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Genetic Background Modulates lncRNA-Coordinated Tissue Response to Low Dose Ionizing Radiation
Jonathan Tang1, Yurong Huang1, David H Nguyen1
1Life Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road MS977, Berkeley, CA 94720, USA.
International Journal of Genomics
|March 25, 2015
Summary
Long noncoding RNAs (lncRNAs) regulate cell functions. This study reveals lncRNAs coordinate tissue responses to low-dose ionizing radiation (LDIR), with expression influenced by genetic background.
Area of Science:
- Molecular Biology
- Genomics
- Radiation Biology
Background:
- Long noncoding RNAs (lncRNAs) are critical regulators of cellular processes.
- The role of lncRNAs in response to ionizing radiation is largely unknown.
- Understanding lncRNA function in radiation response is crucial for radiation biology.
Purpose of the Study:
- To investigate the role of lncRNAs in mammary gland response to low-dose ionizing radiation (LDIR).
- To compare lncRNA and mRNA expression profiles in different mouse strains after LDIR exposure.
- To elucidate the regulatory mechanisms of lncRNAs in radiation-induced tissue responses.
Main Methods:
- Microarray profiling of lncRNA and mRNA expression in mammary glands of BALB/c and SPRET/EiJ mice.
- Analysis of differential gene expression following LDIR exposure.
- Correlation analysis between lncRNA and mRNA expression patterns.
- Functional enrichment analysis of LDIR-responsive genes.
Main Results:
- Significant differences in baseline lncRNA expression between mouse strains were observed.
- LDIR exposure induced significant changes in lncRNA expression in both strains.
- Differentially expressed lncRNAs showed correlated expression patterns with LDIR-responsive mRNAs.
- Functional analysis revealed dynamic responses involving tissue injury, inflammation, and development post-LDIR.
Conclusions:
- Genetic background profoundly impacts lncRNA expression and response to radiation.
- lncRNAs play a coordinating role in the mammary gland's response to LDIR.
- lncRNAs may regulate coding mRNAs to mediate radiation responses.
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