Related Experiment Video
Updated: Jul 2, 2025
06:07
Author Spotlight: Establishing a New Fluorescence-Based Protocol for In Vivo Mitochondrial Morphology Analysis in Parkinson's Disease
Published on: June 23, 2023
1.6K
[Optineurin and mitochondrial dysfunction in neurodegeneration]
Baptiste D'Urso1, Robert Weil2, Pierre Génin2
1CIMI-Paris, UPMC UMRS CR7 - Inserm U1135 - CNRS EMR8255, Faculté de médecine Sorbonne Université site Pitié-Salpêtrière, Paris, France - Sorbonne Université, Faculté des sciences et ingénierie, Paris, France.
Medecine Sciences : M/S
|February 27, 2024
Summary
Optineurin (OPTN) is a key receptor in mitophagy, a process vital for cellular health. This review explores OPTN's role in degrading damaged mitochondria and its links to neurodegenerative diseases like Parkinson's.
Area of Science:
- Cell Biology
- Molecular Biology
- Neuroscience
Background:
- Optineurin (OPTN) functions as a crucial receptor in selective autophagy, particularly mitophagy.
- Mutations in the OPTN gene are associated with normal-tension glaucoma and amyotrophic lateral sclerosis.
- Damaged mitochondria must be degraded to prevent cellular damage and disease.
Approach:
- This review synthesizes recent research on optineurin's function in mitophagy.
- It examines the molecular mechanisms governing selective mitochondrial degradation.
- The review connects optineurin's role in mitophagy to its potential involvement in neurodegenerative disorders.
Key Points:
- Optineurin (OPTN) is essential for the selective removal of damaged mitochondria via mitophagy.
- Mitophagy prevents the accumulation of dysfunctional mitochondria, reactive oxygen species, and apoptotic factors.
- PINK1 and Parkin are key regulators of mitophagy, with mutations linked to Parkinson's disease.
Conclusions:
- Optineurin plays a critical role in maintaining mitochondrial quality control through mitophagy.
- Dysfunctional mitophagy, potentially involving optineurin, may contribute to the pathogenesis of neurodegenerative diseases.
- Further research into optineurin's function could reveal new therapeutic targets for neurological disorders.
Related Concept Videos
01:48ATP Synthase: Mechanism
14.6K
In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased...
14.6K
01:19Translocation of Proteins into the Mitochondria
3.1K
Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
3.1K
01:46Electron Transport Chain: Complex I and II
13.3K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
13.3K
01:37Neural Regulation
39.4K
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
39.4K
01:37Mitochondria
12.6K
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,...
12.6K
01:45Mitochondrial Membranes
10.3K
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,...
10.3K