Callio Therapeutics to Present Poster on CLIO-8221, a Novel Dual-Payload Antibody-Drug Conjugate, at AACR 2026SEATTLE and SINGAPORE, April 15, 2026 (GLOBE NEWSWIRE) -- Callio Therapeutics, a biotherapeutics company advancing dual-payload antibody-drug conjugates (ADCs) with a targeted, multi-mechanism approach to cancer treatment, today announced a poster presentation on CLIO-8221 at the American Association of Cancer Research (AACR) Annual Meeting 2026 (April 17-22, San Diego). CLIO-8221, currently being evaluated in an ongoing Phase 1 trial, is a first-in-class dual-payload ADC, engineered for targeted delivery of two payload classes, a topoisomerase 1 (Topo1) inhibitor and an ATR inhibitor, to HER2-expressing tumors.
Callio Therapeutics Doses First Patient in Phase I Clinical Trial of Dual-Payload ADC CLIO-8221 in Advanced HER2-Expressing Solid TumorsCallio Therapeutics is actively developing a pipeline of promising dual-payload ADCs featuring rationally designed payload combinations for hard-to-treat tumors
