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Open AccessArticle

Rac1 Promotes Cell Motility by Controlling Cell Mechanics in Human Glioblastoma

by Jing Xu 1,2, Nicola Galvanetto 1, Jihua Nie 1,3, Yili Yang 2,* and Vincent Torre 1,2,3,4,*
International School for Advanced Studies (SISSA), 34136 Trieste, Italy
Joint Laboratory of Biophysics and Translational Medicine, Suzhou Institute of Systems Medicine (ISM)- International School for Advanced Studies (SISSA), Suzhou 215123, China
School of Radiation Medicine and Protection, State Key Laboratory of Radiation Medicine and Protection Medical College of Soochow University, Suzhou 215123, China
Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo 315201, China
Authors to whom correspondence should be addressed.
Cancers 2020, 12(6), 1667;
Received: 21 May 2020 / Accepted: 2 June 2020 / Published: 23 June 2020
The failure of existing therapies in treating human glioblastoma (GBM) mostly is due to the ability of GBM to infiltrate into healthy regions of the brain; however, the relationship between cell motility and cell mechanics is not well understood. Here, we used atomic force microscopy (AFM), live-cell imaging, and biochemical tools to study the connection between motility and mechanics in human GBM cells. It was found thatRac1 inactivation by genomic silencing and inhibition with EHT 1864 reduced cell motility, inhibited cell ruffles, and disrupted the dynamics of cytoskeleton organization and cell adhesion. These changes were correlated with abnormal localization of myosin IIa and a rapid suppression of the phosphorylation of Erk1/2. At the same time, AFM measurements of the GBM cells revealed a significant increase in cell elasticity and viscosity following Rac1 inhibition. These results indicate that mechanical properties profoundly affect cell motility and may play an important role in the infiltration of GBM. It is conceivable that the mechanical characters might be used as markers for further surgical and therapeutical interventions. View Full-Text
Keywords: Rac1; cell motility; cell mechanics; cytoskeleton; cell adhesion Rac1; cell motility; cell mechanics; cytoskeleton; cell adhesion
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MDPI and ACS Style

Xu, J.; Galvanetto, N.; Nie, J.; Yang, Y.; Torre, V. Rac1 Promotes Cell Motility by Controlling Cell Mechanics in Human Glioblastoma. Cancers 2020, 12, 1667.

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