Reference : Mitochondrial Defects and Neurodegeneration in Mice Overexpressing Wild Type or G399S...
Scientific journals : Article
Life sciences : Biotechnology
Life sciences : Genetics & genetic processes
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
Human health sciences : Neurology
http://hdl.handle.net/10993/22514
Mitochondrial Defects and Neurodegeneration in Mice Overexpressing Wild Type or G399S Mutant HtrA2
English
Casadei, Nicolas [> >]
Sood, Poonan [> >]
Ulrich, Thomas [> >]
Kieper, Nicole [> >]
Helling, Stefan [> >]
May, Caroline [> >]
Glaab, Enrico mailto [University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > >]
Chen, Jing [> >]
Nuber, Silke [> >]
Marcus, Katrin [> >]
Rapaport, Doron [> >]
Ott, Thomas [> >]
Riess, O. [> >]
Krüger, Rejko mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Life Science Research Unit]
Fitzgerald, Julia [> >]
2016
Human Molecular Genetics
Oxford University Press
25
3
459-71
Yes (verified by ORBilu)
International
0964-6906
1460-2083
Oxford
United Kingdom
[en] HtrA2 ; Parkinson's disease ; Mitochondria ; Mouse model ; bioinformatics ; protein structure analysis
[en] The protease HtrA2 has a protective role inside mitochondria, but promotes apoptosis under stress. We previously identified the G399S HtrA2 mutation in Parkinson's disease (PD) patients and reported mitochondrial dysfunction in vitro. Mitochondrial dysfunction is a common feature of PD and related to neurodegeneration. Complete loss of HtrA2 has been shown to cause neurodegeneration in mice. However, the full impact of HtrA2 overexpression or the G399S mutation is still to be determined in vivo. Here, we report the first HtrA2 G399S transgenic mouse model. Our data suggest that the mutation has a dominant-negative effect. We also describe a toxic effect of wild-type (WT) HtrA2 overexpression. Only low overexpression of the G399S mutation allowed viable animals and we suggest that the mutant protein is likely unstable. This is accompanied by reduced mitochondrial respiratory capacity and sensitivity to apoptotic cell death. Mice overexpressing WT HtrA2 were viable, yet these animals have inhibited mitochondrial respiration and significant induction of apoptosis in the brain leading to motor dysfunction, highlighting the opposing roles of HtrA2. Our data further underscore the importance of HtrA2 as a key mediator of mitochondrial function and its fine regulatory role in cell fate. The location and abundance of HtrA2 is tightly controlled and, therefore, human mutations leading to gain- or loss of function could provide significant risk for PD-related neurodegeneration.
University of Luxembourg: High Performance Computing - ULHPC ; Luxembourg Centre for Systems Biomedicine (LCSB): Biomedical Data Science (Glaab Group) ; Luxembourg Centre for Systems Biomedicine (LCSB): Clinical & Experimental Neuroscience (Krüger Group)
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/22514
also: http://hdl.handle.net/10993/23238
10.1093/hmg/ddv485
This is a pre-copyedited, author-produced PDF of an article accepted for publication in Human Molecular Genetics following peer review. The version of record (Casadei et al., Human Molecular Genetics, 2015) is available online at: http://hmg.oxfordjournals.org/content/early/2015/12/17/hmg.ddv485
(c) The Author 2015. Published by Oxford University Press. All rights reserved.
FnR ; FNR5782168 > Enrico Glaab > ExPDIENT > Exploring Parkinson’s Disease Inhibitor Efficacy on a Non-dopaminergic Target > 01/12/2013 > 31/05/2016 > 2013

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