gDAIS: A Global Analysis Application for Obtaining Confidence in FLIM

Area of Science:

• Biophysics
• Cellular Biology
• Microscopy Techniques

Background:

• Fluorescence Lifetime Imaging Microscopy (FLIM) is crucial for studying cellular environments and biomolecular interactions.
• Conventional FLIM analysis methods like multi-exponential fitting and phasor analysis can be skewed by low photon counts.
• Accurate quantification of biomolecular states and Förster resonance energy transfer (FRET) requires advanced analytical approaches.

Purpose of the Study:

• To introduce a novel global decay-associated analysis method for FLIM data.
• To present the global Decay-Associated Image Software (gDAIS) for enhanced FLIM data processing.
• To improve the accuracy and statistical rigor of FLIM analysis for cellular studies.

Main Methods:

• Implementation of a global decay-associated analysis optimizing nonlinear parameters across the entire image.
• Development of the gDAIS software incorporating a fast regression method.
• Generation of amplitude images and associated uncertainty maps from FLIM data.

Main Results:

• Global analysis provides statistically rigorous confidence limits on lifetimes and amplitudes.
• The gDAIS software successfully generates images of amplitudes and their uncertainties.
• The method enables accurate assessment of cellular metabolism and FRET relationships, including error limits for amplitude ratios.

Conclusions:

• Global decay-associated analysis offers a superior alternative to conventional FLIM analysis, mitigating issues with low photon counts.
• gDAIS software enhances the reliability of FLIM data interpretation for biomolecular and cellular studies.
• This approach facilitates confident assessment of cellular dynamics and molecular interactions through precise quantification.