牙周纤维
间充质干细胞
化学
牙周膜干细胞
牙龈卟啉单胞菌
炎症
医学
牙槽
细胞生物学
干细胞
免疫学
牙周炎
骨形态发生蛋白2
碱性磷酸酶
体外
牙科
生物
生物化学
酶
作者
Liu Wang,Xiangfen Li,Yao Song,Lan Zhang,Ling Ye,Xuedong Zhou,Dongzhe Song,Dingming Huang
摘要
Periodontitis could lead to periodontal destruction such as the loss of alveolar bone. The issue that how to achieve the regeneration of alveolar bone and periodontal tissues under the inflammatory environment needs to be solved urgently. Bone morphogenetic protein 9 (BMP9) is one of the most potent osteoinductive BMPs and induces osteogenic differentiation of mesenchymal stem cells. The aim of this study is to explore the possible effect of BMP9 on the osteogenic differentiation of inflammatory periodontal ligament stem cells (PDLSCs).Human PDLSCs were cultured in osteoinductive medium with 1 μg/mL lipopolysaccharide Porphyromonas gingivitis (LPS-PG). Adenoviral vector expressing system was used to overexpress target genes. In vitro expression of osteogenic markers was assessed by quantitative reverse transcription polymerase chain reaction, Western blotting, alkaline phosphatase assay, and alizarin red staining. Subcutaneous implantation nude mice models were used to evaluate the effects of BMP9 on PDLSCs in vivo. Microcomputed tomography, hematoxylin & eosin staining, and trichrome staining were performed to assess ectopic bone formation.In the LPS-PG induced inflammatory environment, BMP9 promoted osteogenic differentiation of PDLSCs, but upregulated the expression of inflammatory markers (P > 0.05); NEL-like protein 1 (NELL1) downregulated the expression of inflammation genes in PDLSCs induced by BMP9, while augmenting BMP9-induced osteogenesis of the cells both in vitro and in vivo. In the above process, the MAPK/p38/ERK signaling pathway was triggered by NELL1.The combination use of BMP9 and NELL1 might have the potential to promote the regeneration of alveolar bone in periodontitis.
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