A1 Refereed original research article in a scientific journal

Quantitative Evaluation of NFE2L2/NRF2 and Cytokine Response Induced by Porphyromonas Gingivalis Lipopolysaccharide and Nicotine in a Titanium-Oral Mucosa Model




AuthorsKasnak, Gökhan; Gürsoy, Mervi; Könönen, Eija; Firatli, Erhan; Syrjänen, Stina; Gürsoy, Ulvi Kahraman

PublisherTurkiye Klinikleri

Publication year2024

JournalTürkiye klinikleri diş hekimliği bilimleri

Journal name in sourceTurkiye Klinikleri Journal of Dental Sciences

Volume30

Issue4

First page 648

Last page657

eISSN2146-8966

DOIhttps://doi.org/10.5336/dentalsci.2024-103018

Web address http://doi.org/10.5336/dentalsci.2024-103018

Self-archived copy’s web addresshttps://research.utu.fi/converis/portal/detail/Publication/458956782

Additional informationLehden englanninkielinen nimi: Turkiye Klinikleri Journal of Dental Sciences


Abstract

Objective: Titanium can alter peri-implant mucosa cytokine response to microbiological and chemical stresses. This work used organotypic titanium-oral mucosa model to evaluate oxidant resistance and cytokine response to Porphyromonas gingivalis lipopolysaccharide (Pg LPS) and nicotine. Material and Methods: Seeding gingival keratinocytes on collagen gels with fibroblasts and adding titanium grade (Ti-Gr) 4, Ti-Gr 5, or hydroxyapatite discs developed an organotypic titanium-oral mucosa model. Pg LPS (1 l/mL), nicotine (1.54 mM), or both were given to the model. The Luminex® xMAPTM technology measured interleukin (IL)-1β, IL-1Ra, IL-8, monocyte chemoattractant protein-1 (MCP-1), and vascular endothelial growth factor levels in culture media. Cultured tissues were paraffin-blocked and immunohistochemistry was used to measure nuclear factor erythroid 2 like 2 (NFE2L2/NRF2), 8-hydroxyguanosine (8-OHdG), and Parkinsonism-associated deglycase (PARK7/DJ-1). Statistical analysis included one-way analysis of varianceand Tukey's HSD. Results: Nicotine and Pg LPS+nicotine increased IL-1β and IL-1Ra secretions in Ti-Gr 4, Ti-Gr 5, and hydroxyapatite groups (p<0.01). Pg LPS alone (p<0.01) and in conjunction with nicotine (p=0.021) enhanced MCP-1 production, but nicotine alone lowered it (p=0.024). IL-8 concentrations rose in all test groups (p<0.01). All groups treated with nicotine, LPS, or both showed increased 8-Hydroxydeoxyguanosine and NFE2L2/NRF2 immunostainings (p<0.01), whereas PARK7/DJ-1 expression remained unchanged. When assessed without inducers, Ti-Gr 4, Ti-Gr 5, or hydroxyapatite groups showed no significant variations in cytokine secretion patterns, NFEL2/NRF2, 8-OHdG, or PARK7/DJ-1 immunostainings (p>0.05). Conclusion: Titanium did not affect cytokines or oxidant resistance molecules in our organotypic model without inducers. However, Pg LPS, nicotine, and their mixtures enhance cytokines and oxidative resistance molecules.


Downloadable publication

This is an electronic reprint of the original article.
This reprint may differ from the original in pagination and typographic detail. Please cite the original version.





Last updated on 2025-27-01 at 20:03