J Periodontal Res:牙周韧带内骨髓来源细胞通过基质细胞衍生因子/趋化因子受体4型生物轴募集

2017-07-24 MedSci MedSci原创

目的:牙周韧带(PDL)是位于牙槽骨和牙根表面牙骨质之间的非矿化结缔组织,在牙齿功能中起重要作用。 PDL储备有能分化为多种类型细胞的多能干细胞。然而,除了其起源之外,这些干细胞的来源尚不清楚。

目的:牙周韧带(PDL)是位于牙槽骨和牙根表面牙骨质之间的非矿化结缔组织,在牙齿功能中起重要作用。 PDL储备有能分化为多种类型细胞的多能干细胞。然而,除了其起源之外,这些干细胞的来源尚不清楚。

材料与方法:为了阐明PDL中骨髓(BM)来源干细胞的募集,将表达绿色荧光蛋白(GFP)的骨髓细胞移植到免疫缺陷大鼠的股骨BM中,并分析PDL中干细胞标记物在体内的分布和表达。为了评估BM来源干细胞对PDL的功能意义,进行了牙齿再植,并分析了基质细胞衍生因子(SDF)-1的表达,这是间充质干细胞增殖的关键趋化信号。为了证实BM来源细胞迁移到PDL的SDF-1依赖性,制备了PDL条件培养基(CM),并使用细胞迁移培养系统分析了BM来源细胞的迁移。

结果:细胞移植后4周,在PDL中检测到GFP阳性细胞,其中一些干细胞标志物(即CD29,SSEA4和aSMA)也呈阳性。牙齿再植后7天,PDL中GFP和SDF-1阳性细胞显着增加。同时,外周血中SDF-1的浓度和成纤维细胞的集落形成单位数也增加。 BM来源细胞的迁移在PDL-CM中增加,并被CXC趋化因子受体4型(CXCR4)--SDF-1受体抑制剂抑制。

结论:这些结果表明,PDL中的干细胞及其后代不仅来源于其发育,还可以通过血液从BM提供。此外,这种BM来源细胞至少部分被SDF-1 / CXCR4轴调节。

原始出处:

M. Kaku, M. Kitami, J. M. Rosales Rocabado, et al.Recruitment of bone marrow-derived cells to the periodontal ligament via the stromal cell-derived factor-1/C-X-C chemokine receptor type 4 axis. Journal of periodontal research. 2017 August. doi: 10.1111/jre.12433

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    2018-01-21 feather89
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