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2014 ; 825
(ä): 353-88
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RNA-binding protein misregulation in microsatellite expansion disorders
#MMPMID25201111
Goodwin M
; Swanson MS
Adv Exp Med Biol
2014[]; 825
(ä): 353-88
PMID25201111
show ga
RNA-binding proteins (RBPs) play pivotal roles in multiple cellular pathways from
transcription to RNA turnover by interacting with RNA sequence and/or structural
elements to form distinct RNA-protein complexes. Since these complexes are
required for the normal regulation of gene expression, mutations that alter RBP
functions may result in a cascade of deleterious events that lead to severe
disease. Here, we focus on a group of hereditary disorders, the microsatellite
expansion diseases, which alter RBP activities and result in abnormal
neurological and neuromuscular phenotypes. While many of these diseases are
classified as adult-onset disorders, mounting evidence indicates that disruption
of normal RNA-protein interaction networks during embryogenesis modifies
developmental pathways, which ultimately leads to disease manifestations later in
life. Efforts to understand the molecular basis of these disorders has already
uncovered novel pathogenic mechanisms, including RNA toxicity and
repeat-associated non-ATG (RAN) translation, and current studies suggest that
additional surprising insights into cellular regulatory pathways will emerge in
the future.