Suppr超能文献

人耳和鼻中扩增的软骨细胞在软骨形成能力方面的差异及其基因表达谱。

Differences in cartilage-forming capacity of expanded human chondrocytes from ear and nose and their gene expression profiles.

机构信息

Department of Otorhinolaryngology, Head and Neck surgery, Erasmus MC, University Medical Center Rotterdam, The Netherlands.

出版信息

Cell Transplant. 2011;20(6):925-40. doi: 10.3727/096368910X539119. Epub 2010 Nov 5.

Abstract

The aim of this study was to evaluate the potential of culture-expanded human auricular and nasoseptal chondrocytes as cell source for regeneration of stable cartilage and to analyze the differences in gene expression profile of expanded chondrocytes from these specific locations. Auricular chondrocytes in monolayer proliferated less and more slowly (two passages took 26.7 ± 2.1 days and were reached in 4.37 ± 0.30 population doublings) than nasoseptal chondrocytes (19.3 ± 2.5 days; 5.45 ± 0.20 population doublings). However, auricular chondrocytes produced larger pellets with more cartilage-like matrix than nasoseptal chondrocytes (2.2 ± 0.71 vs. 1.7 ± 0.13 mm in diameter after 35 days of culture). Although the matrix formed by auricular and nasoseptal chondrocytes contained collagen X, it did not mineralize in an in vitro model or after in vivo subcutaneous implantation. A DNA microarray study on expanded auricular and nasoseptal chondrocytes from the same donors revealed 1,090 differentially expressed genes. No difference was observed in the expression of known markers of chondrogenic capacity (e.g., collagen II, FGFR3, BMP2, and ALK1). The most striking differences were that the auricular chondrocytes had a higher expression of anabolic growth factors BMP5 and IGF1, while matrix-degrading enzymes MMP13 and ADAMTS5 were higher expressed in nasoseptal chondrocytes. This might offer a possible explanation for the observed higher matrix production by auricular chondrocytes. Moreover, chondrocytes isolated from auricular or nasoseptal cartilage had specific gene expression profiles even after expansion. These differently expressed genes were not restricted to known characterization of donor site subtype (e.g., elastic), but were also related to developmental processes.

摘要

本研究旨在评估培养扩增的人耳软骨和鼻中隔软骨细胞作为稳定软骨再生的细胞来源的潜力,并分析来自这些特定部位的扩增软骨细胞的基因表达谱差异。单层培养的耳软骨细胞增殖较少且较慢(两个传代需要 26.7 ± 2.1 天,达到 4.37 ± 0.30 个细胞倍增),而鼻中隔软骨细胞增殖较快(19.3 ± 2.5 天;5.45 ± 0.20 个细胞倍增)。然而,耳软骨细胞形成的软骨样基质较多,生成的细胞球较大(培养 35 天后直径分别为 2.2 ± 0.71 和 1.7 ± 0.13 毫米)。尽管耳软骨和鼻中隔软骨细胞形成的基质含有胶原 X,但在体外模型或皮下植入后均未矿化。对来自同一供体的扩增耳软骨和鼻中隔软骨细胞进行 DNA 微阵列研究显示,有 1090 个差异表达基因。未观察到已知软骨形成能力标志物(如胶原 II、FGFR3、BMP2 和 ALK1)的表达差异。最显著的差异是,耳软骨细胞中合成代谢生长因子 BMP5 和 IGF1 的表达较高,而基质降解酶 MMP13 和 ADAMTS5 在鼻中隔软骨细胞中的表达较高。这可能解释了观察到的耳软骨细胞更高的基质生成能力。此外,即使经过扩增,从耳软骨或鼻中隔软骨分离的软骨细胞也具有特定的基因表达谱。这些差异表达的基因不仅限于供体部位亚型的已知特征(如弹性),还与发育过程有关。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验