2017
Photo-Induced Cell Damage Analysis for Single- and Multifocus Coherent Anti-Stokes Raman Scattering Microscopy
JOURNAL OF SPECTROSCOPY
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- Volume
- 2017
- Number
- First page
- ID 5725340, 8 pages
- Last page
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1155/2017/5725340
- Publisher
- HINDAWI LTD
In this study, we investigated photo-induced damage to living cells during single-and multifocus excitations for coherent anti-Stokes Raman scattering (CARS) imaging. A near-infrared pulsed laser (709 nm) was used to induce cell damage. We compared the photo-induced cell damage in the single- and the multifocus excitation schemes with the condition to obtain the same CARS signal in the same frame rate. For the evaluation of cell viability, we employed 4', 6-diamidino-2-phenylindole (DAPI) fluorophores that predominantly stained the damaged cells. One-and two-photon fluorescence of DAPI fluorophores were, respectively, excited by an ultraviolet light source and the same near-infrared light source and were monitored to evaluate the cell viability during near-infrared pulsed laser irradiation. We found lower uptake of DAPI fluorophores into HeLa cells during the multifocus excitation compared with the single- focus excitation scheme in both the one- and the two-photon fluorescence examinations. This indicates a reduction of photo-induced cell damage in the multifocus excitation. Our findings suggested that the multifocus excitation scheme is expected to be suitable for CARS microscopy in terms of minimal invasiveness.
- Link information
- ID information
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- DOI : 10.1155/2017/5725340
- ISSN : 2314-4920
- eISSN : 2314-4939
- Web of Science ID : WOS:000413048800001