HEMA but not TEGDMA induces autophagy in human gingival fibroblasts
| Autor: | Maria Carla Mazzotti, Mirella Falconi, Giovanna Orsini, Viviana Salvatore, Stefano Focaroli, Monica Mattioli-Belmonte, Gabriella Teti, Alessandra Ruggeri |
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| Přispěvatelé: | Teti, Gabriella, Orsini, Giovanna, Salvatore, Viviana, Focaroli, Stefano, Mazzotti, Maria C., Ruggeri, Alessandra, Mattioli-Belmonte, Monica, Falconi, Mirella |
| Rok vydání: | 2015 |
| Předmět: |
Cell signaling
Programmed cell death autophagy Physiology Cellular homeostasis medicine.disease_cause lcsh:Physiology Physiology (medical) medicine Caspase Original Research chemistry.chemical_classification Reactive oxygen species biology lcsh:QP1-981 Dental resin monomer Chemistry Autophagy apoptosis Apoptosi Cell biology Apoptosis dental resin monomers Immunology biology.protein human gingival fibroblasts adaptive cell response Oxidative stress |
| Zdroj: | Frontiers in Physiology Frontiers in Physiology, Vol 6 (2015) |
| ISSN: | 1664-042X |
| Popis: | Polymerized resin-based materials are successfully used in restorative dentistry. Despite their growing popularity, one drawback is the release of monomers from the polymerized matrix due to an incomplete polymerization or degradation processes. Released monomers are responsible for several adverse effects in the surrounding biological tissues, inducing high levels of oxidative stress. Reactive oxygen species are important signaling molecules that regulate many signal-trasduction pathways and play critical roles in cell survival, death, and immune defenses. Reactive oxygen species were recently shown to activate autophagy as a mechanism of cell survival and cell death. Although the toxicity induced by dental resin monomers is widely studied, the cellular mechanisms underlying these phenomena are still unknown. The aim of the study was to investigate the behavior of human gingival cells exposed to 2-hydroxy-ethyl methacrylate (HEMA) and triethylene glycol dimethacrylate (TEGDMA) to better elucidate the mechanisms of cell survival and cell death induced by resin monomers. Primary culture of human gingival cells were exposed to 3mmol/L of HEMA or 3mmol/L of TEGDMA for 24 h, 48h, and 72 h. Morphological investigations were performed by transmission electron microscopy to analyze the ultrastructure of cells exposed to the monomers. The expression of protein markers for apoptosis (caspase – 3 and PARP) and autophagy (beclin – 1 and LC3B I/II) were analyzed by western blot to investigate the influence of dental resin monomers on mechanisms underlying cell death. Results showed that HEMA treatment clearly induced autophagy followed by apoptosis while the lack of any sign of autophagy activation is observed in HGFs exposed to TEGDMA. These data indicate that cells respond to monomer-induced stress by the differential induction of adaptive mechanisms to maintain cellular homeostasis. |
| Databáze: | OpenAIRE |
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