Rac1 Regulates Neuronal Polarization through the WAVE Complex
Por um escritor misterioso
Descrição
Neuronal migration and axon growth, key events during neuronal development, require distinct changes in the cytoskeleton. Although many molecular regulators of polarity have been identified and characterized, relatively little is known about their physiological role in this process. To study the physiological function of Rac1 in neuronal development, we have generated a conditional knock-out mouse, in which Rac1 is ablated in the whole brain. Rac1 -deficient cerebellar granule neurons, which do not express other Rac isoforms, showed impaired neuronal migration and axon formation both in vivo and in vitro . In addition, Rac1 ablation disrupts lamellipodia formation in growth cones. The analysis of Rac1 effectors revealed the absence of the Wiskott–Aldrich syndrome protein (WASP) family verprolin-homologous protein (WAVE) complex from the plasma membrane of knock-out growth cones. Loss of WAVE function inhibited axon growth, whereas overexpression of a membrane-tethered WAVE mutant partially rescued axon growth in Rac1 -knock-out neurons. In addition, pharmacological inhibition of the WAVE complex effector Arp2/3 also reduced axon growth. We propose that Rac1 recruits the WAVE complex to the plasma membrane to enable actin remodeling necessary for axon growth.
Cortical interneuron development: a role for small Rho GTPases
Local changes in microtubule network mobility instruct neuronal polarization and axon specification
Regulation of cortical neuron polarization. Axon formation in vivo is
Local temporal Rac1-GTP nadirs and peaks restrict cell protrusions and retractions
Schizophrenia-associated Mitotic Arrest Deficient-1 (MAD1) regulates the polarity of migrating neurons in the developing neocortex
Cells, Free Full-Text
Neuronal polarization in vivo: Growing in a complex environment - ScienceDirect
The role of small GTPases in neuronal morphogenesis and polarity - Gonzalez‐Billault - 2012 - Cytoskeleton - Wiley Online Library
Rac1 Regulates Neuronal Polarization through the WAVE Complex
Development of neuronal polarity in vivo - ScienceDirect
de
por adulto (o preço varia de acordo com o tamanho do grupo)