中国神经再生研究(英文版) ›› 2025, Vol. 20 ›› Issue (3): 715-724.doi: 10.4103/NRR.NRR-D-23-02000

• 综述:退行性病与再生 • 上一篇    下一篇

靶向TrkB-PSD-95偶联减轻神经系统疾病

  

  • 出版日期:2025-03-15 发布日期:2024-06-25

Targeting TrkB–PSD-95 coupling to mitigate neurological disorders

Xin Yang1, *, Yu-Wen Alvin Huang1, 2, 3, *, John Marshall1, *   

  1. 1 Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, USA; 2 Department of Neurology, Warren Alpert Medical School of Brown University, Providence, RI, USA; 3 Center for Translational Neuroscience, Robert J. and Nancy D. Carney Institute for Brain Science and Brown Institute for Translational Science, Brown University, Providence, RI, USA
  • Online:2025-03-15 Published:2024-06-25
  • Contact: Xin Yang, PhD, xin_yang@brown.edu; Yu-Wen Alvin Huang, PhD, alvinhuang@brown.edu; John Marshall, PhD, John_Marshall@brown.edu.
  • Supported by:
    This work was supported by Postdoc Fellowship from the Foundation for Angelman Syndrome Therapeutics (FT2022-005 to JM, PD2023-001 to XY, and FT2024-001 to YAH), and STTR R41 MH118747 (to JM).

摘要:

Abstract: Tropomyosin receptor kinase B (TrkB) signaling plays a pivotal role in dendritic growth and dendritic spine formation to promote learning and memory. The activity-dependent release of brain-derived neurotrophic factor at synapses binds to pre- or postsynaptic TrkB resulting in the strengthening of synapses, reflected by long-term potentiation. Postsynaptically, the association of postsynaptic density protein-95 with TrkB enhances phospholipase Cγ-Ca2+/calmodulin-dependent protein kinase II and phosphatidylinositol 3-kinase-mechanistic target of rapamycin signaling required for long-term potentiation. In this review, we discuss TrkB-postsynaptic density protein-95 coupling as a promising strategy to magnify brain-derived neurotrophic factor signaling towards the development of novel therapeutics for specific neurological disorders. A reduction of TrkB signaling has been observed in neurodegenerative disorders, such as Alzheimer’s disease and Huntington’s disease, and enhancement of postsynaptic density protein-95 association with TrkB signaling could mitigate the observed deficiency of neuronal connectivity in schizophrenia and depression. Treatment with brain-derived neurotrophic factor is problematic, due to poor pharmacokinetics, low brain penetration, and side effects resulting from activation of the p75 neurotrophin receptor or the truncated TrkB.T1 isoform. Although TrkB agonists and antibodies that activate TrkB are being intensively investigated, they cannot distinguish the multiple human TrkB splicing isoforms or cell type-specific functions. Targeting TrkB–postsynaptic density protein-95 coupling provides an alternative approach to specifically boost TrkB signaling at localized synaptic sites versus global stimulation that risks many adverse side effects.

Key words: Angelman syndrome, autism, brain-derived neurotrophic factor, depression, neurodegenerative disorder, neurodevelopmental disorder, postsynaptic density protein-95, synaptic plasticity, TrkB