Related Experiment Video
Updated: Nov 2, 2025
Comprehensive Autopsy Program for Individuals with Multiple Sclerosis
Published on: July 19, 2019
Investigation of the correlation between mildly deleterious mtDNA Variations and the clinical progression of multiple
Ilse S Pienaar1, Rean Mohammed2, Rebecca Courtley3
1School of Life Sciences, University of Sussex, Falmer, United Kingdom.
Background:
Evidence suggests that mitochondrial DNA (mtDNA) variation at a population level may influence susceptibility to, or the clinical progression of Multiple Sclerosis (MS).
Objective:
To determine if mtDNA population variation is linked to the clinical progress of MS.
Methods:
Using the complete mtDNA sequences of 217 MS patients, we applied the new 'variant load' model, designed as a framework by which to examine the role of mtDNA variation in the context of complex clinical disease.
Results:
No significant association was detected between mtDNA 'variant load'and the clinical measures of progression.
Conclusion:
Our results suggest that mtDNA population variation does not play a substantial role in the clinical progression of MS; however, modest effects and/or effects in a subgroup of patients cannot be entirely excluded. Results do not exclude the possibility of detecting an association between variation and more strictly quantified variables obtained from histopathologically-stained specimens. The results further illustrate the method's applicabilityto other disease phenotypes.
Insights
Mitochondrial DNA (mtDNA) variation does not significantly impact Multiple Sclerosis (MS) progression. Further research may explore subtle effects or specific patient subgroups for a clearer understanding of mtDNA
Area of Science:
- Genetics
- Neurology
- Mitochondrial Biology
Background:
- Mitochondrial DNA (mtDNA) variation is hypothesized to influence Multiple Sclerosis (MS) susceptibility and progression.
- Population-level mtDNA differences may play a role in complex diseases like MS.
Purpose of the Study:
- To investigate the association between mitochondrial DNA (mtDNA) population variation and the clinical progression of Multiple Sclerosis (MS).
- To assess the utility of the 'variant load' model in studying mtDNA's role in complex diseases.
Main Methods:
- Analysis of complete mitochondrial DNA (mtDNA) sequences from 217 Multiple Sclerosis (MS) patients.
- Application of the novel 'variant load' model to quantify mtDNA variation in the context of disease progression.
Main Results:
- No statistically significant correlation was found between the 'variant load' of mitochondrial DNA (mtDNA) and clinical measures of Multiple Sclerosis (MS) progression.
- The study did not detect a substantial link between overall mtDNA population variation and disease advancement.
Conclusions:
- Mitochondrial DNA (mtDNA) population variation appears to have a limited role in the clinical progression of Multiple Sclerosis (MS).
- The possibility of modest effects or impacts within specific patient subgroups cannot be definitively ruled out.
- The 'variant load' model's applicability extends to other disease phenotypes, suggesting its potential for future research.
More Related Videos
10:46A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
Published on: December 9, 2015
07:15Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
Published on: January 16, 2019
Related Concept Videos
01:20Mismatch Repair
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
02:26Comparing Copy Number Variations and SNPs
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
02:07Tumor Progression
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...