RTN3 Is a Novel Cold-Induced Protein and Mediates Neuroprotective Effects of RBM3

Research output: Contribution to journalArticlepeer-review

  • External authors:
  • Amandine Bastide
  • Diego Peretti
  • Stefano Grosso
  • Ruth V. Spriggs
  • Xavier Pichon
  • Thomas Sbarrato
  • Anne Roobol
  • Jo Roobol
  • Davide Vito
  • Martin Bushell
  • Tobias von der Haar
  • C. Mark Smales
  • Giovanna R. Mallucci
  • Anne E. Willis

Abstract

Cooling and hypothermia are profoundly neuroprotective, mediated, at least in part, by the cold shock protein, RBM3. However, the neuroprotective effector proteins induced by RBM3 and the mechanisms by which mRNAs encoding cold shock proteins escape cooling-induced translational repression are unknown. Here, we show that cooling induces reprogramming of the translatome, including the upregulation of a new cold shock protein, RTN3, a reticulon protein implicated in synapse formation. We report that this has two mechanistic components. Thus, RTN3 both evades cooling-induced translational elongation repression and is also bound by RBM3, which drives the increased expression of RTN3. In mice, knockdown of RTN3 expression eliminated cooling-induced neuroprotection. However, lentivirally mediated RTN3 overexpression prevented synaptic loss and cognitive deficits in a mouse model of neurodegeneration, downstream and independently of RBM3. We conclude that RTN3 expression is a mediator of RBM3-induced neuroprotection, controlled by novel mechanisms of escape from translational inhibition on cooling.

Bibliographical metadata

Original languageEnglish
Pages (from-to)638-650
Number of pages13
JournalCurrent Biology
Volume27
Issue number5
DOIs
Publication statusPublished - 6 Mar 2017