Abstract:
:Axon degeneration is a hallmark of many neurodegenerative disorders. The current assumption is that the decision of injured axons to degenerate is cell-autonomously regulated. Here we show that Schwann cells (SCs), the glia of the peripheral nervous system, protect injured axons by virtue of a dramatic glycolytic upregulation that arises in SCs as an inherent adaptation to axon injury. This glycolytic response, paired with enhanced axon-glia metabolic coupling, supports the survival of axons. The glycolytic shift in SCs is largely driven by the metabolic signaling hub, mammalian target of rapamycin complex 1, and the downstream transcription factors hypoxia-inducible factor 1-alpha and c-Myc, which together promote glycolytic gene expression. The manipulation of glial glycolytic activity through this pathway enabled us to accelerate or delay the degeneration of perturbed axons in acute and subacute rodent axon degeneration models. Thus, we demonstrate a non-cell-autonomous metabolic mechanism that controls the fate of injured axons.
journal_name
Nat Neuroscijournal_title
Nature neuroscienceauthors
Babetto E,Wong KM,Beirowski Bdoi
10.1038/s41593-020-0689-4subject
Has Abstractpub_date
2020-10-01 00:00:00pages
1215-1228issue
10eissn
1097-6256issn
1546-1726pii
10.1038/s41593-020-0689-4journal_volume
23pub_type
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