Measuring Single-Cell Mitochondrial DNA Copy Number and Heteroplasmy Using Digital Droplet Polymerase Chain Reaction

Stephen  P. Burr; Patrick F. Chinnery

doi:10.3791/63870

Измерение количества копий одноклеточной митохондриальной ДНК и гетероплазмы с помощью цифровой к...

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Measuring Single-Cell Mitochondrial DNA Copy Number and Heteroplasmy Using Digital Droplet Polymerase Chain Reaction

Измерение количества копий одноклеточной митохондриальной ДНК и гетероплазмы с помощью цифровой капельно-полимеразной цепной реакции

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09:15 min

July 12, 2022

DOI: 10.3791/63870-v

Stephen P. Burr^1,2, Patrick F. Chinnery^1,2

¹Department of Clinical Neurosciences, School of Clinical Medicine,University of Cambridge, Cambridge Biomedical Campus, ²Medical Research Council Mitochondrial Biology Unit,University of Cambridge, Cambridge Biomedical Campus

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Overview

This protocol allows for the accurate measurement of mitochondrial DNA (mtDNA) copy number and deletion heteroplasmy levels in individual cells. This technique is particularly beneficial for researchers studying mitochondrial function and mutations.

Key Study Components

Area of Science

Neuroscience
Cell Biology
Molecular Biology

Background

Mitochondrial DNA plays a crucial role in cellular energy production.
Previous methods focused on tissue samples, limiting single-cell analysis.
Understanding mtDNA mutations is essential for various biological studies.
Effective isolation of single cells is critical for this protocol.

Purpose of Study

To measure mtDNA copy number in single cells.
To assess levels of mtDNA deletion heteroplasmy.
To provide a reliable method for mitochondrial research.

Methods Used

Isolation of single cells.
Lysis of cells to extract mtDNA.
Quantitative analysis of mtDNA copy number.
Assessment of mtDNA mutations.

Main Results

Successful measurement of mtDNA in single cells.
Identification of deletion heteroplasmy levels.
Demonstrated advantages over previous tissue-based methods.
Potential applications in mitochondrial research.

Conclusions

This protocol enhances the understanding of mitochondrial dynamics.
It opens new avenues for studying mitochondrial diseases.
Future research can build on this method for deeper insights.

Frequently Asked Questions

What is the main advantage of this protocol?

The main advantage is the ability to measure mtDNA in single cells, providing more precise data compared to tissue samples.

Is prior experience with single cell sorting necessary?

Yes, previous experience with single cell sorting is helpful for effective isolation and lysis of cells.

What types of mutations can be assessed?

This protocol allows for the assessment of specific types of mitochondrial DNA mutations, including deletions.

What areas of research can benefit from this method?

Research in mitochondrial function, diseases, and cellular energy metabolism can benefit significantly from this method.

How does this method compare to previous techniques?

This method provides a more accurate analysis at the single-cell level, unlike previous techniques that focused on bulk tissue samples.

Can this protocol be used for other types of cells?

While designed for mitochondrial analysis, the protocol may be adapted for other cell types with similar requirements.

Здесь мы представляем протокол измерения абсолютного числа копий митохондриальной (мт)ДНК и уровней гетероплазмы делеции мтДНК в отдельных клетках.

Этот протокол может быть использован для точного измерения количества копий митохондриальной ДНК, присутствующих в отдельных клетках, и уровня определенных типов мутаций митохондриальной ДНК. Предыдущие методы могут точно проводить эти измерения в образцах тканей, содержащих много клеток. Основным преимуществом этой методики является то, что мы можем производить одинаковые измерения в отдельных клетках.

Этот метод особенно полезен для тех, кто изучает митохондрии, и будет иметь широкое применение в этой области. Эффективное выделение и лизис отдельных клеток является ключом к этой технике. Предыдущий опыт сортировки одной ячейки был бы очень полезен.

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