诱导子宫内膜间充质干细胞分化为适合筋膜修复的组织形成细胞。

Induction of endometrial mesenchymal stem cells into tissue-forming cells suitable for fascial repair.

机构信息

CSIRO Manufacturing Flagship, Bayview Avenue, Clayton, Victoria 3169, Australia.

MIMR-PHI Institute, 27-31 Wright Street, Clayton, Victoria 3168, Australia.

出版信息

Acta Biomater. 2014 Dec;10(12):5012-5020. doi: 10.1016/j.actbio.2014.08.031. Epub 2014 Sep 4.

Abstract

Pelvic organ prolapse is a major hidden burden affecting almost one in four women. It is treated by reconstructive surgery, often augmented with synthetic mesh. To overcome the growing concerns of using current synthetic meshes coupled with the high risk of reoperation, a tissue engineering strategy has been developed, adopting a novel source of mesenchymal stem cells. These cells are derived from the highly regenerative endometrial lining of the uterus (eMSCs) and will be delivered in vivo using a new gelatin-coated polyamide scaffold. In this study, gelatin properties were optimized by altering the gelatin concentration and extent of crosslinking to produce the desired gelation and degradation rate in culture. Following cell seeding of uncoated polyamide (PA) and gelatin-coated meshes (PA+G), the growth rate of eMSCs on the PA+G scaffolds was more than that on the PA alone, without compromising cell shape. eMSCs cultured on the PA+G scaffold retained their phenotype, as demonstrated by W5C5/SUSD2 (eMSC-specific marker) immunocytochemistry. Additionally, eMSCs were induced to differentiate into smooth muscle cells (SMC), as shown by immunofluorescence for smooth muscle protein 22 and smooth muscle myosin heavy chain. eMSCs also differentiated into fibroblast-like cells when treated with connective tissue growth factor with enhanced detection of Tenascin-C and collagen type I as well as new tissue formation, as seen by Masson's trichrome. In summary, it was demonstrated that the PA+G scaffold is an appropriate platform for eMSC delivery, proliferation and differentiation into SMC and fibroblasts, with good biocompatibility and the capacity to regenerate neo-tissue.

摘要

盆腔器官脱垂是一种严重的隐性负担,几乎影响到每四名女性中的一人。它通过重建手术治疗,通常辅以合成网片。为了克服使用当前合成网片的日益增加的担忧以及再次手术的高风险,已经开发了一种组织工程策略,采用了一种新型的间充质干细胞来源。这些细胞源自高度再生的子宫内膜衬里(eMSCs),并将使用新型明胶包被的聚酰胺支架在体内递送。在这项研究中,通过改变明胶浓度和交联程度来优化明胶特性,以在培养中产生所需的胶凝和降解速率。在未包被的聚酰胺(PA)和明胶包被的网格(PA+G)上接种细胞后,eMSCs 在 PA+G 支架上的生长速度比单独在 PA 上的生长速度快,而不会影响细胞形状。eMSCs 在 PA+G 支架上培养时保留了其表型,如 W5C5/SUSD2(eMSC 特异性标志物)免疫细胞化学所示。此外,通过平滑肌蛋白 22 和平滑肌肌球蛋白重链的免疫荧光染色,eMSCs 被诱导分化为平滑肌细胞。当用结缔组织生长因子处理时,eMSCs 也分化为成纤维细胞样细胞,通过 Masson 三色染色可见 Tenascin-C 和 I 型胶原的增强检测以及新组织形成。总之,结果表明 PA+G 支架是 eMSC 递送、增殖和分化为平滑肌细胞和成纤维细胞的合适平台,具有良好的生物相容性和再生新组织的能力。

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