultures from IDE loss-of-function mice. We conclude that PPARgamma activates an IDE-like Abeta degrading activity. Our work suggests a drugable pathway that can clear Abeta peptide from the brain.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Espuny Camacho, Ira Mercedes ; VIB, KU Leuven, Leuven, Belgium > Department of Developmental and Molecular Genetics, Center for Human Genetics
Dominguez, D; VIB, KU Leuven, Leuven, Belgium > Department of Developmental and Molecular Genetics, Center for Human Genetics
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