The aim of this trial is to identify biomarkers and genetic predisposition for the development of immune checkpoint related colitis.
Immunotherapy with immune checkpoint-inhibitors is standard treatment for patients with melanoma. However, in about 15% of patients treated with Ipilimumab a grade 3-4 colitis will occur. In programmed cell death protein 1 (PD1) inhibitors colitis is also seen as adverse event, although less prominent. We want to find a good predictive biomarker to select patients that are prone to colitis.So far no test is available that might be predictive whether a patient will develop a grade 3-4 colitis. The study will consists of four parts: 1.) to identify a genetic profile associated with ipilimumab-induced colitis, 2.) to identify predictive (serum or fecal) biomarkers for ipilimumab-induced colitis, 3.) to study the tissue of ipilimumab-induced colitis and 4) to study the role of the gut microbiome in the development of colitis. Patients are able to participate in one, or more parts of the study.
Study Type
OBSERVATIONAL
Enrollment
123
UMCG
Groningen, Netherlands
Genetic predisposition for immunotherapy-induced colitis
Difference in genetic profile on 99 confirmed inflammatory bowel disease (IBD) loci between patients who develop immunotherapy-induced colitis and who do not.
Time frame: 1 week
Predictive biomarkers for immunotherapy-induced colitis in stool and serum
Comparison of calprotectin levels in the stool and serum-levels of C reactive protein (CRP), endotoxin, citrulline, intestinal fatty acid-binding protein (I-FABP), calprotectin and interleukin 8 (IL8) between patients who develop immunotherapy-induced colitis and who do not.
Time frame: Day 0, 21, 42, 63
Clinical scoring system of colitis
Prediction of (severity of) colitis based on symptomatology measured with the MAYO score and BRISTOL stool scale.
Time frame: Day -7 to 85
Histological assessment of colon biopsies in patients that develop colitis
Immunotherapy-induced colitis will be assessed in colon biopsies when a sigmoidoscopy has to be performed for diagnostic reasons.
Time frame: 1 day
Analysis of the gut microbiome in stool samples
Microbiome analysis in stool collected before treatment and at 3, 6, and 9 weeks and correlation with development of immunotherapy-induced colitis.
Time frame: Day 0, 21, 42, 63
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