期刊
BIOSENSORS & BIOELECTRONICS
卷 25, 期 5, 页码 1221-1224出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2009.09.016
关键词
Surface plasmon resonance; Biosensor; Cell volume change; Label-free detection; Real-time monitoring
类别
资金
- Kurt-Eberhard Bode Stiftung
Cell volume and its regulation is one of the key players for cellular integrity and a strong indicator for several cell pathologies. But time-resolved volume measurements of adherently grown mammalian cells using established methods, such as extracellular impedance analysis or light microscopy, are complex and time-consuming. In this study,we demonstrate that surface plasmon resonance spectroscopy (SPR) is a powerful transducer device capable of reporting volume changes of cells that are directly grown on the SPR sensor surface. The approach is label-free, non-invasive and provides an outstanding time resolution. In proof-of-principle studies we recorded the volume change of confluent MDCK 11 cells induced by hypo-or hypertonic stimulation in a time-resolved manner. Comparison of the SPR-based experiments reported here with more recent studies using different approaches suggests a direct correlation between SPR signal shift and cell volume changes. (C) 2009 Elsevier B.V. All rights reserved.
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