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Puma Biotechnology’s Licensing Partner Knight Therapeutics Receives Regulatory Approval from Health Canada to Commercialize NERLYNX (neratinib) for Extended Adjuvant Treatment of Hormone Receptor Positive, HER2-Positive Early Stage Breast Cancer

Nachrichtenquelle: Business Wire (engl.)
16.07.2019, 22:34  |  413   |   |   

Puma Biotechnology, Inc. (Nasdaq: PBYI) announced that its licensing partner Knight Therapeutics Inc. (Knight) has received marketing authorization from Health Canada to commercialize NERLYNX (neratinib) in Canada for the extended adjuvant treatment of women with early stage hormone receptor positive, HER2-overexpressed/amplified breast cancer within one year after completion of trastuzumab-based adjuvant therapy.

Health Canada approval was based on the Phase III ExteNET trial, a multicenter, randomized, double-blind, placebo-controlled trial of neratinib following adjuvant trastuzumab treatment. Women (n=2,840) with early stage HER2-positive breast cancer and within two years of completing adjuvant trastuzumab therapy were randomized to receive either neratinib (n=1420) or placebo (n=1420) for one year.

The results of the ExteNET trial demonstrated that after two years of follow-up, for patients with hormone receptor positive, HER2-positive early stage breast cancer patients who were treated within one year after the completion of trastuzumab based adjuvant therapy, invasive disease-free survival (iDFS) was 95.3% in the patients treated with neratinib compared with 90.8% in those receiving placebo (hazard ratio = 0.49; 95% CI: (0.30, 0.78); p=0.002).

The most common adverse reactions (>5%) were diarrhea, nausea, abdominal pain, fatigue, vomiting, rash, stomatitis, decreased appetite, muscle spasms, dyspepsia, AST or ALT increase, nail disorder, dry skin, abdominal distention, weight loss, and urinary tract infection. The most common adverse reaction leading to discontinuation was diarrhea, which was observed in 16.8% of neratinib-treated patients. Hepatotoxicity or increases in liver transaminases led to drug discontinuation in 1.7% of neratinib-treated patients.

“Health Canada approval marks the first time Canadian women are being presented with an opportunity for extended-adjuvant therapy that will reduce the risk of disease recurrence in patients who would otherwise have had a relapse,” said Jonathan Ross Goodman, Chief Executive Officer of Knight.

Puma Biotechnology’s CEO and President Alan H. Auerbach, added, “Reducing the risk of disease recurrence remains a need for patients, despite advances in the treatment of early stage HER2-positive breast cancer. We are pleased that our partner, Knight Therapeutics, will be bringing NERLYNX to patients throughout Canada. Health Canada represents the second international approval of NERLYNX this year and we are committed to supporting our partners to expand NERLYNX commercial accessibility to patients around the world.”

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