Anti-HER agents in gastric cancer: from bench to bedside
Lorenzo Fornaro1, Maurizio Lucchesi, Chiara Caparello
1UO Oncologia Medica 2 Universitaria, Azienda Ospedaliero-Universitaria Pisana, Istituto Toscano-Tumori, Via Roma 67, 56126 Pisa, Italy. lorenzo.fornaro@ gmail.com
Abstract:
Despite some advances in the past few years, the search for effective treatment modalities for advanced gastric and gastro-esophageal junction cancer is far from over. Available data clearly demonstrate that the development of new drugs will have little, if any, chance of success if it is not guided by in-depth knowledge of disease biology. However, using biologic agents to target key molecular pathways, such as those regulated by human epidermal growth factor receptor (HER) family members, may be effective. Indeed, the positive results achieved by the anti-HER2 agent trastuzumab in a phase III trial in HER2-positive patients support this approach. Many new anti-HER molecules are now under evaluation for the treatment of gastric and gastro-esophageal junction cancer, but so far attempts to identify reliable predictive factors from phase I and II trials have produced inconclusive results. In addition, large phase III trials are still being conducted in molecularly unselected populations. Refining patient selection is essential to maximize the benefit of targeted agents, to avoid significant toxicities and for the development of alternative therapeutic approaches in patients who have nonresponsive disease.
Insights
Targeting human epidermal growth factor receptor (HER) pathways shows promise for advanced gastric cancer. Refining patient selection is crucial for effective targeted therapies and developing treatments for nonresponsive disease.
Area of Science:
- Oncology
- Molecular Biology
- Gastroenterology
Background:
- Advanced gastric and gastro-esophageal junction cancer treatment remains challenging despite recent progress.
- Effective drug development necessitates a deep understanding of cancer biology.
- Targeting molecular pathways, like those involving human epidermal growth factor receptor (HER) family members, offers a promising therapeutic strategy.
Purpose of the Study:
- To evaluate the efficacy of targeted therapies in advanced gastric and gastro-esophageal junction cancer.
- To highlight the importance of molecular pathway knowledge in guiding drug development.
- To emphasize the need for refined patient selection in targeted therapy trials.
Main Methods:
- Review of existing data on targeted agents, particularly anti-HER2 therapies like trastuzumab.
- Analysis of outcomes from phase I, II, and III trials for novel anti-HER molecules.
- Assessment of the challenges in identifying predictive factors for targeted treatments.
Main Results:
- The anti-HER2 agent trastuzumab demonstrated positive results in HER2-positive gastric cancer patients.
- Current evaluations of new anti-HER molecules are ongoing.
- Attempts to identify reliable predictive factors from early-phase trials have yielded inconclusive results.
Conclusions:
- Targeted therapies, especially those inhibiting HER family members, hold potential for treating advanced gastric and gastro-esophageal junction cancers.
- Refining patient selection is essential to maximize the benefits of targeted agents and minimize toxicity.
- Further research is needed to identify predictive biomarkers and develop alternative strategies for nonresponsive disease.
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