On May 6, 2025 Agendia, Inc., reported that new data from its ongoing FLEX Study will be presented at the upcoming ESMO (Free ESMO Whitepaper) Breast Cancer 2025 congress taking place May 14-17 in both Munich, Germany and virtually (Press release, Agendia, MAY 6, 2025, View Source [SID1234652614]).

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The FLEX Study (NCT03053193) is a prospective real-world evidence, observational breast cancer study designed to correlate whole transcriptome gene expression in early-stage breast cancer with clinical outcomes, and to evaluate how genomic insights can inform treatment decisions in early-stage breast cancer. In this analysis, researchers examined the impact of BluePrint, Agendia’s 80-gene molecular subtyping assay, on pathological complete response (pCR) rates and chemotherapy (CT) decision-making in patients with hormone receptor-positive (HR+), HER2-negative tumors classified as High Risk by MammaPrint. BluePrint further stratified these tumors into Basal or Luminal B subtypes, offering a more nuanced view of tumor biology and potential treatment response.

The poster presentation, titled "The Impact of the 80-gene signature on pCR and chemotherapy treatment decisions in Early-Stage Breast Cancer: A FLEX Analysis [70P]," (A.M. Brufsky, et al.), highlights findings from the analysis of two cohorts from the FLEX Study: one consisting of patients who underwent genomic analysis on pre-operative core needle biopsy, and received neoadjuvant chemotherapy with available pCR data and another cohort with documented physician chemotherapy recommendations. The analysis found that patients with MammaPrint High Risk, HR+ HER2- Basal-type tumors were more likely to achieve a pCR following neoadjuvant chemotherapy compared to those with Luminal B tumors. The analysis also showed that these Basal-type tumors were more frequently recommended for chemotherapy overall, more often treated with neoadjuvant chemotherapy specifically, and received more intensive regimens compared to Luminal B tumors. These results suggest that BluePrint provides actionable molecular insights that physicians are using to inform real-world treatment decisions, even among patients already eligible for chemotherapy based on MammaPrint High Risk status.

"These results reinforce the value of BluePrint in helping physicians personalize treatment plans for early-stage breast cancer," said Adam Brufsky, MD, PhD, Professor and Associate Chief of Hematology and Oncology at UPMC Hillman Cancer Center. "By identifying Basal-type tumors that are more likely to respond to chemotherapy, BluePrint can guide decisions about treatment intensity and timing that align with each patient’s individual tumor biology."

Poster Presentation Details:

Title: The Impact of the 80-gene signature on pCR and chemotherapy treatment decisions in Early-Stage Breast Cancer: A FLEX Analysis [70P]
Date and Time: Thursday, May 15, 12:00 PM CEST
Location: ICM – International Congress Center of the Munich Messe, Hall B0