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Astragaloside IV attenuates inflammatory injury and promotes odontoblastic differentiation in lipopolysaccharide‐stimulated MDPC‐23 cells and rat pulpitis
Author(s) -
Ding Qun,
Gao Jinyu,
Zheng Jing,
Wang An,
Jing Shuanrang
Publication year - 2019
Publication title -
journal of oral pathology and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 83
eISSN - 1600-0714
pISSN - 0904-2512
DOI - 10.1111/jop.12926
Subject(s) - chemistry , mapk/erk pathway , rankl , viability assay , downregulation and upregulation , microbiology and biotechnology , odontoblast , dentin sialophosphoprotein , signal transduction , medicine , endocrinology , alkaline phosphatase , activator (genetics) , cell , receptor , biology , biochemistry , pulp (tooth) , pathology , gene , enzyme
Background Astragaloside IV (AS‐IV), a natural herbal compound from Astragalus membranaceus , has inhibitory effects on receptor activator of nuclear factor‐κB ligand (RANKL)‐induced osteoclastogenesis, and RANKL signal helps to regulate odontoblast differentiation. However, whether and how AS‐IV affects odontoblastic differentiation remains unclear. Methods Lipopolysaccharide (LPS)‐stimulated MDPC‐23 cells and rat pulpitis were treated with AS‐IV, cell viability, and LDH leakage was analyzed by CCK‐8 assay and LDH Leakage assay. The production of TNF‐α and IL‐6 was determined by ELISA and qRT‐PCR assay. The expression of alkaline phosphatase (ALP) was detected using an ALP assay kit, and the expression of dentin sialophos‐phoprotein (DSPP), dentin matrix protein‐1 (DMP1), basic fibroblast growth factor (FGF2), and phosphorylated extracellular signal‐regulated kinase (p‐ERK) was determined by western blot. Results AS‐IV dose dependently increased in cell viability and decreased the overproduction of TNF‐α and IL‐6 in LPS‐stimulated MDPC‐23 cells. AS‐IV also counteracted LPS‐induced downregulation of ALP, DSPP, and DMP1 in MDPC‐23 cells. Furthermore, AS‐IV significantly decreased the expression of FGF2 and p‐ERK in LPS‐stimulated MDPC‐23 cells. More important, the addition of FGF2 partly neutralized AS‐IV‐mediated inhibition of FGF2/ERK signaling, abolished AS‐IV‐induced reduction of TNF‐α and IL‐6, and counteracted AS‐IV‐induced upregulation of DSPP and DMP‐1 in these cells. Meanwhile, AS‐IV inhibited the excessive production of TNF‐α and IL‐6, suppressed the downregulation of DSPP and DMP1, and disturbed the up‐regulation of FGF2 and p‐ERK in the pulp tissues of rat pulpitis model. Conclusions AS‐IV exerted anti‐inflammatory and pro‐differentiation effects in LPS‐stimulated MDPC‐23 cells and rat pulpitis via inhibiting the FGF2/ERK signaling pathway.