Under normal conditions, CD70, member of the tumour necrosis factor family, is only transiently expressed on activated T and B cells. Instead, constitutive expression of CD70 has been described on malignant cells in a range of solid and haematological malignancies. Through its receptor, CD27, the expression of CD70 can facilitate evasion of the immune system by three important mechanisms: induction of T cell apoptosis, T cell exhaustion and increasing the amount of suppressive regulatory T cells. The general aim of this thesis was to investigate the role of CD70 in solid tumour types and explore promising combination strategies for anti-CD70 therapy. Thereby, we focused on the role of CD70 in non-small cell lung cancer and colorectal cancer.

(BELG J MED ONCOL 2019;13(2):54–59)