Tunneling nanotubes and actin cytoskeleton dynamics in glaucoma

作     者：Kate E.Keller 

作者机构：Department of OphthalmologyDepartment of Chemical Physiology and BiochemistryOregon Health&Science UniversityPortlandORUSA 

出 版 物：《Neural Regeneration Research》 (中国神经再生研究（英文版）)

年 卷 期：2020年第15卷第11期

页      面：2031-2032页

核心收录：

学科分类：0710[理学-生物学] 1002[医学-临床医学] 1001[医学-基础医学(可授医学、理学学位)] 100212[医学-眼科学] 10[医学] 

基　　金：This work was supported by National Institute of Health RO1 grant EY019643 and EY010572(P30 Casey Eye Institute Core facility grant)and an unrestricted grant to the Casey Eye Institute from Research to Prevent Blindness New York NY USA 

主　　题：glaucoma fibers Figure 

摘      要：Glaucoma and the actin cytoskeleton:Glaucoma is an optic neuropathy,with pathophysiological changes affecting anterior and posterior tissues of the *** trabecular meshwork(TM)in the anterior segment regulates intraocular pressure(IOP),while photoreceptors in the posterior retina convert light into signals that retinal ganglion cells(RGC)transmit to the *** TM is a small,fenestrated tissue located in the anterior chamber angle,between the iris and cornea(Figure 1A1).In humans,the majority of aqueous humor fluid drains through the TM into Schlemm’s *** the outflow channels become blocked,as in glaucoma,IOP starts to increase,pushing the lens and vitreous back onto the optic ***-induced damage to the optic nerve head causes a progressive loss of RGCs and their axons,which leads to irreversible *** or pharmacological management of IOP prevents RGC damage in glaucoma *** pharmacological therapies either reduce production of aqueous humor fluid,or increase aqueous drainage via the TM or the uveoscleral outflow ***,a new class of glaucoma therapies targeting the actin cytoskeleton were approved by the Food and Drug *** are known as the Rho kinase inhibitors,and they act on the Rho/Rho-associated protein kinase signaling pathway to disassemble actin stress fibers in TM and Schlemm’s canal cells(Rao et al.,2017;Lin et al.,2018).While the molecular details are only partially understood,perturbing the actomyosin system can alter cell shape,volume,contractility,and adhesion of cells to extracellular matrix(Tian et al.,2009),which in turn allows greater aqueous outflow and a reduction in *** addition to forming stress fibers,filamentous actin assembles into actin bundles,which are a major component of filopodia,long finger-like projections that emanate from the cell surface,as well as the related cellular protrusions known as tunneling nanotubes(TNTs).