Advances in antibody-drug conjugates in cancer: latest updates from the 2026 AACR annual meeting

Antibody-drug conjugates (ADCs) are rapidly evolving from conventional cytotoxic delivery systems into multifunctional, immune-integrated therapeutic platforms. Highlights from the 2026 American Association for Cancer Research (AACR) Annual Meeting demonstrate significant advances in ADC design, including dual- and multi-payload constructs, multispecific targeting strategies, and immunostimulatory payloads. These innovations aim to overcome key limitations such as tumor heterogeneity, resistance, and systemic toxicity. Novel approaches targeting the tumor microenvironment, including depletion of regulatory T cells and tumor-associated macrophages, further expand the therapeutic scope of ADCs beyond direct tumor cell killing. In parallel, integration with emerging modalities such as engineered CD16-enhanced natural killer T (NKT) cells underscores the potential for synergy between ADCs and cellular immunotherapies. Advances in AI-guided target discovery and antibody engineering are also enhancing tumor selectivity and internalization. Collectively, these developments highlight a paradigm shift toward precision, multi-mechanistic ADCs with the potential to improve clinical outcomes across diverse cancer types.