New immune cell engagers for cancer immunotherapy

There have been major advances in the immunotherapy of cancer in recent years, including the development of T cell engagers — antibodies engineered to redirect T cells to recognize and kill cancer cells — for the treatment of haematological malignancies. However, the field still faces several challenges to develop agents that are consistently effective in a majority of patients and cancer types, such as optimizing drug dose, overcoming treatment resistance and improving efficacy in solid tumours. A new generation of T cell-targeted molecules was developed to tackle these issues that are potentially more effective and safer. In addition, agents designed to engage the antitumour activities of other immune cells, including natural killer cells and myeloid cells, are showing promise and have the potential to treat a broader range of cancers. Immune cell engagers — antibody-based molecules engineered to direct immune effector cells to recognize and kill cancer cells — represent a rapidly expanding approach in cancer therapy. Here, the authors bring us up to date with the targets, challenges and opportunities for harnessing the anticancer activities of T cells, natural killer cells and myeloid cells with immune cell engagers.