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Related Concept Videos

Overview of Cell Death01:30

Overview of Cell Death

Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
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Related Experiment Video

Updated: May 30, 2026

Facial Nerve Axotomy in Mice: A Model to Study Motoneuron Response to Injury
10:11

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Published on: February 23, 2015

Motoneuron programmed cell death in response to proBDNF.

Anna R Taylor1, David J Gifondorwa, Mac B Robinson

  • 1Department of Neurobiology and Anatomy, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA.

Developmental Neurobiology
|August 12, 2011
PubMed
Summary

Muscle cells secrete pro-brain-derived neurotrophic factor (proBDNF), which triggers programmed cell death (PCD) in motoneurons (MNs) via specific receptors. This study reveals a novel mechanism regulating MN survival during development.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • Motoneurons (MNs) undergo programmed cell death (PCD) during development, influenced by trophic support and activity.
  • The role of target-derived factors in negatively regulating MN survival is less understood.
  • Neurotrophin precursors interacting with p75(NTR) and sortilin receptors can induce neuronal death.

Purpose of the Study:

  • To investigate the role of muscle-derived factors in regulating motoneuron survival.
  • To determine if pro-brain-derived neurotrophic factor (proBDNF) contributes to motoneuron PCD.
  • To elucidate the mechanisms by which proBDNF affects motoneuron survival.

Main Methods:

  • In vitro culture of motoneurons.
  • Analysis of proBDNF production and secretion by muscle cells.
  • Investigating the interaction of proBDNF with p75(NTR) and sortilin receptors.
  • Assessing caspase-dependent cell death pathways.
  • In vivo studies during motoneuron development.

Main Results:

  • Muscle cells were found to produce and secrete proBDNF.
  • ProBDNF, in conjunction with p75(NTR) and sortilin, induced caspase-dependent death in cultured motoneurons.
  • Evidence suggests proBDNF regulates motoneuron PCD during development in vivo.

Conclusions:

  • Muscle-derived proBDNF acts as a death signal for motoneurons.
  • The interaction of proBDNF with p75(NTR) and sortilin mediates motoneuron apoptosis.
  • ProBDNF plays a significant role in regulating motoneuron survival during development.