The effect of immunoregulatory bacteria on the transcriptional activity of Foxp3 and RORyt genes in the gut-associated lymphoid tissue with Salmonella-induced inflammation in the presence of vancomycin and Bacteroides fragilis
| Autor: | Marina Thyhonovska, Inna Krynytska, Mariya Marushchak, Aleksandr Kamyshnyi, Mariya Koval, Yuliia Bukina |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Microbiology (medical)
Gut-associated lymphoid tissue Bacteroids lcsh:QR1-502 Faecalibacterium prausnitzii 01 natural sciences Microbiology Immunoregulation lcsh:Microbiology Salmonella Clostridium Vancomycin 0502 economics and business medicine Genes expression 0101 mathematics Colitis biology 010102 general mathematics 05 social sciences FOXP3 biology.organism_classification medicine.disease medicine.anatomical_structure Original Article Bacteroides fragilis 050203 business & management Akkermansia muciniphila medicine.drug |
| Zdroj: | Iranian Journal of Microbiology Scopus-Elsevier Iranian Journal of Microbiology, Vol 12, Iss 3 (2020) |
| ISSN: | 2008-4447 2008-3289 |
| Popis: | Background and Objectives: Intestinal microbiota is involved in the development and maintenance of immune homeosta- sis. This study was conducted to investigate the levels of key immunoregulatory bacteria in the intestinal wall-associated microflora and its effect on the transcriptional activity of the Foxp3 and RORyt genes in the gut-associated lymphoid tissue (GALT) of rats with Salmonella-induced inflammation, both untreated and treated with vancomycin and Bacteroides fragilis. Materials and Methods: To determine the levels of immunoregulatory bacteria in GALT of rats Q-PCR was used to identify them by species-specific 16S rDNA genes. Transcriptional activity of Foxp3 and RORyt genes was determined using Q-PCR with reverse transcription. Results: In animals treated with both vancomycin and Salmonella, the levels of segmented filamentous bacteria (SFB) in- creased while Akkermansia muciniphila and Faecalibacterium prausnitzii decreased. In rats that received pretreatment with vancomycin and then were infected with S. Enteritidis and S. Typhimurium, the levels of SFB increased, and the number of Bacteroides-Prevotela group, A. muciniphila, Clostridium spp. clusters XIV, IV, and F. prausnitzii significantly decreased, decreasing Foxp3 and increasing Rorγt mRNA expression. Administration of B. fragilis to animals treated with S. Enteriti- dis or S. Typhimurium and pre-treated with vancomycin caused a decrease in SFB and Rorγt mRNA levels and conversely, increased the numbers of the Bacteroides-Prevotela group, Clostridium spp. clusters XIV, IV, A. muciniphila, F. prausnitzii and Foxp3 gene expression in GALT. Conclusion: Our results suggest that the commensal microorganism B. fragilis may provide a protective role against the development of experimental colitis, which has to be taken into consideration for further clarification of the effective thera- peutic strategy of inflammatory bowel diseases, irritable bowel syndrome and necrotising colitis. |
| Databáze: | OpenAIRE |
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