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.

Experimental Neurology
|November 27, 2024
PubMed

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.

Related Concept Videos

Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

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...
7.5K
Mitochondrial Membranes01:45

Mitochondrial Membranes

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,...
8.7K
Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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...
11.7K
Lysosomal Hydrolases01:22

Lysosomal Hydrolases

Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.8K
Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
879
Mitochondria01:37

Mitochondria

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,...
11.1K