TY - JOUR
T1 - Mutant SOD1 increases APP expression and phosphorylation in cellular and animal models of ALS
AU - Rabinovich-Toidman, Polina
AU - Rabinovich-Nikitin, Inna
AU - Ezra, Assaf
AU - Barbiro, Beka
AU - Fogel, Hilla
AU - Slutsky, Inna
AU - Solomon, Beka
N1 - Publisher Copyright: © 2015 Rabinovich-Toidman et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
PY - 2015/11
Y1 - 2015/11
N2 - Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease and it is the most common adult onset neurodegenerative disorder affecting motor neurons. There is currently no effective treatment for ALS and our understanding of the pathological mechanism is still far away from prevention and/or treatment of this devastating disease. Amyloid precursorprotein (APP) is a transmembrane protein that undergoes processing either by β-secretase or α-secretase, followed by γ-secretase. In the present study, we show that APP levels, and aberrant phosphorylation, which is associated with enhanced β-secretase cleavage, are increased in SOD1G93A ALS mouse model. Fluorescence resonance energy transfer (FRET) analysis suggests a close interaction between SOD1 and APP at hippocampal synapses. Notably, SOD1G93A mutation induces APP-SOD1 conformational changes, indicatinga crosstalk between these two signaling proteins. Inhibition of APP processing via monoclonal antibody called BBS that blocks APP β-secretase cleavage site, resulted in reduction of mutant SOD1G93A levels in animal and cellular models of ALS, significantly prolongedlife span of SOD1G93A mice and diminished inflammation. Beyond its effect on toxic mutant SOD1G93A, BBS treatment resulted in a reduction in the levels of APP, its processingproduct soluble APPβ and pro-apoptotic p53. This study demonstrates that APP and its processingproducts contribute to ALS pathology through several different pathways; thus BBS antibody could be a promising neuroprotective strategy for treatment of this disease.
AB - Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease and it is the most common adult onset neurodegenerative disorder affecting motor neurons. There is currently no effective treatment for ALS and our understanding of the pathological mechanism is still far away from prevention and/or treatment of this devastating disease. Amyloid precursorprotein (APP) is a transmembrane protein that undergoes processing either by β-secretase or α-secretase, followed by γ-secretase. In the present study, we show that APP levels, and aberrant phosphorylation, which is associated with enhanced β-secretase cleavage, are increased in SOD1G93A ALS mouse model. Fluorescence resonance energy transfer (FRET) analysis suggests a close interaction between SOD1 and APP at hippocampal synapses. Notably, SOD1G93A mutation induces APP-SOD1 conformational changes, indicatinga crosstalk between these two signaling proteins. Inhibition of APP processing via monoclonal antibody called BBS that blocks APP β-secretase cleavage site, resulted in reduction of mutant SOD1G93A levels in animal and cellular models of ALS, significantly prolongedlife span of SOD1G93A mice and diminished inflammation. Beyond its effect on toxic mutant SOD1G93A, BBS treatment resulted in a reduction in the levels of APP, its processingproduct soluble APPβ and pro-apoptotic p53. This study demonstrates that APP and its processingproducts contribute to ALS pathology through several different pathways; thus BBS antibody could be a promising neuroprotective strategy for treatment of this disease.
UR - http://www.scopus.com/inward/record.url?scp=84963864308&partnerID=8YFLogxK
U2 - https://doi.org/10.1371/journal.pone.0143420
DO - https://doi.org/10.1371/journal.pone.0143420
M3 - مقالة
SN - 1932-6203
VL - 10
JO - PLoS ONE
JF - PLoS ONE
IS - 11
M1 - e0143420
ER -