Extracellular calcium increases fibroblast growth factor 2 gene expression via extracellular signal-regulated kinase 1/2 and protein kinase A signaling in mouse dental papilla cells
J. appl. oral sci
; 26: e20170231, 2018. graf
Article
in En
| LILACS, BBO
| ID: biblio-893679
Responsible library:
BR1.1
ABSTRACT
Abstract We previously reported that elevated extracellular calcium (Ca2+) levels increase bone morphogenetic protein 2 expression in human dental pulp (hDP) cells. However, it is unknown whether extracellular Ca2+ affects the expression of other growth factors such as fibroblast growth factor 2 (FGF2). Objective:
The present study aimed to examine the effect of extracellular Ca2+ on FGF2 gene expression in hDP and immortalized mouse dental papilla (mDP) cells. Materials andMethods:
Cells were stimulated with 10 mM CaCl2 in the presence or absence of cell signaling inhibitors. FGF2 gene expression was assessed using real-time polymerase chain reaction. The phosphorylation status of signaling molecules was examined by Western blotting.Results:
Extracellular Ca2+ increased FGF2 gene expression in mDP and hDP cells. Gene expression of the calcium-sensing receptor and G protein-coupled receptor family C group 6 member A, both of which are extracellular Ca2+ sensors, was not detected. Ca2+-mediated Fgf2 expression was reduced by pretreatment with the protein kinase A (PKA) inhibitor H-89 or extracellular signal-regulated kinase (ERK) 1/2 inhibitor PD98059 but not by pretreatment with the protein kinase C inhibitor GF-109203X or p38 inhibitor SB203580. Extracellular Ca2+ increased PKA activity and ERK1/2 phosphorylation. Ca2+-induced PKA activity decreased by pretreatment with PD98059.Conclusions:
These findings indicate that elevated extracellular Ca2+ levels led to increased Fgf2 expression through ERK1/2 and PKA in mDP cells and that this mechanism may be useful for designing regenerative therapies for dentin.Key words
Full text:
1
Index:
LILACS
Main subject:
Gene Expression
/
Calcium
/
Fibroblast Growth Factor 2
/
Cyclic AMP-Dependent Protein Kinases
/
Mitogen-Activated Protein Kinase 1
/
Dental Papilla
/
Mitogen-Activated Protein Kinase 3
Type of study:
Evaluation_studies
Limits:
Animals
Language:
En
Journal:
J. appl. oral sci
Journal subject:
ODONTOLOGIA
Year:
2018
Type:
Article