Induction Effects Of Bacteroides Fragilis Derived Outer Membrane Vesicles On Toll Like Receptor 2, Toll Like Receptor 4 Genes Expression And Cytokines Concentration In Human Intestinal Epithelial Cells
Objective Gastrointestinal (GI) tract, like other mucosal surface, is colonized with a microbial population known as gut microbiota. Outer membrane vesicles (OMVs) which are produced by gram negative bacteria could be sensed by Toll like receptors (TLRs). The interaction between gut microbiota and...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Royan Institute (ACECR), Tehran
2018-12-01
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| Series: | Cell Journal |
| Subjects: | |
| Online Access: | https://celljournal.org/journal/article/abstract/5750 |
| _version_ | 1818063474374213632 |
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| author | Sara Ahmadi Badi Shohreh Khatami Shiva Irani Seyed Davar Siadat |
| author_facet | Sara Ahmadi Badi Shohreh Khatami Shiva Irani Seyed Davar Siadat |
| author_sort | Sara Ahmadi Badi |
| collection | DOAJ |
| description | Objective
Gastrointestinal (GI) tract, like other mucosal surface, is colonized with a microbial population known as gut microbiota. Outer membrane vesicles (OMVs) which are produced by gram negative bacteria could be sensed by Toll like receptors (TLRs). The interaction between gut microbiota and TLRs affects homeostasis and immune responses. In this study, we evaluated TLR2, TLR4 genes expression and cytokines concentration in Caco-2 cell line treated with Bacteroides fragilis (B. fragilis) and its OMVs.
Materials And Methods
In this experimental study, OMVs were extracted using sequential centrifugation and their physicochemical properties were evaluated as part of quality control assessment. Caco-2 cells were treated with B. fragilis and its OMVs (180 and 350 µg/ml). Quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) was performed to assess TLR2 and TLR4 mRNA expression levels. Pro-inflammatory (IFNᵧ) and anti-inflammatory (IL- 4 and IL-10) cytokines were evaluated by ELISA.
Results
B. fragilis significantly decreased TLR2 and slightly increased TLR4 mRNA levels in Caco-2 cell line. The TLR2 mRNA level was slightly increased at 180 and 350 µg/ml of OMVs. Conversely, the TLR4 mRNA level was decreased at 180 µg/ml of OMVs, while it was significantly increased at 350 µg/ml of OMVs. Furthermore, B. fragilis and its OMVs significantly increased and decreased IFNᵧ concentration, respectively. Anti-inflammatory cytokines were increased by B. fragilis and its OMVs.
Conclusion
B. fragilis and its OMVs have pivotal role in the cross talk between gut microbiota and the host especially in the modulation of the immune system. Based on the last studies on immunomodulatory effect of B. fragilis derived OMVs on immune cells and our results, we postulate that B. fragilis derived OMVs could be possible candidates for the reduction of immune responses. |
| first_indexed | 2024-12-10T14:20:41Z |
| format | Article |
| id | doaj.art-f11d83c5cd5345c2838b62f067102b67 |
| institution | Directory Open Access Journal |
| issn | 2228-5806 2228-5814 |
| language | English |
| last_indexed | 2024-12-10T14:20:41Z |
| publishDate | 2018-12-01 |
| publisher | Royan Institute (ACECR), Tehran |
| record_format | Article |
| series | Cell Journal |
| spelling | doaj.art-f11d83c5cd5345c2838b62f067102b672022-12-22T01:45:12ZengRoyan Institute (ACECR), TehranCell Journal2228-58062228-58142018-12-01211576110.22074/cellj.2019.5750Induction Effects Of Bacteroides Fragilis Derived Outer Membrane Vesicles On Toll Like Receptor 2, Toll Like Receptor 4 Genes Expression And Cytokines Concentration In Human Intestinal Epithelial CellsSara Ahmadi Badi0Shohreh Khatami1Shiva Irani2Seyed Davar Siadat3Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, IranDepartment of Biochemistry, Pasteur Institute of Iran, Tehran, IranDepartment of Biology, Science and Research Branch, Islamic Azad