Počet záznamů: 1  

Axon tension regulates fasciculation/defasciculation through the control of axon shaft zippering

  1. 1.
    0476688 - FGU-C 2018 RIV GB eng J - Článek v odborném periodiku
    Šmít, Daniel - Fouquet, C. - Pincet, F. - Zápotocký, Martin - Trembleau, A.
    Axon tension regulates fasciculation/defasciculation through the control of axon shaft zippering.
    eLife. Roč. 6, Apr 19 (2017), č. článku e19907. ISSN 2050-084X
    Grant CEP: GA ČR(CZ) GA14-16755S; GA MŠk(CZ) 7AMB12FR002
    Institucionální podpora: RVO:67985823
    Klíčová slova: biophysics * cell adhesion * coarsening * developmental biology * mathematical model * mechanical tension * axon guidance
    Kód oboru RIV: BO - Biofyzika
    Obor OECD: Biophysics
    Impakt faktor: 7.616, rok: 2017

    While axon fasciculation plays a key role in the development of neural networks, very little is known about its dynamics and the underlying biophysical mechanisms. In a model system composed of neurons grown ex vivo from explants of embryonic mouse olfactory epithelia, we observed that axons dynamically interact with each other through their shafts, leading to zippering and unzippering behavior that regulates their fasciculation. Taking advantage of this new preparation suitable for studying such interactions, we carried out a detailed biophysical analysis of zippering, occurring either spontaneously or induced by micromanipulations and pharmacological treatments. We show that zippering arises from the competition of axon-axon adhesion and mechanical tension in the axons, and provide the first quantification of the force of axon-axon adhesion. Furthermore, we introduce a biophysical model of the zippering dynamics, and we quantitatively relate the individual zipper properties to global characteristics of the developing axon network. Our study uncovers a new role of mechanical tension in neural development: the regulation of axon fasciculation.
    Trvalý link: http://hdl.handle.net/11104/0273135