Suppression of αvβ6 Integrin Expression by Polymicrobial Oral Biofilms in Gingival Epithelial Cells
Abstract Periodontal diseases manifest by the formation of deep pockets between the gingiva and teeth where multispecies bacterial biofilms flourish, causing inflammation and bone loss. Epithelial cell receptor αvβ6 integrin that regulates inflammation by activating the anti-inflammatory cytokine tr...
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Nature Portfolio
2017
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oai:doaj.org-article:7122099892e944fca08d2c0010fd7dae2021-12-02T12:31:52ZSuppression of αvβ6 Integrin Expression by Polymicrobial Oral Biofilms in Gingival Epithelial Cells10.1038/s41598-017-03619-72045-2322https://doaj.org/article/7122099892e944fca08d2c0010fd7dae2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03619-7https://doaj.org/toc/2045-2322Abstract Periodontal diseases manifest by the formation of deep pockets between the gingiva and teeth where multispecies bacterial biofilms flourish, causing inflammation and bone loss. Epithelial cell receptor αvβ6 integrin that regulates inflammation by activating the anti-inflammatory cytokine transforming growth factor-β1, is highly expressed in healthy junctional epithelium that connects the gingiva to the tooth enamel. However, its expression is attenuated in human periodontal disease. Moreover, Itgb6 −/− mice display increased periodontal inflammation compared to wild-type mice. We hypothesized that bacterial biofilms present in the periodontal pockets suppress αvβ6 integrin levels in periodontal disease and that this change aggravates inflammation. To this end, we generated three-week-old multi-species oral biofilms in vitro and treated cultured gingival epithelial cells (GECs) with their extracts. The biofilm extracts caused suppression of β6 integrin expression and upregulation of pro-inflammatory cytokines, including interleukin-1β and -6. Furthermore, GECs with β6 integrin siRNA knockdown showed increased interleukin-1β expression, indicating that αvβ6 integrin-deficiency is associated with pro-inflammatory cytokine responsiveness. FSL-1, a synthetic bacterial lipopeptide, also suppressed β6 integrin expression in GECs. Therefore, biofilm components, including lipopeptides, may downregulate αvβ6 integrin expression in the pocket epithelium and thus promote epithelial cell-driven pro-inflammatory response in periodontal disease.Jiarui BiLeeni KoivistoAihui PangMing LiGuoqiao JiangSaljae AuroraZhejun WangGethin R. OwenJiayin DaiYa ShenDaniel GrenierMarkus HaapasaloLari HäkkinenHannu LarjavaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017) |
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Medicine R Science Q |
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Medicine R Science Q Jiarui Bi Leeni Koivisto Aihui Pang Ming Li Guoqiao Jiang Saljae Aurora Zhejun Wang Gethin R. Owen Jiayin Dai Ya Shen Daniel Grenier Markus Haapasalo Lari Häkkinen Hannu Larjava Suppression of αvβ6 Integrin Expression by Polymicrobial Oral Biofilms in Gingival Epithelial Cells |
| description |
Abstract Periodontal diseases manifest by the formation of deep pockets between the gingiva and teeth where multispecies bacterial biofilms flourish, causing inflammation and bone loss. Epithelial cell receptor αvβ6 integrin that regulates inflammation by activating the anti-inflammatory cytokine transforming growth factor-β1, is highly expressed in healthy junctional epithelium that connects the gingiva to the tooth enamel. However, its expression is attenuated in human periodontal disease. Moreover, Itgb6 −/− mice display increased periodontal inflammation compared to wild-type mice. We hypothesized that bacterial biofilms present in the periodontal pockets suppress αvβ6 integrin levels in periodontal disease and that this change aggravates inflammation. To this end, we generated three-week-old multi-species oral biofilms in vitro and treated cultured gingival epithelial cells (GECs) with their extracts. The biofilm extracts caused suppression of β6 integrin expression and upregulation of pro-inflammatory cytokines, including interleukin-1β and -6. Furthermore, GECs with β6 integrin siRNA knockdown showed increased interleukin-1β expression, indicating that αvβ6 integrin-deficiency is associated with pro-inflammatory cytokine responsiveness. FSL-1, a synthetic bacterial lipopeptide, also suppressed β6 integrin expression in GECs. Therefore, biofilm components, including lipopeptides, may downregulate αvβ6 integrin expression in the pocket epithelium and thus promote epithelial cell-driven pro-inflammatory response in periodontal disease. |
| format |
article |
| author |
Jiarui Bi Leeni Koivisto Aihui Pang Ming Li Guoqiao Jiang Saljae Aurora Zhejun Wang Gethin R. Owen Jiayin Dai Ya Shen Daniel Grenier Markus Haapasalo Lari Häkkinen Hannu Larjava |
| author_facet |
Jiarui Bi Leeni Koivisto Aihui Pang Ming Li Guoqiao Jiang Saljae Aurora Zhejun Wang Gethin R. Owen Jiayin Dai Ya Shen Daniel Grenier Markus Haapasalo Lari Häkkinen Hannu Larjava |
| author_sort |
Jiarui Bi |
| title |
Suppression of αvβ6 Integrin Expression by Polymicrobial Oral Biofilms in Gingival Epithelial Cells |
| title_short |
Suppression of αvβ6 Integrin Expression by Polymicrobial Oral Biofilms in Gingival Epithelial Cells |
| title_full |
Suppression of αvβ6 Integrin Expression by Polymicrobial Oral Biofilms in Gingival Epithelial Cells |
| title_fullStr |
Suppression of αvβ6 Integrin Expression by Polymicrobial Oral Biofilms in Gingival Epithelial Cells |
| title_full_unstemmed |
Suppression of αvβ6 Integrin Expression by Polymicrobial Oral Biofilms in Gingival Epithelial Cells |
| title_sort |
suppression of αvβ6 integrin expression by polymicrobial oral biofilms in gingival epithelial cells |
| publisher |
Nature Portfolio |
| publishDate |
2017 |
| url |
https://doaj.org/article/7122099892e944fca08d2c0010fd7dae |
| work_keys_str_mv |
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| _version_ |
1718394221546700800 |