Inhibitory effect of the TSG-6 on the BMP-4/Smad signaling pathway and odonto/osteogenic differentiation of dental pulp stem cells - 18/06/20
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Graphical abstract |
Highlights |
• | TSG-6 inhibits the BMP-4/Smad signaling pathway of dental pulp stem cells. |
• | TNF-α inhibits the mineralizition ability of dental pulp stem cells via TSG-6. |
• | TSG-6-RNAi dental pulp stem cells had better mineralizition ability in inflammation. |
• | TSG-6 could inhibit the mineralizition ability of DPSCs at the level of animal. |
Abstract |
This study aimed to observe the molecular mechanism underlying the effect of tumor necrosis factor–inducible protein 6 (TSG-6) on the bone morphogenetic protein-4 (BMP-4)/drosophila mothers against decapentaplegic protein(Smad) signaling pathway and mineralization of dental pulp stem cells (DPSCs) in inflammatory environment. Normal and TSG-6 gene–modified DPSCs were cultured in a mineralization-inducing fluid containing 0 or 50 ng/mL TNF-α separately. The real-time polymerase chain reaction was used to measure the expression of TSG-6 and odonto/osteogenic differentiation makers at the mRNA level. Western blot analysis and cellular immunofluorescence were used to observe the odonto/osteogenic differentiation of DPSCs and the variation of BMP-4/Smad signaling pathway at the protein level. Moreover, normal and modified DPSCs combined with hydrogel were used for subcutaneous implantation in nude mice. The levels of odonto/osteogenic markers and BMP-4/Smad-related proteins were lower in Ad-TSG-6 DPSCs than in normal DPSCs after mineralization induction, and were higher in TSG-6-RNAi DPSCs than in normal DPSCs after culturing with mineralization-inducing fluid containing 50 ng/mL TNF-α. The subcutaneous transplantation of normal and modified DPSCs combined with hydrogel in nude mice demonstrated that normal DPSCs were formed in the tissue containing collagen. The tissue formed by Ad-TSG-6 DPSCs was highly variable, and the cells were very dense. We can know that TNF-α regulates the expression of TSG-6, thereby inhibiting the BMP-4/Smad signaling pathway and the odonto/osteogenic differentiation ability of DPSCs.
El texto completo de este artículo está disponible en PDF.Keywords : BMP/Smad, dental pulp stem cells, pulpitis, tumor necrosis factor-inducible protein 6
Esquema
Vol 128
Artículo 110266- août 2020 Regresar al númeroBienvenido a EM-consulte, la referencia de los profesionales de la salud.
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