Commensal microbiota contribute to gut homeostasis by inducing transcription of mucosal genes. Analysis of the impact of various microbiota on intestinal tissue provides an important insight into the function of this organ. We used cDNA microarrays to determine the gene expression signature of mucosa isolated from the small intestine and colon of germ-free (GF) mice and animals monoassociated with two E. coli strains. The results were compared to the expression data obtained in conventionally reared (CR) mice. In addition, we analyzed gene expression in colon organoids derived from CR, GF, and monoassociated animals. The analysis revealed that the complete absence of intestinal microbiota mainly affected the mucosal immune system, which was not restored upon monoassociation. The most important expression changes observed in the colon mucosa indicated alterations in adipose tissue and lipid metabolism. In the comparison of differentially expressed genes in the mucosa or organoids obtained from GF and CR mice, only six genes were common for both types of samples. The results show that the increased expression of the angiopoietin-like 4 (Angptl4) gene encoding a secreted regulator of lipid metabolism indicates the GF status.

• Klíčová slova
• Enricher tool, Onecut2, expression profiling, microbiota, monoassociation,
• MeSH
• biologické markery metabolismus   MeSH
• Escherichia coli fyziologie   MeSH
• gnotobiologické modely genetika   MeSH
• imunitní systém metabolismus   MeSH
• kolon metabolismus   MeSH
• mikrobiota MeSH
• myši inbrední BALB C MeSH
• organoidy metabolismus   MeSH
• regulace genové exprese MeSH
• slizniční imunita MeSH
• stanovení celkové genové exprese * MeSH
• střevní sliznice metabolismus   MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• biologické markery MeSH