Related Experiment Video
Updated: Sep 17, 2025
08:38
Targeted DNA Methylation Analysis by Next-generation Sequencing
Published on: February 24, 2015
37.3K
Multidimensional third-generation sequencing of modified DNA bases allows interrogation of complex biological systems
Serena S David1, Brendan A Pacheco1, Kensei Kishimoto1
1Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA.
Nature Communications
|July 2, 2025
Summary
This study introduces a cost-effective method for sequencing novel DNA bases, enabling multidimensional analysis of DNA modifications. This advance allows researchers to study mitochondrial mutations, infection dynamics, and cancer cell DNA at the single-molecule level.
Area of Science:
- Genomics
- Molecular Biology
- Biochemistry
Background:
- DNA modifications are crucial for biological function but are poorly captured by standard sequencing.
- Third-generation sequencing can detect modified bases, but is limited by cost and complexity for novel base identification.
Purpose of the Study:
- To develop an accessible and cost-effective method for sequencing novel DNA bases.
- To enable multidimensional sequencing for retrieving both biological and experimental information from DNA.
Main Methods:
- A barcoded split-pool synthesis approach was used to create reference standard oligonucleotides.
- This method facilitates the training of sequencing technologies for novel base detection.
Main Results:
- Demonstrated the ability to characterize preferential replication of mitochondrial genome mutations.
- Enabled analysis of host-pathogen infection dynamics.
- Assessed the impact of chemotherapy on cancer cell DNA at the single-molecule level.
Conclusions:
- The presented method is low-cost, experimentally simple, and widely accessible.
- This technique unlocks new possibilities for complex experimental interrogations across biological sciences.
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