宏基因组组装基因组(MAGs)表明,在艰难梭菌破坏的肠道微生物群中,乙酸盐可能发挥了保护作用。

Metagenome-assembled genomes (MAGs) suggest an acetate-driven protective role in gut microbiota disrupted by Clostridioides difficile.

机构信息

Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia.

Unidad de Bioprospección and Estudio de Microbiomas, Programa de Estudio y Control de Enfermedades Tropicales (PECET), Sede de Investigación Universitaria, Universidad de Antioquia, Medellín, Colombia; Semillero de Investigación en Bioinformática - GenomeSeq, Seccional Oriente, Universidad de Antioquia, Medellín, Colombia; Grupo de Fundamentos y Enseñanza de la Física y las Sistemas Dinámicas, Instituto de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Medellín, Colombia.

出版信息

Microbiol Res. 2024 Aug;285:127739. doi: 10.1016/j.micres.2024.127739. Epub 2024 Apr 30.

Abstract

Clostridioides difficile may have a negative impact on gut microbiota composition in terms of diversity and abundance, thereby triggering functional changes supported by the differential presence of genes involved in significant metabolic pathways, such as short-chain fatty acids (SCFA). This work has evaluated shotgun metagenomics data regarding 48 samples from four groups classified according to diarrhea acquisition site (community- and healthcare facility-onset) and positive or negative Clostridioides difficile infection (CDI) result. The metagenomic-assembled genomes (MAGs) obtained from each sample were taxonomically assigned for preliminary comparative analysis concerning differences in composition among groups. The predicted genes involved in metabolism, transport, and signaling remained constant in microbiota members; characteristic patterns were observed in MAGs and genes involved in SCFA butyrate and acetate metabolic pathways for each study group. A decrease in genera and species, as well as relative MAG abundance with the presence of the acetate metabolism-related gene, was evident in the HCFO/- group. Increased antibiotic resistance markers (ARM) were observed in MAGs along with the genes involved in acetate metabolism. The results highlight the need to explore the role of acetate in greater depth as a potential protector of the imbalances produced by CDI, as occurs in other inflammatory intestinal diseases.

摘要

艰难梭菌可能会对肠道微生物群落的多样性和丰度产生负面影响,从而引发功能变化,这一变化得到了参与重要代谢途径(如短链脂肪酸(SCFA))的基因差异存在的支持。本研究评估了来自四个组别的 48 个样本的鸟枪法宏基因组学数据,这些样本是根据腹泻发病部位(社区和医疗机构发病)以及艰难梭菌感染(CDI)结果阳性或阴性进行分类的。从每个样本中获得的宏基因组组装基因组(MAG)被分类,以便对组间组成差异进行初步比较分析。参与代谢、运输和信号转导的预测基因在微生物群成员中保持不变;在每个研究组的 MAG 和涉及 SCFA 丁酸和乙酸代谢途径的基因中观察到特征模式。在 HCFO/-组中,伴随着与乙酸代谢相关基因的存在,属和种的减少以及相对 MAG 丰度的减少是显而易见的。与乙酸代谢相关的基因一起,在 MAG 中观察到了更多的抗生素耐药性标记(ARM)。研究结果强调需要更深入地探索乙酸作为 CDI 引起的失衡的潜在保护者的作用,因为这在其他炎症性肠道疾病中也有发生。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索