University, Tehran, IranDepartment of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, IranObjective Gastrointestinal (GI) tract, like other mucosal surface, is colonized with a microbial population known as gut microbiota. Outer membrane vesicles (OMVs) which are produced by gram negative bacteria could be sensed by Toll like receptors (TLRs). The interaction between gut microbiota and TLRs affects homeostasis and immune responses. In this study, we evaluated TLR2, TLR4 genes expression and cytokines concentration in Caco-2 cell line treated with Bacteroides fragilis (B. fragilis) and its OMVs. Materials And Methods In this experimental study, OMVs were extracted using sequential centrifugation and their physicochemical properties were evaluated as part of quality control assessment. Caco-2 cells were treated with B. fragilis and its OMVs (180 and 350 µg/ml). Quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) was performed to assess TLR2 and TLR4 mRNA expression levels. Pro-inflammatory (IFNᵧ) and anti-inflammatory (IL- 4 and IL-10) cytokines were evaluated by ELISA. Results B. fragilis significantly decreased TLR2 and slightly increased TLR4 mRNA levels in Caco-2 cell line. The TLR2 mRNA level was slightly increased at 180 and 350 µg/ml of OMVs. Conversely, the TLR4 mRNA level was decreased at 180 µg/ml of OMVs, while it was significantly increased at 350 µg/ml of OMVs. Furthermore, B. fragilis and its OMVs significantly increased and decreased IFNᵧ concentration, respectively. Anti-inflammatory cytokines were increased by B. fragilis and its OMVs. Conclusion B. fragilis and its OMVs have pivotal role in the cross talk between gut microbiota and the host especially in the modulation of the immune system. Based on the last studies on immunomodulatory effect of B. fragilis derived OMVs on immune cells and our results, we postulate that B. fragilis derived OMVs could be possible candidates for the reduction of immune responses.https://celljournal.org/journal/article/abstract/5750Bacteroides fragilisGut MicrobiotaMembrane VesiclesToll Like Receptors |
| spellingShingle | Sara Ahmadi Badi Shohreh Khatami Shiva Irani Seyed Davar Siadat Induction Effects Of Bacteroides Fragilis Derived Outer Membrane Vesicles On Toll Like Receptor 2, Toll Like Receptor 4 Genes Expression And Cytokines Concentration In Human Intestinal Epithelial Cells Cell Journal Bacteroides fragilis Gut Microbiota Membrane Vesicles Toll Like Receptors |
| title | Induction Effects Of Bacteroides Fragilis Derived Outer Membrane Vesicles On Toll Like Receptor 2, Toll Like Receptor 4 Genes Expression And Cytokines Concentration In Human Intestinal Epithelial Cells |
| title_full | Induction Effects Of Bacteroides Fragilis Derived Outer Membrane Vesicles On Toll Like Receptor 2, Toll Like Receptor 4 Genes Expression And Cytokines Concentration In Human Intestinal Epithelial Cells |
| title_fullStr | Induction Effects Of Bacteroides Fragilis Derived Outer Membrane Vesicles On Toll Like Receptor 2, Toll Like Receptor 4 Genes Expression And Cytokines Concentration In Human Intestinal Epithelial Cells |
| title_full_unstemmed | Induction Effects Of Bacteroides Fragilis Derived Outer Membrane Vesicles On Toll Like Receptor 2, Toll Like Receptor 4 Genes Expression And Cytokines Concentration In Human Intestinal Epithelial Cells |
| title_short | Induction Effects Of Bacteroides Fragilis Derived Outer Membrane Vesicles On Toll Like Receptor 2, Toll Like Receptor 4 Genes Expression And Cytokines Concentration In Human Intestinal Epithelial Cells |
| title_sort | induction effects of bacteroides fragilis derived outer membrane vesicles on toll like receptor 2 toll like receptor 4 genes expression and cytokines concentration in human intestinal epithelial cells |
| topic | Bacteroides fragilis Gut Microbiota Membrane Vesicles Toll Like Receptors |
| url | https://celljournal.org/journal/article/abstract/5750 |
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