Greenwich LifeSciences Announces Positive Immune Response Data from FLAMINGO-01 Phase III Clinical Trial

Core Viewpoint - Greenwich LifeSciences, Inc. is advancing its Phase III clinical trial FLAMINGO-01 for GLSI-100, an immunotherapy aimed at preventing breast cancer recurrences, with promising preliminary immune response data indicating effectiveness in both HLA-A02 and non-HLA-A02 patient groups [1][4][6]. Group 1: Clinical Trial Updates - The preliminary immune response data from FLAMINGO-01 shows increasing immune responses over time in both HLA-A02 treated and placebo arms, as well as in the non-HLA-A02 arm [2][6]. - The company is considering adding a randomized placebo arm for non-HLA-A02 patients, which could effectively transform the current open label arm into a pivotal Phase III trial [4]. - The trial aims to detect a hazard ratio of 0.3 in invasive breast cancer-free survival, requiring 28 events for analysis, with an interim analysis planned once 14 events have occurred [8]. Group 2: Market Potential and Patient Eligibility - The potential market for GP2 treatment could reach up to $10 billion annually, with the possibility of doubling the number of eligible patients to approximately 88,000 new patients per year in the US and Europe [4][6]. - The company has filed patent claims for non-HLA-A02 patients, which may be solely owned by the company, enhancing its market position [6]. Group 3: Previous Clinical Data - In a Phase IIb clinical trial, GLSI-100 demonstrated an 80% or greater reduction in cancer recurrences over five years in HER2/neu 3+ patients, compared to a 20-50% reduction by other approved products [5][11]. - The immune response peaked at six months after the initial vaccinations, indicating a sustained immune response that correlates with reduced metastatic breast cancer recurrences [12]. Group 4: Company Overview - Greenwich LifeSciences is focused on developing GP2, an immunotherapy targeting breast cancer recurrences, particularly in patients who have undergone surgery [13]. - The company is currently conducting the FLAMINGO-01 trial, which is designed to evaluate the safety and efficacy of GLSI-100 in HER2 positive breast cancer patients [8].