Smith & Nephew Plc., Columbia, MD 21046, USA.
Int J Mol Sci. 2021 Jul 1;22(13):7151. doi: 10.3390/ijms22137151.
The placental tissue, due to its angiogenic, anti-inflammatory, antioxidative, antimicrobial, and anti-fibrotic properties, has become a compelling source towards a solution for several indications in regenerative medicine. However, methods to enhance and capture the therapeutic properties with formulations that can further the applications of viable placental tissue have not been explored. In this study, we investigated the regenerative effects of a hypoxia primed flowable placental formulation (FPF), composed of amnion/chorion and umbilical tissue, in two in vivo injury models. Laser Doppler data from rodent ischemia hindlimbs treated with FPF revealed significant tissue perfusion improvements compared to control ischemic hindlimbs. To further corroborate FPF's effects, we used a rodent ischemic bipedicle skin flap wound model. FPF treatment significantly increased the rate of wound closure and the quality of wound healing. FPF-treated wounds displayed reduced inflammation and an increase in angiogenesis. Furthermore, quantitative PCR and next-generation sequencing analysis confirmed these changes in the FPF-treated group at both the gene and transcriptional level. The observed modulation in miRNAs was associated with angiogenesis, regulation of inflammatory microenvironment, cell migration and apoptosis, reactive oxygen species generation, and restoring epithelial barrier function, all processes involved in impaired tissue healing. Taken together, these data validate the tissue regenerative properties of the flowable placental formulation configuration tested.
胎盘组织因其具有血管生成、抗炎、抗氧化、抗菌和抗纤维化特性,已成为再生医学中多种适应症解决方案的有力来源。然而,尚未探索增强胎盘组织治疗特性并将其纳入可进一步应用于活胎盘组织配方的方法。在这项研究中,我们研究了由羊膜/绒毛膜和脐带组织组成的低氧预激活可流动胎盘制剂(FPF)在两种体内损伤模型中的再生作用。用 FPF 治疗的啮齿动物缺血后肢的激光多普勒数据显示,与对照缺血后肢相比,组织灌注有显著改善。为了进一步证实 FPF 的作用,我们使用了啮齿动物缺血双足皮瓣创面模型。FPF 治疗显著增加了创面闭合的速度和愈合质量。FPF 治疗的创面显示炎症减少,血管生成增加。此外,定量 PCR 和下一代测序分析证实了 FPF 治疗组在基因和转录水平上的这些变化。观察到的 miRNA 调节与血管生成、炎症微环境调节、细胞迁移和凋亡、活性氧生成以及恢复上皮屏障功能有关,所有这些过程都涉及受损组织愈合。总之,这些数据验证了所测试的可流动胎盘制剂配方的组织再生特性。