Netrin-1 acts as a survival factor via its receptors UNC5H and DCC

EMBO J. 2001 Jun 1;20(11):2715-22. doi: 10.1093/emboj/20.11.2715.

Abstract

The membrane receptors DCC and UNC5H have been shown to be crucial for axon guidance and neuronal migration by acting as receptors for netrin-1. DCC has also been proposed as a dependence receptor inducing apoptosis in cells that are beyond netrin-1 availability. Here we show that the netrin-1 receptors UNC5H (UNC5H1, UNC5H2, UNC5H3) also act as dependence receptors. UNC5H receptors induce apoptosis, but this effect is blocked in the presence of netrin-1. Moreover, we demonstrate that UNC5H receptors are cleaved in vitro by caspase in their intracellular domains. This cleavage may lead to the exposure of a fragment encompassing a death domain required for cell death induction in vivo. Finally, we present evidence that during development of the nervous system, the presence of netrin-1 is crucial to maintain survival of UNC5H- and DCC-expressing neurons, especially in the ventricular zone of the brainstem. Altogether, these results argue for a role of netrin-1 during the development of the nervous system, not only as a guidance cue but as a survival factor via its receptors DCC and UNC5H.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Apoptosis / physiology*
  • Base Sequence
  • Brain Stem / cytology
  • Brain Stem / physiology
  • Caspases / metabolism
  • Cell Adhesion Molecules / drug effects
  • Cell Adhesion Molecules / genetics
  • Cell Adhesion Molecules / physiology*
  • Cell Death
  • Cell Line
  • Cell Survival / physiology*
  • DCC Receptor
  • DNA Primers
  • Humans
  • Mice
  • Mice, Knockout
  • Molecular Sequence Data
  • Mutagenesis, Site-Directed
  • Nerve Growth Factors / deficiency
  • Nerve Growth Factors / genetics
  • Nerve Growth Factors / pharmacology
  • Nerve Growth Factors / physiology*
  • Netrin Receptors
  • Netrin-1
  • Neurons / cytology
  • Neurons / physiology
  • Receptors, Cell Surface / drug effects
  • Receptors, Cell Surface / genetics
  • Receptors, Cell Surface / physiology*
  • Transfection
  • Tumor Suppressor Proteins*

Substances

  • Cell Adhesion Molecules
  • DCC Receptor
  • DCC protein, human
  • DNA Primers
  • Dcc protein, mouse
  • NTN1 protein, human
  • Nerve Growth Factors
  • Netrin Receptors
  • Ntn1 protein, mouse
  • Receptors, Cell Surface
  • Tumor Suppressor Proteins
  • Unc5A protein, mouse
  • Unc5h2 protein, mouse
  • Netrin-1
  • Caspases