Mitochondrial Diseases
Mitochondrial Diseases - Related Videos
15:09
The Use of Primary Human Fibroblasts for Monitoring Mitochondrial Phenotypes in the Field of Parkinson's Disease
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Cited by 22 •
2012
Fibroblasts from patients carrying mutations in Parkinson's disease-causing genes represent an easily accessible ex vivo model to study disease-associated phenotypes. Live cell imaging gives the opportunity to study morphological and functional parameters in living cells. Here we describe the preparation of human fibroblasts and subsequent monitoring of mitochondrial phenotypes.
08:56
Modeling Mitochondrial Disease Using Brain Organoids: A Focus on Mitochondrial Encephalomyopathy, Lactic Acidosis, and Stroke-like Episodes
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Cited by 1 •
2025
Brain organoids serve as a valuable model for Mitochondrial Encephalomyopathy, Lactic Acidosis, and Stroke-like episodes (MELAS) studies, offering insights into their underlying pathophysiology and providing a platform for drug screening. Organoids derived from cell lines with varying levels of heteroplasmy of disease-causing genes exhibit significant phenotypic differences.
08:40
An Optimized Protocol to Analyze Glycolysis and Mitochondrial Respiration in Lymphocytes
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Cited by 38 •
2016
The study of metabolism is becoming increasingly relevant to immunological research. Here, we present an optimized method for measuring glycolysis and mitochondrial respiration in mouse splenocytes, and T and B lymphocytes.
08:43
Simultaneous Measurement of Mitochondrial Calcium and Mitochondrial Membrane Potential in Live Cells by Fluorescent Microscopy
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Cited by 29 •
2017
Mitochondria can utilize the electrochemical potential across their inner membrane (ΔΨm) to sequester calcium (Ca2+), allowing them to shape cytosolic Ca2+ signaling within the cell. We describe a method for simultaneously measuring mitochondria Ca2+ uptake and ΔΨm in live cells using fluorescent dyes and confocal microscopy.
06:07
Histological Examination of Mitochondrial Morphology in a Parkinson's Disease Model
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Cited by 3 •
2023
This study presents a method to analyze the morphology of mitochondria based on immunostaining and image analysis in mouse brain tissue in situ. It also describes how this allows one to detect changes in mitochondrial morphology induced by protein aggregation in Parkinson's disease models.
FAQs
Heteroplasmy can modify severity because cells may contain different proportions of mitochondria carrying a disease-associated mutation. A higher proportion of affected mitochondria may produce a greater disruption of oxidative phosphorylation and ATP production, although this proportion is an influence rather than a complete predictor. Tracking heteroplasmy can therefore help researchers interpret variation among mitochondrial disease cases.
Both mitochondrial DNA and nuclear genes can be relevant because mutations in either source may disrupt oxidative phosphorylation, the process linked here to ATP generation. Considering both genetic locations is important when investigating the biological basis of a case or developing a genetic diagnosis. This dual genetic context is a central feature of mitochondrial disease research.
These tissues have high energy demands, so impaired ATP production can affect their functions. Muscle, brain, heart, and nerves provide important biological contexts for examining how mitochondrial dysfunction produces tissue-specific effects. Studying them connects the molecular disruption of oxidative phosphorylation with the distribution of disease consequences across the body.
Reactive oxygen species provide a second mechanism of cellular stress beyond reduced ATP production. When mutations disrupt oxidative phosphorylation, they may also increase these chemically reactive molecules, contributing to cellular damage. This distinction matters experimentally because studies can examine both energy failure and stress-related injury when assessing how mitochondrial dysfunction affects cells.
Genetic diagnosis helps connect a mitochondrial disease case to mutations in mitochondrial DNA or nuclear genes. Its value is not limited to identifying a disorder: it can support investigation of the underlying oxidative-phosphorylation defect and clarify the genetic basis being studied. This makes diagnosis a central clinical application of mitochondrial biology.
Disease monitoring provides a way to follow mitochondrial dysfunction after the initial diagnostic assessment. Because severity can be influenced by the proportion of affected mitochondria and because tissues may experience energy disruption and cellular stress, monitoring can help evaluate how the condition changes. The overview identifies this ongoing assessment as an important clinical application.
Therapy evaluation can focus on whether an intervention restores mitochondrial function or reduces cellular damage. These are distinct outcomes: restoring function addresses impaired energy production, whereas reducing damage targets consequences associated with cellular stress and reactive oxygen species. Assessing both gives a broader picture of whether a proposed treatment benefits the biology underlying mitochondrial disease.
Studying mitochondrial diseases helps biology researchers link genetics with cellular metabolism. These disorders connect mutations, oxidative phosphorylation, ATP production, reactive oxygen species, and tissue-specific effects within one research context. Findings can therefore advance understanding of mitochondrial genetics, energy metabolism, and cell stress while also supporting disease diagnosis, monitoring, and therapy assessment.