On December 9, 2020 Ascentage Pharma (6855.HK), a globally focused, clinical-stage biotechnology company engaged in developing novel therapies for cancers, chronic hepatitis B (CHB), and age-related diseases, reported updates on the clinical development of the company’s novel Bcl-2 inhibitor APG-2575, further demonstrating the drug candidate’s therapeutic potential (Press release, Ascentage Pharma, DEC 9, 2020, View Source [SID1234572550]).

Schedule your 30 min Free 1stOncology Demo!
Discover why more than 1,500 members use 1stOncology™ to excel in:

Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing

                  Schedule Your 30 min Free Demo!

APG-2575 is a novel, orally administered small-molecule Bcl-2‒selective inhibitor being developed by Ascentage Pharma. APG-2575 is designed to treat hematologic malignancies and solid tumors by selectively blocking antiapoptotic protein Bcl-2 to restore the normal apoptosis process in cancer cells. As a bona fide Bcl-2 inhibitor, APG-2575 demonstrated desired target engagement. APG-2575 selectively binds to Bcl-2, disrupts Bcl-2:BIM complexes, and releases the proapoptotic protein BIM. Freed BIM subsequently activates BAX/BAK for pore formation on the mitochondria membrane, leading to mitochondrial outer-membrane permeabilization (MOMP), cytochrome c release, caspase activation, and apoptosis of cancer cells. APG-2575 is the first China-developed Bcl-2 inhibitor having entered clinical development in China. As a single agent, APG-2575 has potent antitumor activity in Bcl-2-dependent tumor cells, and has shown a broad range of antitumor activities when combined with other oncologic drugs. Previously, APG-2575 had received clearances and approvals for multiple Phase Ib/II clinical studies in China, Australia, and the US, and is currently being developed in a range of hematologic malignancies globally.

Highlights of the update

In total, 9 clinical studies are ongoing globally, with over 100 patients who have been administered APG-2575 at doses ranging from 20 mg to 1200 mg for the treatment of chronic lymphocytic leukemia (CLL), follicular lymphoma (FL), mantle cell lymphoma (MCL), diffuse large B-cell lymphoma (DLBCL), multiple myeloma (MM), acute myeloid leukemia (AML), and high leukocyte acute leukemia (HCL), etc.
Studies of APG-2575 in the treatment of relapsed/refractory CLL (r/r CLL) have enrolled over 30 patients. Preliminary results show that an objective response rate (ORR) of 70% has been reached in evaluable patients.
On safety:
Maximum tolerated dose (MTD) has not been reached, and no dose-limiting toxicity (DLT) was observed.
No clinical or laboratory tumor lysis syndrome (TLS) was observed.
Most treatment-related adverse events (TRAEs) were of Grade 1 or 2.
Limited cases of neutropenia and thrombocytopenia.
APG-2575 has been granted three Orphan Drug Designations (ODDs) by the US FDA, for the treatment of CLL, MM, and Waldenström macroglobulinemia (WM).
"APG-2575 is a key drug candidate of Ascentage Pharma’s apoptosis-targeted pipeline," said Dr. Yifan Zhai, Chief Medical Officer of Ascentage Pharma. "As the first China-developed Bcl-2 inhibitor having entered clinical development in China, APG-2575 as a single agent or in combinations has demonstrated great therapeutic potential and clinical advantages. We are accelerating the global clinical development of this drug candidate, which we hope will soon translate into a new therapeutic option for patients in China and around the world."