This study is a prospective, open label, multi-centre phase 2 trial which assesses the efficacy and safety of standard dosing compared to extended dosing interval of nivolumab, atezolizumab or pembrolizumab in advanced/unresectable gastric/gastroesophageal junction/oesphageal adenocarcinomas with PDL1 CPS ≥5%, hepatocellular carcinoma andnon-small cell lung cancer with PDL1 TPS≥50% with no prior treatment. The investigators hypothesize that nivolumab, pembrolizumab and atezolizumab can be used efficiently at extended dosing intervals, compared to their approved labels with comparable clinical outcome.
Provision of informed consent prior to any study-specific procedure
Cohort A: Previously untreated locally advanced/metastatic HER2 -ve gastric/gastroesophageal junction/esophageal (PDL1 CPS ≥5% adenocarcinomas not amenable to curative surgery or radiotherapy who are above to begin platinum double and nivolumab.
Cohort B: Previously untreated locally advanced/metastatic Child's A hepatocellular carcinoma not amenable to curative surgery or radiotherapy who are above to begin atezolizumab and bevacizumab.
Cohort C: Previously untreated locally advanced/metastatic lung adenocarcinoma (PDL1 TPS≥50%, EGFR/ALK wildtype) not amenable to curative surgery or radiotherapy who are above to begin pembrolizumab monotherapy
Patients who have previously received immune checkpoint inhibitors or investigational monoclonal antibody therapy.
Patients with second primary cancer, except: adequately treated non-melanoma skin cancer, curatively treated in-situ cancer of the cervix, or other solid tumours curatively treated with no evidence of disease for ≥ 5 years
Unstable spinal cord compression/brain metastases unless asymptomatic and not requiring steroids for at least 2 weeks prior to the start of study treatment. For patients with brain metastases, gamma knife or stereotactic brain surgery is allowed prior to study treatment.
Major surgery within 4 weeks of starting study treatment and patients must have recovered from any effects of any major surgery. Minor surgery is allowed.
6
Treatment groupsSee each treatment group below.