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Etirinotecan pegol for the treatment of breast cancer
Elena López-Miranda1, Javier Cortés1,2
1a Department of Medical Oncology , Ramon y Cajal University Hospital , Madrid , Spain.
Introduction:
Advanced breast cancer is incurable for most patients with limited therapeutic options. As such, there is a critical need for new and novel agents that lack cross-resistance and mitigate overlapping toxicities.
Areas Covered:
This review examines etirinotecan pegol as a promising new agent for the treatment of refractory metastatic breast cancer. Etirinotecan pegol is the first topoisomerase I inhibitor with a novel design: a long-acting polymer conjugate of irinotecan molecularly engineered to concentrate in vascularized tumors and provide sustained circulation time of SN38 for prolonged tumor cell exposure. Etirinotecan pegol pharmacology is reviewed in this paper along with safety and efficacy data from preclinical and clinical trials. In the phase II advanced breast cancer setting, etirinotecan pegol provided promising activity, which was maintained in poor prognostic subgroups, with low rates of neutropenia and neuropathy - issues plaguing our currently available agents.
Expert Opinion:
Etirinotecan pegol demonstrates anti-tumor activity and improved tolerability in patients with refractory metastatic breast cancer. As a novel topoisomerase I inhibitor in breast cancer, etirinotecan pegol holds great therapeutic potential, allowing the challenge of resistance in the advanced disease setting to be addressed.
Insights
Etirinotecan pegol shows promise for advanced breast cancer treatment. This novel topoisomerase I inhibitor offers anti-tumor activity with improved tolerability, addressing resistance challenges.
Area of Science:
- Oncology
- Pharmacology
- Drug Development
Background:
- Advanced breast cancer remains largely incurable, necessitating novel therapeutic strategies.
- Current treatments face limitations due to cross-resistance and overlapping toxicities.
- There is a significant unmet need for innovative agents in refractory metastatic breast cancer.
Purpose of the Study:
- To review etirinotecan pegol as a potential new agent for refractory metastatic breast cancer.
- To examine the pharmacology, safety, and efficacy of etirinotecan pegol.
- To assess its potential to overcome treatment resistance and toxicity issues.
Main Methods:
- Review of preclinical and clinical trial data for etirinotecan pegol.
- Examination of etirinotecan pegol's novel design as a long-acting polymer conjugate of irinotecan.
- Analysis of its mechanism as a topoisomerase I inhibitor concentrating in tumors.
Main Results:
- Etirinotecan pegol demonstrated promising anti-tumor activity in Phase II trials for advanced breast cancer.
- Activity was maintained in poor prognostic subgroups.
- Low rates of neutropenia and neuropathy were observed, suggesting improved tolerability.
Conclusions:
- Etirinotecan pegol exhibits significant anti-tumor activity and improved tolerability in patients with refractory metastatic breast cancer.
- As a novel topoisomerase I inhibitor, it holds therapeutic potential for advanced disease.
- It offers a new approach to address resistance challenges in breast cancer treatment.
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