TITLE

Nuclear trafficking in amyotrophic lateral sclerosis and frontotemporal lobar degeneration

AUTHOR(S)
Mihevc, Sonja Prpar; Darovic, Simona; Kovanda, Anja; Česnik, Ana Bajc; Župunski, Vera; Rogelj, Boris; Prpar Mihevc, Sonja; Bajc Česnik, Ana
PUB. DATE
January 2017
SOURCE
Brain: A Journal of Neurology;Jan2017, Vol. 140 Issue 1, p13
SOURCE TYPE
Academic Journal
DOC. TYPE
journal article
ABSTRACT
Amyotrophic lateral sclerosis and frontotemporal lobar degeneration are two ends of a phenotypic spectrum of disabling, relentlessly progressive and ultimately fatal diseases. A key characteristic of both conditions is the presence of TDP-43 (encoded by TARDBP) or FUS immunoreactive cytoplasmic inclusions in neuronal and glial cells. This cytoplasmic mislocalization of otherwise predominantly nuclear RNA binding proteins implies a perturbation of the nucleocytoplasmic shuttling as a possible event in the pathogenesis. Compromised nucleocytoplasmic shuttling has recently also been associated with a hexanucleotide repeat expansion mutation in C9orf72, which is the most common genetic cause of amyotrophic lateral sclerosis and frontotemporal lobar degeneration, and leads to accumulation of cytoplasmic TDP-43 inclusions. Mutation in C9orf72 may disrupt nucleocytoplasmic shuttling on the level of C9ORF72 protein, the transcribed hexanucleotide repeat RNA, and/or dipeptide repeat proteins translated form the hexanucleotide repeat RNA. These defects of nucleocytoplasmic shuttling may therefore, constitute the common ground of the underlying disease mechanisms in different molecular subtypes of amyotrophic lateral sclerosis and frontotemporal lobar degeneration.
ACCESSION #
120486159

 

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