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Updated: Feb 22, 2026
Visualizing Mitophagy with Fluorescent Dyes for Mitochondria and Lysosome
Published on: November 30, 2022
Live Cell Imaging of Mitochondrial Autophagy with a Novel Fluorescent Small Molecule
Hidefumi Iwashita1,2, Satoru Torii3, Noriyoshi Nagahora2
1Dojindo Laboratories , Tabaru 2025-5, Mashiki-machi, Kumamoto 861-2202, Japan.
Abstract:
There has been a growing interest in mitophagy, mitochondria-selective autophagy, which plays an essential role in maintaining intracellular homeostasis. We have developed a small-molecule fluorescent probe, Mtphagy Dye, for visualizing mitophagy, which was readily synthesized from a known perylene derivative, perylene-3,4-dicarboxylic anhydride. Mtphagy Dye has suitable fluorescent properties for detecting mitochondrial acidification during mitophagy in the long-wavelength region that does not damage mitochondria. Using Mtphagy Dye, we were able to visualize mitophagy with both cases of Parkin-dependent and -independent HeLa cells.
Insights
Researchers developed Mtphagy Dye, a novel fluorescent probe, to visualize mitophagy, a key process for cell health. This probe effectively tracks mitochondrial changes without causing damage, aiding mitophagy studies.
Area of Science:
- Cell Biology
- Biochemistry
- Molecular Biology
Background:
- Mitophagy, the selective removal of damaged mitochondria, is crucial for maintaining cellular homeostasis.
- Dysfunctional mitophagy is implicated in various diseases, highlighting the need for effective visualization tools.
Purpose of the Study:
- To develop and characterize a novel small-molecule fluorescent probe for visualizing mitophagy.
- To assess the probe's utility in different mitophagy pathways.
Main Methods:
- Synthesis of a novel fluorescent probe, Mtphagy Dye, from perylene-3,4-dicarboxylic anhydride.
- Characterization of the probe's fluorescent properties, focusing on mitochondrial acidification detection.
- Application of the probe to visualize mitophagy in both Parkin-dependent and Parkin-independent HeLa cells.
Main Results:
- Mtphagy Dye was successfully synthesized and demonstrated suitable fluorescent properties for detecting mitochondrial acidification.
- The probe operates in the long-wavelength region, minimizing mitochondrial damage.
- Mitophagy was effectively visualized in various HeLa cell models using Mtphagy Dye.
Conclusions:
- Mtphagy Dye is a valuable tool for visualizing mitophagy due to its specific detection capabilities and minimal mitochondrial impact.
- The probe facilitates the study of mitophagy in diverse cellular contexts, including both Parkin-dependent and -independent pathways.
- This development offers a new avenue for investigating the role of mitophagy in cellular health and disease.
