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Updated: Mar 16, 2026
Analyzing Mitochondrial Transport and Morphology in Human Induced Pluripotent Stem Cell-Derived Neurons in Hereditary Spastic Paraplegia
Published on: February 9, 2020
Mfn2 is Required for Mitochondrial Development and Synapse Formation in Human Induced Pluripotent Stem Cells/hiPSC
Du Fang1, Shijun Yan1, Qing Yu1,2
1Department of Pharmacology and Toxicology, and Higuchi Bioscience Center, School of Pharmacology, University of Kansas, Lawrence, KS, USA.
Abstract:
Mitochondria are essential dynamic organelles for energy production. Mitochondria dynamically change their shapes tightly coupled to fission and fusion. Imbalance of fission and fusion can cause deficits in mitochondrial respiration, morphology and motility. Mfn2 (mitofusin 2), a mitochondrial membrane protein that participates in mitochondrial fusion in mammalian cells, contributes to the maintenance and operation of the mitochondrial network. Due to lack of applicable model systems, the mechanisms and involvement of mitochondria in neurogenesis in human brain cells have not been well explored. Here, by employing the human induced pluripotent stem cells (hiPSCs) differentiation system, we fully characterized mitochondrial development, neurogenesis and synapse formation in hiPSCs-derived cortical neurons. Differentiation of hiPSCs to cortical neurons with extended period demonstrates mature neurophysiology characterization and functional synaptic network formation. Mitochondrial respiration, morphology and motility in the differentiated neurons also exhibit pronounced development during differentiation. Mfn2 knock-down results in deficits in mitochondrial metabolism and network, neurogenesis and synapse formation, while Mfn2 overexpression enhances mitochondrial bioenergetics and functions, and promotes the differentiation and maturation of neurons. Together, our data indicate that Mfn2 is essential for human mitochondrial development in neuronal maturation and differentiation, which will enhance our understanding of the role of Mfn2 in neurogenesis.
Insights
Mitofusin 2 (Mfn2) is crucial for mitochondrial development and function in human neurons. This protein is essential for neurogenesis and synapse formation during neuronal maturation.
Area of Science:
- Neuroscience
- Cell Biology
- Mitochondrial Biology
Background:
- Mitochondria are vital organelles for cellular energy and function.
- Mitochondrial dynamics, including fission and fusion, are critical for maintaining cellular health.
- The role of mitochondria in human neurogenesis remains underexplored due to limited model systems.
Purpose of the Study:
- To investigate the role of mitofusin 2 (Mfn2) in mitochondrial development during human neurogenesis.
- To characterize mitochondrial dynamics, neurogenesis, and synapse formation in human induced pluripotent stem cells (hiPSCs)-derived cortical neurons.
- To elucidate the impact of Mfn2 modulation on neuronal differentiation and maturation.
Main Methods:
- Utilized a human induced pluripotent stem cells (hiPSCs) differentiation system to generate cortical neurons.
- Characterized mitochondrial respiration, morphology, and motility throughout neuronal differentiation.
- Manipulated Mfn2 expression (knock-down and overexpression) to assess its effects on neuronal development and function.
Main Results:
- hiPSCs successfully differentiated into cortical neurons with mature neurophysiology and functional synaptic networks.
- Mitochondrial respiration, morphology, and motility showed significant development during neuronal differentiation.
- Mfn2 knock-down impaired mitochondrial metabolism, neurogenesis, and synapse formation.
- Mfn2 overexpression enhanced mitochondrial bioenergetics and promoted neuronal differentiation and maturation.
Conclusions:
- Mfn2 plays an essential role in mitochondrial development and function during human neuronal maturation.
- Mfn2 is critical for successful neurogenesis and synapse formation in hiPSCs-derived cortical neurons.
- Understanding Mfn2's function provides insights into mitochondrial involvement in human brain development.
