Related Experiment Video
Updated: May 12, 2026
03:20
Studying Chronic Exposure of Mice to Ultraviolet B Radiation
Published on: August 19, 2025
Baicalin modulates microRNA expression in UVB irradiated mouse skin
Yang Xu1, Bingrong Zhou, Di Wu
1Department of Dermatology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China.
Journal of Biomedical Research
|April 5, 2013
Summary
This study investigated how ultraviolet radiation B (UVB) affects microRNA (miRNA) expression in mouse skin, finding that baicalin treatment altered specific miRNA levels. These findings suggest potential therapeutic strategies for UVB-induced skin damage.
Area of Science:
- Dermatology and Molecular Biology
- Photobiology
- Gene Expression Regulation
Background:
- Ultraviolet radiation B (UVB) exposure causes significant skin damage, including photodamage and photocarcinogenesis.
- MicroRNAs (miRNAs) play crucial roles in regulating cellular processes and are implicated in various skin conditions.
- Baicalin, a flavonoid, possesses potential therapeutic properties, but its effects on UVB-induced miRNA changes require elucidation.
Purpose of the Study:
- To investigate the impact of UVB irradiation on miRNA expression profiles in mouse skin.
- To evaluate the modulatory effects of baicalin on UVB-induced miRNA alterations.
- To predict the functional roles of deregulated miRNAs in the context of photodamage and potential therapeutic interventions.
Main Methods:
- Comparative miRNA expression profiling in three groups: untreated mice, UVB-irradiated mice, and baicalin-treated UVB-irradiated mice.
- Bioinformatic analyses including TargetScan and Gene Ontology (GO) to predict miRNA targets and associated pathways.
- Identification and quantification of differentially expressed miRNAs in response to UVB and baicalin treatment.
Main Results:
- UVB irradiation led to significant downregulation of mmu-miR-125a-5p, mmu-miR-146a, and mmu-miR-141, and upregulation of mmu-miR-188-5p, mmu-miR-223, and mmu-miR-22.
- These UVB-affected miRNAs were predicted to be involved in photocarcinogenesis, hypomethylation, and apoptosis.
- Baicalin treatment reversed some UVB-induced miRNA changes, downregulating mmu-miR-378, mmu-miR-199a-3p, and mmu-miR-181b, and upregulating mmu-miR-23a, which were linked to DNA repair pathways.
Conclusions:
- UVB irradiation significantly alters miRNA expression in mouse skin, impacting pathways related to photodamage.
- Baicalin demonstrates a modulatory effect on UVB-induced miRNA dysregulation, potentially through influencing DNA repair mechanisms.
- The identified miRNAs represent potential biomarkers and therapeutic targets for preventing and treating UVB-induced dermatoses.
