Spectroscopic phase microscopy for quantifying hemoglobin concentrations in intact red blood cells

Area of Science:

• Biophotonics
• Cellular Imaging
• Spectroscopy

Background:

• Accurate quantification of intracellular molecules is crucial for understanding cell physiology.
• Label-free techniques reduce sample preparation complexity and potential artifacts.
• Spectroscopic methods offer molecular specificity.

Purpose of the Study:

• To develop a practical, label-free method for quantifying specific molecules in living cells.
• To demonstrate the extraction of hemoglobin concentration from individual red blood cells.
• To enable noninvasive monitoring of cellular physiological states.

Main Methods:

• Utilizing diffraction phase microscopy with multiple light wavelengths.
• Recording wavelength-dependent phase images of biological samples.
• Performing dispersion measurements on known molecular solutions for calibration.

Main Results:

• Successfully calibrated molecular dispersion for albumin and hemoglobin (Hb).
• Demonstrated extraction of Hb concentration from individual human red blood cells.
• Validated the potential for label-free molecular quantification in cellular environments.

Conclusions:

• The developed method provides a practical approach for label-free molecular quantification.
• This technique allows for noninvasive assessment of cellular physiological states.
• Diffraction phase microscopy offers a powerful tool for quantitative cellular analysis.