A Semi-Automatic Tool for the Standardized Analysis of Fluorescent Intensity Changes in Polarized Cells

Area of Science:

• Cellular and Molecular Biology
• Neuroscience
• Biophysics

Background:

• Intracellular messenger imaging, such as calcium (Ca2+) imaging, is crucial for monitoring cellular activity and receptor activation in real-time.
• Current analysis methods are often biased by region of interest (ROI) selection and movement correction, with commercial software being expensive and inaccessible.
• Existing automated tools focus on cell somata, neglecting subcellular structures and complex cell morphologies, limiting subcellular imaging experiments.

Purpose of the Study:

• To develop and validate an automated, open-source program for defining ROIs in subcellular imaging experiments.
• To address the limitations of existing software in handling complex cell morphologies and enabling subcellular analysis.
• To provide a free, user-friendly tool for researchers conducting advanced cellular imaging.

Main Methods:

• Development of a novel program utilizing simple mathematical methods for ROI determination.
• Implementation of straightforward statistical methods for movement correction in imaging data.
• Validation of the program using cochlear Deiters' cells, known for their complex morphology and role in fluid transport.

Main Results:

• The program successfully automated the definition of ROIs for subcellular imaging, even in cells with complex structures.
• Validation experiments on Deiters' cells demonstrated the program's capability to facilitate the examination of subcellular Ca2+ handling.
• The developed tool showed promise in overcoming previous challenges in subcellular imaging analysis.

Conclusions:

• The new open-source program effectively automates ROI definition for subcellular imaging, enhancing cellular activity analysis.
• This tool offers a valuable, accessible solution for researchers studying complex cellular structures and dynamics.
• The program is expected to advance the planning and execution of subcellular imaging experiments, particularly in neuroscience and cell biology.