腸内真菌と遺伝、疾患リスクとの関連を発見(Connection among gut fungi, genetics and disease risk in humans identified)

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2025-09-03 ペンシルベニア州立大学(PennState)

ペンシルベニア州立大学の研究で、ヒトの遺伝的変異と腸内真菌(マイコバイオーム)、慢性疾患リスクの関連が初めて明らかになった。Human Microbiome Projectの125人のデータ解析により、7つの染色体上で148の真菌関連遺伝子変異が特定され、9種類の真菌群との関連が見つかった。特に腸内酵母「Kazachstania」は、心血管疾患リスクと関連するCDH13遺伝子変異を持つ人で顕著に減少していた。さらに英国バイオバンクなど大規模データでも因果的関連が検証され、腸内真菌と遺伝子が心疾患リスクに影響を与えることが示唆された。本成果は、真菌が健康に及ぼす役割の解明を進め、将来的に個別化診断や微生物を用いた治療法開発につながる可能性を持つ。研究は『PLOS Biology』に掲載された。

腸内真菌と遺伝、疾患リスクとの関連を発見(Connection among gut fungi, genetics and disease risk in humans identified)A watercolor artist’s interpretation of the relationship between the human genome and gut mycobiome. A new genome-wide study by researchers at Penn State uncovered evidence of the first three-way relationships between human genetic variation, variation in the fungal component of the human microbiome — known as the mycobiome — and risk of developing chronic disease. Credit: Amy Bean/Creative Commons. All Rights Reserved.

<関連情報>

腸内真菌はヒトの遺伝的変異と疾患リスクに関連している Gut fungi are associated with human genetic variation and disease risk

Emily P. Van Syoc ,Emily R. Davenport,Seth R. Bordenstein
PLOS Biology  Published: September 2, 2025
DOI:https://doi.org/10.1371/journal.pbio.3003339

Abstract

Human genetic determinants of the gut mycobiome remain uninvestigated despite decades of research highlighting tripartite relationships between gut bacteria, genetic background, and disease. Here, we present the first genome-wide association study on the number and types of human genetic loci influencing gut fungi relative abundance. We detect 148 fungi-associated variants (FAVs) across 7 chromosomes that statistically associate with 9 fungal taxa. Of these FAVs, several occur in the protein-coding genes PTPRC, ANAPC10, NAV2, and CDH13. Additional FAVs link to tissue-specific gene expression as fungi-associated expression quantitative trait loci. Notably, the relative abundance of gut yeast Kazachstania associates with genetic variation in CDH13 encoding T-cadherin, a protein linked to cardiovascular disease. Kazachstania forms a causal relationship with cardiovascular disease risk in a mendelian two-sample randomization analysis. These findings establish previously unrecognized connections between human genetics, gut fungi, and chronic disease, broadening the paradigm of human-microbe interactions in the gut to the mycobiome.

医療・健康
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