Mechanical force is crucial in guiding axon outgrowth before and after synapse formation. This process is referred to as "stretch growth."However, how neurons transduce mechanical input into signaling pathways remains poorly understood. Another open question is how stretch growth is coupled in time with the interca-lated addition of new mass along the entire axon. Here, we demonstrate that active mechanical force gener-ated by magnetic nano-pulling induces remodeling of the axonal cytoskeleton. Specifically, the increase in the axonal density of microtubules induced by nano-pulling leads to an accumulation of organelles and signaling vesicles, which, in turn, promotes local translation by increasing the probability of assembly of the "translation factories."Modulation of axonal transport and local translation sustains enhanced axon outgrowth and synapse maturation.

Axonal plasticity in response to active forces generated through magnetic nano-pulling

Convertino, Domenica;Ghignoli, Samuele;Luin, Stefano;Marchetti, Laura;
2023

Abstract

Mechanical force is crucial in guiding axon outgrowth before and after synapse formation. This process is referred to as "stretch growth."However, how neurons transduce mechanical input into signaling pathways remains poorly understood. Another open question is how stretch growth is coupled in time with the interca-lated addition of new mass along the entire axon. Here, we demonstrate that active mechanical force gener-ated by magnetic nano-pulling induces remodeling of the axonal cytoskeleton. Specifically, the increase in the axonal density of microtubules induced by nano-pulling leads to an accumulation of organelles and signaling vesicles, which, in turn, promotes local translation by increasing the probability of assembly of the "translation factories."Modulation of axonal transport and local translation sustains enhanced axon outgrowth and synapse maturation.
2023
Settore BIO/11 - Biologia Molecolare
Settore FIS/03 - Fisica della Materia
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
CP: Cell biology; CP: Neuroscience; axon; force; local translation; magnetic nanoparticles; microtubules; outgrowth; remodeling; synapse
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/128972
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