Design of a Multiparametric Biosensing Platform and Its Validation in a Study on Spontaneous Cell Detachment from...

Area of Science:

• Biosensor technology
• Analytical chemistry
• Biophysics

Background:

• Label-free biosensing is crucial for real-time biological analysis.
• Multiparametric sensing offers enhanced specificity and sensitivity.
• Existing devices often lack the ability to compare orthogonal sensing principles.

Purpose of the Study:

• To develop and validate a single-chip bioanalytical sensor integrating three distinct transducer principles.
• To enable parallel or simultaneous measurements for orthogonal sensing.
• To compare the performance of impedance spectroscopy, quartz-crystal microbalance with dissipation monitoring (QCM-D), and heat transfer methods for bioanalytical applications.

Main Methods:

• Integration of impedance spectroscopy, QCM-D, and heat transfer methods onto a single chip.
• Development of protocols for parallel and simultaneous measurements.
• Validation using eukaryotic cell detachment studies and yeast strain differentiation.

Main Results:

• Demonstrated parallel and simultaneous operation of the three sensing modalities with no crosstalk.
• Successfully monitored eukaryotic cell detachment using all three methods.
• Differentiated yeast strains based on flocculation genes and monitored yeast proliferation over time.

Conclusions:

• The developed sensor enables direct comparison of orthogonal label-free sensing principles.
• This multiparametric approach enhances bioanalytical capabilities for applications like cell detachment studies and microbial identification.
• The sensor platform facilitates the selection of the optimal sensing strategy for specific bioanalytical challenges.