Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells

Neuron. 2022 Aug 17;110(16):2625-2645.e7. doi: 10.1016/j.neuron.2022.06.002. Epub 2022 Jun 28.


Injured neurons in the adult mammalian central nervous system often die and seldom regenerate axons. To uncover transcriptional pathways that could ameliorate these disappointing responses, we analyzed three interventions that increase survival and regeneration of mouse retinal ganglion cells (RGCs) following optic nerve crush (ONC) injury, albeit not to a clinically useful extent. We assessed gene expression in each of 46 RGC types by single-cell transcriptomics following ONC and treatment. We also compared RGCs that regenerated with those that survived but did not regenerate. Each intervention enhanced survival of most RGC types, but type-independent axon regeneration required manipulation of multiple pathways. Distinct computational methods converged on separate sets of genes selectively expressed by RGCs likely to be dying, surviving, or regenerating. Overexpression of genes associated with the regeneration program enhanced both survival and axon regeneration in vivo, indicating that mechanistic analysis can be used to identify novel therapeutic strategies.

Keywords: CNTF; Pten; Socs3; Wt1; axonal regeneration; single-cell RNA sequencing.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Axons / metabolism
  • Cell Survival / genetics
  • Mammals
  • Mice
  • Nerve Regeneration / genetics
  • Optic Nerve Injuries* / genetics
  • Optic Nerve Injuries* / metabolism
  • Retinal Ganglion Cells* / physiology