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Expression of TLR4 in dental pulp cells. Immunohistochemistry for TLR4 gene expression analysis (A, C, E, G) using a non-specific IgG as control (B, D, F, H). TLR4 was observed in the dental pulp stem cells (DPSC), human dental pulp fibroblasts (HDPF), rat odontoblast-like cells (MDPC-23), and mouse macrophages (control).
