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Related Experiment Video

Updated: May 26, 2025

Imaging and Quantifying Mitochondrial Morphology in C. elegans During Aging
05:29

Imaging and Quantifying Mitochondrial Morphology in C. elegans During Aging

Published on: January 17, 2025

768

A Quantitative Approach to Mapping Mitochondrial Specialization and Plasticity.

Martin Picard1, Anna Monzel2, Jack Devine1

  • 1Columbia University Medical Center.

Research Square
|February 24, 2025
PubMed
Summary
This summary is machine-generated.

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Mitochondria exhibit diverse molecular specializations, termed mitotypes, which can now be quantified. This pipeline reveals how mitotypes vary across organs and change with aging and cellular perturbations.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Mitochondria are essential organelles with diverse functions.
  • Not all mitochondria are identical; they exhibit specialized phenotypes (mitotypes).
  • Understanding mitochondrial diversity is crucial for interpreting cellular states.

Purpose of the Study:

  • To develop a quantitative pipeline for defining and analyzing mitochondrial molecular specialization (mitotypes).
  • To enable the quantification and interpretation of mitochondrial diversity and plasticity from omics data.
  • To explore mitochondrial specialization across different tissues and in response to biological changes.

Main Methods:

  • Developed a quantitative pipeline using 149 biologically interpretable MitoPathway scores (MitoCarta 3.0).
Keywords:
community resourcecomputationalcultured cellsmitochondrionmulti-organ

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  • Applied the pipeline to transcriptomics and proteomics data from various contexts.
  • Analyzed mitotype segregation in mouse and human tissues and in cultured human fibroblasts.

    • Main Results:

    • Mitotypes segregate along anabolic (liver) and catabolic (brain) axes in mouse and human organs.
    • In human fibroblasts, mitotypes recalibrate over time, mirroring aging hallmarks.
    • Mitotypes respond to genetic, pharmacological, and metabolic perturbations in cultured cells.

    Conclusions:

    • The developed pipeline provides a quantitative framework for assessing mitochondrial diversity and plasticity.
    • Mitotype analysis reveals fundamental differences in mitochondrial specialization across tissues.
    • Mitotype dynamics reflect cellular aging and responses to various stimuli, offering insights into mitochondrial biology.