On October 29, 2024 GSK plc (LSE/NYSE: GSK) and Chimagen Biosciences (Chimagen), a privately held biotechnology company, reported an agreement for GSK to acquire CMG1A46, a clinical-stage dual CD19 and CD20-targeted T cell-engager (TCE), from Chimagen for $300 million upfront (Press release, GlaxoSmithKline, OCT 29, 2024, View Source [SID1234647480]). GSK plans to develop and commercialise CMG1A46 with a focus on B cell-driven autoimmune diseases, such as systemic lupus erythematosus (SLE) and lupus nephritis (LN), with potential to expand into related autoimmune diseases.
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!
For over a decade, GSK has been a pioneer in the treatment of lupus. This agreement underscores the importance of novel therapeutic approaches to address the heterogeneity of lupus manifestations and the continued burden, particularly in patients who suffer from severe disease and are refractory to current standard of care.1
Tony Wood, Chief Scientific Officer, GSK, said: "Through our work in systemic lupus erythematosus and lupus nephritis, we increasingly understand the underlying drivers of B cell-driven diseases. As a novel therapeutic option directed at deep B cell depletion, CMG1A46 offers exciting potential which we are pleased to take forward to address unmet need in lupus and related autoimmune conditions."
CD20 is an established target in the treatment of autoimmune diseases and there is growing clinical evidence that CD19 shows promise as a differentiated therapeutic approach given its presence on more B cell types.2 In preclinical studies, CMG1A46, designed to target both CD19 and CD20, has shown rapid, deep B cell depletion both in the bloodstream and in tissues which could lead to more durable responses in patients.
Zhenhao Zhou, Chief Executive Officer, Chimagen, said: "We are excited by the potential of CMG1A46 to improve the lives of patients suffering from autoimmune conditions and grateful to have GSK accelerate that vision. This agreement provides further validation of our proprietary T cell-engager platform, and we are eager to continue our mission of developing novel multi-specific antibody therapeutics."
CMG1A46 is currently in phase I clinical trials in leukaemia and lymphoma in both the US and China. GSK aims to begin a phase I trial in lupus in 2025.
Terms of the agreement
Under the terms of this agreement, GSK will pay $300 million upfront to acquire full global rights to CMG1A46. In addition, Chimagen will be eligible to receive success-based development and commercial milestone payments for CMG1A46 totalling $550 million.
This agreement is subject to customary conditions, including applicable regulatory agency clearances under the Hart-Scott-Rodino Act in the US.
About CMG1A46
CMG1A46, a dual CD19 and CD20-targeted T cell-engager (TCE), is an IgG-like molecule with high affinity for CD19 and CD20 positive B cells and low affinity for CD3, which could lower toxicities typically associated with TCEs.