ArticleMicrobiome2026
Intracellular microbial signals in the gastrointestinal tract of dairy cattle.
Article in Microbiome, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
backgroundThe presence of intracellular microbiota in epithelial cells of gastrointestinal tracts (GITs) of dairy cows, as well as their associations with rumen development, remains unclear.
resultsUsing a single-cell analysis of host-microbiome interactions (SAHMI) within a single-cell atlas derived from ten GITs tissue types collected from new-born (NB) and adult (AD) cows, we found that 20.5% of the single-cell RNA sequencing reads aligned to reference microbial genomes after filtering low-quality single cells and doublets. Comparative analysis revealed that abomasum tissue exhibited the highest proportion of cells detected microbial signals, with Paneth cells possessing the most genes classified as both marker genes and those related to microbial signals. In the NB rumen, Basal cells demonstrated the greatest overlap between differentially expressed genes in AD vs. NB comparison and the microbial signal-related genes. Notably, these microbiota-associated genes, which are mainly linked to Aliiroseovarius crassostreae, Enterobacter sp. T2, and Enzebya pacifica, are implicated in nucleotide excision repair mechanisms, including DNA replication and the cell cycle. Furthermore, bacterial fluorescence in situ hybridization (FISH) analysis indicated that these three microbial species were partially localized within the cytoplasm and nucleus of rumen epithelial cells in NB cattle.
conclusionsThese findings provide substantial evidence supporting the existence of an intracellular microbiome within the GITs of dairy cattle and highlight their potential relationships with rumen development. This research enhances our understanding of the crosstalk between hosts and microbiome during the maturation of ruminants. Video Abstract.
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