Hypoxia is a common feature in the majority of solid tumours, albeit with intra- and inter-patient variability, that arises due to a disturbed balance between proliferation and oxygen supply. Given its pivotal role in tumour progression and resistance to conventional therapies, including immunotherapy, several strategies have been developed to overcome tumour hypoxia, but none has been successful until now.
CP-506 is a HAP being developed for the treatment of malignant hypoxic tumours, with tighter activation properties compared to previous HAPs. Companion diagnostics, have been developed in parallel providing all possibilities to select the proper patient for this hypoxia-targeting therapy. The novel HAP has been specifically designed to have a bystander effect, aqueous solubility, oral bioavailability, and, importantly, no off-mechanism activation by the human aerobic reductase AKR1C3.

