CD70: An Emerging Anticancer Target in Renal Cell Carcinoma and Beyond.

CD70 is an emerging target for anticancer therapies. It is an ideal antigen target given its limited expression in normal physiologic tissues and propensity to be aberrantly expressed in a variety of malignancies, thus limiting off-target toxicities. It is also heavily involved in immune homeostasis, and disruption of this pathway can help overcome tumor-related immune cell exhaustion. Recent phase I/II trials using cellular therapies targeting CD70, such as chimeric antigen receptor-T cells, have shown promising effectiveness and safety in treating relapsed or refractory renal cell carcinoma. Noncellular therapies targeting CD70, such as antibody-drug conjugates, monoclonal antibodies, radionuclides, and cytokines, are currently under investigation, with early data showing encouraging results as well. Efforts are already underway to further improve and optimize CD70-based therapies.