Arvinas LLC(ARVN) GlobeNewswire·2025-05-31 12:00Core Insights - The Phase 3 VERITAC-2 clinical trial results indicate that vepdegestrant monotherapy shows a statistically significant improvement in progression-free survival (PFS) for patients with ESR1 mutations compared to fulvestrant [2][4][6] - Vepdegestrant is positioned as a potential best-in-class treatment option for patients with ER+/HER2- advanced or metastatic breast cancer, particularly in the second-line setting [4][7][12] Group 1: Clinical Trial Results - Vepdegestrant reduced the risk of disease progression or death by 43% in patients with ESR1 mutations, with a median PFS of 5.0 months compared to 2.1 months for fulvestrant [2][3] - In the intent-to-treat population, the median PFS was 3.7 months for vepdegestrant versus 3.6 months for fulvestrant, which did not reach statistical significance [2][4] - The clinical benefit rate (CBR) for vepdegestrant was 42.1% compared to 20.2% for fulvestrant, and the objective response rate (ORR) was 18.6% versus 4.0% respectively [4][6] Group 2: Safety and Tolerability - Vepdegestrant was generally well tolerated, with low rates of gastrointestinal adverse events such as nausea (13.5%), vomiting (6.4%), and diarrhea (6.4%) [3][5] - The incidence of grade 4 treatment-emergent adverse events (TEAEs) was 1.6% in the vepdegestrant arm compared to 2.9% in the fulvestrant arm [3][5] - TEAEs leading to treatment discontinuation occurred in 2.9% of patients taking vepdegestrant versus 0.7% for fulvestrant [3][5] Group 3: Market and Development Potential - Approximately 2.3 million new breast cancer diagnoses were reported globally in 2022, with ER+/HER2- breast cancer accounting for about 70% of cases [6][12] - The companies plan to submit a New Drug Application (NDA) for vepdegestrant to the FDA in the second half of 2025 [7][12] - Vepdegestrant is the first PROTAC evaluated in a Phase 3 clinical trial, indicating a novel approach in treating breast cancer [5][7]