Alpha actinin-1 regulates cell-matrix adhesion organization in keratinocytes: consequences for skin cell motility.

Alpha actinin-1 regulates cell-matrix adhesion organization in keratinocytes: consequences for skin cell motility.
复制标题

DOI:
10.1038/jid.2014.505
复制
发表时间:
2015-04
影响因子:
6.5
通讯作者:
Jones, Jonathan C. R.
Jones, Jonathan C. R.
中科院分区:
医学1区
文献类型:
--
作者:
Hamill, Kevin J.;Hiroyasu, Sho;Colburn, Zachary T.;Ventrella, Rosa V.;Hopkinson, Susan B.;Skalli, Omar;Jones, Jonathan C. R.

文献摘要

参考文献

被引文献

相似文献

角质形成细胞在伤口愈合中的迁移需要细胞的运动机制、细胞骨架和基质粘附的协调活动。在这项研究中,我们评估了α辅肌动蛋白-1(ACTN 1),角质形成细胞中表达的两种α辅肌动蛋白亚型之一,通过shRNA介导的敲除方法在皮肤细胞迁移中的作用。缺乏ACTN 1的角质形成细胞表现出肌动蛋白细胞骨架组织的变化,前后极性的丧失和板层脂质动力学受损。它们还显示异常的定向运动性,并且比它们的野生型对应物移动得更慢。此外,它们具有异常排列的基质粘附位点。具体而言,ACTN 1敲低角质形成细胞中的粘着斑没有组织成不同的实体。相反,粘着斑蛋白在肌动蛋白皮质纤维的下方排列成一个圆圈。在相同的细胞中,半桥粒蛋白以猫爪图案排列,更典型的融合、静止细胞,并且与对照角质形成细胞相比,在敲低细胞中β4整联蛋白动力学降低。总之,我们的数据表明,ACTN 1通过调节肌动蛋白细胞骨架、粘着斑和半桥粒蛋白复合物的组织,从而调节细胞速度、板层脂质动力学和定向迁移来确定角质形成细胞的运动性的机制。
The migration of keratinocytes in wound healing requires coordinated activities of the motility machinery of a cell, the cytoskeleton and matrix adhesions. In this study we assessed the role of alpha actinin-1 (ACTN1), one of the two alpha actinin isoforms expressed in keratinocytes, in skin cell migration via an shRNA-mediated knockdown approach. Keratinocytes deficient in ACTN1 exhibit changes in their actin cytoskeleton organization, a loss in front-rear polarity and impaired lamellipodial dynamics. They also display aberrant directed motility and move slower than their wild-type counterparts. Moreover, they have abnormally arranged matrix adhesion sites. Specifically, the focal adhesions in ACTN1 knockdown keratinocytes are not organized as distinct entities. Rather, focal adhesion proteins are arranged in a circle subjacent to cortical fibers of actin. In the same cells, hemidesmosome proteins arrange in cat paw patterns, more typical of confluent, stationary cells and β4 integrin dynamics are reduced in knockdown cells compared with control keratinocytes. In summary, our data suggest a mechanism by which ACTN1 determines the motility of keratinocytes by regulating the organization of the actin cytoskeleton, focal adhesion and hemidesmosome proteins complexes, thereby modulating cell speed, lamellipodial dynamics and directed migration.
整联蛋白α3β1在局灶性粘连中的不同功能和α6β4/bullous子型抗原抗原在新的稳定锚定接触(SAC)的角质形成细胞中:与Hemidesmosmosys的关系。
DOI: 10.1083/jcb.111.6.3141
发表时间: 1990-12
影响因子: 7.8
作者:
Carter, W G;Kaur, P;Gil, S G;Gahr, P J;Wayner, E A
通讯作者: Wayner, E A
DOI: 10.1038/jid.2009.439
发表时间: 2010-06
期刊: The Journal of investigative dermatology
影响因子: --
作者:
通讯作者: --
DOI: 10.1074/jbc.m112.401364
发表时间: 2012-10-12
影响因子: 4.8
作者:
Khurana, Simran;Chakraborty, Sharmistha;Kao, Hung-Ying
通讯作者: Kao, Hung-Ying
DOI: 10.1242/jcs.115063
发表时间: 2013-01-01
影响因子: 4
作者:
Kovac, Bianca;Teo, Jessica L.;Vallenius, Tea
通讯作者: Vallenius, Tea
DOI: 10.1038/jid.2011.297
发表时间: 2012-02-01
影响因子: 6.5
作者:
Hamill, Kevin J.;Hopkinson, Susan B.;Jones, Jonathan C. R.
通讯作者: Jones, Jonathan C. R.