Related Experiment Video
Updated: Jun 6, 2025
05:29
Imaging and Quantifying Mitochondrial Morphology in C. elegans During Aging
Published on: January 17, 2025
791
Endogenous mitochondrial NAD(P)H fluorescence can predict lifespan
Christopher S Morrow1, Pallas Yao1, Carlos A Vergani-Junior1,2
1Department of Molecular Metabolism, Harvard TH Chan School of Public Health, Boston, MA, USA.
Communications Biology
|November 21, 2024
Summary
Researchers developed novel "mito-NAD(P)H age clocks" using non-destructive imaging to measure mitochondrial changes. These clocks accurately predict biological age and lifespan by analyzing nicotinamide adenine dinucleotide phosphate (NAD(P)H) fluorescence in mitochondria.
Area of Science:
- Biophysics
- Cellular Biology
- Gerontology
Background:
- Aging clocks are crucial for predicting health outcomes and understanding aging heterogeneity.
- Existing methods face limitations like low resolution, long processing times, sample destruction, and phenotype bias.
Purpose of the Study:
- To introduce a non-destructive, label-free, subcellular resolution method for aging quantification.
- To develop novel aging prediction models based on mitochondrial biophysical properties.
Main Methods:
- Utilized fluorescence lifetime imaging (FLIM) of endogenous NAD(P)H fluorescence.
- Quantified age-dependent biophysical changes in mitochondrial NAD(P)H.
- Constructed cellular resolution aging prediction models ('mito-NAD(P)H age clocks').
Main Results:
- Uncovered age-dependent changes in mitochondrial NAD(P)H across tissues in C. elegans, linked to physiological decline.
- Mito-NAD(P)H age clocks accurately predicted age, resolved aging rate heterogeneity, and estimated remaining lifespan.
- Revealed spatiotemporal asynchrony in mitochondrial aging and identified attenuated changes associated with longevity.
Conclusions:
- Mitochondrial NAD(P)H FLIM offers a high-resolution, non-destructive approach to aging research.
- Mito-NAD(P)H age clocks provide a powerful new tool for quantifying aging and its heterogeneity.
- This method enhances understanding of mitochondrial aging mechanisms and expands aging assessment capabilities.
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