ArticleHua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology2022
Effect of inward rectifier potassium 2.1 channel on the osteogenic differentiation of human dental follicle cells and its mechanism.
Article in Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivesThis study aims to explore the effect of inward rectifier potassium (Kir) 2.1 channel on the osteogenic differentiation of human dental follicle cells (hDFCs) and its mechanism.
methodshDFCs were isolated and cultured, and their source was verified by flow cytometry. Osteogenic differentiation ability of hDFCs was evaluated by osteogenic induction. Reverse-transcription polymerase chain reaction (RT-PCR) was performed to detect the gene expression of Kir2.1 gene (KCNJ2) in hDFCs. Real-time quantitative PCR (RT-qPCR) was performed to detect the expression of the Kir2.1 gene (KCNJ2) in hDFCs before and after osteogenic induction. Patch clamp technique was conducted to record the membrane potential changes of hDFCs before and after osteogenic induction. Moreover, the effect on the osteogenic differentiation of hDFCs was confirmed by increasing the concentration of extracellular potassium ions (50 mmol·L
resultsRT-PCR results showed that hDFCs expressed the Kir2.1 channel gene (KCNJ2). The RT-qPCR results showed that the KCNJ2 gene expression in hDFCs was upregulated 7 days after osteogenic induction. The patch clamp results showed that the membrane potential of hDFCs hyperpolarized to (-47±5.2) mV from (-12±3.2) mV. Alizarin red and alkaline phosphatase staining results showed that increasing the concentration of the extracellular potassium or blocking the function of the Kir2.1 channel significantly inhibited the osteogenic mineralization ability of hDFCs. The membrane potential hyperpolarization increased the intracellular calcium concentration in hDFCs.
conclusionsMembrane potential hyperpolarization mediated by the Kir2.1 channel plays an important role in the osteogenic differentiation of hDFCs.
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