ASH 2025 | Ascentage Pharma Presents Four-Year Follow-Up Data from Registrational Phase II Study of Olverembatinib, Reaffirming Differentiated Long-Term Efficacy and Safety in TKI-Resistant/Intolerant CML-CP

Core Viewpoint - Ascentage Pharma presented four-year follow-up data for Olverembatinib, demonstrating its long-term efficacy and safety in treating TKI-resistant/intolerant chronic-phase chronic myeloid leukemia (CML-CP) at the 67th ASH Annual Meeting [1][2][3] Group 1: Efficacy Results - Olverembatinib showed a median event-free survival (EFS) of 21.2 months compared to 2.9 months for the best available therapy (BAT) in patients with TKI-resistant/intolerant CML-CP [3][12] - For patients without the T315I mutation, Olverembatinib achieved an EFS of 11.9 months versus 3.1 months for BAT [3][12] - The complete hematologic response (CHR) rates were 85% for Olverembatinib compared to 35% for BAT, while complete cytogenetic response (CCyR) rates were 38% versus 19% [12] Group 2: Safety Profile - The safety profile of Olverembatinib was favorable, with a vascular occlusion incidence of 7% among patients [3][11] - No new safety signals were reported, and the study included patients with and without the T315I mutation [11] Group 3: Regulatory and Commercialization Status - Olverembatinib is the first third-generation BCR-ABL1 inhibitor approved in China for specific CML indications, and it is included in the China National Reimbursement Drug List (NRDL) [4][15] - Ascentage Pharma is conducting three global registrational Phase III studies for Olverembatinib in various indications, including newly diagnosed Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL) and gastrointestinal stromal tumors (GIST) [4][15] Group 4: Clinical Significance - The data presented at ASH 2025 reinforces Olverembatinib's role in clinical practice for long-term treatment of CML-CP, providing confidence to physicians and patients [5][11] - The study's findings highlight the need for effective treatment options for patients resistant to or intolerant of first- and second-generation TKIs [8][12]