Computational Microscopy Reveals Compound-Specific Flickering Phenotypes of Red Blood Cells Under Flavonoid Exposure

Area of Science:

• Biophysics
• Cellular Mechanics
• Computational Microscopy

Background:

• Red blood cell (RBC) membrane flickering is a sensitive indicator of cellular mechanical properties.
• Understanding RBC mechanics is crucial for diagnosing diseases and screening drug interactions.

Purpose of the Study:

• To develop and validate a computational microscopy framework for phenotyping single-cell RBC mechanics.
• To investigate the effects of structurally distinct flavonoids on RBC membrane dynamics.

Main Methods:

• Integration of bright-field morphometry and high-speed flickering spectroscopy.
• Analysis of static shape and dynamic fluctuation spectra using Fourier-mode decomposition.
• Incubation of human erythrocytes with quercetin, apigenin, and rutin at sub-hemolytic concentrations.

Main Results:

• Flavonoid treatment induced reproducible alterations in RBC flickering spectra and mechanical parameters.
• Distinct dynamical phenotypes were observed, dependent on flavonoid structure (aglycones vs. glycosylated).
• Combined geometric and dynamic analysis enhanced discriminative power compared to individual methods.

Conclusions:

• Computational microscopy provides a sensitive, label-free method to map compound-specific RBC membrane perturbations.
• The approach can differentiate mechanical responses based on flavonoid structure, indicating differential membrane interactions.
• Potential applications include membrane biophysics research, drug-membrane interaction screening, and single-cell mechanical phenotyping.