Recent advancements in immunotherapy have focused on enhancing the efficacy and specificity of treatments through innovative mechanisms. A study by Zhou et al. introduced a novel approach using bispecific antibodies and chimeric antigen receptor (CAR) T cells that target tumor-associated carbohydrate antigens with a density-dependent mechanism, aiming to minimize off-target toxicity while maximizing therapeutic effects (ref: Zhou doi.org/10.1016/j.cell.2025.09.001/). In a phase 2 trial, Rouce et al. demonstrated that tisagenlecleucel, a CAR T-cell therapy, achieved durable remissions in pediatric patients with relapsed or refractory B-cell acute lymphoblastic leukemia, highlighting the potential of CAR T-cell therapies despite transient high-grade toxicities (ref: Rouce doi.org/10.1038/s41577-025-01228-4/). Furthermore, Park et al. explored a photoresponsive nanoproteolysis-targeting chimera (Nano-PROTAC) that reprograms cancer metabolism to enhance pyroptosis-mediated immunotherapy, addressing the metabolic barriers that limit the efficacy of photodynamic therapy (ref: Park doi.org/10.1038/s41392-025-02405-6/). The tumor microenvironment (TME) plays a critical role in shaping the response to immunotherapy. Xiao et al. utilized single-cell RNA sequencing to uncover metabolic interactions between tumors and macrophages in triple-negative breast cancer, revealing that heme binding protein 2 (HEBP2) governs glutamine competition, which significantly impacts immunotherapy efficacy (ref: Xiao doi.org/10.1016/j.cmet.2025.08.009/). Additionally, the ESMO-ESTRO consensus statements emphasized the need for evidence-based guidelines on the safety of combining radiotherapy with immune checkpoint inhibitors, acknowledging the potential for improved outcomes alongside increased toxicity (ref: van Aken doi.org/10.1016/j.annonc.2025.09.008/). Storey et al. introduced a targeted radio-immunotheranostic approach using a monoclonal antibody against LRRC15, which could deplete pro-tumorigenic mechanisms and enhance immunotherapy resistance (ref: Storey doi.org/10.1038/s41392-025-02410-9/). Overall, these studies underscore the multifaceted strategies being developed to enhance immunotherapy efficacy while addressing the challenges posed by the TME.