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A 3D analysis revealed complexe mitochondria morphologies in porcine cumulus cells
Amel Lounas1, Ariane Lebrun1, Isabelle Laflamme1
1Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle (CRDSI), Département des Sciences Animales, Faculté des Sciences de L'agriculture et de L'alimentation,, Université Laval, Québec, QC, G1V 0A6, Canada.
Porcine cumulus cells contain diverse mitochondrial shapes, from short to elongated and complex networks. Understanding these mitochondrial morphologies is key to improving oocyte developmental competence.
Area of Science:
- Reproductive Biology
- Cell Biology
- Mitochondrial Biology
Background:
- Bilateral cell-to-cell communication between oocytes and cumulus cells is vital for oocyte development.
- Mitochondria produce essential molecules like pyruvate derivatives, influencing oocyte competence.
- Mitochondrial morphology is linked to their function and regulation.
Purpose of the Study:
- To describe and characterize the diverse mitochondrial morphologies within porcine cumulus cells.
- To investigate the organization of the mitochondrial network in these cells.
Main Methods:
- 2D confocal microscopy using Tetramethylrhodamine, Methyl Ester, Perchlorate (TMRM) staining.
- Scanning Electron Microscopy (SEM) for nanoscale visualization.
- Focused Ion-Beam Scanning Electron Microscopy (FIB-SEM) for 3D reconstruction.
Main Results:
- Mitochondria in porcine cumulus cells exhibit varied morphologies: short, intermediate, long, and very long.
- Elongated mitochondria were the most prevalent form observed.
- 3D FIB-SEM revealed complex structures, including connected clusters and branched mitochondria.
Conclusions:
- Porcine cumulus cells possess a complex and diverse mitochondrial network.
- Detailed characterization of mitochondrial morphology provides a basis for studying mitochondrial dynamics.
- Further research can explore how mitochondrial organization impacts cumulus cell function during in vitro maturation.
