A glycolytic shift in Schwann cells supports injured axons.

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 Neurosci

journal_title

Nature neuroscience

authors

Babetto E,Wong KM,Beirowski B

doi

10.1038/s41593-020-0689-4

subject

Has Abstract

pub_date

2020-10-01 00:00:00

pages

1215-1228

issue

10

eissn

1097-6256

issn

1546-1726

pii

10.1038/s41593-020-0689-4

journal_volume

23

pub_type

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