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Fluorescence-Based Detection of Ferrous Iron in Senescent Cells
Kyle J Parella1,2,3, Charles Manhardt1, Danny Capucilli1
1Ichor Life Sciences, Inc., Lafayette, New York, USA.
Rejuvenation Research
|November 29, 2021
Summary
Researchers explored intracellular ferrous iron (Fe2+) as a novel biomarker for cellular senescence. A new probe, SiRhoNox-1, selectively labels senescent cells, offering a faster and more specific detection method for aging research.
Area of Science:
- Biomarkers
- Aging Research
- Cellular Senescence
Background:
- Aging research lacks reliable biomarkers for phenotypic changes and anti-aging intervention responses.
- Intracellular ferrous iron (Fe2+) accumulation is observed with age and significantly increases in senescent cells.
- Current iron measurement techniques are cumbersome and do not distinguish specific reactive iron isotopes like Fe2+.
Purpose of the Study:
- To investigate the potential of intracellular ferrous iron (Fe2+) as a biomarker for cellular senescence.
- To evaluate a newly discovered Fe2+-reactive probe, SiRhoNox-1, for selective labeling of senescent cells in vitro.
Main Methods:
- Generated various senescent cell models.
- Applied SiRhoNox-1 probe for selective labeling of senescent cells.
- Compared SiRhoNox-1 performance with established senescence markers (SA-βGal, C12FDG).
Main Results:
- SiRhoNox-1 selectively labeled live senescent cells.
- The probe demonstrated higher specificity and speed compared to SA-βGal and C12FDG.
- Fe2+ levels were confirmed to be elevated in senescent cells.
Conclusions:
- SiRhoNox-1 is a promising tool for detecting senescent cells based on their elevated ferrous iron levels.
- This probe offers a convenient and efficient method for senescence detection in aging research.
