ProDiVis: a method to normalize fluorescence signal localization in 3D specimens

Autor: Kyle T. Nguyen, Alexandre R. Sathler, Alvaro G. Estevez, Isabelle E. Logan, Maria Clara Franco
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Frontiers in Cell and Developmental Biology, Vol 12 (2024)
Druh dokumentu: article
ISSN: 2296-634X
DOI: 10.3389/fcell.2024.1420161
Popis: A common problem in confocal microscopy is the decrease in intensity of excitation light and emission signal from fluorophores as they travel through 3D specimens, resulting in decreased signal detected as a function of depth. Here, we report a visualization program compatible with widely used fluorophores in cell biology to facilitate image interpretation of differential protein disposition in 3D specimens. Glioblastoma cell clusters were fluorescently labeled for mitochondrial complex I (COXI), P2X7 receptor (P2X7R), β-Actin, Ki-67, and DAPI. Each cell cluster was imaged using a laser scanning confocal microscope. We observed up to ∼70% loss in fluorescence signal across the depth in Z-stacks. This progressive underrepresentation of fluorescence intensity as the focal plane deepens hinders an accurate representation of signal location within a 3D structure. To address these challenges, we developed ProDiVis: a program that adjusts apparent fluorescent signals by normalizing one fluorescent signal to a reference signal at each focal plane. ProDiVis serves as a free and accessible, unbiased visualization tool to use in conjunction with fluorescence microscopy images and imaging software.
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