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CStone Presents the Latest Preclinical Findings of CS2009 (PD-1/VEGF/CTLA-4 trispecific antibody) at 2025 AACR
CStone Pharmaceuticals ("CStone", HKEX: 2616), an innovation-driven biopharmaceutical company focused on anti-cancer therapies, announced today that a poster presentation of preclinical data of CS2009 (PD-1/VEGF/CTLA-4 trispecific antibody), a key asset in CStone Pipeline 2.0, has been delivered at the 2025 American Association for Cancer Research (AACR) Annual Meeting. CS2009 global phase I trial is ongoing in Australia with first patient dosed in this March and will soon be expanded to China a
About this update from Cstone Pharmaceuticals
[{"type":"text","content":"SUZHOU, China, May 5, 2025 /PRNewswire/ -- CStone Pharmaceuticals ("CStone", HKEX: 2616), an innovation-driven biopharmaceutical company focused on anti-cancer therapies, announced today that a poster presentation of preclinical data of CS2009 (PD-1/VEGF/CTLA-4 trispecific antibody), a key asset in CStone Pipeline 2.0, has been delivered at the 2025 American Association for Cancer Research (AACR) Annual Meeting. CS2009 global phase I trial is ongoing in Australia with first patient dosed in this March and will soon be expanded to China and the US.","length":563,"tagName":"p"},{"type":"text","content":"PD-1, VEGFA, and CTLA-4 are clinically validated targets for immunotherapies, which can exert complementary, multi-dimensional anti-tumor effects through synergistic mechanisms. Blockade of PD-1 and CTLA-4 has demonstrated synergistic effects, extending overall survival benefits as well as progress-free survival benefits in many tumor types including NSCLC, which could be further strengthened by the blockade of VEGFA signaling. By integrating these three mechanisms of actions in one molecule, CS2009 holds great potential to deliver superior clinical benefits over PD-(L)1 antibodies or PD-(L)1/VEGF and PD-(L)1/CTLA4 bispecific antibodies.","length":651,"tagName":"p"},{"type":"text","content":"CS2009 is a promising trispecific antibody targeting PD-1, VEGFA, and CTLA-4, which demonstrates broad clinical application prospects for solid tumors with the great potential to become the next-generation immune-oncology backbone to replace current anti-PD-(L)1-based therapies.","length":279,"tagName":"p"},{"type":"text","content":"Key Highlights:","length":15,"tagName":"p"},{"type":"list","items":[{"val":[{"type":"text","content":"CS2009 exhibited enhanced affinity upon simultaneous PD-1/CTLA-4 engagement. CS2009 enhances anti-tumor efficacy by preferentially targeting PD-1/CTLA-4 double positive T cells in TME.","length":189,"tagName":"p"}]},{"val":[{"type":"text","content":"CS2009 exhibited an approximately 150-fold enhancement in checkpoint inhibitory activity on PD-1/CTLA-4 dual-reporter assay through crosslinking with VEGFA dimers. In PD-1 reporter assay, the CS2009/VEGFA combination demonstrated approximately 300-fold greater immune checkpoint activity compared to CS2009 alone. Mixed lymphocyte reaction (MLR) a...