Stem Cell Res Ther:浓缩生长因子在牙髓再生中的潜在应用

2019-05-25 不详 网络

已知浓缩生长因子(CGF)作为天然生物材料含有血小板,细胞因子和生长因子以促进愈合过程,但在再生牙髓病学中获得的信息很少。本研究旨在探究CGF对体外暴露于脂多糖(LPS)的人牙髓细胞(hDPSCs)增殖,迁移和分化的影响及其在体内未成熟牙髓再生中的潜在作用。通过冷冻干燥法提取CGF,分离并鉴定hDPSC。通过细胞计数试剂盒-8评估具有不同浓度的CGF和LPS的hDPSC的增殖潜力。通过Transw

已知浓缩生长因子(CGF)作为天然生物材料含有血小板,细胞因子和生长因子以促进愈合过程,但在再生牙髓病学中获得的信息很少。本研究旨在探究CGF对体外暴露于脂多糖(LPS)的人牙髓细胞(hDPSCs)增殖,迁移和分化的影响及其在体内未成熟牙髓再生中的潜在作用。

通过冷冻干燥法提取CGF,分离并鉴定hDPSC。通过细胞计数试剂盒-8评估具有不同浓度的CGF和LPS的hDPSC的增殖潜力。通过Transwell测定分析迁移能力,通过使用ALP染色测量碱性磷酸酶(ALP)活性来确定牙齿/成骨细胞分化,并且通过使用茜素红S染色来评估矿化程度。通过定量聚合酶链反应(qPCR)测定DMP-1,DSPP,OPN,Runx2和OCN的mRNA表达水平。体内实验中个,CGF用作比格犬中未成熟单根牙的根管充填剂。然后对牙齿进行射线照相,提取,固定,去矿化,并在8周时进行组织学分析。通过苏木精-伊红(HE)和Masson三色技术评价新形成的牙本质-牙髓复合体和根尖孔的发育。通过血管内皮生长因子(VEGF)和巢蛋白的免疫组织化学染色分析软组织。

体外实验结果显示,培养的细胞表现出间充质干细胞的特征。LPS处理明显增加hDPSCs中TNF-α,IL-1β,IL-6和IL-8的表达,CGF抑制LPS刺激的hDPSCs中IL-8的mRNA表达。从第3天到第7天,LPS刺激的hDPSC中CGF组的增殖值明显高于对照组(P <0.05)。此外,在有或没有LPS处理的情况下,CGF组的迁移细胞数在24小时时大于对照组。从第4天到第7天,两组的ALP活性逐渐增加.LPS刺激的CGF显著增强hDPSCs在第21天和第28天矿化结节和牙齿发生相关基因DMP-1和DSPP,成骨相关基因OPN,Runx2和OCN的表达。体内实验显示,在CGF处理组中,X光片,HE和Masson三色染色的结果显示比格犬中未成熟牙齿的持续发育的牙齿(即,软组织向内生长到根管内,增厚的内根 牙本质壁和闭合的顶点),类似于阳性对照组的正常牙齿发育。免疫组织化学染色显示VEGF和Nestin均在再生的纸浆样组织中适度表达,这表明血管化和神经支配。

综上所述,该研究结果表明,CGF对体外暴露于LPS的hDPSCs的增殖,迁移和分化具有积极作用,并且还可以促进体内比格犬中未成熟牙齿的牙本质-牙髓复合体的再生。因此,CGF可能是再生牙髓病学中一种很有前景的替代生物材料。

原始出处:

Xu F, Qiao L, et al., The potential application of concentrated growth factor in pulp regeneration: an in vitro and in vivo study. Stem Cell Res Ther. 2019 May 20;10(1):134. doi: 10.1186/s13287-019-1247-4.

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    2019-10-02 jxrzshh
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    2019-11-08 维他命
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