Gut Microbiome in Inflammatory Bowel Disease

This prospective cohort study aims to build a gut microbiome library for Korean IBD patients, and also aims to explore gut microbial signatures along with distinct clinical/genetic features and their potential interplay using the investigator's multi-omics analysis platform.

After signing the informed consent, various biological samples (fecal, mucosal and blood samples) as well as comprehensive clinical data (including psychometric evaluations using patient survey) will be obtained from patients periodically.

The multi-omics investigations will comprise: metagenomics (16s RNA sequencing and whole metagenomic sequecing), metabolomics, human genomics (genome-wide SNP data, whole exome and genome sequencing), transcriptomics, proteomics, epigenetics and single-cell multi-omics analysis. In vitro and in vivo study using fecal samples will be conducted.

In brief, after extracting the DNA from blood samples, whole genome sequencing will be performed and data will be compared with the previously reported variances. Novel variances or incidence of specific variances will be measured. Fecal sample will be collected and microbiome composition of each study subjects will be analyzed. Fecal microbial diversity will be measured from sequencing data of 16S ribosomal RNA which is highly preserved area of genetic information amongst microorganisms. Colonic mucosal sample will be collected when routine endoscopic surveillance is planned. Sample will be collected from diseased and normal mucosal altogether for analysis. Microbial diversity will be measured from 16S RNA sequencing data of the samples.

The multi-omics data will be analyzed with comprehensive clinical metadata using an integrated bioinformatics analysis platform. Clinical data include demographics, disease characteristics and variouis patient-reported outomes data (including health-related quality of life, anxiety, depression and others). Patient-reported outcomes data will be collected using validated questionnaires periodically.

Data from basic analysis will be re-explore in terms of inter-individual difference, difference between disease characteristics (such as disease phenotype, type of medical treatment and serologic markers), difference between psychosocial characteristics (such as the presence of anxiety or depression and quality of life) and etc. In addition, data from basic analysis will be used as the reference for the Korean IBD patient and it will be compared with other data obtained from the "different ethnicity" or "healthy" Korean population.

In conclusion, this long term, large-scale prospective study will provide a platform for studying a field of translational medicine to reveal hidden signatures of gut microbiome underlying IBD and to identify potential biological markers in IBD.

• Taxonomic profiling of gut microbiome [Срок оценки: Up to 10 years]
• Finding of single nucleotide polymorphisms (SNPs) [Срок оценки: Up to 10 years]
• Finding of serologic biomarkers [Срок оценки: Up to 10 years]
• Correlation between host genotyping and gut microbiome [Срок оценки: Up to 10 years]
• Liquid biopsy biosignatures assessed by single cell RNA-Seq [Срок оценки: Up to 10 years]