MFN2 agonists reverse mitochondrial defects in preclinical models of Charcot-Marie-Tooth disease type 2A.

MFN2 agonists reverse mitochondrial defects in preclinical models of Charcot-Marie-Tooth disease type 2A.
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DOI:
10.1126/science.aao1785
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发表时间:
2018-04-20
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Dorn GW 2nd
Dorn GW 2nd
中科院分区:
其他
文献类型:
--
作者:
Rocha AG;Franco A;Krezel AM;Rumsey JM;Alberti JM;Knight WC;Biris N;Zacharioudakis E;Janetka JW;Baloh RH;Kitsis RN;Mochly-Rosen D;Townsend RR;Gavathiotis E;Dorn GW 2nd

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Mitofusins (Mfn) promote fusion-mediated mitochondrial content exchange and subcellular trafficking. Mutations in Mfn2 cause neurodegenerative Charcot Marie Tooth disease type 2A (CMT2A). Here we show that Mfn2 activity can be determined by Met376 and His380 interactions with Asp725 and Leu727 and controlled by PINK1 kinase-mediated phosphorylation of adjacent Mfn2 Ser378. Small molecule mimics of the peptide-peptide interface of Mfn2 disrupted this interaction, allosterically activating Mfn2 and promoting mitochondrial fusion. These first-in-class mitofusin agonists overcame dominant mitochondrial defects provoked in cultured neurons by CMT2A mutants Mfn2 Arg94Gln and Thr105Met, as evidenced by improved mitochondrial dysmotility, fragmentation, depolarization, and clumping. A mitofusin agonist normalized axonal mitochondrial trafficking within sciatic nerves of Mfn2 Thr105Met mice, promising a therapeutic approach for CMT2A and other untreatable diseases of impaired neuronal mitochondrial dynamism/trafficking.
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