Autophagy dysregulation in cell culture and animals models of spinal muscular atrophy.

Autophagy dysregulation in cell culture and animals models of spinal muscular atrophy.
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DOI:
10.1016/j.mcn.2014.06.006
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发表时间:
2014-07
期刊:
Molecular and cellular neurosciences
影响因子:
--
通讯作者:
Androphy EJ
Androphy EJ
中科院分区:
其他
文献类型:
--
作者:
Custer SK;Androphy EJ

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Abnormal autophagy has become a central thread linking neurodegenerative diseases, particularly of the motor neuron. One such disease is spinal muscular atrophy (SMA), a genetic neuromuscular disorder caused by mutations in the SMN1 gene resulting in low levels of Survival Motor Neuron (SMN) protein. Despite knowing the causal protein, the exact intracellular processes that are involved in the selective loss of motor neurons remains unclear. Autophagy induction can be helpful or harmful depending on the situation, and we sought to understand the state of the autophagic response in SMA. We show that cell culture and animal models demonstrate induction of autophagy accompanied by attenuated autophagic flux, resulting in the accumulation of autophagosomes and their associated cargo. Expression of the SMN-binding protein a-COP, a known modulator of autophagic flux, can ameliorate this autophagic traffic jam.
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