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首页> 外文期刊>Acta biomaterialia >Maturation of human embryonic stem cell-derived cardiomyocytes (hESC-CMs) in 3D collagen matrix: Effects of niche cell supplementation and mechanical stimulation
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Maturation of human embryonic stem cell-derived cardiomyocytes (hESC-CMs) in 3D collagen matrix: Effects of niche cell supplementation and mechanical stimulation

机译:3D胶原基质中的人胚胎干细胞衍生心肌细胞(HESC-CMS)的成熟:利基细胞补充和机械刺激的影响

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摘要

Cardiomyocytes derived from human embryonic stem cells (hESC-CMs) are regarded as a promising source for regenerative medicine, drug testing and disease modeling. Nevertheless, cardiomyocytes are immature in terms of their contractile structure, metabolism and electrophysiological properties. Here, we fabricate cardiac muscle strips by encapsulating hESC-CMs in collagen-based biomaterials. Supplementation of niche cells at 3% to the number of hESC-CMs enhance the maturation of the hESC-CMs in 3D tissue matrix. The benefits of adding mesenchymal stem cells (MSCs) are comparable to that of adding fibroblasts. These two cell types demonstrate similar effects in promoting the compaction and cell spreading, as well as expression of maturation markers at both gene and protein levels. Mechanical loading, particularly cyclic stretch, produces engineered cardiac tissues with higher maturity in terms of twitch force, elastic modulus, sarcomere length and molecular signature, when comparing to static stretch or non-stretched controls. The current study demonstrates that the application of niche cells and mechanical stretch both stimulate the maturation of hESC-CMs in 3D architecture. Our results therefore suggest that this 3D model can be used for in vitro cardiac maturation study.
机译:源自人胚胎干细胞(HESC-CMS)的心肌细胞被认为是再生医学,药物检测和疾病建模的有希望的源。然而,在其收缩结构,代谢和电生理学性质方面,心肌细胞在不成熟。在这里,我们通过在基于胶原基生物材料中包封HESC-CMS来制造心肌剥离。在3%的3%上补充Niche细胞的Niche细胞增强3D组织基质中HESC-CMS的成熟。添加间充质干细胞(MSCs)的益处与添加成纤维细胞的益处相当。这两种细胞类型表现出类似的效果在促进压实和细胞扩散以及两种基因和蛋白质水平的成熟标志物的表达。当与静态拉伸或非拉伸对照相比,机械负载,特别是循环拉伸,在抽搐力,弹性模量,SARCAMERE长度和分子签名方面产生具有更高成熟度的工程心脏组织。目前的研究表明,利基细胞和机械拉伸的应用均刺激3D架构中HESC-CM的成熟。因此,我们的结果表明,该3D模型可用于体外心脏成熟研究。

著录项

  • 来源
    《Acta biomaterialia》 |2017年第2017期|共14页
  • 作者单位

    Univ Hong Kong Dept Mech Engn Tissue Engn Lab Pokfulam Rd Hong Kong Hong Kong Peoples R China;

    Univ Hong Kong LKS Fac Med Stem Cell &

    Regenerat Med Consortium Pokfulam Rd Hong Kong Hong;

    Univ Hong Kong Dept Mech Engn Tissue Engn Lab Pokfulam Rd Hong Kong Hong Kong Peoples R China;

    Univ Hong Kong Dept Mech Engn Tissue Engn Lab Pokfulam Rd Hong Kong Hong Kong Peoples R China;

    Univ Hong Kong Dept Mech Engn Tissue Engn Lab Pokfulam Rd Hong Kong Hong Kong Peoples R China;

    Univ Hong Kong LKS Fac Med Stem Cell &

    Regenerat Med Consortium Pokfulam Rd Hong Kong Hong;

    Univ Hong Kong Dept Mech Engn Tissue Engn Lab Pokfulam Rd Hong Kong Hong Kong Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 普通生物学;
  • 关键词

    Heart tissue engineering; Maturation; Human embryonic stem cell; Mechanical loading; Mesenchymal cell;

    机译:心脏组织工程;成熟;人胚胎干细胞;机械载荷;间充质细胞;

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