Review of T cell engagers highlights potential for treating solid tumors and small cell lung cancer cases
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Key Takeaway
T cell engagers show promise for solid tumors but require more data on safety and efficacy before standard use.
T cell engagers represent a novel class of immunotherapies designed to redirect T cells against tumor antigens. These agents are being evaluated for their efficacy in treating various solid tumors, with a particular focus on small cell lung cancer. The mechanism involves engaging endogenous T cells to enhance the immune response against malignant cells.
Despite the theoretical promise, comprehensive clinical data remains scarce. Most available information consists of early-phase trials or preclinical studies rather than large-scale confirmatory research. Consequently, the full spectrum of efficacy and safety has not yet been established in the broader patient population.
Safety profiles for these agents are not fully characterized in current reports. Discontinuations due to adverse events and overall tolerability require closer monitoring as the technology matures. Future studies must address these gaps to determine the true clinical value of T cell engagers in oncology practice.
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View Original Abstract ↓
T cell engagers (TCEs) are a class of T cell–redirecting therapeutics that enhance antitumor immunity by bringing T cells into close proximity with malignant cells. Following their success in hematologic malignancies, TCEs are now being increasingly investigated for the treatment of solid tumors. The recent approval of tarlatamab for small cell lung cancer (SCLC) offers renewed hope in this setting. Nevertheless, clinical efficacy in solid tumors remains limited by immunosuppressive tumor microenvironments (TME), on-target/off-tumor toxicity, and intrinsic or acquired resistance to TCEs. This review summarizes recent advances in TCE development for solid tumors, including refinements in molecular design, biomarker-guided patient selection, and rational combination strategies aimed at overcoming resistance and improving therapeutic outcomes. We also discuss emerging next-generation approaches, such as engager platforms that redirect other immune effector cells. Collectively, these innovations underscore the potential of more precise and effective engager-based therapies for solid tumors.
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