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VEGF and odontoblast-like cells: Stimulation by low frequency ultrasound
- Source :
- Archives of Oral Biology. 54:185-191
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- Objective Vascular endothelial growth factor (VEGF) has been implicated in the regulation of dental pulp and dentine repair. Therapeutic ultrasound was shown to be effective for fracture repair. We investigated whether low frequency ultrasound influences the production of VEGF by odontoblast-like cells. Moreover, we examined the direct effects of VEGF on odontoblast-like cell proliferation. Design MDPC-23, an established odontoblast-like cell line, was exposed to increasing intensities of 30 kHz ultrasound using an ultrasonic tip probe. Results After 24 h cell culture, WST-1 analysis of cell viability and number showed a dose-dependent decrease in the number of viable cells with increasing ultrasound power. However, the relative concentration of VEGF as analysed by ELISA and normalised to cell number was significantly increased in the culture supernatants indicating an ultrasound-induced stimulation of odontoblastic VEGF secretion. Analysis of VEGF gene expression by sqRT-PCR revealed the expression of the main VEGF isoforms in the MDPC-23 cells, i.e. VEGF 120 and VEGF 164 as well as to a minor extent VEGF 188 . Low power ultrasound increased gene expression of all VEGF isoforms. Addition of recombinant VEGF to the cell cultures significantly stimulated cell proliferation. Gene expression of the VEGF receptors Flt1/VEGFR1 and KDR/VEGFR2 was detected in the MDPC-23, suggesting the possibility that VEGF may act on the odontoblast-like cells in an autocrine manner. Conclusions Our results indicate that ultrasound promoted VEGF expression and production by odontoblast-like cells and that VEGF may have autocrine effects on these cells. It is proposed that ultrasound may influence odontoblast activity and dentine repair by modulating production of endogenous growth factors in the dentine-pulp complex.
- Subjects :
- Vascular Endothelial Growth Factor A
Ultrasonic Therapy
medicine.medical_treatment
Cell Line
Mice
chemistry.chemical_compound
stomatognathic system
medicine
Animals
Viability assay
Autocrine signalling
General Dentistry
Cell Proliferation
Regulation of gene expression
Odontoblasts
Therapeutic ultrasound
Reverse Transcriptase Polymerase Chain Reaction
Chemistry
Cell growth
Cell Biology
General Medicine
Anatomy
Recombinant Proteins
Vascular endothelial growth factor
Odontoblast
Gene Expression Regulation
Otorhinolaryngology
Cell culture
Cancer research
Subjects
Details
- ISSN :
- 00039969
- Volume :
- 54
- Database :
- OpenAIRE
- Journal :
- Archives of Oral Biology
- Accession number :
- edsair.doi.dedup.....1099462d1bda2a5b820ec226bce4c920