Novel point mutations in survival motor neuron 1 gene expand the spectrum of phenotypes observed in spinal muscular atrophy patients

2014 ◽  
Vol 24 (7) ◽  
pp. 617-623 ◽  
Author(s):  
Maria Jędrzejowska ◽  
Monika Gos ◽  
Janusz G. Zimowski ◽  
Anna Kostera-Pruszczyk ◽  
Barbara Ryniewicz ◽  
...  
Keyword(s):  
Spinal Muscular Atrophy ◽  
Motor Neuron ◽  
Muscular Atrophy ◽  
Point Mutations ◽  
Survival Motor Neuron

scholarly journals Salbutamol inhibits ubiquitin-mediated survival motor neuron protein degradation in spinal muscular atrophy cells

2015 ◽  
Vol 4 ◽  
pp. 351-356 ◽  
Author(s):  
Nur Imma Fatimah Harahap ◽  
Dian Kesumapramudya Nurputra ◽  
Mawaddah Ar Rochmah ◽  
Ai Shima ◽  
Naoya Morisada ◽  
...  
Keyword(s):  
Spinal Muscular Atrophy ◽  
Motor Neuron ◽  
Protein Degradation ◽  
Muscular Atrophy ◽  
Survival Motor Neuron ◽  
Survival Motor Neuron Protein ◽  
Motor Neuron Protein

scholarly journals Molecular Mechanisms of Neurodegeneration in Spinal Muscular Atrophy

2016 ◽  
Vol 10 ◽  
pp. JEN.S33122 ◽  
Author(s):  
Saif Ahmad ◽  
Kanchan Bhatia ◽  
Annapoorna Kannan ◽  
Laxman Gangwani
Keyword(s):  
Spinal Muscular Atrophy ◽  
Motor Neuron ◽  
Motor Neurons ◽  
Molecular Mechanisms ◽  
Muscular Atrophy ◽  
Survival Motor Neuron ◽  
Skeletal Muscle Atrophy ◽  
Spinal Motor Neurons ◽  
Low Levels ◽  
Smn Protein

Spinal muscular atrophy (SMA) is an autosomal recessive motor neuron disease with a high incidence and is the most common genetic cause of infant mortality. SMA is primarily characterized by degeneration of the spinal motor neurons that leads to skeletal muscle atrophy followed by symmetric limb paralysis, respiratory failure, and death. In humans, mutation of the Survival Motor Neuron 1 (SMN1) gene shifts the load of expression of SMN protein to the SMN2 gene that produces low levels of full-length SMN protein because of alternative splicing, which are sufficient for embryonic development and survival but result in SMA. The molecular mechanisms of the (a) regulation of SMN gene expression and (b) degeneration of motor neurons caused by low levels of SMN are unclear. However, some progress has been made in recent years that have provided new insights into understanding of the cellular and molecular basis of SMA pathogenesis. In this review, we have briefly summarized recent advances toward understanding of the molecular mechanisms of regulation of SMN levels and signaling mechanisms that mediate neurodegeneration in SMA.

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