Deoxygedunin, a natural product with potent neurotrophic activity in mice

PLoS One. 2010 Jul 13;5(7):e11528. doi: 10.1371/journal.pone.0011528.


Gedunin, a family of natural products from the Indian neem tree, possess a variety of biological activities. Here we report the discovery of deoxygedunin, which activates the mouse TrkB receptor and its downstream signaling cascades. Deoxygedunin is orally available and activates TrkB in mouse brain in a BDNF-independent way. Strikingly, it prevents the degeneration of vestibular ganglion in BDNF -/- pups. Moreover, deoxygedunin robustly protects rat neurons from cell death in a TrkB-dependent manner. Further, administration of deoxygedunin into mice displays potent neuroprotective, anti-depressant and learning enhancement effects, all of which are mediated by the TrkB receptor. Hence, deoxygedunin imitates BDNF's biological activities through activating TrkB, providing a powerful therapeutic tool for treatment of various neurological diseases.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Antidepressive Agents / metabolism
  • Antidepressive Agents / pharmacology
  • Apoptosis / drug effects
  • Brain-Derived Neurotrophic Factor / genetics
  • Cell Line
  • Cell Line, Tumor
  • Cells, Cultured
  • Hippocampus / cytology
  • Humans
  • Immunohistochemistry
  • Limonins / metabolism
  • Limonins / pharmacology*
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Mice, Mutant Strains
  • Neurons / drug effects*
  • Neurons / metabolism
  • Protein Binding
  • Protein Multimerization / drug effects
  • Protein Structure, Tertiary / physiology
  • Rats
  • Receptor, trkB / agonists
  • Receptor, trkB / metabolism


  • Antidepressive Agents
  • Brain-Derived Neurotrophic Factor
  • Limonins
  • deoxygedunin
  • Receptor, trkB