Abstract:
:The mechanisms underlying axon regeneration in mature neurons are relevant to the understanding of normal nervous system maintenance and for developing therapeutic strategies for injury. Here, we report novel pathways in axon regeneration, identified by extending our previous function-based screen using the C. elegans mechanosensory neuron axotomy model. We identify an unexpected role of the nicotinamide adenine dinucleotide (NAD+) synthesizing enzyme, NMAT-2/NMNAT, in axon regeneration. NMAT-2 inhibits axon regrowth via cell-autonomous and non-autonomous mechanisms. NMAT-2 enzymatic activity is required to repress regrowth. Further, we find differential requirements for proteins in membrane contact site, components and regulators of the extracellular matrix, membrane trafficking, microtubule and actin cytoskeleton, the conserved Kelch-domain protein IVNS-1, and the orphan transporter MFSD-6 in axon regrowth. Identification of these new pathways expands our understanding of the molecular basis of axonal injury response and regeneration.
journal_name
Elifejournal_title
eLifeauthors
Kim KW,Tang NH,Piggott CA,Andrusiak MG,Park S,Zhu M,Kurup N,Cherra SJ 3rd,Wu Z,Chisholm AD,Jin Ydoi
10.7554/eLife.39756subject
Has Abstractpub_date
2018-11-21 00:00:00issn
2050-084Xpii
39756journal_volume
7pub_type
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