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Integrated Deadenylase Genetic Association Network and Transcriptome Analysis in Thoracic Carcinomas
Athanasios Kyritsis1,2, Eirini Papanastasi1, Ioanna Kokkori2,3
1Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 415 00 Larissa, Greece.
Abstract:
The poly(A) tail at the 3' end of mRNAs determines their stability, translational efficiency, and fate. The shortening of the poly(A) tail, and its efficient removal, triggers the degradation of mRNAs, thus, regulating gene expression. The process is catalyzed by a family of enzymes, known as deadenylases. As the dysregulation of gene expression is a hallmark of cancer, understanding the role of deadenylases has gained additional interest. Herein, the genetic association network shows that CNOT6 and CNOT7 are the most prevalent and most interconnected nodes in the equilibrated diagram. Subsequent silencing and transcriptomic analysis identifies transcripts possibly regulated by specific deadenylases. Furthermore, several gene ontologies are enriched by common deregulated genes. Given the potential concerted action and overlapping functions of deadenylases, we examined the effect of silencing a deadenylase on the remaining ones. Our results suggest that specific deadenylases target unique subsets of mRNAs, whilst at the same time, multiple deadenylases may affect the same mRNAs with overlapping functions.
Insights
Deadenylases regulate gene expression by controlling mRNA stability. This study reveals specific deadenylases target unique mRNAs, while others have overlapping functions, impacting cancer gene dysregulation.
Area of Science:
- Molecular Biology
- Gene Regulation
- Biochemistry
Background:
- Poly(A) tail shortening is crucial for mRNA degradation and gene expression regulation.
- Deadenylases are key enzymes catalyzing poly(A) tail removal.
- Dysregulated gene expression is a hallmark of cancer, highlighting the importance of deadenylase research.
Purpose of the Study:
- To investigate the roles of specific deadenylases in gene expression.
- To explore the potential concerted and overlapping functions of deadenylases.
- To identify mRNA targets and enriched gene ontologies associated with deadenylase activity.
Main Methods:
- Genetic association network analysis to identify key deadenylase nodes (CNOT6, CNOT7).
- Gene silencing and transcriptomic analysis to determine mRNA regulation.
- Bioinformatic analysis of enriched gene ontologies.
Main Results:
- CNOT6 and CNOT7 identified as highly prevalent and interconnected deadenylases.
- Specific deadenylases were found to regulate distinct subsets of transcripts.
- Evidence suggests multiple deadenylases can target the same mRNAs, indicating overlapping functions.
Conclusions:
- Deadenylases exhibit both specific and overlapping roles in mRNA regulation.
- Understanding these complex interactions is vital for deciphering gene dysregulation in cancer.
- Further research into deadenylase networks can uncover novel therapeutic targets.
