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Pharma Tech Outlook | Thursday, December 24, 2020
Efficacy outcomes show continued efficacy of neratinib in patients with HER2-positive early-stage breast cancer.
FREMONT, CA: Puma Biotechnology, a biopharmaceutical company, announces that efficacy results of neratinib in HER2-positive early-stage breast cancer (eBC) from the Phase III ExteNET trial were presented at the 2020 Virtual San Antonio Breast Cancer Symposium (SABCS) that is presently taking place. The presentation titled, Continued efficacy of neratinib in patients with HER2-positive early-stage breast cancer: Final overall survival analysis from the randomized phase 3 ExteNET trial, is presented at a Spotlight Poster Discussion Session by Frankie Ann Holmes, M.D., FACP, Texas Oncology Houston US Oncology Research, a researcher of the trial.
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ExteNET was a multicenter, double-blind, randomized, Phase III trial of 2,840 HER2-positive eBC patients who got neratinib after neoadjuvant or adjuvant therapy with chemotherapy and trastuzumab. Patients were stratified by status of hormone receptor and assigned to one year of treatment with oral neratinib 240 mg/day or placebo randomly. The endpoint of the trial was invasive disease-free survival (iDFS). Secondary endpoints include survival and cumulative incidence of CNS metastases. A descriptive analysis that assessed CNS disease-free survival, which was defined as the time from randomization to CNS recurrence or death from any cause, was performed.
Within the European Union, neratinib is approved in patients with hormone receptor-positive breast cancer who initiated treatment within a year of completing an adjuvant trastuzumab regimen. The endpoints were analyzed for three groups of clinical interest: the intent to treat (ITT) population; patients with HR+ breast cancer who initiated treatment within one year of completing adjuvant trastuzumab containing regimen; and patients with HR+ breast cancer who initiated treatment within one year of completing adjuvant trastuzumab containing regimen and who did not get a complete pathological response after neoadjuvant treatment and therefore were at a high risk of recurrence. The Phase III ExteNET trial was published in the October 5, 2020 issue of Clinical Breast Cancer.
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