BDNF-induced recruitment of TrkB receptor into neuronal lipid rafts: Roles in synaptic modulation

Shingo Suzuki, Tadahiro Numakawa, Kazuhiro Shimazu, Hisatsugu Koshimizu, Tomoko Hara, Hiroshi Hatanaka, Lin Mei, Bai Lu, Masami Kojima

Research output: Contribution to journalArticlepeer-review

162 Citations (Scopus)


Brain-derived neurotrophic factor (BDNF) plays an important role in synoptic plasticity but the underlying signaling mechanisms remain unknown. Here, we show that BDNF rapidly recruits full-length TrkB (TrkB-FL) receptor into cholesterol-rich lipid rafts from nonraft regions of neuronal plasma membranes. Translocation of TrkB-FL was blocked by Trk inhibitors, suggesting a role of TrkB tyrosine kinase in the translocation. Disruption of lipid rafts by depleting cholesterol from cell surface blocked the ligand-induced translocation. Moreover, disruption of lipid rafts prevented potentiating effects of BDNF on transmitter release in cultured neurons and synoptic response to tetanus in hippocampal slices. In contrast, lipid rafts are not required for BDNF regulation of neuronal survival. Thus, ligand-induced TrkB translocation into lipid rafts may represent a signaling mechanism selective for synoptic modulation by BDNF in the central nervous system.

Original languageEnglish
Pages (from-to)1205-1215
Number of pages11
JournalJournal of Cell Biology
Issue number6
Publication statusPublished - 20-12-2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Cell Biology


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