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Updated: Jun 24, 2026

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts
Published on: July 25, 2020
Linking somatic genetic alterations in cancer to therapeutics
Darrin Stuart1, William R Sellers
1Oncology Disease Area, Novartis Institutes for BioMedical Research, Emeryville, CA 94608, USA. Darrin.Stuart@novartis.com
Abstract:
Somatic genetic alterations provide the foundation for the evolution of human tumors as well as significant opportunity for therapeutic intervention. This review will cover the growing list of examples where somatic genetic alterations have successfully been coupled with a targeted agent resulting in positive clinical outcome. For example, recent data from randomized clinical trials support the earlier observations that EGFR mutant lung tumors are most likely to respond to EGFR kinase inhibitors, while wild-type tumors rarely respond. Emerging data indicate that this principle may also apply to such intractable diseases such as melanoma which has long been refractory to conventional chemotherapeutics.
Insights
Targeted therapies are revolutionizing cancer treatment by exploiting specific genetic alterations. Identifying these mutations, like those in EGFR for lung cancer, guides effective drug selection for better patient outcomes.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
- Pharmacology
Background:
- Somatic genetic alterations are key drivers in human tumor evolution.
- These alterations present significant opportunities for targeted therapeutic interventions.
- Understanding tumor genetics is crucial for developing effective cancer treatments.
Purpose of the Study:
- To review successful examples of coupling somatic genetic alterations with targeted agents.
- To highlight positive clinical outcomes achieved through precision oncology.
- To explore the potential of targeted therapies in previously intractable cancers like melanoma.
Main Methods:
- Review of existing literature and clinical trial data.
- Analysis of randomized clinical trials focusing on targeted therapies.
- Examination of specific genetic mutations and their corresponding drug responses.
Main Results:
- EGFR mutant lung tumors show high response rates to EGFR kinase inhibitors.
- Tumors with wild-type EGFR show minimal response to these inhibitors.
- Emerging data suggest similar targeted therapy efficacy in melanoma.
Conclusions:
- Targeted therapies based on somatic genetic alterations are highly effective in specific cancer types.
- Precision medicine, guided by genetic profiling, offers a promising therapeutic strategy.
- This approach holds potential for treating challenging cancers like melanoma.
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