Metagenomic gut microbiome analysis of Japanese patients with multiple chemical sensitivity/idiopathic environmental intoleranceOriginal paper
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Read MoreWhat was studied?
Researchers examined gut microbiome composition and function in Japanese women with multiple chemical sensitivity (MCS), a condition of unclear pathology thought to involve the central nervous system.
How was it studied?
Fecal samples from 30 consecutive Japanese female MCS patients underwent shotgun metagenomic sequencing, then were compared against 24 age and sex matched healthy controls.
What did they find?
Alpha and beta diversity did not differ between groups. Streptococcus, Veillonella, and Akkermansia were more abundant genera in MCS (fold changes 4.03, 1.53, 2.86). Akkermansia muciniphila was elevated (fold change 3.3) while Faecalibacterium prausnitzii was reduced (fold change 0.53). Functionally, xylene and dioxin degradation pathways were enriched, amino acid metabolism and synthesis pathways were depleted, and antimicrobial resistance pathways, including the two component system and cationic antimicrobial peptide resistance, were enriched.
Why it matters
Despite unchanged overall diversity, MCS patients show specific taxonomic and functional shifts tied to xenobiotic degradation and amino acid metabolism, offering candidate microbial targets for future MCS treatment research.