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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Novel Agents Emerging in Pipeline for HER2+ Breast Cancer

Excerpt:

“There have been significant advances for the treatment of HER2-positive breast cancer over the last decade, says Denise A. Yardley, MD.

“ ‘When we look at the HER2-positive patient, at this point, we have really come a long way with the initial approval of trastuzumab (Herceptin), followed by the addition of pertuzumab (Perjeta), based on the CLEOPATRA data,’ explains Yardley, senior investigator, Breast Cancer Research Program, principal investigator, Sarah Cannon Research Institute. ‘The EMILIA trial has now added T-DM1 (ado-trastuzumab emtansine; Kadcyla), a novel antibody-drug conjugate targeted against HER2.’

“While these FDA approvals have made a large impact for patients with HER2-positive breast cancer, there is still more work to be done. ‘We are really trying to extend the number of novel agents to add to the HER2-population arena,’ Yardley notes.”

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Puma Biotechnology Submits Marketing Authorization Application for PB272 (Neratinib) as Extended Adjuvant Treatment of HER2-Positive Early Stage Breast Cancer in Europe

Excerpt:

“Puma Biotechnology, Inc. (NYSE: PBYI), a biopharmaceutical company, announced that it has submitted its Marketing Authorization Application (MAA) to the European Medicines Agency (EMA) for neratinib. The potential indication is for the extended adjuvant treatment of HER2-positive early stage breast cancer that has previously been treated with trastuzumab (Herceptin®)-based adjuvant therapy. The submission is based upon the ExteNET Phase III study, which reached its primary endpoint whereby neratinib demonstrated a statistically significant reduction of risk of invasive disease recurrence or death versus placebo.”

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Neoadjuvant HER2+ Breast Cancer Options Need Refinement, Expert Says

Excerpt:

“While recent findings from the I-SPY 2 trial have shown potential with the combination of ado-trastuzumab emtansine (T-DM1; Kadcyla) and pertuzumab (Perjeta) for patients with HER2-positive breast cancer, the neoadjuvant space still has a lot of work ahead, according to Lisa A. Carey, MD.

“Results presented at the 2016 AACR Annual Meeting1 showed that, out of the 249 patients enrolled on the I-SPY 2 study, 54% of those who received T-DM1/pertuzumab experienced a pathological complete response (pCR) rate compared with 22% of those who received the combination of paclitaxel (Abraxane) plus trastuzumab (Herceptin).

“This suggests that T-DM1 could increase overall survival (OS) in this patient population, but Carey adds more research with the regimen needs to be conducted.”

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Neratinib Plus Paclitaxel vs. Trastuzumab Plus Paclitaxel in Breast Cancer

Excerpt:

“While neratinib plus paclitaxel was not superior to trastuzumab plus paclitaxel as first-line treatment for ERBB2-positive metastatic breast cancer in terms of progression-free survival, the combination was associated with delayed onset and reduced frequency of central nervous system metastases, a finding that requires a larger study to confirm, according to an article published online by JAMA Oncology.

“Metastatic ERBB2-positive breast cancer has a characteristic spread with most patients developing liver metastases and about half having poor prognosis with central nervous system involvement.

“Ahmad Awada, M.D., of the Jules Bordet Institute, Brussels, and coauthors conducted a randomized clinical trial to examine progression-free survival in women with recurrent or metastatic ERBB2-positive breast cancer. They also examined secondary outcomes that included time to symptomatic or progressive central nervous system lesions and safety.”

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