Visualizing Mitophagy with Fluorescent Dyes for Mitochondria and Lysosome

Area of Science:

• Cell Biology
• Mitochondrial Biology

Background:

• Mitochondria are vital organelles involved in cellular energy production, calcium homeostasis, and apoptosis.
• Mitophagy, the selective degradation of mitochondria, is crucial for cellular quality control.
• Current in vivo mitophagy assays are challenging, necessitating alternative live-cell imaging methods.

Purpose of the Study:

• To describe a protocol for evaluating mitophagy in live cells using fluorescent microscopy.
• To provide a method for quantifying mitochondria and lysosomes and assessing mitochondrial morphology.
• To facilitate the study of mitochondrial dynamics and quality control.

Main Methods:

• Utilizing the cell-permeant green-fluorescent dye MitoTracker Green to label mitochondria.
• Employing the red-fluorescent lysosome dye LysoTracker Red to label lysosomes.
• Visualizing and analyzing fluorescent signals in live cells using fluorescent microscopy.

Main Results:

• The protocol enables direct observation of mitophagy in live cells.
• It allows for the quantification of mitochondria and lysosomes.
• Mitochondrial morphology can be assessed concurrently with mitophagy evaluation.

Conclusions:

• This live-cell fluorescent microscopy method offers a practical approach to study mitophagy.
• The protocol aids in understanding mitochondrial quality control mechanisms.
• It provides a valuable tool for researchers in mitochondrial biology and cell death studies.