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2014 ; 56
(ä): 359-67
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Surface plasmon resonance fiber sensor for real-time and label-free monitoring of
cellular behavior
#MMPMID24549115
Shevchenko Y
; Camci-Unal G
; Cuttica DF
; Dokmeci MR
; Albert J
; Khademhosseini A
Biosens Bioelectron
2014[Jun]; 56
(ä): 359-67
PMID24549115
show ga
This paper reports on the application of an optical fiber biosensor for real-time
analysis of cellular behavior. Our findings illustrate that a fiber sensor
fabricated from a traditional telecommunication fiber can be integrated into
conventional cell culture equipment and used for real-time and label-free
monitoring of cellular responses to chemical stimuli. The sensing mechanism used
for the measurement of cellular responses is based on the excitation of surface
plasmon resonance (SPR) on the surface of the optical fiber. In this proof of
concept study, the sensor was utilized to investigate the influence of a number
of different stimuli on cells-we tested the effects of trypsin, serum and sodium
azide. These stimuli induced detachment of cells from the sensor surface, uptake
of serum and inhibition of cellular metabolism, accordingly. The effects of
different stimuli were confirmed with alamar blue assay, phase contrast and
fluorescence microscopy. The results indicated that the fiber biosensor can be
successfully utilized for real-time and label-free monitoring of cellular
response in the first 30 min following the introduction of a stimulus.
Furthermore, we demonstrated that the optical fiber biosensors can be easily
regenerated for repeated use, proving this platform as a versatile and
cost-effective sensing tool.