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Updated: May 9, 2026
Visualizing and Quantifying Endonuclease-Based Site-Specific DNA Damage
Published on: August 21, 2021
Post-transcriptional regulation of DNA damage-responsive gene expression
1Department of Biology, Institute of Biochemistry, Carleton University , Ottawa, Canada .
Significance:
Production of proteins requires the synthesis, maturation, and export of mRNAs before their translation in the cytoplasm. Endogenous and exogenous sources of DNA damage pose a challenge to the co-ordinated regulation of gene expression, because the integrity of the DNA template can be compromised by DNA lesions. Cells recognize and respond to this DNA damage through a variety of DNA damage responses (DDRs). Failure to deal with DNA damage appropriately can lead to genomic instability and cancer.
Recent Advances:
The p53 tumor suppressor plays a dominant role in DDR-dependent changes in gene expression, but this transcription factor is not solely responsible for all changes. Recent evidence indicates that RNA metabolism is integral to DDRs as well. In particular, post-transcriptional processes are emerging as important contributors to these complex responses.
Critical Issues:
Transcriptional, post-transcriptional, and translational regulation of gene expression is subject to changes in response to DNA damage. How these processes are intertwined in the unfolding of DDR is not fully understood.
Future Directions:
Many complex regulatory responses combine to determine cell fate after DNA damage. Understanding how transcriptional, post-transcriptional, and translational processes interdigitate to create a web of regulatory interactions will be one of the key challenges to fully understand DDRs.
Insights
DNA damage responses (DDRs) involve intricate gene expression regulation. Understanding how RNA metabolism and transcription interact is crucial for cell fate determination after DNA damage.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- DNA damage triggers complex cellular responses to maintain genomic integrity.
- The p53 tumor suppressor is key in DNA damage responses (DDRs), but not the sole regulator.
- Emerging evidence highlights the critical role of RNA metabolism in DDRs, particularly post-transcriptional regulation.
Purpose of the Study:
- To explore the intricate interplay between transcriptional, post-transcriptional, and translational regulation during DNA damage responses.
- To elucidate how these regulatory layers collectively influence cell fate following DNA damage.
Main Methods:
- This study integrates findings from various research investigating gene expression changes post-DNA damage.
- Focuses on analyzing the coordination of mRNA synthesis, maturation, export, and translation.
Main Results:
- Gene expression regulation at transcriptional, post-transcriptional, and translational levels is altered by DNA damage.
- The precise mechanisms by which these regulatory processes are intertwined in DDRs remain incompletely understood.
Conclusions:
- Cell fate after DNA damage is determined by a complex network of regulatory responses.
- Deciphering the interconnections between transcriptional, post-transcriptional, and translational processes is essential for a comprehensive understanding of DDRs.
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