Autofluorescence as a measure of senescence in C. elegans: look to red, not blue or green
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In C. elegans, intestinal autofluorescence (sometimes referred to as lipofuscin or "age pigment") accumulates with age and is often used as a marker of health or the rate of aging. We show that this autofluorescent material is spectrally heterogeneous, and that materials that fluoresce under different excitation wavelengths have distinct biological properties. Red autofluorescence (visible with a TRITC filter set) correlates well with an individual's remaining days of life, and is therefore a candidate marker of health. In contrast, blue autofluorescence (via a DAPI filter set) is chiefly an indicator of an individual's incipient or recent demise. Thus, population averages of blue fluorescence essentially measure the fraction of dead or near-dead individuals. This is related to but distinct from the health of the living population. Green autofluorescence (via a FITC or GFP filter set) combines both properties, and is therefore ill suited as a marker of either death or health. Moreover, our results show that care must be taken to distinguish GFP expression near the time of death from full-body green autofluorescence. Finally, none of this autofluorescence increases after oxidative stress, suggesting that the material, or its biology in C. elegans, is distinct from lipofuscin as reported in the mammalian literature.
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C. elegans intestinal autofluorescence is an indicator of the individual's apparent age and thus linked to the "health-span" of the population.
“C. elegans intestinal autofluorescence is an indicator of the individual’s apparent age and thus linked to the “health-span” of the population.39,40”
From Bacopa monnieri (L.) wettst. Extract protects against glutamate toxicity and increases the longevity of Caenorhabditis elegans (2020) · cites this paper as [39]
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- Authors
- Pincus, Z., Mazer, T. C., & Slack, F. J.
- Affiliations
- Washington University in St. Louis (US)
- Beth Israel Deaconess Medical Center (US)
- Corresponding author
- Pincus, Zachary
- Venue
- Aging
- Publisher
- Impact Journals, LLC
- Published
- 2016-04-10
- Volume
- 8
- Issue
- 5
- Pages
- 889-898
- ISSN
- 1945-4589 (ISSN-L)
- PMC
- PMC4931842
- OpenAlex
- W2335974826
- Cited by
- 153
- References
- 27
- Citations by year
- 2026: 8 · 2025: 25 · 2024: 20 · 2023: 19 · 2022: 13 · 2021: 24 · 2020: 11 · 2019: 11 · 2018: 15 · 2017: 4 · 2016: 2
- FWCI
- 5.77
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- cc-by
- Locations
- Aging (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Digital Commons@Becker (Washington University School of Medicine) (submittedVersion, cc-by)
- Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
- Funders
- National Institute on Aging (R01AG033921, K99AG042487, R00AG042487)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
- Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
- Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
- Keywords
- autofluorescence, Caenorhabditis elegans, senescence, lipofuscin, excitation wavelength, mortality, GFP expression, oxidative stress
- MeSH terms
- Animals, Microscopy, Fluorescence, Cellular Senescence, Caenorhabditis elegans, Oxidative Stress
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