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Chronic Inflammation in Irradiated Mouse Mammary Glands: A Transcriptome Sequencing Analysis
Radiation Research
|July 15, 2026
Summary
Radiation exposure causes chronic inflammation in normal tissues. This study identifies CD163+ macrophages as key mediators of this inflammation in the mouse mammary gland, offering potential radioprotection targets.
Area of Science:
- Radiation Biology
- Immunology
- Tissue Microenvironment Research
Background:
- Normal tissues are susceptible to chronic inflammation following radiation exposure, posing health risks.
- The mouse mammary gland serves as a model to study radiation-induced damage during sensitive developmental stages.
Purpose of the Study:
- To investigate gene expression changes and immune cell dynamics in the irradiated mouse mammary gland.
- To identify specific immune cell subtypes involved in post-irradiation inflammation and metabolic disturbances.
Main Methods:
- Transcriptomic and single-cell RNA sequencing were employed to profile gene expression and immune cell populations.
- Morphological analysis of the mammary gland was combined with transcriptomic data.
- Immunofluorescence staining was used to confirm cell accumulation.
Main Results:
- Specific macrophage and T cell subtypes were identified, modulating inflammation and cell junction homeostasis.
- Dysregulation of adipocyte differentiation and lipid metabolism, linked to oxidative stress, was observed early post-irradiation.
- CD163+ macrophages were found to be functionally enriched in lipid metabolism and accumulated in irradiated tissue.
Conclusions:
- CD163+ macrophages are key mediators of chronic inflammation in the irradiated mammary gland.
- The study characterizes microenvironmental changes post-irradiation and suggests potential targets for radioprotection.
