Plastin 3 rescues cell surface translocation and activation of TrkB in spinal muscular atrophy

Author:

Hennlein Luisa1ORCID,Ghanawi Hanaa1ORCID,Gerstner Florian2ORCID,Palominos García Eduardo1ORCID,Yildirim Ezgi1ORCID,Saal-Bauernschubert Lena1ORCID,Moradi Mehri1ORCID,Deng Chunchu1ORCID,Klein Teresa3ORCID,Appenzeller Silke4ORCID,Sauer Markus3ORCID,Briese Michael1ORCID,Simon Christian2ORCID,Sendtner Michael1ORCID,Jablonka Sibylle1ORCID

Affiliation:

1. Institute of Clinical Neurobiology, University Hospital Würzburg 1 , Würzburg, Germany

2. Carl-Ludwig-Institute for Physiology, Leipzig University 2 , Leipzig, Germany

3. Department of Biotechnology and Biophysics, Biocenter, Julius-Maximilians-University Würzburg 3 , Würzburg, Germany

4. Comprehensive Cancer Center Mainfranken; Core Unit Bioinformatics, University Hospital Würzburg 4 , Würzburg, Germany

Abstract

Plastin 3 (PLS3) is an F-actin-bundling protein that has gained attention as a modifier of spinal muscular atrophy (SMA) pathology. SMA is a lethal pediatric neuromuscular disease caused by loss of or mutations in the Survival Motor Neuron 1 (SMN1) gene. Pathophysiological hallmarks are cellular maturation defects of motoneurons prior to degeneration. Despite the observed beneficial modifying effect of PLS3, the mechanism of how it supports F-actin-mediated cellular processes in motoneurons is not yet well understood. Our data reveal disturbed F-actin-dependent translocation of the Tropomyosin receptor kinase B (TrkB) to the cell surface of Smn-deficient motor axon terminals, resulting in reduced TrkB activation by its ligand brain-derived neurotrophic factor (BDNF). Improved actin dynamics by overexpression of hPLS3 restores membrane recruitment and activation of TrkB and enhances spontaneous calcium transients by increasing Cav2.1/2 “cluster-like” formations in SMA axon terminals. Thus, our study provides a novel role for PLS3 in supporting correct alignment of transmembrane proteins, a key mechanism for (moto)-neuronal development.

Funder

Deutsche Forschungsgemeinschaft

Picoquant

Cure SMA

SMA Europe

Publisher

Rockefeller University Press

Subject

Cell Biology

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3