Sensing minute changes in biological cell monolayers with THz differential time-domain spectroscopy |
| |
Authors: | Liu Hai-Bo Plopper George Earley Sarah Chen Yunqing Ferguson Bradley Zhang X-C |
| |
Institution: | Center for Terahertz Research, CII 9009, Rensselaer Polytechnic Institute, Troy, NY 12180, USA. |
| |
Abstract: | We used terahertz differential time-domain spectroscopy (THz-DTDS) to measure minute changes of bovine lung microvessel endothelial cells (BLMVEC) in response to vascular endothelial growth factor (VEGF). These changes were reflected by alterations in THz wave attenuations and THz dielectric properties of the treated cells. The VEGF-induced THz attenuations of cell monolayers correlated well with changes in transendothelial resistance, as measured using electric cell-substrate impedance sensing (ECIS). However, the morphological differences that gave rise to these changes were not observed with standard optical phase contrast microscopy. We conclude that THz-DTDS is a highly sensitive, non-invasive, powerful new tool to measure minute changes in the morphology of live, cultured cell monolayers. This method enables spectroscopic investigations of cells in the THz band, providing information unavailable through other conventional methods such as optical phase contrast microscopy and ECIS. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|