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Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model
Published on: May 27, 2016
Monitoring radiation exposure through skin swab multi-omic profiling
Geraldine Vitry1, Jerry Angdisen1, Pauline Arriaga2
1Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, District of Columbia, United States of America.
Plos One
|August 5, 2026
Summary
Skin swab analysis reveals distinct metabolite and microbial signatures following radiation exposure. These findings support the development of non-invasive biodosimetry tools for assessing radiation dose.
Area of Science:
- Radiation biology
- Genomics and multi-omics
- Skin microbiome research
Background:
- Ionizing radiation exposure presents significant health risks in various settings, necessitating effective biodosimetry.
- The skin, as the body's largest organ and primary site of radiation injury, offers a unique opportunity for monitoring exposure.
- Current biodosimetry methods often lack the speed and non-invasive nature required for rapid assessment.
Purpose of the Study:
- To investigate the potential of skin swab multi-omic profiles for non-invasive radiation biodosimetry.
- To identify specific molecular and microbial signatures associated with radiation exposure and dose.
- To establish a framework for developing skin-based radiation monitoring tools.
Main Methods:
- Utilized colonized human skin equivalents (coHSE) and mouse models exposed to varying doses of x-ray radiation (0, 1, and 4 Gy).
- Performed integrated metabolomic, lipidomic, and metagenomic profiling on skin swab samples.
- Analyzed data to identify distinct metabolite panels and microbial community shifts.
Main Results:
- Identified metabolite panels capable of distinguishing irradiated from non-irradiated skin and differentiating radiation doses.
- Discovered conserved radiation-responsive metabolites (e.g., uric acid, xanthine, taurine) and skin barrier integrity markers (e.g., proline, arginine).
- Observed diacylglycerol network enrichment and an increase in radioprotective microbial taxa (e.g., Lachnospiraceae, Lactobacillales), indicating a repair response.
Conclusions:
- Skin swab signatures demonstrate feasibility for non-invasive radiation exposure classification.
- A molecular and microbial framework for skin-based monitoring has been established.
- Further validation in human cohorts is warranted for real-world biodosimetry applications.
