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Updated: Jun 26, 2025

Detection of Alternative Splicing During Epithelial-Mesenchymal Transition
Published on: October 9, 2014
Deciphering the role of alternative splicing in neoplastic diseases for immune-oncological therapies
Marcus Bauer1, Chiara-Maria Schöbel2, Claudia Wickenhauser1
1Institute of Pathology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.
Abstract:
Alternative splicing (AS) is an important molecular biological mechanism regulated by complex mechanisms involving a plethora of cis and trans-acting elements. Furthermore, AS is tissue specific and altered in various pathologies, including infectious, inflammatory, and neoplastic diseases. Recently developed immuno-oncological therapies include monoclonal antibodies (mAbs) and chimeric antigen receptor (CAR) T cells targeting, among others, immune checkpoint (ICP) molecules. Despite therapeutic successes have been demonstrated, only a limited number of patients showed long-term benefit from these therapies with tumor entity-related differential response rates were observed. Interestingly, splice variants of common immunotherapeutic targets generated by AS are able to completely escape and/or reduce the efficacy of mAb- and/or CAR-based tumor immunotherapies. Therefore, the analyses of splicing patterns of targeted molecules in tumor specimens prior to therapy might help correct stratification, thereby increasing therapy success by antibody panel selection and antibody dosages. In addition, the expression of certain splicing factors has been linked with the patients' outcome, thereby highlighting their putative prognostic potential. Outstanding questions are addressed to translate the findings into clinical application. This review article provides an overview of the role of AS in (tumor) diseases, its molecular mechanisms, clinical relevance, and therapy response.
Insights
Alternative splicing generates variants of cancer targets, impacting immunotherapy effectiveness. Analyzing splicing patterns may improve patient selection and treatment strategies for better outcomes.
Area of Science:
- Molecular Biology
- Immunology
- Oncology
Background:
- Alternative splicing (AS) is a key molecular mechanism influencing gene expression.
- AS is tissue-specific and dysregulated in various diseases, including cancers.
- Immuno-oncological therapies like monoclonal antibodies (mAbs) and chimeric antigen receptor (CAR) T cells show promise but have limited efficacy in many patients.
Purpose of the Study:
- To review the role of alternative splicing in cancer and its impact on immunotherapy.
- To explore the molecular mechanisms of AS and its clinical relevance.
- To discuss the potential of AS analysis for improving cancer therapy response.
Main Methods:
- Literature review of alternative splicing mechanisms and their role in cancer.
- Analysis of how splice variants affect the efficacy of immunotherapies (mAbs, CAR T cells).
- Examination of the prognostic potential of splicing factors in cancer patients.
Main Results:
- Alternative splicing generates splice variants of immunotherapeutic targets, leading to immune evasion and reduced therapy efficacy.
- Splicing patterns of targeted molecules can influence patient stratification and treatment response.
- Certain splicing factors correlate with patient outcomes, suggesting prognostic value.
Conclusions:
- Understanding alternative splicing is crucial for optimizing cancer immunotherapy.
- Analyzing splicing patterns in tumors may enable better patient selection and personalized treatment strategies.
- Further research is needed to translate AS findings into clinical applications for improved cancer patient outcomes.
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