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New Molecular Insights into the Gut Microbiome

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Microbiology".

Deadline for manuscript submissions: 25 June 2024 | Viewed by 615

Special Issue Editor


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Guest Editor
Department of Food and Nutrition, Research Institute of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea
Interests: functional foods; probiotics; microbiome; gut microbiota

Special Issue Information

Dear Colleagues,

The human gut microbiome is closely linked to various immuno-metabolic disorders. It plays an essential role in the transformation and absorption of dietary nutrients, metabolic homeostasis of the host, and changes in immune profiles by producing microbial metabolites and microbe-associated macromolecules. The gut microbiota is responsible for the production of short-chain fatty acids, secondary bile acids, and amino acid metabolites, which control insulin resistance, liver steatosis, gut permeability, and neurotransmitter production through GPCR, FXR, GLP-1, and the serotonin signaling pathway. Additionally, some bacterial strains produce extracellular polysaccharides, peptidoglycans, and exosomes that modulate the host's immune system in autoimmune diseases and cancer, thereby enhancing the differentiation and function of specific immune cell populations. A better understanding of the molecular mechanisms of the gut microbiome will provide valuable information for further translational research and the development of microbiome therapeutics.This Special Issue, entitled “New Molecular Insights in Gut Microbiome”, will focus on the molecular mechanisms and MoA of the gut microbiome in the pathogenesis of immuno-metabolic diseases. Original research and review papers related to various aspects of biochemistry, molecular biology, pharmacology, physiology, and pathology will be considered for this Special Issue.

Prof. Dr. Hyunju You
Guest Editor

Manuscript Submission Information

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Keywords

  • microbiome
  • gut microbiota
  • nutraceuticals
  • immuno-metabolic diseases

Published Papers (1 paper)

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Research

15 pages, 4622 KiB  
Article
Deciphering the Impact of Defecation Frequency on Gut Microbiome Composition and Diversity
by Gwoncheol Park, Seongok Kim, WonJune Lee, Gyungcheon Kim and Hakdong Shin
Int. J. Mol. Sci. 2024, 25(9), 4657; https://doi.org/10.3390/ijms25094657 - 25 Apr 2024
Viewed by 361
Abstract
This study explores the impact of defecation frequency on the gut microbiome structure by analyzing fecal samples from individuals categorized by defecation frequency: infrequent (1–3 times/week, n = 4), mid-frequent (4–6 times/week, n = 7), and frequent (daily, n = 9). Utilizing 16S [...] Read more.
This study explores the impact of defecation frequency on the gut microbiome structure by analyzing fecal samples from individuals categorized by defecation frequency: infrequent (1–3 times/week, n = 4), mid-frequent (4–6 times/week, n = 7), and frequent (daily, n = 9). Utilizing 16S rRNA gene-based sequencing and LC-MS/MS metabolome profiling, significant differences in microbial diversity and community structures among the groups were observed. The infrequent group showed higher microbial diversity, with community structures significantly varying with defecation frequency, a pattern consistent across all sampling time points. The Ruminococcus genus was predominant in the infrequent group, but decreased with more frequent defecation, while the Bacteroides genus was more common in the frequent group, decreasing as defecation frequency lessened. The infrequent group demonstrated enriched biosynthesis genes for aromatic amino acids and branched-chain amino acids (BCAAs), in contrast to the frequent group, which had a higher prevalence of genes for BCAA catabolism. Metabolome analysis revealed higher levels of metabolites derived from aromatic amino acids and BCAA metabolism in the infrequent group, and lower levels of BCAA-derived metabolites in the frequent group, consistent with their predicted metagenomic functions. These findings underscore the importance of considering stool consistency/frequency in understanding the factors influencing the gut microbiome. Full article
(This article belongs to the Special Issue New Molecular Insights into the Gut Microbiome)
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