Related Experiment Video
Updated: Jun 27, 2026
13:46
An Improved Protocol to Purify and Directly Mono-Biotinylate Recombinant BDNF in a Tube for Cellular Trafficking Studies in Neurons
Published on: July 11, 2020
Distinct subcellular localization of BDNF transcripts in cultured hypothalamic neurons and modification by neuronal
Esteban Enrique Aliaga1, I Mendoza, L Tapia-Arancibia
1Departamento de Fisiología, Universidad de Valparaíso, Playa Ancha, Valparaiso, Chile. esteban.aliaga@uv.cl
Journal of Neural Transmission (Vienna, Austria : 1996)
|December 17, 2008
Summary
Brain-derived neurotrophic factor (BDNF) mRNA localization in hypothalamic neurons is regulated by N-methyl-D-aspartate (NMDA) receptors. NMDA receptor activity inhibits dendritic transport of BDNF transcripts, influencing neuronal function.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Brain-derived neurotrophic factor (BDNF) plays crucial roles in neuronal survival, growth, and plasticity.
- Understanding the subcellular localization of BDNF mRNA is essential for elucidating its local synthesis and function within neurons.
Purpose of the Study:
- To investigate the subcellular localization of total BDNF mRNA (panBDNF) and its specific 5' exon transcripts in cultured hypothalamic neurons.
- To determine the influence of N-methyl-D-aspartate (NMDA) receptor activity and K(+) depolarization on BDNF mRNA dendritic transport.
Main Methods:
- Utilized non-isotopic in situ hybridization with DIG-labeled exon-specific riboprobes.
- Combined with immunocytochemical labeling for MAP2 (neuronal marker) and GFAP (astrocyte marker).
- Examined effects of NMDA, MK-801 (NMDA antagonist), and K(+) depolarization on BDNF mRNA distribution.
Main Results:
- Under basal conditions, panBDNF mRNA was found in neuronal soma and proximal dendrites; transcripts IV and VI were strongly expressed.
- NMDA treatment reduced dendritic localization of panBDNF and transcript VI mRNA.
- MK-801 treatment increased dendritic labeling of all transcripts, while K(+) depolarization extended panBDNF and transcript VI mRNA dendritic localization.
Conclusions:
- BDNF mRNA transcripts exhibit distinct subcellular localization patterns in hypothalamic neurons.
- NMDA receptor activity exerts an inhibitory control over the dendritic transport of specific BDNF transcripts.
- These findings suggest a novel NMDA-receptor-dependent mechanism regulating local BDNF synthesis in hypothalamic neurons.
