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Updated: Jun 6, 2025

An In Vitro Approach to Study Mitochondrial Dysfunction: A Cybrid Model
Published on: March 9, 2022
Disease registries and rare disorders: The virtuous example of mitochondrial medicine
Daniele Orsucci1, Elena Caldarazzo Ienco1, Piervito Lopriore2
1Unit of Neurology, San Luca Hospital, Lucca, Italy.
Abstract:
Primary mitochondrial disorders (PMDs) are an extraordinarily complex group of rare disorders caused by impairment of the mitochondrial electron transport chain, or respiratory chain. Studying genotype-phenotype relationships in PMDs is a complex task. The clinical variability is large even in individuals with the same genotype, and the statistical power is low in single-center studies because of their rarity. To better define the clinical phenotypes associated with PMDs, in the last 15 years a significant multicenter effort has led to nation-wide studies on large cohorts of patients. Many national registries of mitochondrial patients have been developed in recent years, and now there is a strong effort towards international (and even global) registries. This review will revise the notable advances obtained with such studies in recent years, and will discuss the actual developments and future perspectives.
Insights
Primary mitochondrial disorders (PMDs) are rare, complex diseases affecting the respiratory chain. Multicenter studies and patient registries are improving our understanding of PMD genotype-phenotype relationships.
Area of Science:
- Biochemistry
- Genetics
- Rare Diseases
Background:
- Primary mitochondrial disorders (PMDs) are rare, complex genetic conditions impacting the mitochondrial electron transport chain.
- Significant clinical variability exists in PMDs, complicating genotype-phenotype relationship studies.
- The rarity of PMDs limits statistical power in single-center research.
Purpose of the Study:
- To review advances in understanding PMD phenotypes through large-scale studies.
- To discuss current developments and future directions in PMD research.
- To highlight the role of multicenter efforts and patient registries.
Main Methods:
- Review of multicenter studies and national patient registries established over the last 15 years.
- Analysis of data from large patient cohorts to define clinical phenotypes.
- Discussion of international and global registry initiatives.
Main Results:
- Multicenter studies have significantly advanced the definition of clinical phenotypes in PMDs.
- Development of numerous national registries has facilitated large-scale patient data collection.
- A growing trend towards international and global registries is evident.
Conclusions:
- Large-scale, collaborative research efforts are crucial for understanding rare diseases like PMDs.
- Patient registries are essential tools for advancing PMD research and defining genotype-phenotype correlations.
- Future research should focus on expanding international collaboration and data sharing for PMDs.
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