Atossa Therapeutics and Quantum Leap Healthcare Announce New Study Arm to Evaluate (Z)-Endoxifen in the Ongoing I-SPY 2 Clinical Trial

SEATTLE and SAN FRANCISCO, March 21, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology, and Quantum Leap Healthcare Collaborative today announce that Atossa’s proprietary Selective Estrogen Receptor Modulator (SERM), (Z)-endoxifen, will be evaluated in a new study arm of the ongoing I-SPY 2 clinical trial. The I-SPY 2 TRIAL evaluates neoadjuvant treatments for locally advanced breast cancer and is a collaborative effort among academic investigators from major cancer research centers across the United States, Quantum Leap Healthcare Collaborative, the U.S. Food and Drug Administration, and the Foundation for the National Institutes of Health (FNIH) Cancer Biomarkers Consortium. Approximately 20 patients will be treated with (Z)-endoxifen for up to 24 weeks prior to surgery.

The new study arm evaluating (Z)-endoxifen is part of the ongoing I-SPY 2 Endocrine Optimization Pilot Protocol (EOP), which targets patients with newly diagnosed estrogen receptor-positive (ER+) invasive breast cancer whose tumors are predicted to be sensitive to endocrine therapy but for whom chemotherapy is expected to provide little or no benefit. These patients have substantial risk for recurrence, often after five years, and need novel agents that are more tolerable and effective than the current standard of care and address the risk of recurrence.

“Atossa is proud to partner with Quantum Leap Healthcare Collaborative and excited that (Z)-endoxifen has been added to their unprecedented I-SPY clinical trial, which is designed to quickly and efficiently bring new drug therapies to breast cancer patients who need them urgently,” said Dr. Steven Quay, Atossa’s President and Chief Executive Officer. “Data from this trial will supplement data generated through our ongoing Phase 2 EVANGELINE trial, which is investigating (Z)-endoxifen as a neoadjuvant treatment for premenopausal women with ER+ / HER2- breast cancer. There remains a critical need for more effective and tolerable treatment options for this patient population.”