Rapid isolation and purification of functional platelet mitochondria using a discontinuous Percoll gradient
| Autor: | Jean-Luc Jougleux, Nicolas Pichaud, Jacob L. Léger, Luc H. Boudreau, Fanta Savadogo |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Cell 030204 cardiovascular system & hematology Mitochondrion Flow cytometry 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Cardiolipin medicine Humans Platelet biology medicine.diagnostic_test Chemistry Cytochrome c Povidone Hematology General Medicine Silicon Dioxide Mitochondria Cell biology Staining 030104 developmental biology medicine.anatomical_structure biology.protein Percoll |
| Zdroj: | Platelets. 31:258-264 |
| ISSN: | 1369-1635 0953-7104 |
| DOI: | 10.1080/09537104.2019.1609666 |
| Popis: | The isolation of mitochondria is gaining importance in experimental and clinical laboratory settings. The mitochondrion is known as the powerhouse of the cell as it produces the energy to power most cellular functions but is also involved in many cellular processes. Of interest, mitochondria and mitochondrial components (i.e. circular DNA, N-formylated peptides, cardiolipin) have been involved in several human inflammatory pathologies, such as cancer, Alzheimer's disease, Parkinson's disease, and rheumatoid arthritis. Therefore, stringent methods of isolation and purification of mitochondria are of the utmost importance in assessing mitochondrial-related diseases. While several mitochondrial isolation methods have been previously published, these techniques are aimed at yielding mitochondria from cells types other than platelets. In addition, little information is known on the number of platelet-derived microparticles that can contaminate the mitochondrial preparation or even the overall quality and integrity of the mitochondria. In this project, we provide an alternate purification method yielding mitochondria of high purity and integrity from human platelets. Using human platelets, flow cytometry and transmission electron microscopy experiments were performed to demonstrate that the Percoll gradient method yielded significantly purified mitochondria by removing platelet membrane debris. Mitochondrial respiration following the substrate-uncoupler-inhibitor-titration (SUIT) protocol was similar in both the purified and crude mitochondrial extraction methods. Finally, the cytochrome c effect and JC-1 staining did not exhibit a significant difference between the two methods, suggesting that the mitochondrial integrity was not affected. Our study suggests that the Percoll discontinuous gradient purifies viable platelet-derived mitochondria by removing platelet-derived debris, including microparticles, therefore confirming that this isolation method is ideal for studying the downstream effects of intact mitochondria in mitochondrial-related diseases. |
| Databáze: | OpenAIRE |
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