Impact of FGF1 on human periodontal ligament fibroblast growth, osteogenic differentiation and inflammatory reaction in vitro.
J Orofac Orthop
; 83(Suppl 1): 42-55, 2022 Oct.
Article
in En
| MEDLINE
| ID: mdl-34874457
ABSTRACT
PURPOSE:
To investigate in vitro the impact of fibroblast growth factor 1 (FGF1) in comparison to ascorbic acid (AscA) on human periodontal ligament fibroblast (HPdLF) growth, their osteogenic differentiation, and modulation of their inflammatory reaction to mechanical stress.METHODS:
The influence of different concentrations of FGF1 (12.5-200â¯ng/mL) on growth and proliferation of HPdLF cells was analyzed over 20 days by counting cell numbers and the percentage of Ki67-positive cells. Quantitative expression analysis of genes encoding the osteogenic markers alkaline phosphatase (ALPL), Runt-related transcription factor 2 (RUNX2), osteocalcin (OCN), and osteopontin (OSP), as well as the fibroblast markers vimentin (VIM) and fibroblast-specific protein 1 (FSP1), was performed after 2 and 20 days of cultivation. Metabolic activity was determined by MTT assay. For comparison with AscA, 50â¯ng/mL FGF1 was used for stimulation for 2 and 20 days. Cell number, percentage of Ki67-positive cells, and expression of osteoblast- and fibroblast-specific genes were examined. Alkaline phosphatase activity was visualized by NBT/BCIP and calcium deposits were stained with alizarin red. Cytokine (IL6, IL8, COX2/PGE2) expression and secretion were analyzed by qPCR and ELISA in 6â¯h mechanically compressed HPdLF cultured for 2 days with FGF1 or ascorbic acid.RESULTS:
Higher concentrations of FGF1 promoted cell proliferation upon short-term stimulation, whereas prolonged treatment induced the expression of osteogenic markers even with low concentrations. AscA promotes cell growth more markedly than FGF1 in short-term cultures, whereas FGF1 induced osteogenic cell fate more strongly in long-term culture. Both factors induced an increased inflammatory response of HPdLF to mechanical compression.CONCLUSION:
Our data suggest that FGF1 promotes an osteogenic phenotype of HPdLF and limits inflammatory response to mechanical forces compared to AscA.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Periodontal Ligament
/
Core Binding Factor Alpha 1 Subunit
Limits:
Humans
Language:
En
Journal:
J Orofac Orthop
Journal subject:
ODONTOLOGIA
/
ORTODONTIA
Year:
2022
Document type:
Article
Affiliation country:
Germany