Inclusion criteria, exclusion criteria and study summary
CCS1477 is a new experimental medication (sponsored by CellCentric Ltd) for a type of prostate cancer called metastatic castration resistant prostate cancer (mCRPC). It is aimed at tumours that are not responsive to, or have become resistant to, existing medications used in late stage disease. CCS1477 may also be used for other cancers with specific gene mutations, again where existing treatments are no longer working. The purpose of this study is to examine the safety, tolerability, pharmacokinetics (PK) and efficacy of CCS1477 when treating patients with mCRPC, when given alone or in combination with other standard mCRPC therapies, and in treating patients with other solid tumour cancers which have a gene mutation in p300 or CBP. It is expected that approximately 150 patients will be recruited from up to 20 hospitals in the UK and US. The study has 5 parts consisting of dose escalation and expansion cohorts. Patients will have regular clinic visits for various safety and clinical benefit assessments, to monitor any side effects and to find out how CCS1477 is handled by the body and affects the tumour. The information gained in this study will help the sponsor to determine whether CCS1477 is suitable for further studies in humans.