Back to Search
Start Over
Down-regulation of insulin-degrading enzyme by presenilin 1 V97L mutant potentially underlies increased levels of amyloid beta 42.
- Source :
-
The European journal of neuroscience [Eur J Neurosci] 2008 May; Vol. 27 (9), pp. 2425-32. - Publication Year :
- 2008
-
Abstract
- Amyloid beta (Abeta)42 plays a pivotal role in Alzheimer's disease. We previously reported a novel presenilin (PS)1 mutant (V97L) that was expressed in related patients with early onset Alzheimer's disease. We found that patients with the V97L mutation had increased levels of extracellular and intracellular Abeta42. Here we found that the increased extracellular level of Abeta42 was always accompanied by a reduction of insulin-degrading enzyme (IDE) activity on the plasma membranes. However, increase of intracellular Abeta42 was associated with decreased expression and activity of IDE in the cytosol and endoplasmic reticulum in the PS1 V97L mutant-transfected human SH-SY5Y cell line. These studies indicate that pathological levels of Abeta42 may be caused by the negative effects of PS1 (V97L) on IDE expression and activity. Our findings provide evidence for the molecular basis of familial Alzheimer's disease pathogenesis.
- Subjects :
- Blotting, Western
Cell Line, Tumor
Cell Membrane chemistry
Cell Membrane enzymology
Cytoplasm chemistry
Cytoplasm enzymology
Down-Regulation
Fluorescent Antibody Technique
Humans
Mutation
Reverse Transcriptase Polymerase Chain Reaction
Alzheimer Disease enzymology
Alzheimer Disease genetics
Amyloid beta-Peptides metabolism
Insulysin metabolism
Presenilin-1 genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1460-9568
- Volume :
- 27
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- The European journal of neuroscience
- Publication Type :
- Academic Journal
- Accession number :
- 18445230
- Full Text :
- https://doi.org/10.1111/j.1460-9568.2008.06207.x