Overview
The overall aim of this pilot study is to prospectively monitor programmed death-ligand 1 (PD-L1) expression dynamics in vivo, during neoadjuvant chemoradiotherapy (CRT) or short-course preoperative radiotherapy (SCPRT) in rectal and esophageal cancer by a positron emission tomography (PET) imaging approach.
Eligibility
Inclusion Criteria:
- 18 years of age and older
- All sexes
- Histologically confirmed carcinoma of the rectum or oesophagus (squamous cell carcinoma and adenocarcinoma, including oesophago-gastric junction cancers)
- Medical need for a neoadjuvant CRT/SCPRT
- Suitable to withstand the course of neoadjuvant CRT/SCPRT
- Written informed consent form (ICF) for participation in the study
Exclusion Criteria:
- Metastatic disease, which is considered incurable by local therapies (expect for oligometastatic disease with a curative intend)
- Previous surgery of the tumor other than biopsy
- Pregnancy, breastfeeding or expectancy to conceive
- Prior therapy with anti-CTLA-4, anti-PD-1, anti-PD-L1, anti-PD-L2 or any other agent directed against co-inhibitory T cell receptors or has previously participated in clinical studies with immunotherapy
- Disagreement of participants with reproductive potential to use contraception throughout the study period and for up to 180 days after the last dose of study therapy
- Hepatitis B or C
- Human immunodeficiency virus (HIV)
- Immunodeficiency
- Allogeneic tissue or solid organ transplantation
- Autoimmune disease that has required systemic therapy in the past 2 years with modifying agents, steroids or immunosuppressive drugs
- Active non-infectious pneumonitis
- Active infection requiring systemic therapy
- Systemic steroids or any other form of immunosuppressive therapy within 7 days prior to the first dose of study treatment
- Diagnosed and/or treated additional malignancy within 5 years of randomization, with the exception of curatively-treated basal cell or squamous cell carcinoma of the skin and/or curatively-resected in situ cervical and/or breast cancers
- Treatment with botanical preparations (i.e. herbal supplements or traditional Chinese medicines) intended for general health support or to treat the disease under study within 2 weeks prior to randomization/treatment
- Participants with serious or uncontrolled medical disorders
- Uncontrolled or significant cardiovascular disease (myocardial infarction, uncontrolled angina, any history of clinically significant arrhythmias, QTc prolongation in males > 450 ms and > 470 ms in females, participants with history of myocarditis)
- Allergies and adverse drug reaction (history of allergy or hypersensitivity to study drug components, contraindications to any of the study drugs of the chemotherapy regimen)
- Other exclusion criteria: Prisoners or participants who are involuntarily incarcerated, participants who are compulsorily detained for treatment of either a psychiatric or physical (i.e. infectious disease) illness