Document Detail

Antioxidants counteract nicotine and promote migration via RacGTP in oral fibroblast cells.
MedLine Citation:
PMID:  20636139     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Smoking is associated with an increased risk of oral health and dental problems. The aim of this study is to address the hypothesis that nicotine impairs wound healing by increasing reactive oxygen species and inhibiting cell migration, and antioxidants (AOs) may counteract nicotine effects.
METHODS: Primary human gingival fibroblasts (HGFs) and human periodontal ligament (HPDL) fibroblasts were grown to confluence, pretreated with 6 mM nicotine for 2 hours, and treated with AOs in the presence of nicotine. The pure AO compounds ferulic acid (F), phloretin (P), tetrahydrocurcuminoid Cockroft Gault (T), and resveratrol (R) were tested in single, double, or triple combinations (10(-5) M). The migratory behavior at a scratch-wound edge was recorded every 15 minutes for 10 hours by using live-cell imaging. The active form of the Rho-associated protein (Rac) and guanosine triphosphate (GTP) (RacGTP) was immunolabeled and analyzed using confocal microscopy.
RESULTS: Combinations of double and triple AOs had a greater effect than single AOs on migration rates and Rac activation. The triple combinations PFR and RFT clearly and unambiguously counteracted the effects of nicotine and significantly increased migration rates in HGF and HPDL fibroblast.
CONCLUSIONS: Treatment with AO combinations clearly counteracted the effects of nicotine by restoring and increasing cell-migration rates. We found the combination of PFR was the most effective in HGFs, whereas, RFT was the most effective combination in HPDL fibroblast. These results clearly demonstrate that PF, RFT, and PFR counteract the negative effects of nicotine on cultured oral fibroblasts via the RacGTP signal-transduction pathway.
Symone M San Miguel; Lynne A Opperman; Edward P Allen; Jan Zielinski; Kathy K H Svoboda
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-07-17
Journal Detail:
Title:  Journal of periodontology     Volume:  81     ISSN:  1943-3670     ISO Abbreviation:  J. Periodontol.     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-11-02     Completed Date:  2011-02-24     Revised Date:  2013-06-03    
Medline Journal Info:
Nlm Unique ID:  8000345     Medline TA:  J Periodontol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1675-90     Citation Subset:  D; IM    
Department of Biomedical Sciences, Baylor College of Dentistry, Dallas, TX 75246, USA.
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MeSH Terms
Antioxidants / pharmacology*
Cell Movement / drug effects
Cell Survival / drug effects
Cells, Cultured
Coumaric Acids / pharmacology
Curcumin / analogs & derivatives,  pharmacology
Enzyme Inhibitors / pharmacology
Fibroblasts / drug effects*
Free Radical Scavengers / pharmacology
Gingiva / cytology,  drug effects*
Nicotine / antagonists & inhibitors*
Periodontal Ligament / cytology,  drug effects*
Phenols / pharmacology
Phloretin / pharmacology
Reactive Oxygen Species / antagonists & inhibitors
Ribonucleotide Reductases / antagonists & inhibitors
Signal Transduction / drug effects
Stilbenes / pharmacology
Time Factors
Wound Healing / drug effects
rac GTP-Binding Proteins / drug effects*
Reg. No./Substance:
0/Antioxidants; 0/Coumaric Acids; 0/Enzyme Inhibitors; 0/Free Radical Scavengers; 0/Phenols; 0/Reactive Oxygen Species; 0/Stilbenes; 00U0645U03/tetrahydrocurcumin; 458-37-7/Curcumin; 54-11-5/Nicotine; 60-82-2/Phloretin; AVM951ZWST/ferulic acid; EC 1.17.4.-/Ribonucleotide Reductases; EC GTP-Binding Proteins; Q369O8926L/resveratrol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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