BMC Musculoskelet Disord:前交叉韧带损伤?新型人工韧带来重建

2019-09-03 不详 网络

前交叉韧带损伤的治疗通常使用聚对苯二甲酸乙二醇酯(PET)人造韧带进行重建。然而,目前可用的方法需要长的固定时间,因此需要开发替代方法以加速肌腱和骨骼之间的愈合过程。因此,我们开发并评估了一种利用硅酸盐取代锶(SrSiP)的新技术。制备纳米涂覆有SrSiP的PET膜。培养来自雄性大鼠股骨的骨髓间充质细胞(BMSC),并以1.0×104/cm2的密度接种到SrSiP包被和未包被的PET膜上,随后置于

前交叉韧带损伤的治疗通常使用聚对苯二甲酸乙二醇酯(PET)人造韧带进行重建。然而,目前可用的方法需要长的固定时间,因此需要开发替代方法以加速肌腱和骨骼之间的愈合过程。因此,我们开发并评估了一种利用硅酸盐取代锶(SrSiP)的新技术。

制备纳米涂覆有SrSiP的PET膜。培养来自雄性大鼠股骨的骨髓间充质细胞(BMSC),并以1.0×104/cm2的密度接种到SrSiP包被和未包被的PET膜上,随后置于成骨培养基中。在每种情况下比较分泌到培养基中的骨钙蛋白浓度。接下来,制备纳米涂覆有SrSiP的PET人造韧带。将BMSC以4.5×105/cm 2的密度接种到SrSiP包被的和未包被的人造韧带上,然后置于成骨培养基中。在培养的第8天,第10天,第12天和第14天测量培养基中的骨钙蛋白和钙浓度。此外,通过qPCR评估骨钙蛋白,碱性磷酸酶(ALP),骨形态发生蛋白-2(BMP2)和瘤相关转录因子2(Runx2)的mRNA表达。我们将SrSiP涂层和非涂层人工韧带移植到成熟的新西兰白兔的胫骨上。两个月后,我们处死兔子并进行组织学评估。

结果显示,对于SrSiP组,膜上介质中的分泌性骨钙素浓度明显高于未涂布组。在第14天,SrSiP组中人工韧带培养基中的分泌性骨钙素浓度也明显高于非涂层组。在第8天,第10天,第12天和第14天,SrSiP组中人工韧带上的钙浓度明显低于非涂层组。在qPCR中,SrSiP组中的OC,ALP,BMP2和Runx2 mRNA表达明显高于未包被组。在SrSiP组的人工韧带周围组织学上发现了新形成的骨。

总之,该研究结果表明,使用SrSiP的人造韧带显示出高成骨潜力,因此可以有效地用于未来的临床应用。

原始出处:

Egawa T, Inagaki Y, et al., Silicate-substituted strontium apatite nano coating improves osteogenesis around artificial ligament. BMC Musculoskelet Disord. 2019 Aug 31;20(1):396. doi: 10.1186/s12891-019-2777-8.

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    2019-11-08 cmsvly
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