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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Clonogenic multipotent stem cells in human adipose tissue differentiate into functional smooth muscle cells
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Clonogenic multipotent stem cells in human adipose tissue differentiate into functional smooth muscle cells

机译:人脂肪组织中的克隆性多能干细胞分化为功能性平滑肌细胞

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摘要

Smooth muscle is a major component of human tissues and is essential for the normal function of a multitude of organs including the intestine, urinary tract and the vascular system. The use of stem cells for cell-based tissue engineering and regeneration strategies represents a promising alternative for smooth muscle repair. For such strategies to succeed, a reliable source of smooth muscle precursor cells must be identified. Adipose tissue provides an abundant source of multipotent cells. In this study, the capacity of processed lipoaspirate (PLA) and adipose-derived stem cells to differentiate into phenotypic and functional smooth muscle cells was evaluated. To induce differentiation, PLA cells were cultured in smooth muscle differentiation medium. Smooth muscle differentiation of PLA cells induced genetic expression of all smooth muscle markers and further confirmed by increased protein expression of smooth muscle cell-specific a actin (ASMA), calponin, caldesmon, SM22, myosin heavy chain (MHC), and smoothelin. Clonal studies of adipose derived multipotent cells demonstrated differentiation of these cells into smooth muscle cells in addition to trilineage differentiation capacity. Importantly, smooth muscle-differentiated cells, but not their precursors, exhibit the functional ability to contract and relax in direct response to pharmacologic agents. In conclusion, adipose-derived cells have the potential to differentiate into functional smooth muscle cells and, thus, adipose tissue can be a useful source of cells for treatment of injured tissues where smooth muscle plays an important role.
机译:平滑肌是人体组织的主要组成部分,对于包括肠道,泌尿道和血管系统在内的众多器官的正常功能至关重要。干细胞在基于细胞的组织工程和再生策略中的应用代表了平滑肌修复的有希望的替代方法。为了使这种策略成功,必须确定平滑肌前体细胞的可靠来源。脂肪组织提供了丰富的多能细胞来源。在这项研究中,评估了加工的脂肪抽吸物(PLA)和脂肪来源的干细胞分化为表型和功能性平滑肌细胞的能力。为了诱导分化,将PLA细胞培养在平滑肌分化培养基中。 PLA细胞的平滑肌分化诱导了所有平滑肌标志物的基因表达,并进一步由平滑肌细胞特异的肌动蛋白(ASMA),钙蛋白,钙化蛋白,SM22,肌球蛋白重链(MHC)和平滑蛋白的蛋白质表达所证实。脂肪来源的多能细胞的克隆研究表明,除了三系分化能力外,这些细胞还可以分化为平滑肌细胞。重要的是,平滑肌分化的细胞,而不是它们的前体,在对药理剂的直接响应中表现出收缩和松弛的功能能力。总之,脂肪来源的细胞具有分化为功能性平滑肌细胞的潜力,因此,脂肪组织可以成为治疗受损组织的有用细胞来源,在受损组织中,平滑肌起着重要的作用。

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