Multi-omics Database Construction of Healthy Korean Volunteers

Study Overview
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Brief Summary
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The goal of this prospective, observational study is to collect health-related data including microbiome, blood samples, and dietary habits from the oral and gastrointestinal tracts in healthy subjects. In addition, the study aims to perform microbiome and multi-omics analysis on the collected samples and build an integrated database of the data.

Official Title
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Clinical Study for Multi-omics Database Construction of a Cohort of Healthy Korean Volunteers for Integrative Microbiome Analysis

Conditions
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Healthy

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects who are at least 13 years old and no older than 85 years old at the time of giving their informed consent. Subjects who have received a comprehensive explanation of this study, fully understand it, and have voluntarily agreed to participate, providing signed and dated informed consent. Subjects considered eligible for participation in the study by the researcher, based on screening procedures including physical examination, clinical laboratory tests, and questionnaires. Exclusion Criteria: Subjects with a Body Mass Index (BMI) below 17.0 or above 30.0. Vital signs at rest showing a systolic blood pressure ≥ 160 mmHg or diastolic blood pressure ≥ 100 mmHg, along with symptoms related to high blood pressure such as headaches. History of using specified drugs within a predetermined period before microbiome collection, as detailed in the Appendix. Receipt of any vaccination within the last 4 weeks prior to microbiome collection. Use of topical antibiotics or steroids on the face, scalp, neck, arms, forearms, or hands within 24 hours before microbiome collection. Application of vaginal or vulvar medications, including antifungals, within 24 hours of microbiome collection. Presence of an acute disease at the time of enrollment. Acute disease is defined as the presence of a moderate or severe illness with or without fever. Sampling can be deferred until the subject recovers. History of chronic, clinically significant disorders affecting the hepatic, digestive, circulatory, renal, neurological, respiratory, endocrine, immune, or hematological systems, as well as malignant tumors, psychiatric conditions, or substance abuse. Substantial dietary alterations for rapid weight gain or loss within 4 weeks of the microbiome collection. Positive serological tests (HBs antigen, HCV antibody, and HIV antibody tests) or results above the reference range. History of gastrointestinal surgery, excluding simple procedures like appendectomy, cholecystectomy, or hernia repair. Presence of gastrointestinal conditions that may influence microbiome analysis and are not under medical control, including Inflammatory Bowel Disease (IBD) including Crohn's disease and ulcerative colitis, Irritable Bowel Syndrome (IBS) requiring medication, ulcers, acute or chronic pancreatitis, and chronic constipation requiring medication. Diagnosis of ankylosing spondylitis. Requirement for the regular use of incontinence diapers. Positive pregnancy test, or being pregnant or lactating. Any medical condition suspected at the time of microbiome collection that may affect the integrity of the sample.

Ages Eligible for Study
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Minimum Age: 13 Years
Maximum Age: 85 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Relative abundance of microbome | Analysis of the microbial community composition will be performed using 16s rRNA gene amplicon sequencing. The relative abundance of microbial species at the genus or family level will be assessed. | 5 years | 
| Alpha diversity of microbiome | Alpha diversity will be measured using Shannon diversity index, Fisher's index, and Faith's phylogenetic diversity whole tree. | 5 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Gene count and abundance (transcriptomics) | Analysis of bacterial mRNA profiles will be performed through read mapping using NCBI RefSeq database, quantification of gene and transcript & bacterial taxonomic profiling using HUMAnN and MetaPhlAn pipeline, transcript quantification and identification of differentially expressed gene using SALMON and human reference genome fastq file. | 5 years | 
| Metabolite peak area (metabolomics) | Analysis of metabolites will be performed by matching metabolite ID achieved from LC/MS with Human Metabolome Database (HMDB) for metabolite identification. Analysis on the difference of metabolite between groups will be performed by PCA or PLS-DA using MZmine3, OpenChrome or Metaboanalyst v5.0. | 5 years | 
| Relative abundance (virome) | Analysis of total virus profiles will be performed by comparing viral protein sequence with NCBI refseq viral database and taxonomy annotation. | 5 years | 
| Identification of isolated bacterial strain (culturomics) | Bacterial strains that exhibit differential abundance between healthy individuals and patients will be inoculated, isolated, and identified. | 5 years |