Neuronal matrix metalloproteinase-9 is a determinant of selective neurodegeneration.
Neuronal matrix metalloproteinase-9 is a determinant of selective neurodegeneration.
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DOI:
10.1016/j.neuron.2013.12.009
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发表时间:
2014-01-22
期刊:
影响因子:
16.2
通讯作者:
Henderson CE
中科院分区:
文献类型:
--
作者:
Kaplan A;Spiller KJ;Towne C;Kanning KC;Choe GT;Geber A;Akay T;Aebischer P;Henderson CE
Selective neuronal loss is the hallmark of neurodegenerative diseases. In patients with amyotrophic lateral sclerosis (ALS), most motor neurons die but those innervating extraocular, pelvic sphincter and slow limb muscles exhibit selective resistance. We identified 18 genes that show >10-fold differential expression between resistant and vulnerable motor neurons. One of these, matrix metalloproteinase-9 (MMP-9), is expressed only by fast motor neurons, which are selectively vulnerable. In ALS model mice expressing mutant SOD1, reduction of MMP-9 function using gene ablation, viral gene therapy or pharmacological inhibition significantly delayed muscle denervation. In the presence of mutant SOD1, MMP-9 expressed by fast motor neurons themselves enhances activation of ER stress and is sufficient to trigger axonal die-back. These findings define MMP-9 as a candidate therapeutic target for ALS. The molecular basis of neuronal diversity thus provides novel insights into mechanisms of selective vulnerability to neurodegeneration.
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