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Updated: May 18, 2026

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts
Published on: July 25, 2020
Synergistic antiproliferative and antiangiogenic effects of EGFR and mTOR inhibitors
L Porcelli1, A E Quatrale, P Mantuano
1Clinical Experimental Oncology Laboratory, National Cancer Institute Giovanni Paolo II, Viale O. Flacco, 65, 70124 Bari, Italy.
Abstract:
Single-agent therapy with molecularly targeted agents has shown limited success in tumor growth control, mainly because escape or resistance mechanisms are activated once a signalling molecule is inhibited. Rational combinations of target-specific agents could counteract this response providing a useful strategy in cancer treatment. In this regard, the EGFR and mTOR inhibitors have been used together to generate a synergistic effect and maximize the efficacy of each individual agent. Overall, the in vivo and in vitro evidences support the utilization of combinations targeting EGFR and mTOR, for malignancies characterized by deregulated EGFR/PI3K/Akt/ mTOR signalling cascade; whereas the clinical experience points out that the assessment of the therapeutic value of such combination awaits further investigations.
Insights
Combining EGFR and mTOR inhibitors shows promise for cancer treatment by overcoming resistance. Further clinical studies are needed to confirm the therapeutic value of this targeted therapy approach.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Single-agent molecularly targeted therapies often fail due to resistance mechanisms.
- Combinations of targeted agents can overcome these resistance pathways.
- Epidermal Growth Factor Receptor (EGFR) and Mammalian Target of Rapamycin (mTOR) are key signaling molecules in cancer.
Purpose of the Study:
- To evaluate the potential of combining EGFR and mTOR inhibitors for cancer treatment.
- To explore the synergistic effects of dual-targeted therapy.
- To identify cancer types that could benefit from this combination strategy.
Main Methods:
- In vitro and in vivo experimental models were used.
- Studies focused on the EGFR/PI3K/Akt/mTOR signaling cascade.
- Combination therapy efficacy was assessed.
Main Results:
- Evidence suggests that combining EGFR and mTOR inhibitors can yield synergistic effects.
- This combination may enhance the efficacy of individual agents.
- The approach is particularly relevant for malignancies with deregulated EGFR/PI3K/Akt/mTOR signaling.
Conclusions:
- Combination therapy targeting both EGFR and mTOR is supported by preclinical data.
- This strategy holds potential for treating specific cancers.
- Further clinical investigation is required to establish the therapeutic value.
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