Dual HER2-Blockade Plus AI Shows Promise in HER2+/ER+ Breast Cancer

Excerpt:

“Data from the phase II PERTAIN trial presented late last year at the 2016 San Antonio Breast Cancer Symposium (SABCS) showed that adding an aromatase inhibitor (AI) to pertuzumab (Perjeta) and trastuzumab (Herceptin) extended progression-free survival (PFS) by over 3 months versus trastuzumab plus an AI in patients with HER2-positive, HR-positive locally advanced or metastatic breast cancer.

“The median PFS was 18.89 months with the pertuzumab triplet compared with 15.80 months for trastuzumab and an AI alone (HR, 0.65; 95% CI, 0.48-0.89; P = .007). The objective response rates were 63.3% versus 55.7%, respectively.”

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Three-Drug Breast Cancer Regimen Slows Progression

Excerpt:

“Adding a drug to a standard regimen for hormone receptor (HR)-positive and HER2-positive breast cancer improved progression-free survival, a researcher said here.

“In a Phase II randomized trial, investigators compared an aromatase inhibitor (AI) combined with pertuzumab (Perjeta) and trastuzumab (Herceptin) versus an AI just with trastuzumab in women with locally advanced or metastatic breast cancer, Grazia Arpino, MD, PhD, of the University of Naples Federico II in Italy, reported at a general session at the San Antonio Breast Cancer Symposium.

“The three-drug combination led to a median of 18.89 months without progression, compared with 15.8 months for the two drugs.”

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Hormonal Therapy Effectively Added to Dual HER2-Blockade in Phase II PERTAIN Study

Excerpt:

“The addition of an aromatase inhibitor (AI) to pertuzumab (Perjeta) and trastuzumab (Herceptin) improved progression-free survival (PFS) by 3.09 months, when compared with trastuzumab plus an AI, according to findings from the phase II PERTAIN trial presented at the 2016 San Antonio Breast Cancer Symposium.

“In the ongoing, open-label study, the median PFS was 18.89 months with the pertuzumab combination compared with 15.80 months for trastuzumab and an AI alone. Furthermore, there was a 35% reduction in the risk of progression or death with the addition of pertuzumab (HR, 0.65; 95% CI, 0.48-0.89; P = .007).”

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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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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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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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NDA for Neratinib in HER2-Positive Breast Cancer Accepted by FDA

Excerpt:

“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) has been accepted by the FDA, 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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Lead Investigator Emphasizes Impact of Equivalent Efficacy With Trastuzumab Biosimilar in HER2+ Breast Cancer

Excerpt:

“With drug prices continuing to rise, access to certain cancer treatments is becoming more challenging for patients facing financial limitations.

“Biosimilars could make it easier for some patients to afford their medications, especially those outside of the United States where these types of agents are more common, says Hope S. Rugo, MD.

“Rugo is the lead investigator on the Heritage study, which is evaluating MYL-1401O, a proposed biosimilar for trastuzumab (Herceptin), in patients with HER2-positive metastatic breast cancer.”

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Updated Testing Guidelines Make More Women Eligible for Herceptin, yet Benefit Uncertain

Excerpt:

“Changes to HER2 testing guidelines for breast cancer in 2013 significantly increased the number of patients who test HER2-positive, according to a new study by Mayo Clinic researchers published in the Journal of Clinical Oncology. Cancers that have an excess of HER2 protein or extra copies of the HER2 gene are called HER2-positive and can be treated with drugs like Herceptin that target HER2. HER2 stands for human epidermal growth factor receptor 2.

“Mayo Clinic researchers found that the number of HER2-positive breast cancers doubled after testing guidelines were changed by the American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) in 2013. ‘The new guidelines were established to reduce the number of equivocal cases, where HER2 status is uncertain, but we found that they did just the opposite,’ says senior study author Robert Jenkins, M.D., Ph.D., the Ting Tsung and Wei Fong Chao Professor of Individualized Medicine Research and Professor of Laboratory Medicine and Pathology at Mayo Clinic. ‘The number of equivocal cases went up, resulting in additional testing and a much larger number of women with cancers ultimately labeled as HER2-positive.’ ”

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