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Animal Mitochondrial Genetics

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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...

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Related Experiment Video

Updated: May 15, 2026

Software-Assisted Quantitative Measurement of Osteoarthritic Subchondral Bone Thickness

Software-Assisted Quantitative Measurement of Osteoarthritic Subchondral Bone Thickness

Published on: March 18, 2022

Mitochondrial genetics and osteoarthritis.

Ignacio Rego-Perez¹, Mercedes Fernandez-Moreno, Angel Soto-Hermida

¹Rheumatology Division, INIBIC-Complejo Hospitalario Universitario A Coruna, 15006-A Coruna, Spain.

Frontiers in Bioscience (Scholar Edition)

|January 2, 2013

Summary

Mitochondrial DNA (mtDNA) haplogroups are linked to osteoarthritis (OA) risk and severity. This review explores how mitochondrial genetics and mtDNA variations influence OA progression and related molecular markers.

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Tissue Collection and RNA Extraction from the Human Osteoarthritic Knee Joint

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Published on: July 22, 2021

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Last Updated: May 15, 2026

Software-Assisted Quantitative Measurement of Osteoarthritic Subchondral Bone Thickness

Software-Assisted Quantitative Measurement of Osteoarthritic Subchondral Bone Thickness

Published on: March 18, 2022

Tissue Collection and RNA Extraction from the Human Osteoarthritic Knee Joint

Tissue Collection and RNA Extraction from the Human Osteoarthritic Knee Joint

Published on: July 22, 2021

Area of Science:

Genetics
Mitochondrial Biology
Osteoarthritis Research

Background:

Osteoarthritis (OA) has a significant genetic component, though complex.
Emerging evidence implicates mitochondria in OA pathogenesis.
Mitochondrial DNA (mtDNA) haplogroups represent novel genetic variants associated with OA.

Purpose of the Study:

To review the influence of mitochondrial genetics on OA.
To examine the role of mtDNA haplogroups in OA prevalence, severity, and progression.
To assess the impact of mitochondrial factors on OA-related biomarkers.

Main Methods:

Literature review focusing on genetic and mitochondrial aspects of OA.
Analysis of studies investigating mtDNA variations and OA.
Synthesis of evidence linking mtDNA haplogroups to OA phenotypes.

Main Results:

mtDNA damage and impaired repair are observed in OA chondrocytes.
Specific mtDNA haplogroups are associated with OA risk and severity.
Mitochondrial genetics impact OA-related features like nitric oxide production and telomere length.

Conclusions:

Mitochondrial genetics, particularly mtDNA haplogroups, are crucial in OA.
mtDNA variations contribute to OA susceptibility and disease course.
Targeting mitochondrial pathways may offer new OA therapeutic strategies.