Microtubules and Growth Cones: Motors Drive the Turn

详细信息    查看全文

• 作者：Olga I. Kahn¹ ; Peter W. Baas¹ ; ^{pbaas@drexelmed.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：microtubule ; molecular motor protein ; growth cone ; axon ; microtubule-severing protein ; actin
• 刊名：Trends in Neurosciences
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：39
• 期：7
• 页码：433-440
• 全文大小：1704 K

文摘

Navigation of the growth cone at the tip of the developing axon is crucial for the proper wiring of the nervous system. Mechanisms of actin-dependent growth cone steering, via signaling cascades, are well documented. Microtubules are also important in growth cone guidance, because their polarized invasion into the peripheral domain on one side of the growth cone is essential for it to turn in that direction. Classically, microtubules have been considered secondary players, invading the peripheral domain only where the actin cytoskeleton permits them to go. Presented here is evidence for an underappreciated mechanism by which signaling cascades can potentially affect growth cone turning, namely through regulatable forces imposed on the microtubules by molecular motor proteins.