TY  - JOUR
AU  - Abdeen, Amr H.
AU  - Trist, Benjamin G.
AU  - Nikseresht, Sara
AU  - Harwood, Richard
AU  - Roudeau, Stéphane
AU  - Rowlands, Benjamin D.
AU  - Kreilaus, Fabian
AU  - Cottam, Veronica
AU  - Mor, David
AU  - Richardson, Miriam
AU  - Siciliano, Joel
AU  - Forkgen, Julia
AU  - Schaffer, Greta
AU  - Genoud, Sian
AU  - Li, Anne A.
AU  - Proschogo, Nicholas
AU  - Antonio, Bernadeth
AU  - Falkenberg, Gerald
AU  - Brueckner, Dennis
AU  - Kysenius, Kai
AU  - Liddell, Jeffrey R.
AU  - Fat, Sandrine Chan Moi
AU  - Wu, Sharlynn
AU  - Fifita, Jennifer
AU  - Lockwood, Thomas E.
AU  - Bishop, David P.
AU  - Blair, Ian
AU  - Ortega, Richard
AU  - Crouch, Peter J.
AU  - Double, Kay
TI  - Parkinson-like wild-type superoxide dismutase 1 pathology induces nigral dopamine neuron degeneration in a novel murine model
JO  - Acta neuropathologica
VL  - 149
IS  - 1
SN  - 0001-6322
CY  - Heidelberg
PB  - Springer
M1  - PUBDB-2025-02394
SP  - 22
PY  - 2025
AB  - Atypical wild-type superoxide dismutase 1 (SOD1) protein misfolding and deposition occurs specifically within the degenerating substantia nigra pars compacta (SNc) in Parkinson disease. Mechanisms driving the formation of this pathology and relationship with SNc dopamine neuron health are yet to be fully understood. We applied proteomic mass spectrometry and synchrotron-based biometal quantification to post-mortem brain tissues from the SNc of Parkinson disease patients and age-matched controls to uncover key factors underlying the formation of wild-type SOD1 pathology in this disorder. We also engineered two of these factors - brain copper deficiency and upregulated SOD1 protein levels - into a novel mouse strain, termed the SOCK mouse, to verify their involvement in the development of Parkinson-like wild-type SOD1 pathology and their impact on dopamine neuron health. Soluble SOD1 protein in the degenerating Parkinson disease SNc exhibited altered post-translational modifications, which may underlie changes to the enzymatic activity and aggregation of the protein in this region. These include decreased copper binding, dysregulation of physiological glycosylation, and atypical oxidation and glycation of key SOD1 amino acid residues. We demonstrated that the biochemical profile introduced in SOCK mice promotes the same post-translational modifications and the development of Parkinson-like wild-type SOD1 pathology in the midbrain and cortex. This pathology accumulates progressively with age and is accompanied by nigrostriatal degeneration and dysfunction, which occur in the absence of α-synuclein deposition. These mice do not exhibit weight loss nor spinal cord motor neuron degeneration, distinguishing them from transgenic mutant SOD1 mouse models. This study provides the first in vivo evidence that mismetallation and altered post-translational modifications precipitates wild-type SOD1 misfolding, dysfunction, and deposition in the Parkinson disease brain, which may contribute to SNc dopamine neuron degeneration. Our data position this pathology as a novel drug target for this disorder, with a particular focus on therapies capable of correcting alterations to SOD1 post-translational modifications. 
LB  - PUB:(DE-HGF)16
C6  - pmid:40042537
DO  - DOI:10.1007/s00401-025-02859-6
UR  - https://bib-pubdb1.desy.de/record/633348
ER  -