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Nonsense-mediated mRNA decay: a key regulatory system engaged in cancer
Hongyu Pan1,2, Xinyu Wu3, Bingshuang Hu1,2
1Department of Pathology and Pathophysiology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, 610500, China.
Abstract:
Nonsense-mediated mRNA decay (NMD) is a critical cellular surveillance mechanism that prevents the translation of defective or deleterious proteins. The regulation of NMD, including both its activation and the evasion of its target mRNA, is intricately linked to tumorigenesis. When NMD becomes overactivated, it can downregulate tumor suppressor transcripts, or eliminate immunogenic peptides, thereby promoting tumor growth and immune evasion. In contrast, reduced or defective NMD can stabilize mutated oncogene transcripts and drive tumor progression. This review provides a comprehensive overview of the physiological mechanisms of NMD, its diverse substrate features, and its regulatory dynamics. We further focus on recent advances in clarifying the interplay between NMD and tumor biology. By integrating the current findings, we aim to provide an insightful understanding of how NMD contributes to tumor initiation, tumor progression, and immune modulation.
Insights
Nonsense-mediated mRNA decay (NMD) is a cellular surveillance system. Dysregulation of NMD impacts cancer by affecting tumor suppressor and oncogene transcripts, influencing tumor growth and immune response.
Area of Science:
- Molecular Biology
- Cellular Biology
- Cancer Biology
Background:
- Nonsense-mediated mRNA decay (NMD) is a crucial cellular surveillance pathway that degrades aberrant mRNAs.
- NMD plays a dual role in tumorigenesis, with its dysregulation potentially promoting or inhibiting cancer development.
- Understanding NMD's complex interplay with cancer biology is essential for therapeutic development.
Purpose of the Study:
- To provide a comprehensive overview of NMD's physiological mechanisms and regulatory dynamics.
- To elucidate the intricate relationship between NMD and various aspects of tumor biology.
- To highlight recent advances in NMD research concerning cancer initiation, progression, and immune modulation.
Main Methods:
- Literature review and synthesis of existing research on NMD.
- Analysis of NMD's role in regulating tumor suppressor and oncogene transcripts.
- Integration of findings on NMD's impact on tumor growth and immune evasion.
Main Results:
- NMD dysregulation significantly influences cancer development through altered transcript stability.
- Overactivated NMD can suppress tumor growth by degrading tumor suppressors and promoting immune evasion.
- Defective NMD can accelerate tumor progression by stabilizing oncogenic transcripts.
Conclusions:
- NMD is a critical regulator in cancer initiation, progression, and immune modulation.
- Targeting NMD pathways presents a potential therapeutic strategy for cancer treatment.
- Further research is needed to fully unravel the complex roles of NMD in diverse cancer types.
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