A Breast Cancer Drug That Gets In The Brain? Cascadian Sees A Way Forward

Excerpt:

“Breast cancer patients sometimes end up dying when their tumors spread all the way to the brain. Some very good drugs already exist for patients with breast cancer, especially ones with tumors that overexpress the HER2 marker, but that success has raised a new question: Can drugmakers take another step, and fight those deadly brain metastases that get people in the end?

“Seattle-based Cascadian Therapeutics is testing that idea this week with researchers gathered at the San Antonio Breast Cancer Symposium. Cascadian is reporting today that patients who got conventional capecitabine and trastuzumab, plus an experimental small-molecule drug, tucatinib (aka ONT-380), lived a median of 7.8 months without their tumors getting worse. About 61% of patients on that triple-drug combo saw tumors shrink. It’s an impressive result, given that these patients were especially ill when they enrolled in the study, having already received a median of three prior rounds of HER2-targeted therapy. The data are also holding up over time: a snapshot of the data from June showed patients living a median of 6.3 months without their tumors spreading.”

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Novel HER2-Targeting Antibody-Drug Conjugate Shows Broad Antitumor Activity

Excerpt:

“A novel HER2-targeting antibody-drug conjugate showed promising antitumor activity across multiple tumor types, including HER2-postive breast cancer, according to phase I data presented at the 2016 ESMO Congress.

” ‘Antibody-drug conjugates represent promising drugs with a wider therapeutic window by effecting efficient and specific drug delivery to oncogene expressing tumor cells,’ explained lead author Kenji Tamura, MD, PhD, chairman, Department of Breast and Medical Oncology, National Cancer Center Hospital, Tokyo, Japan.”

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FDA Gives Ribociclib Priority Review for Frontline HR+/HER2- Breast Cancer

Excerpt:

“The FDA has granted priority review designation to a new drug application (NDA) for ribociclib (LEE011) for use in combination with letrozole as a frontline therapy for patients with hormone-receptor (HR)–positive, HER2-negative advanced breast cancer.

“The NDA for the CDK 4/6 inhibitor is primarily based on findings from the phase III MONALEESA-2 trial, in which combining ribociclib with letrozole reduced the risk of progression or death by 44% compared with letrozole alone in the first-line setting for HR+/HER2- advanced breast cancer (HR, 0.556; 95% CI, 0.43-0.72; P = .00000329). Under the priority designation, the NDA will be reviewed within 6 months, compared with the standard 10-month review.”

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Study Findings Provide Latest Data on Neoadjuvant HER2+ Breast Cancer Treatment

Excerpt:

“Results from the KRISTINE and NSABP B-41 trials provided the latest data on the use of pertuzumab (Perjeta), trastuzumab (Herceptin), ado-trastuzumab emtansine (T-DM1; Kadcyla), and lapatinib (Tykerb) for the neoadjuvant treatment of patients with HER2-positive breast cancer.

“In a lecture at the 2016 ASCO Annual Meeting, Stephen K. Chia, MD, an assistant professor in the division of Medical Oncology at the University of British Columbia, highlighted the key findings from these trials and their implications for the treatment of HER2+ breast cancer.”

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Abemaciclib Effective for Ki67 Reduction in Certain Postmenopausal Women with Breast Cancer

Excerpt:

“Neoadjuvant abemaciclib with or without anastrozole led to significantly greater reductions in tissue Ki67 after 2 weeks of treatment than anastrozole alone among postmenopausal women with hormone receptor–positive, HER-2–negative breast cancer, according to interim phase 2 study results presented at the European Society for Medical Oncology Congress.”

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Expert Discusses Latest Data in Neoadjuvant HER2+ Breast Cancer

Excerpt:

“Results from the KRISTINE and NSABP B-41 trials presented at the 2016 ASCO Annual Meeting provided the latest data on the use of pertuzumab (Perjeta), trastuzumab (Herceptin), ado-trastuzumab emtansine (T-DM1; Kadcyla), and lapatinib (Tykerb) for the neoadjuvant treatment of patients with HER2-positive breast cancer.

“In a lecture at the conference, Stephen K. Chia, MD, an assistant professor in the division of Medical Oncology at the University of British Columbia, highlighted the key findings from these trials and their implications for the treatment of HER2+ breast cancer.”

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FDA Accepts Neratinib NDA for HER2-Positive Breast Cancer

Excerpt:

“The FDA has accepted a new drug application (NDA) for neratinib as an extended adjuvant therapy for patients with HER2-positive breast cancer following prior treatment with postoperative trastuzumab (Herceptin), according to a statement from the developer of the TKI, Puma Biotechnology.

“The application included findings from the phase III ExteNET study, in which neratinib demonstrated a 2-year disease-free survival (DFS) rate of 93.9% compared with 91.6% in the placebo arm, according to findings published in Lancet Oncology. The FDA completes a standard review within 12 months from the time of submission, which was completed for neratinib on July 21, 2016.”

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EMA Validation Puts Neratinib One Step Closer to Approval for HER2+ Breast Cancer

Excerpt:

“The developer of neratinib, Puma Biotechnology, has announced the European Medicines Agency (EMA) has validated the marketing authorization application for neratinib as a potential extended adjuvant therapy for patients with HER2-positive early stage breast cancer following 12 months of trastuzumab (Herceptin).

“The validation confirms the completion of the submission process and starts the formal review by the Committee for Medicinal Products for Human Use (CHMP) and the subsequent final approval decision by the European Commission.

“The application was based on findings from the phase III ExteNET study, which were published in the Lancet Oncology. In this study, extended treatment with neratinib demonstrated a 2-year disease-free survival (DFS) rate of 93.9% compared with 91.6% in the placebo arm, representing a 33% improvement versus placebo (HR, 0.67; P = .009).”

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Novel Findings Support Original Categorization of HER2

Excerpt:

“The original classifications of human epidermal growth factor receptor 2 (HER2) categorization by fluorescent in situ hybridization (FISH) have been supported by recent data, according to a report published online Aug. 29 in the Journal of Clinical Oncology.

“Michael F. Press, M.D., from the University of Southern California Norris Comprehensive Cancer Center in Los Angeles, and colleagues reevaluated the HER2 FISH status of patients from Breast Cancer International Research Group (BCIRG)-005/006/007 clinical trials according to current American Society of Clinical Oncology and the College of American Pathologists (ASCO-CAP) guidelines, which designate five groups based on HER2 FISH ratio and average HER2 gene copy number per tumor cell. Data were included for 10,468 patients.”

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