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J Craniofac Surg:骨形态发生蛋白-9-刺激脂肪细胞衍生的间充质祖细胞可有效促进成骨

2019-03-22 不详 网络

由于可获得性和易于收获,脂肪组织是再生医学中祖细胞的有利来源,但尚未针对成骨分化进行优化。本研究旨在利用骨形态发生蛋白-9(BMP-9)转导的永生化小鼠脂肪细胞(iMAD)祖细胞在基于柠檬酸盐的相变聚(聚乙二醇柠檬酸盐-共-N-异丙基丙烯酰胺)(PPCN)-明胶支架中测试手术缺损模型中的颅骨愈合。使用表达BMP-9或绿色荧光蛋白对照的腺病毒转导间充质祖细胞iMAD细胞。 12只小鼠接受了颅骨切除术

由于可获得性和易于收获,脂肪组织是再生医学中祖细胞的有利来源,但尚未针对成骨分化进行优化。本研究旨在利用骨形态发生蛋白-9(BMP-9)转导的永生化小鼠脂肪细胞(iMAD)祖细胞在基于柠檬酸盐的相变聚(聚乙二醇柠檬酸盐-共-N-异丙基丙烯酰胺)(PPCN)-明胶支架中测试手术缺损模型中的颅骨愈合。

使用表达BMP-9或绿色荧光蛋白对照的腺病毒转导间充质祖细胞iMAD细胞。 12只小鼠接受了颅骨切除术以达到临界尺寸的颅骨缺损。将iMAD细胞与PPCN-明胶支架混合并注入缺陷中。每隔2周使用MicroCT成像,进行12周,以跟踪缺损愈合情况。对在12周最终成像后收获的颅骨切片进行组织学分析,以评估新形成的骨的质量和成熟度。

结果显示,BMP-9组和对照组的初始缺损大小相似(P = 0.21)。在每个时间点,BMP-9组显示出较小的缺陷尺寸,较高的百分比缺陷愈合,以及较大的百分比缺陷随时间变化。在12周结束时,BMP-9组显示平均缺损闭合率为27.39%,而对照组仅显示9.89%缺损闭合(P <0.05)。与对照相比,BMP-9转导的iMAD与PPCN-明胶支架组合促进体内骨生成并表现出显着更大的成骨作用。

总之,脂肪来源的iMADs是间充质干细胞的有前途的来源,用于再生医学,特别是骨骼工程的进一步研究,目的是潜在的颅面应用。

原始出处:

Lee CS, Bishop ES, et al., Bone Morphogenetic Protein-9-Stimulated Adipocyte-Derived Mesenchymal Progenitors Entrapped in a Thermoresponsive Nanocomposite Scaffold Facilitate Cranial Defect Repair. J Craniofac Surg. 2019 Mar 16. doi: 10.1097/SCS.0000000000005465.

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