BDNF/TrkB. T1 signaling is a novel mechanism for astrocyte morphological maturation
LM Holt, etc
bioRxiv,
2019
Brain derived neurotrophic factor (BDNF) is a critical growth factor involved in the maturation of neurons, including neuronal morphology and synapse refinement. Herein, we demonstrate astrocytes express high levels of BDNFs receptor, TrkB (in the top 20 of protein-coding transcripts), with nearly exclusive expression of the truncated isoform, TrkB.T1 which peaks in expression during astrocyte morphological maturation. Using a novel culture paradigm, we show that astrocyte morphological complexity is increased in the presence of BDNF and is dependent upon BDNF/TrkB.T1 signaling. Deletion of TrkB.T1 in vivo revealed morphologically immature astrocytes with significantly reduced volume and branching, as well as dysregulated expression of perisynaptic genes associated with mature astrocyte functions, including synaptogenic genes. Indicating a role for functional astrocyte maturation via BDNF/TrkB.T1 signaling, TrkB.T1 KO astrocytes do not support normal excitatory synaptogenesis. These data suggest a significant role for BDNF/TrkB.T1 signaling in astrocyte morphological maturation, a critical process for CNS development.
- Journal
- bioRxiv
- Year
- 2019
- Page
- doi: 10.1101/518787.
- Institute
- University of Alabama at 8 Birmingham
Referenced Products
Product | Cat No. |
---|---|
AAV-GFAP(0.7)-mCherry | VB1163 |
Vector Biolabs
293 Great Valley Parkway
Malvern, PA 19355
Email: info@vectorbiolabs.com
Phone: +1 484-325-5100
Toll-free (US Only): 877-BIO-LABS
Fax: +1 215-525-1112
Privacy Policy