首页> 外文期刊>Artificial Organs >Three-dimensional culture of human nucleus pulposus cells in fibrin clot: comparisons on cellular proliferation and matrix synthesis with cells in alginate.
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Three-dimensional culture of human nucleus pulposus cells in fibrin clot: comparisons on cellular proliferation and matrix synthesis with cells in alginate.

机译:纤维蛋白凝块中人髓核细胞的三维培养:藻酸盐中细胞增殖和基质合成的比较。

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摘要

Regeneration of nucleus pulposus (NP) tissue may stop or reverse early intervertebral disk (IVD) degeneration. Cellular proliferation and matrix synthesis can be promoted by incorporation of cells and bioscaffolds. However, insertion of preshaped solid bioscaffolds may damage remaining IVD integrity. Fibrin clots can be introduced in a minimally invasive manner with polymerization in desired three-dimensional shape and retention of cells. In this study, we investigated the cellular proliferation and matrix synthesis of human NP cells in the fibrin clots in vitro. Monolayer-expanded cells were embedded in fibrin clot or alginate and were cultivated in vitro for 2 weeks. Increased DNA content and decreased expression of apoptosis stimulating fragment (Fas)-associated death-domain protein in fibrin scaffolds suggested higher cellular proliferation and reduced apoptosis. Superior proteoglycan synthesis was found in fibrin scaffolds. As expression of collagens I and X increased and SOX9 expression decreased, fibrin scaffolds tended to promote fibrotic transformation and inhibit chondrogenesis. Adjustments of fibrin preparations are needed to make it more suitable for IVD regeneration.
机译:髓核(NP)组织的再生可能会停止或逆转早期的椎间盘(IVD)退化。可以通过掺入细胞和生物支架来促进细胞增殖和基质合成。但是,插入预成型的固体生物支架可能会损坏剩余的IVD完整性。纤维蛋白凝块可以以微创的方式引入,并以所需的三维形状和细胞滞留性进行聚合。在这项研究中,我们调查了人NP细胞在纤维蛋白凝块中的细胞增殖和基质合成。将单层扩增的细胞包埋在血纤蛋白凝块或藻酸盐中,并在体外培养2周。纤维蛋白支架中的DNA含量增加和凋亡刺激性片段(Fas)相关的死亡域蛋白表达降低,表明细胞增殖更高,凋亡减少。在纤维蛋白支架中发现了卓越的蛋白聚糖合成。随着胶原蛋白I和X的表达增加而SOX9表达减少,纤维蛋白支架倾向于促进纤维化转化并抑制软骨形成。需要调整血纤蛋白制剂,使其更适合IVD再生。

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