Related Experiment Video
Updated: Aug 14, 2025

Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells
Published on: April 26, 2017
RNA splicing dysregulation and the hallmarks of cancer
Robert K Bradley1, Olga Anczuków2,3
1Computational Biology Program, Public Health Sciences Division and Basic Sciences Division, Fred Hutchinson Cancer Center, Seattle, WA, USA. rbradley@fredhutch.org.
Abstract:
Dysregulated RNA splicing is a molecular feature that characterizes almost all tumour types. Cancer-associated splicing alterations arise from both recurrent mutations and altered expression of trans-acting factors governing splicing catalysis and regulation. Cancer-associated splicing dysregulation can promote tumorigenesis via diverse mechanisms, contributing to increased cell proliferation, decreased apoptosis, enhanced migration and metastatic potential, resistance to chemotherapy and evasion of immune surveillance. Recent studies have identified specific cancer-associated isoforms that play critical roles in cancer cell transformation and growth and demonstrated the therapeutic benefits of correcting or otherwise antagonizing such cancer-associated mRNA isoforms. Clinical-grade small molecules that modulate or inhibit RNA splicing have similarly been developed as promising anticancer therapeutics. Here, we review splicing alterations characteristic of cancer cell transcriptomes, dysregulated splicing's contributions to tumour initiation and progression, and existing and emerging approaches for targeting splicing for cancer therapy. Finally, we discuss the outstanding questions and challenges that must be addressed to translate these findings into the clinic.
Insights
Cancer cells exhibit altered RNA splicing, driving tumor growth and spread. Targeting these splicing defects offers promising new cancer therapies by correcting or blocking abnormal mRNA isoforms.
Area of Science:
- Molecular Biology
- Oncology
- Genetics
Background:
- Dysregulated RNA splicing is a hallmark of nearly all cancer types.
- Alterations in splicing stem from mutations and changes in regulatory factors.
- Splicing dysregulation promotes cancer by affecting cell growth, death, migration, and immune evasion.
Purpose of the Study:
- To review RNA splicing alterations in cancer.
- To discuss the role of splicing dysregulation in tumor initiation and progression.
- To explore current and future therapeutic strategies targeting RNA splicing in cancer.
Main Methods:
- Literature review of cancer-associated splicing alterations.
- Analysis of mechanisms by which splicing dysregulation promotes tumorigenesis.
- Examination of therapeutic approaches targeting cancer-associated mRNA isoforms and splicing factors.
Main Results:
- Identified specific cancer-associated splicing alterations and isoforms crucial for cancer development.
- Highlighted the therapeutic potential of correcting or inhibiting these splicing defects.
- Noted the development of clinical-grade small molecules for modulating RNA splicing as anticancer agents.
Conclusions:
- RNA splicing alterations are fundamental to cancer biology.
- Targeting RNA splicing presents a promising therapeutic avenue for cancer treatment.
- Further research is needed to translate splicing-based therapies into clinical practice.
Related Concept Videos
RNA Splicing
Alternative RNA Splicing
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
Chromatin Structure Regulates pre-mRNA Processing
The chromatin structure, especially...
Nucleotide Excision Repair
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Nuclear Export of mRNA
Nonsense-mediated mRNA Decay
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...

