Building Accurate Intracellular Polarity Maps through Multiparametric Microscopy

Area of Science:

• Cell Biology
• Biophysics
• Microscopy

Background:

• Intracellular polarity is a crucial physiological parameter.
• Dysregulation of intracellular polarity is linked to diseases like cancer and Alzheimer's.
• Accurate methods for mapping intracellular polarity are needed.

Purpose of the Study:

• To present a novel, accurate method for generating intracellular polarity maps.
• To demonstrate the utility of fluorescence microscopy in quantitative polarity measurements.
• To provide a tool for studying diseases associated with polarity changes.

Main Methods:

• Utilized potent fluorescence microscopy techniques with luminescent probes.
• Selected probes with emission properties (spectral shifts, luminescence lifetime) sensitive to microenvironment polarity.
• Developed a multilinear calibration model correlating polarity, spectral shift, and luminescence lifetime.
• Employed multidimensional luminescence microscopy to acquire simultaneous spectral shift and lifetime images.
• Interpolated microscopy data within a 3D calibration space for quantitative mapping.

Main Results:

• Generated accurate and quantitative intracellular polarity maps.
• The method provides an error-free 3D calibration space for reliable data interpolation.
• Simultaneous acquisition of spectral shift and luminescence lifetime images was achieved.
• Demonstrated the effectiveness of the developed calibration and interpolation approach.

Conclusions:

• The developed method offers a precise and quantitative approach to map intracellular polarity.
• This technique has significant potential for advancing research in cancer, Alzheimer's, and other diseases.
• Accurate intracellular polarity mapping can provide new insights into complex physiological mechanisms.