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Journal of Biomolecular Screening
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Dynamic Monitoring of Cell Adhesion and Spreading on Microelectronic Sensor Arrays

Josephine M. Atienza

Jenny Zhu

Xiaobo Wang

Xiao Xu

Yama Abassi

Cellular interaction with and adhesion on different biological surfaces is a dynamic and integrated process requiring the participation of specialized cell surface receptors, structural proteins, signaling proteins, and the cellular cytoskeleton. In this report, the authors describe a label-free and real-time method for measuring and monitoring cell adhesion on special microplates integrated with electronic cell sensor arrays. These plates were used in conjunction with the real-time cell electronic sensing (RT-CESTM) system to dynamically and quantitatively monitor the specific interaction of fibroblasts with extracellular matrix (ECM) proteins and compared with standard adhesion techniques. Cell adhesion on ECM-coated cell sensor arrays is dependent on the concentration of ECMproteins coated and is inhibited by agents that disrupt the interaction of ECM with cell surface receptors. Furthermore, the authors demonstrate that the integrity of the actin cytoskeleton is required for productive cell adhesion and spreading on ECM-coated microelectronic sensors. Confirming earlier results, it is shown that interfering with Src expression or activity, via siRNA or small molecule, results in the disruption of adhesion and spreading of Bx PC3cells. The results indicate that the RT-CES system offers a convenient and quantitative means of assessing the kinetics of cell adhesion in a high-throughput manner.

Key Words: cell adhesion • assay • dynamic • high throughput • label free

This version was published on December 1, 2005

Journal of Biomolecular Screening, Vol. 10, No. 8, 795-805 (2005)
DOI: 10.1177/1087057105279635
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