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Article

TEGDMA (Triethylene Glycol Dimethacrylate) Induces Both Caspase-Dependent and Caspase-Independent Apoptotic Pathways in Pulp Cells

1
Department of Oral and Maxillofacial Surgery, University of Pécs, Medical School, 5. Dischka St., 7621 Pécs, Hungary
2
Department of Medical Biology and Central Electron Microscope Laboratory, University of Pécs Medical School, 12. Szigeti St., 7624 Pécs, Hungary
3
Szentágothai Research Centre, University of Pécs, Ifjúság Street 20, 7624 Pécs, Hungary
4
Department of Restorative Dentistry, University of Pécs, Medical School, 5. Dischka St., 7621 Pécs, Hungary
*
Author to whom correspondence should be addressed.
Academic Editor: Andrea Scribante
Polymers 2021, 13(5), 699; https://doi.org/10.3390/polym13050699
Received: 31 January 2021 / Revised: 18 February 2021 / Accepted: 20 February 2021 / Published: 25 February 2021
(This article belongs to the Special Issue Polymers for Oral and Dental Health)
Monomers leached from resin-based composites (RBCs) may reach intrapulpal concentrations of the millimolar (mM) range, which could contribute to inflammation. The aim of this investigation was to assess the cytotoxicity of triethylene glycol dimethacrylate (TEGDMA) monomers on pulp cells as well as to identify molecular mechanisms leading to apoptosis. Pulp cells were harvested from molars extracted for orthodontic reasons and cultured through an explant method. To assess cytotoxicity, cells underwent a 5-day exposure to 0.75, 1.5, and 3 mM TEGDMA and were subject to cell counting and WST-1 staining. Based on the findings, cells were subsequently exposed to 0.1, 0.2, 0.75, 1.5, and 3 mM TEGDMA for 24 h to uncover the details of apoptosis. Changes in the production or cleavage of the apoptosis-specific proteins caspase-8, caspase-9, caspase-3, caspase-12, and Apoptosis-Inducing Factor (AIF) were measured by Western blot. The 5-day study showed concentration- and time-dependent cytotoxicity. Significant cell death was detected after 24 h with TEGDMA concentrations of 1.5 and 3 mM. One-day exposure to TEGDMA led to the activation of caspase-8, -9, -3, and -12 and an increased AIF production. Results suggest that relevant concentrations of TEGDMA monomers, leached from RBCs, induce apoptosis in pulp cells through both caspase-dependent as well as caspase-independent mechanisms. Endoplasmic reticulum stress and the activation of caspase-independent apoptotic pathways may be further mechanisms by which monomers induce apoptosis in pulp cells. View Full-Text
Keywords: TEGDMA; dental resin monomers; composite; apoptosis; caspase; composites TEGDMA; dental resin monomers; composite; apoptosis; caspase; composites
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MDPI and ACS Style

Lovász, B.V.; Berta, G.; Lempel, E.; Sétáló, G., Jr.; Vecsernyés, M.; Szalma, J. TEGDMA (Triethylene Glycol Dimethacrylate) Induces Both Caspase-Dependent and Caspase-Independent Apoptotic Pathways in Pulp Cells. Polymers 2021, 13, 699. https://doi.org/10.3390/polym13050699

AMA Style

Lovász BV, Berta G, Lempel E, Sétáló G Jr., Vecsernyés M, Szalma J. TEGDMA (Triethylene Glycol Dimethacrylate) Induces Both Caspase-Dependent and Caspase-Independent Apoptotic Pathways in Pulp Cells. Polymers. 2021; 13(5):699. https://doi.org/10.3390/polym13050699

Chicago/Turabian Style

Lovász, Bálint Viktor, Gergely Berta, Edina Lempel, György Sétáló Jr., Mónika Vecsernyés, and József Szalma. 2021. "TEGDMA (Triethylene Glycol Dimethacrylate) Induces Both Caspase-Dependent and Caspase-Independent Apoptotic Pathways in Pulp Cells" Polymers 13, no. 5: 699. https://doi.org/10.3390/polym13050699

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