alexa Effects of lipopolysaccharide on newly established rat dental pulp-derived cell line with odontoblastic properties.
Medicine

Medicine

Advanced Techniques in Biology & Medicine

Author(s): Nomiyama K, Kitamura C, Tsujisawa T, Nagayoshi M, Morotomi T,

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Abstract To clarify mechanisms of pulp wound healing and regeneration, it is important to establish continuous odontoblast-lineage cell lines. In this study, we established the proliferating pulp progenitor cell lines from dental papilla cells of rat incisor. These cell lines showed high levels of alkaline phosphatase (ALP) activity, expression of Runx2 and dentin sialophosphoprotein (DSPP), and extracellular formation of mineralized nodules. By using the cell line with high expression level of DSPP and the prominent mineral deposition, we examined whether bacterial lipopolysaccharide (LPS) had effects on its odontoblastic properties and found that ALP activity, expression of DSPP and Runx2, and the formation of mineralized nodules were suppressed in LPS dose-dependent manner. These results indicate that our established pulp progenitor cell line exhibits odontoblastic properties, which were suppressed by LPS, suggesting that gram-negative bacterial infection might downregulate the odontoblast function. This article was published in J Endod and referenced in Advanced Techniques in Biology & Medicine

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