Related Experiment Video
Updated: Nov 11, 2025
10:29
Morphological and Functional Evaluation of Axons and their Synapses during Axon Death in Drosophila melanogaster
Published on: March 16, 2020
8.2K
Mitochondrial Behavior in Axon Degeneration and Regeneration
Biyao Wang1, Minghao Huang2, Dehao Shang2
1The VIP Department, School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang, China.
Frontiers in Aging Neuroscience
|March 25, 2021
Summary
Mitochondrial dysfunction contributes to axon degeneration in aging and neurological diseases. Restoring mitochondrial health promotes axon regeneration, offering therapeutic potential for nerve injuries and neurodegenerative conditions.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Mitochondria are vital for neuronal function, supplying energy and regulating calcium.
- Mitochondrial dysfunction is an early hallmark of axon degeneration in various neurological conditions.
- Mitochondria are crucial for both axon degeneration and regeneration.
Purpose of the Study:
- To examine axonal mitochondrial behavior in aging, injury, and neurodegenerative diseases (Alzheimer's, Parkinson's, ALS).
- To elucidate the role of mitochondria in axon regeneration.
- To identify therapeutic strategies targeting mitochondrial dysfunction for promoting axonal regeneration.
Main Methods:
- Review of existing literature on mitochondrial biology in axonal health and disease.
- Comparative analysis of mitochondrial behavior across different pathological conditions.
- Exploration of therapeutic interventions aimed at restoring mitochondrial function.
Main Results:
- Mitochondrial dysfunction, including oxidative stress and impaired dynamics, precedes axon degeneration.
- Enhancing mitochondrial transport, reducing reactive oxygen species (ROS), and improving bioenergetics support axon regeneration.
- Specific patterns of mitochondrial dysfunction are observed in aging, traumatic injuries, and neurodegenerative diseases.
Conclusions:
- Mitochondrial health is critical for maintaining axonal integrity and function.
- Targeting mitochondrial dysfunction presents a promising therapeutic avenue for neurological injuries and diseases.
- Further research into novel mitochondrial-based therapies could significantly advance axon regeneration strategies.
Related Concept Videos
01:15Neurogenesis and Regeneration of Nervous Tissue
1.3K
In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
1.3K
01:21Neurons: The Axon
5.9K
Axons are long, cytoplasmic processes of nerve cells capable of propagating electrical impulses known as action potentials. The cytoplasm or axoplasm of an axon contains neurofibrils, neurotubules, small vesicles, lysosomes, mitochondria, and various enzymes, all encased within the axolemma, the plasma membrane of the axon.
The axon attaches to the cell body at a cone-shaped elevation called the axon hillock. The initial part of the axon, closest to the hillock, is known as the initial segment....
The axon attaches to the cell body at a cone-shaped elevation called the axon hillock. The initial part of the axon, closest to the hillock, is known as the initial segment....
5.9K
01:45Mitochondrial Membranes
14.7K
A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
14.7K
01:37Mitochondria
17.4K
Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
17.4K
01:25Nervous Tissue: Myelin
4.3K
The myelin sheath is a multilayered lipid and protein covering that insulates the axon of a neuron, enhancing the speed of nerve impulse conduction. Axons without this sheath are referred to as unmyelinated. Two types of neuroglia, Schwann cells in the peripheral nervous system (PNS) and oligodendrocytes in the central nervous system (CNS) are responsible for producing myelin sheaths.
Schwann cells begin to form myelin sheaths around axons during fetal development. They wrap around a small...
Schwann cells begin to form myelin sheaths around axons during fetal development. They wrap around a small...
4.3K