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Gut-blood-liver axis: Circulating microbiome as non-invasive biomarker for Inflammatory bowel disease (IBD) and Primary sclerosing cholangitis (PSC)
Project partners:
Oslo University Hospital (NO)
Latvian Biomedical Research and Study Centre (LV)
University of Tartu (EE)
Project website
Project summary:
Gut microbiome has been shown to play a crucial role in ulcerative colitis (UC) and is impaired in a related extraintestinal autoimmune condition - primary sclerosing cholangitis (PSC). One of the consequences that are associated with chronic inflammation of the intestinal mucosa is increased intestinal permeability, the so-called “leaky gut phenomenon”, which might provoke bacterial translocation to the blood through the gut-blood-liver axis. Recently, it has been reported that a considerable amount and highly divergent bacterial traces can be found in human blood samples; however, circulating blood microbiome and its diagnostic potential has not been previously investigated in UC and PSC. Therefore, in this project, a multidisciplinary research team composed of clinicians, molecular biologists and biostatisticians from Norway and Baltic countries is aiming to determine circulating blood microbiome signatures in UC and related autoimmune liver disease - PSC. This aim will be achieved through the use of very well-defined large patient cohorts, advanced metagenomic sequencing techniques, and bioinformatical analysis. In addition, with the use of a germ-free UC mice model, mechanistic insights of bacterial transfer to the blood circulation will be evaluated. The project will generate clinically relevant data on the diagnostic and prognostic value of the specific circulating blood microbiota profiles, that could benefit to the generation of new non-invasive tools in the personalized management of UC and PSC.