Rizzelli Francesca, Malabarba Maria Grazia, Sigismund Sara, Mapelli Marina
IEO, Istituto Europeo di Oncologia IRCCS, Milan, Italy.
Dipartimento di Oncologia ed Emato-oncologia, Università degli Studi di Milano, Milan, Italy.
Open Biol. 2020 Mar;10(3):190314. doi: 10.1098/rsob.190314. Epub 2020 Mar 18.
Mitotic progression is orchestrated by morphological and mechanical changes promoted by the coordinated activities of the microtubule (MT) cytoskeleton, the actin cytoskeleton and the plasma membrane (PM). MTs assemble the mitotic spindle, which assists sister chromatid separation, and contact the rigid and tensile actomyosin cortex rounded-up underneath the PM. Here, we highlight the dynamic crosstalk between MTs, actin and cell membranes during mitosis, and discuss the molecular connections between them. We also summarize recent views on how MT traction forces, the actomyosin cortex and membrane trafficking contribute to spindle positioning in isolated cells in culture and in epithelial sheets. Finally, we describe the emerging role of membrane trafficking in synchronizing actomyosin tension and cell shape changes with cell-substrate adhesion, cell-cell contacts and extracellular signalling events regulating proliferation.
有丝分裂进程由微管(MT)细胞骨架、肌动蛋白细胞骨架和质膜(PM)的协同活动所促进的形态和机械变化精心编排。微管组装有丝分裂纺锤体,辅助姐妹染色单体分离,并与在质膜下方聚集的刚性且具张力的肌动球蛋白皮质层相接触。在此,我们着重介绍有丝分裂期间微管、肌动蛋白和细胞膜之间的动态相互作用,并讨论它们之间的分子联系。我们还总结了关于微管牵引力、肌动球蛋白皮质层和膜运输如何有助于在培养的分离细胞以及上皮层中纺锤体定位的最新观点。最后,我们描述了膜运输在使肌动球蛋白张力和细胞形状变化与细胞 - 底物黏附、细胞 - 细胞接触以及调节增殖的细胞外信号事件同步方面所起的新作用。