Bone-conditioned medium contributes to initiation and progression of osteogenesis by exhibiting synergistic TGF-β1/BMP-2 activity.
10.1038/s41368-018-0021-2
- Author:
Maria B ASPARUHOVA
1
;
Jordi CABALLÉ-SERRANO
2
;
Daniel BUSER
3
;
Vivianne CHAPPUIS
3
Author Information
1. Laboratory of Oral Cell Biology, School of Dental Medicine, University of Bern, Bern, Switzerland. mariya.asparuhova@zmk.unibe.ch.
2. Laboratory of Oral Cell Biology, School of Dental Medicine, University of Bern, Bern, Switzerland.
3. Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland.
- Publication Type:Journal Article
- MeSH:
Biomarkers;
metabolism;
Bone Morphogenetic Protein 2;
metabolism;
Cell Adhesion;
Cell Differentiation;
Cell Movement;
Cell Proliferation;
Culture Media, Conditioned;
pharmacology;
Guided Tissue Regeneration, Periodontal;
methods;
Humans;
Mesenchymal Stem Cells;
metabolism;
Osteoblasts;
metabolism;
Osteogenesis;
drug effects;
Transforming Growth Factor beta1;
metabolism
- From:
International Journal of Oral Science
2018;10(2):20-20
- CountryChina
- Language:English
-
Abstract:
Guided bone regeneration (GBR) often utilizes a combination of autologous bone grafts, deproteinized bovine bone mineral (DBBM), and collagen membranes. DBBM and collagen membranes pre-coated with bone-conditioned medium (BCM) extracted from locally harvested autologous bone chips have shown great regenerative potential in GBR. However, the underlying molecular mechanism remains largely unknown. Here, we investigated the composition of BCM and its activity on the osteogenic potential of mesenchymal stromal cells. We detected a fast and significant (P < 0.001) release of transforming growth factor-β1 (TGF-β1) from autologous bone within 10 min versus a delayed bone morphogenetic protein-2 (BMP-2) release from 40 min onwards. BCMs harvested within short time periods (10, 20, or 40 min), corresponding to the time of a typical surgical procedure, significantly increased the proliferative activity and collagen matrix production of BCM-treated cells. Long-term (1, 3, or 6 days)-extracted BCMs promoted the later stages of osteoblast differentiation and maturation. Short-term-extracted BCMs, in which TGF-β1 but no BMP-2 was detected, reduced the expression of the late differentiation marker osteocalcin. However, when both growth factors were present simultaneously in the BCM, no inhibitory effects on osteoblast differentiation were observed, suggesting a synergistic TGF-β1/BMP-2 activity. Consequently, in cells that were co-stimulated with recombinant TGF-β1 and BMP-2, we showed a significant stimulatory and dose-dependent effect of TGF-β1 on BMP-2-induced osteoblast differentiation due to prolonged BMP signaling and reduced expression of the BMP-2 antagonist noggin. Altogether, our data provide new insights into the molecular mechanisms underlying the favorable outcome from GBR procedures using BCM, derived from autologous bone grafts.
