Abstract
Diabetes mellitus (DM) influence induces poor osseointegration. The osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) is a critical factor in successful dental implants. Certain microRNAs play important roles during bone development, and others are deregulated in diabetes. This study investigated the roles of miR-129–5p in the osteoblast differentiation regulation. Exosomes containing miR-129–5p inhibited the osteoblast differentiation and was found in the blood of DM rats. The BMSCs isolated from the jaw of rats were used to detect the miR-129–5p expression. Frizzled (FZD) proteins function as receptors for WNT ligands. The FZD4 was the target of miR-129–5p in dual luciferase assay and Western blot. The miR-129–5p inhibited osteoblast differentiation and decreased the osteoblast markers. The exosomes isolated from the blood of DM rats showed more miR-129–5p level. Results suggested that the exosomes containing miR-129–5p maybe regulators of BMSCs in jaw. The collected exosomes containing miR-129–5p showed the inhibition effect in osteoblast differentiation and decreased the expression osteoblastic markers by targeting FZD4/β-catenin signaling pathway. Therefore, the exosomes containing miR-129–5p in DM rats inhibits osteoblast differentiation by targeting FZD4/β-catenin pathway.
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