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Results from BEATRICE and I–SPY2 Trials in TNBC and HR+/HER2- Breast Cancer

A personalized tumor-informed blood test “provides independent prognostic value beyond the known risk factors of lymph node involvement, tumor size and presence of tumor infiltrating lymphocytes,” according to data from two trials, BEATRICE and I-SPY2, presented at the 2022 American Association for Cancer Research meeting in April. 

Signatera is a circulating tumor DNA (ctDNA) test that can be used for treatment monitoring and molecular residual disease assessment.  

The test received three breakthrough therapy designations from the FDA across multiple cancer types. 

In BEATRICE, a phase 3 clinical trial that analyzed 186 samples from patients with triple-negative breast cancer, results showed that ctDNA collected post-surgery offered an added prognostic value. 19.9% of patients with early-stage TNBC had detectable ctDNA after surgery. The median time between the first ctDNA positivity and a radiographic occurrence was 6.1 months. 

Researchers in the I-SPY2 trial, explored a total of 734 blood samples from 106 HR+/HER2- patients and 97 TNBC patients during their neoadjuvant chemotherapy.  

In patients with TNBC, early clearance of ctDNA after 3 weeks of treatment was proven to be a significant predictor of pathologic complete response.  

Patients who were ctDNA negative following neoadjuvant chemotherapy in both subgroups had significantly improved distant recurrence-free survival. 

"This data shows the potential utility of personalized ctDNA monitoring with Signatera during neoadjuvant treatment, giving us the ability to, in conjunction with MR imaging, improve the prediction of response early in the course of treatment," said Laura Esserman, MD, MBA, and Laura Van ‘T Veer, PhD, both breast cancer specialists on the I-SPY2 Trial. 

References:
https://www.quantumleaphealth.org/media/natera-to-present-data-from-the-beatrice-and-i-sp[…]nd-hr-her2-breast-cancer-at-the-2022-aacr-annual-meeting

Disclosures: MD /alert could not confirm financial disclosures at the time of reporting. 

 

 

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