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Updated: Feb 7, 2026

Using RNA-sequencing to Detect Novel Splice Variants Related to Drug Resistance in In Vitro Cancer Models
Published on: December 9, 2016
Taking advantage of drug resistance, a new approach in the war on cancer
1Division of Molecular Carcinogenesis, Oncode Institute, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands.
Abstract:
Identification of the driver mutations in cancer has resulted in the development of a new category of molecularly targeted anti-cancer drugs. However, as was the case with conventional chemotherapies, the effectiveness of these drugs is limited by the emergence of drug-resistant variants. While most cancer therapies are given in combinations that are designed to avoid drug resistance, we discuss here therapeutic approaches that take advantage of the changes in cancer cells that arise upon development of drug resistance. This approach is based on notion that drug resistance comes at a fitness cost to the cancer cell that can be exploited for therapeutic benefit.We discuss the development of sequential drug therapies in which the first therapy is not given with curative intent, but to induce a major new sensitivity that can be targeted with a second drug that selectively targets the acquired vulnerability. This concept of collateral sensitivity has hitherto not been used on a large scale in the clinic and holds great promise for future cancer therapy.
Insights
Drug resistance in cancer can be overcome by sequential therapies. This approach exploits cancer cells' acquired vulnerabilities, offering a promising new strategy for cancer treatment.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Molecularly targeted cancer drugs have emerged due to identified driver mutations.
- Drug resistance remains a significant limitation, mirroring challenges seen with conventional chemotherapy.
- Existing combination therapies aim to prevent resistance, but this study explores exploiting resistance itself.
Purpose of the Study:
- To explore therapeutic strategies that leverage cancer cell changes resulting from drug resistance.
- To investigate the concept of collateral sensitivity for novel cancer treatment approaches.
- To present sequential drug therapies as a viable clinical strategy.
Main Methods:
- Reviewing therapeutic approaches that exploit the fitness cost associated with cancer drug resistance.
- Discussing the development and application of sequential drug therapies.
- Highlighting the concept of inducing drug sensitivity through initial non-curative treatments.
Main Results:
- Drug resistance can impose a fitness cost on cancer cells, creating exploitable vulnerabilities.
- Sequential drug administration, where the first drug induces sensitivity to the second, is a promising strategy.
- The concept of collateral sensitivity offers a novel therapeutic avenue.
Conclusions:
- Exploiting drug-induced vulnerabilities in cancer cells presents a promising therapeutic strategy.
- Sequential drug therapies, utilizing collateral sensitivity, hold significant potential for clinical application in cancer treatment.
- This approach offers a new paradigm beyond conventional combination therapies for overcoming drug resistance.
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