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Arrotex, the pharmaceutical commercialization platform of DBG, Australia's leading diversified healthcare group, will be responsible for the registration, market access, and commercialization of sugemalimab in Australia and New Zealand. This partnership marks sugemalimab's fifth international commercialization partnership, further expanding the product's global footprint.
First-line NSCLC – Compelling Activity Across All PD-L1 Subgroups In first-line non-small cell lung cancer (NSCLC) patients with high PD-L1 expression (TPS ≥50%), CS2009 monotherapy achieved an objective response rate (ORR) of 81.3% and a disease control rate (DCR) of 100.0%, with consistent benefit across squamous (ORR: 87.5%) and non‑squamous (ORR: 75.0%) histologies. In the PD-L1-negative/low population (TPS ≤5%) squamous NSCLC cohort, CS2009 in combination with chemotherapy achieved an ORR of 75.0% and a DCR of 100.0%; notably, PD-L1-negative patients within this cohort achieved an ORR of 100.0%; the current efficacy readout remains immature due to the short follow‑up for most patients in this cohort.
SUZHOU, China, April 19, 2026 /PRNewswire/ -- CStone Pharmaceuticals ("CStone," HKEX: 2616), an innovation-driven biopharmaceutical company focused on the research and development of therapies for oncology, immunology, inflammation, and other key disease areas, today announced that the Company presented the latest preclinical data for three proprietary pipeline assets at the American Association for Cancer Research (AACR) Annual Meeting (from April 17 to 22), including CS5007 (EGFR/HER3 ADC), CS5006 (ITGB4 ADC), and CS5008 (DLL3/SSTR2 ADC). CStone's Proprietary ADC Technology Platform All three antibody-drug conjugates (ADCs) presented at AACR – CS5007 (EGFR/HER3 ADC), CS5006 (ITGB4 ADC), and CS5008 (DLL3/SSTR2 ADC) – are developed utilizing CStone's proprietary ADC technology platform, which incorporates the following core features: High Stability & Precise Payload Release: The platform utilizes CStone's proprietary CSL20 linker, a hydrophilic construct designed for enhanced stability in circulation.
Rapid Advancement Across Core R&D Pipeline The global, multicenter Phase I/II clinical trial of CS2009 (PD-1/VEGF/CTLA-4 trispecific antibody) is actively enrolling patients in Australia and China, and the Phase II IND application has been approved in the US. CS2009 demonstrates an excellent safety profile with a ≥Grade 3 TRAE rate of 23% , along with broad-spectrum anti-tumor activity.
Key Highlights: Excellent Safety Profile: As of mid-March 2026, 113 heavily pretreated patients with solid tumors have been enrolled in the Phase I trial of CS2009, with a median follow-up of approximately 6 months. The more mature data continue to show a favorable safety profile, with 23% incidence of Grade ≥3 Treatment-Related Adverse Events (TRAEs).
Following approval by the European Commission (EC), sugemalimab has received a new indication approval from the UK Medicines and Healthcare products Regulatory Agency (MHRA) for stage III non-small cell lung cancer (NSCLC). This marks the second indication approved for the product in the UK.
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