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Related Experiment Video

Updated: Jun 23, 2026

Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing
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A Quantitative Approach to Mapping Mitochondrial Specialization and Plasticity.

Anna S Monzel1, Jack Devine1, Darshana Kapri1

  • 1Division of Behavioral Medicine, Department of Psychiatry, Columbia University Irving Medical Center, New York, NY, USA.

Biorxiv : the Preprint Server for Biology
|February 20, 2025
PubMed
Summary
This summary is machine-generated.

Mitochondria exhibit diverse molecular specializations, termed mitotypes. This study introduces a pipeline to quantify mitochondrial diversity and plasticity, revealing tissue-specific patterns and changes during aging and in response to perturbations.

Keywords:
community resourcecomputationalcultured cellsmitochondrionmulti-organ

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Area of Science:

  • Cell Biology
  • Mitochondrial Biology
  • Systems Biology

Background:

  • Mitochondria are essential organelles with diverse functions, but their molecular specialization (mitotypes) is not fully understood.
  • Existing methods lack a quantitative approach to assess mitochondrial diversity across different contexts.
  • Understanding mitochondrial plasticity is crucial for comprehending cellular function, aging, and disease.

Purpose of the Study:

  • To develop and validate a quantitative pipeline for defining and measuring mitochondrial phenotypes (mitotypes).
  • To analyze mitochondrial diversity and plasticity in various biological contexts using transcriptomics and proteomics data.
  • To provide a tool for researchers to explore and interpret mitochondrial specialization.

Main Methods:

  • Developed a quantitative pipeline using hundreds of validated mitochondrial genes/proteins.
  • Distilled data into 149 biologically interpretable MitoPathway scores (MitoCarta 3.0).
  • Applied the pipeline to transcriptomics and proteomics data from mouse and human tissues, and cultured human fibroblasts.

Main Results:

  • Identified two main axes of mitochondrial specialization in mouse and human organs, contrasting anabolic (liver) and catabolic (brain) tissues.
  • Demonstrated that fibroblast mitotypes change over time, correlating with aging hallmarks.
  • Showcased mitotype recalibration in response to genetic, pharmacological, and metabolic perturbations.

Conclusions:

  • The developed mitotyping pipeline enables quantitative assessment of mitochondrial diversity and plasticity.
  • Mitotype analysis reveals fundamental differences in mitochondrial specialization across tissues and dynamic changes during aging and in response to stimuli.
  • MitotypeExplorer.org provides a valuable resource for researchers to interpret mitochondrial biology.