Peripherin is not a contributing factor to motor neuron disease in a mouse model of amyotrophic lateral sclerosis caused by mutant superoxide dismutase.
Peripherin is a type III intermediate filament protein detected in axonal spheroids associated with amyotrophic lateral sclerosis (ALS). The overexpression of peripherin induces degeneration of spinal motor neurons during aging in transgenic mice and in cultured neuronal cells derived from peripherin transgenic embryos. Here, we investigated whether peripherin is a contributor of pathogenesis in mice overexpressing a mutant superoxide dismutase 1 (SOD1(G37R)) gene linked to familial ALS. This was done by the generation and analysis of SOD1(G37R) mice that either overexpress a peripherin transgene (G37R;TgPer mice) or lack the endogenous peripherin gene (G37R;Per-/- mice). Surprisingly, upregulation or suppression of peripherin expression had no effects on disease onset, mortality, and loss of motor neurons in SOD1(G37R) mice. These results provide compelling evidence that peripherin is not a key contributor of motor neuron degeneration associated with toxicity of mutant SOD1.
Larivière
Roxanne C
RC
Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre, McGill University, Montréal, Québec H3G 1A4, Canada.
Beaulieu
Jean-Martin
JM
Nguyen
Minh Dang
MD
Julien
Jean-Pierre
JP
D000690:Amyotrophic Lateral Sclerosis / Q000378:metabolism*; D000818:Animals; D015153:Blotting, Western; D004195:Disease Models, Animal; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D007381:Intermediate Filament Proteins / Q000235:genetics / Q000378:metabolism*; D008562:Membrane Glycoproteins; D051379:Mice; D018345:Mice, Knockout; D008822:Mice, Transgenic; D009046:Motor Neurons / Q000378:metabolism*; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism*; D064531:Peripherins; D012333:RNA, Messenger / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013482:Superoxide Dismutase / Q000235:genetics*; D000072105:Superoxide Dismutase-1; D015854:Up-Regulation
D007381:Intermediate Filament Proteins; D008562:Membrane Glycoproteins; D009419:Nerve Tissue Proteins; D064531:Peripherins; D012333:RNA, Messenger; C000606291:Sod1 protein, mouse; D013482:Superoxide Dismutase; D000072105:Superoxide Dismutase-1