Mechanical Strain Delivers Anti-apoptotic and Proliferative Signals to Gingival Fibroblasts

Physical forces play a critical role in the survival and proliferation of many cell types, including fibroblasts. Gingival fibroblasts are exposed to mechanical stress during mastication, orthodontic tooth movement, and wound healing following periodontal surgery. The aim of this study was to examin...

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Veröffentlicht in:Journal of dental research 2004-08, Vol.83 (8), p.596-601
Hauptverfasser: Danciu, T.E., Gagari, E., Adam, R.M., Damoulis, P.D., Freeman, M.R.
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container_issue 8
container_start_page 596
container_title Journal of dental research
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creator Danciu, T.E.
Gagari, E.
Adam, R.M.
Damoulis, P.D.
Freeman, M.R.
description Physical forces play a critical role in the survival and proliferation of many cell types, including fibroblasts. Gingival fibroblasts are exposed to mechanical stress during mastication, orthodontic tooth movement, and wound healing following periodontal surgery. The aim of this study was to examine the effect of mechanical strain on human gingival fibroblasts (hGF). Cells were subjected to short-term (up to 60 min) and long-term (up to 48 hrs) 20% average elongation at 0.1 Hz. We monitored survival signaling by evaluating the phosphorylation status and localization of Forkhead box (FoxO) family members, which are mediators of apoptosis. We also examined strain-induced proliferation by measuring the level of proliferating cell nuclear antigen (PCNA). We observed that cyclic strain caused the phosphorylation and retention in the cytoplasm of FoxO family members. Moreover, mechanical strain resulted in increased ERK kinase phosphorylation and PCNA expression. In conclusion, cyclic strain delivers anti-apoptotic and proliferative stimuli to hGF.
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Gingival fibroblasts are exposed to mechanical stress during mastication, orthodontic tooth movement, and wound healing following periodontal surgery. The aim of this study was to examine the effect of mechanical strain on human gingival fibroblasts (hGF). Cells were subjected to short-term (up to 60 min) and long-term (up to 48 hrs) 20% average elongation at 0.1 Hz. We monitored survival signaling by evaluating the phosphorylation status and localization of Forkhead box (FoxO) family members, which are mediators of apoptosis. We also examined strain-induced proliferation by measuring the level of proliferating cell nuclear antigen (PCNA). We observed that cyclic strain caused the phosphorylation and retention in the cytoplasm of FoxO family members. Moreover, mechanical strain resulted in increased ERK kinase phosphorylation and PCNA expression. 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subjects Apoptosis - physiology
Cell Division - physiology
Cell Size - physiology
Cells, Cultured
Dentistry
DNA-Binding Proteins - metabolism
Fibroblasts - metabolism
Forkhead Box Protein O1
Forkhead Transcription Factors
Gingiva - cytology
Gingiva - metabolism
Humans
Mastication
Mitogen-Activated Protein Kinases - metabolism
Proliferating Cell Nuclear Antigen - metabolism
Protein-Serine-Threonine Kinases - metabolism
Proto-Oncogene Proteins - metabolism
Proto-Oncogene Proteins c-akt
Signal Transduction - physiology
Stress, Mechanical
Time Factors
Transcription Factors - metabolism
Translocation, Genetic
title Mechanical Strain Delivers Anti-apoptotic and Proliferative Signals to Gingival Fibroblasts
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