Latest Results from the I-SPY 2 Trial at the EORTC-NCI-AACR Symposium Demonstrate Ability of MammaPrint® and BluePrint® to Predict Treatment Response in Breast Cancer Patients

IRVINE, Calif. and AMSTERDAM, Nov. 14, 2018 /PRNewswire/ -- Agendia, Inc., a world leader in precision oncology, announced new data from the I-SPY 2 study, presented at the European Organization for Research and Treatment of Cancer (EORTC), the National Cancer Institute (NCI) and the American Association for Cancer Research (AACR) Symposium. The two presentations demonstrate both the prognostic, and the predictive role of the MammaPrint® 70-Gene Breast Cancer Risk of Recurrence and BluePrint® 80-Gene Molecular Subtyping tests in determining which patients are likely to respond to therapies. Dr. Laura van't Veer, chief research officer and co-founder at Agendia, and Professor of Laboratory Medicine at the University California San Francisco, will present the results at the 30^th EORTC-NCI-AACR Symposium at 15:00 GMT on Wednesday, Nov. 14, 2018.

MammaPrint High1/High2 risk class as a pre-specified biomarker of response to nine different targeted agents plus standard neoadjuvant therapy for ~1000 breast cancer patients in the I-SPY 2 TRIAL (Abstract 2)¹

A new analysis from the I-SPY 2 trial showed that a subgroup of "Ultra-High Risk" patients identified by MammaPrint respond better to certain targeted therapies and treatment combinations. Patients were classified as either MammaPrint High Risk (MP1), indicating less aggressive disease, or MammaPrint Ultra-High Risk (MP2), indicating more aggressive disease. Nearly 50 percent of patients were classified as MP2 and had higher rates of pathological complete response (pCR) compared to MP1 patients.

In addition, MP2 patients had a higher chance of achieving pCR if they received veliparib/carboplatin, neratinib, ganitumab, TDM1/pertuzumab or pembrolizumab in addition to the standard paclitaxel treatment alone or in combination with trastuzumab. Together, these findings support the use of the MammaPrint High Risk or Ultra-High Risk result as a predictive biomarker of treatment response.

BluePrint basal subtype predicts neoadjuvant therapy response in ~400 HR+HER2- patients across 8 arms in the I-SPY 2 TRIAL (Abstract 3)²

A second analysis of the I-SPY 2 trial evaluated neoadjuvant chemotherapy response in different subgroups of patients with HR+/HER2- disease. Using the BluePrint Molecular Subtyping test, patients were classified as having either basal, luminal or HER2 subtypes. Patients with the basal subtype were four times more likely to achieve pCR with neoadjuvant therapy than patients with the luminal subtype, and this association was independent of the type of treatment they received. Additionally, more than three-quarters of patients with the HR+/HER2- basal subtype of cancer were classified as having MP2 Ultra-High Risk disease, suggesting that genetic and molecular risk signatures can be used to predict treatment response in similar subgroups of patients.

Dr. Laura van 't Veer, Chief Research Officer and Co-founder at Agendia said:

"The results presented at the EORTC-NCI-AACR Symposium demonstrate that MammaPrint is not just a prognostic test, it is also a predictive test. When used in conjunction with BluePrint, it can stratify patients into different subgroups to help identify which are more likely to respond to new treatments or to neoadjuvant chemotherapy and which are not likely to respond and should be given an alternative treatment. We need to further investigate the clinical implications, but this is an important milestone with significant value for women with breast cancer."

Dr. William Audeh, Chief Medical Officer at Agendia said:

"The new studies stemming from the I-SPY 2 trial are very encouraging and highlight the continuing and constantly expanding utility of MammaPrint and BluePrint to identify which patients will respond to specific treatments based on the genomic signatures of their tumors. In discovering the MammaPrint signature with her colleague Dr. Rene Bernards, Dr. van 't Veer harnessed the power of genomics to provide a platform capable of yielding continuous new discoveries to further understand and personalize the treatment of breast cancer. As the landmark I-SPY 2 trial further evolves, we anticipate future findings that will continue to bolster the value of precision oncology."

1. MammaPrint High1/High2 risk class as a pre-specified biomarker of response to nine different targeted agents plus standard neoadjuvant therapy for ~ 1000 breast cancer patients in the I-SPY 2 TRIAL. Poster presented at EORTC-NCI-AACR. November 2018; Dublin, Ireland.
2. BluePrint basal subtype predicts neoadjuvant therapy response in ~400 HR+HER2- patients across 8 arms in the I-SPY 2 TRIAL. Poster presented at EORTC-NCI-AACR. November 2018; Dublin, Ireland.

About MammaPrint®

MammaPrint is an in vitro diagnostic medical device, performed as a testing service in a central laboratory, using the 70-gene expression profile of breast cancer tissue samples to assess a patient's risk for distant metastasis. The device is FDA-cleared and CE-marked, enabling use in the European Union. MammaPrint is indicated for use by physicians as a prognostic marker only, along with other clinical-pathological factors. It is not intended to determine the outcome of disease, nor to suggest or infer an individual patient's response to therapy. MammaPrint is the only test of its kind recommended for lymph node-negative and lymph node-positive patients by both the American Society of Clinical Oncology (ASCO) and National Comprehensive Cancer Network (NCCN). The test is also recommended by many other national and international clinical practice guidelines.

About BluePrint®

BluePrint is an 80-gene complementary test provided with MammaPrint which allows functional molecular subtyping of a breast cancer sample into three distinct subtypes: Luminal-type, HER2-type and Basal-type, each with marked differences in long-term outcome and response to neoadjuvant chemotherapy.

About I-SPY 2

I-SPY 2 is an interventional, randomized neoadjuvant Phase II clinical trial that is evaluating the efficacy of new targeted drug agents in combination with standard chemotherapy compared to standard therapy alone. The goal of the trial is to identify more treatment regimens for different subsets of breast cancer patients based on the molecular characteristics of their tumors and by learning about which early indicators of response are predictors of treatment success. A MammaPrint High Risk result is a prerequisite for patients included in the trial. 

About Agendia

Agendia is a privately held, leading precision oncology company that develops and markets genomic diagnostic products, which help support physicians with their complex treatment decisions. Agendia's breast cancer tests were developed using an unbiased gene selection by analyzing the complete human genome. The company's offerings include the MammaPrint Breast Cancer Risk-of-Recurrence Test, and the BluePrint Molecular Subtyping Test, both on microarray technology, whereas the new MammaPrint BluePrint Breast Cancer Recurrence and Molecular Subtyping Kit, is on NGS technology.

The MammaPrint BluePrint next-generation sequencing-based kit is a CE-marked device currently available for use in cancer centers in select regions of the world.

In addition, Agendia has a pipeline of other genomic products in development. The company collaborates with pharmaceutical companies, leading cancer centers and academic groups to develop companion diagnostic tests in the area of oncology. For more information on Agendia or the MammaPrint and BluePrint tests, visit www.agendia.com. Follow Agendia, Inc. on Facebook, Twitter, or LinkedIn to keep up-to-date with the latest news.

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Heather Platisha
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SOURCE Agendia, Inc.