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IL-36γ is a pivotal inflammatory player in periodontitis-associated bone loss
Periodontitis is a prevalent chronic inflammatory disease due to the host response (IL-1β, IL-6, TNF-α and IL-17A) to oral bacteria such as Porphyromonas gingivalis . The newer members of the IL-1 family, IL-36s (IL-36α/IL-36β/IL-36γ/IL-36Ra/IL-38) are known to be involved in host defense against P....
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Published in: | Scientific reports 2019-12, Vol.9 (1), p.19257-12, Article 19257 |
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Main Authors: | , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Periodontitis is a prevalent chronic inflammatory disease due to the host response (IL-1β, IL-6, TNF-α and IL-17A) to oral bacteria such as
Porphyromonas gingivalis
. The newer members of the IL-1 family, IL-36s (IL-36α/IL-36β/IL-36γ/IL-36Ra/IL-38) are known to be involved in host defense against
P. gingivalis
in oral epithelial cells (OECs) and are considered as key inflammatory mediators in chronic diseases. The aim of this study was to investigate the potential role of IL-36s in periodontitis. We showed here that
IL-36γ
mRNA gingival expression is higher in periodontitis patients, whereas
IL-36β
and
IL-36Ra
mRNA expression are lower compared to healthy controls. Interestingly, the elevated
IL-36γ
expression in patients is positively correlated with the
RANKL
/
OPG
ratio, an index of bone resorption.
In vitro, IL-36γ
expression was induced through TLR2 activation in primary OECs infected with
P. gingivalis
but not in gingival fibroblasts, the most widespread cell type in gingival connective tissue. In OECs, recombinant IL-36γ enhanced the expression of inflammatory cytokines (
IL-1β
,
IL-6, TNF-α
and
IL-36γ
), of
TLR2
and importantly, the
RANKL
/
OPG
ratio. These findings suggest that IL-36γ could be a pivotal inflammatory player in periodontitis by perpetuating gingival inflammation and its associated alveolar bone resorption and could be a relevant therapeutic target. |
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ISSN: | 2045-2322 2045-2322 |
DOI: | 10.1038/s41598-019-55595-9 |