HAP1 is required for endocytosis and signalling of BDNF and its receptors in neurons
| Autor: | Miao Yang, Yoon Lim, Linda Lin-yan Wu, Ying Sun, Damien J. Keating, Xiao-Jiang Li, Larisa Bobrovskaya, Xin-Fu Zhou, Si Chen, Swarna Lekha Vijayaraj |
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| Přispěvatelé: | Lim, Yoon, Wu, Linda Lin Yan, Chen, Si, Sun, Ying, Vijayaraj, Swarna Lekha, Yang, Miao, Bobrovskaya, Larisa, Keating, Damien, Li, Xiao Jiang, Zhou, Xin-Fu |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
MAPK/ERK pathway proliferation Neuroscience (miscellaneous) Mice Transgenic Nerve Tissue Proteins Tropomyosin receptor kinase B Tropomyosin receptor kinase A Endocytosis Article HAP1 Mice 03 medical and health sciences Cellular and Molecular Neuroscience Animals Humans Receptor trkB endocytosis Receptor P75NTR Protein kinase B Cells Cultured Mice Knockout Neurons Brain-derived neurotrophic factor Chemistry Brain-Derived Neurotrophic Factor TrkB Cell biology Mice Inbred C57BL HEK293 Cells 030104 developmental biology BDNF Animals Newborn Neurology nervous system Signal transduction Neuroscience Signal Transduction |
| Popis: | When BDNF binds to its receptors, TrkB and p75NTR, the BDNF-receptor complex is endocytosed and trafficked to the cell body for downstream signal transduction, which plays a critical role in neuronal functions. Huntingtin-associated protein 1 (HAP1) is involved in trafficking of vesicles intracellularly and also interacts with several membrane proteins including TrkB. Although it has been known that HAP1 has functions in vesicular trafficking and receptor stabilisation, it is not yet established whether HAP1 has a role in BDNF and its receptor endocytosis. In the present study, we found that HAP1 is in an interacting complex with p75NTR,TrkB and BDNF, especially newly endocytosed BDNF.BDNF and TrkB internalisation is abolished in HAP1 knock-out (KO) cortical neurons. TrkB downstream signalling pathways such as ERK, Akt and PLCγ-1 are also impaired in HAP1 KO cortical neurons upon BDNF stimulation. Proliferation of cerebellar granule cells is also impaired in cell culture and cerebellum of HAP1 KO mice. Our findings suggest that HAP1 may play a key role in BDNF and its receptor endocytosis and may promote neuronal survival and proliferation. Refereed/Peer-reviewed |
| Databáze: | OpenAIRE |
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