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Updated: Jul 20, 2026
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Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing
Published on: February 10, 2023
An oligonucleotide microarray for high-throughput sequencing of the mitochondrial genome
Shaoyu Zhou1, Keyaunoosh Kassauei, David J Cutler
1Department of Otolaryngology and Head and Neck Surgery, Johns Hopkins University School of Medicine, 1550 Orleans St. North, Baltimore, MD 21231, USA.
The Journal of Molecular Diagnostics : JMD
|August 26, 2006
Summary
The improved MitoChip v2.0 sequences the entire mitochondrial genome, identifying more mutations in head and neck cancers. This high-throughput platform enhances detection of cancer-associated mitochondrial DNA variants.
Area of Science:
- Genomics
- Molecular Biology
- Cancer Research
Background:
- Mitochondrial DNA (mtDNA) mutations are implicated in human cancers.
- The first-generation MitoChip enabled rapid mtDNA analysis but lacked coverage of the D-loop region, a common mutation site.
Purpose of the Study:
- To develop a second-generation MitoChip (v2.0) for comprehensive sequencing of the entire mitochondrial genome.
- To enhance the detection of mtDNA variants, including those in the noncoding D-loop region.
Main Methods:
- Development of MitoChip v2.0 with probes for the complete mitochondrial genome.
- Redundant tiling for common haplotypes, including single-nucleotide changes, insertions, and deletions.
- Sequencing of 14 head and neck tumor tissues and comparison with matched lymphocyte DNA.
Main Results:
- MitoChip v2.0 detected a greater number of mtDNA variants compared to the first generation.
- 31 variations in the noncoding D-loop region were identified.
- MitoChip v2.0 detected cancer-associated mitochondrial mutations in 57% of head and neck cancer samples.
Conclusions:
- The second-generation MitoChip (v2.0) is a high-throughput platform for comprehensive mitochondrial genome sequencing.
- MitoChip v2.0 significantly improves the identification of mtDNA mutations in primary tumors, including cancer-associated variants.
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