Myogenic program dysregulation is contributory to disease pathogenesis in spinal muscular atrophy.

Abstract:

:Mutations in the survival motor neuron (SMN1) gene lead to the neuromuscular disease spinal muscular atrophy (SMA). Although SMA is primarily considered as a motor neuron disease, the importance of muscle defects in its pathogenesis has not been fully examined. We use both primary cell culture and two different SMA model mice to demonstrate that reduced levels of Smn lead to a profound disruption in the expression of myogenic genes. This disruption was associated with a decrease in myofiber size and an increase in immature myofibers, suggesting that Smn is crucial for myogenic gene regulation and early muscle development. Histone deacetylase inhibitor trichostatin A treatment of SMA model mice increased myofiber size, myofiber maturity and attenuated the disruption of the myogenic program in these mice. Taken together, our work highlights the important contribution of myogenic program dysregulation to the muscle weakness observed in SMA.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Boyer JG,Deguise MO,Murray LM,Yazdani A,De Repentigny Y,Boudreau-Larivière C,Kothary R

doi

10.1093/hmg/ddu142

subject

Has Abstract

pub_date

2014-08-15 00:00:00

pages

4249-59

issue

16

eissn

0964-6906

issn

1460-2083

pii

ddu142

journal_volume

23

pub_type

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