Related Experiment Video
Updated: Mar 2, 2026

08:45
Determination of Mitochondrial Respiration and Glycolysis in Ex Vivo Retinal Tissue Samples
Published on: August 4, 2021
4.9K
Inherited eye-related disorders due to mitochondrial dysfunction
Patrick Yu-Wai-Man1,2,3, Nancy J Newman4
1Department of Clinical Neurosciences, School of Clinical Medicine, University of Cambridge, Cambridge, UK.
Human Molecular Genetics
|May 9, 2017
Summary
Mitochondrial dysfunction causes vision loss and other eye problems. Advances in genetic understanding and new therapies, like gene replacement and mitochondrial replacement, offer hope for patients.
Area of Science:
- Ophthalmology
- Genetics
- Molecular Biology
Background:
- Mitochondrial dysfunction underlies numerous genetic disorders.
- Ocular manifestations are common, affecting optic nerve, retina, visual pathways, and extraocular muscles.
- Mechanisms include impaired energy production, oxidative stress, and altered mitochondrial dynamics.
Purpose of the Study:
- To review advances in understanding the genetic basis of mitochondrial disorders.
- To highlight insights into pathophysiology and potential therapeutic targets.
- To discuss emerging therapeutic strategies and diagnostic improvements.
Main Methods:
- Review of molecular genetic basis of mitochondrial disorders.
- Analysis of pathophysiologic mechanisms.
- Evaluation of therapeutic strategies and diagnostic advancements.
Main Results:
- Improved genetic diagnosis and understanding of disease mechanisms.
- Development of advanced genetic manipulation techniques for disease modeling.
- Emerging therapies including neuroprotection, gene replacement, and stem cell paradigms.
Conclusions:
- Advances in molecular genetics have improved diagnosis and revealed therapeutic targets for mitochondrial disorders.
- New therapeutic strategies are translating from research to clinical application.
- Mitochondrial replacement techniques offer a way to prevent transmission of mitochondrial DNA mutations.
Related Concept Videos
Photoreceptors and Visual Pathways
9.9K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
9.9K
Animal Mitochondrial Genetics
9.7K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
9.7K
Genetic Lingo
116.2K
Overview
116.2K
Electron Transport Chain: Complex I and II
19.3K
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...
19.3K
Inborn Errors of Metabolism
962
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
962
Mitochondria
21.0K
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,...
21.0K

