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Updated: Nov 3, 2025
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Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue
Published on: March 23, 2015
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Extraction of Functional Mitochondria Based on Membrane Stiffness.
Md Habibur Rahman1,2, Qinru Xiao1, Shirui Zhao1,3
1Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China.
Methods in Molecular Biology (Clifton, N.J.)
|June 1, 2021
Summary
This study introduces a microfluidic cell shredder for efficient mitochondrial extraction. The device optimizes shear stress for various cell types, yielding significantly more functional mitochondria compared to traditional methods.
Area of Science:
- Cell Biology
- Biotechnology
- Mitochondrial Research
Background:
- Mitochondrial dysfunction is implicated in severe diseases like cancer and neurodegeneration.
- In vitro analysis of mitochondria is crucial for understanding disease mechanisms and developing therapies.
- Standardizing mitochondrial extraction protocols is challenging due to cell membrane stiffness variations.
Purpose of the Study:
- To describe a protocol for determining optimal shear stress for mitochondrial extraction using a microfluidic cell shredder.
- To establish a standardized method for lysing cells while preserving mitochondrial function and integrity.
- To compare the efficacy of the microfluidic shredder against conventional methods like the Dounce homogenizer.
Main Methods:
- Development and utilization of a microfluidics-based cell shredder.
- Empirical determination of threshold shear stress for different cell lines (HEK 293, C2C12, SH-SY5Y).
- Assessment of extracted mitochondria quality via membrane potential and integrity assays.
Main Results:
- Optimal shear stress for HEK 293 and C2C12 cells identified at 16.4 Pa; 27.4 Pa required for stiffer SH-SY5Y cells.
- The microfluidic shredder yielded at least 40% more functional mitochondria than the Dounce homogenizer.
- Superior mitochondrial integrity and yield were observed with the microfluidic device, particularly at low cell concentrations and small sample volumes.
Conclusions:
- The microfluidics-based cell shredder offers a standardized and efficient method for high-quality mitochondrial extraction.
- This technology overcomes limitations of traditional methods, improving mitochondrial yield and functionality.
- The protocol enables precise control over cell lysis, crucial for studying mitochondrial dysfunction in disease research.
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