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人诱导多能干细胞向软骨细胞分化过程中糖鞘脂糖链和软骨标志物的改变。

Alterations of Glycosphingolipid Glycans and Chondrogenic Markers during Differentiation of Human Induced Pluripotent Stem Cells into Chondrocytes.

机构信息

Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, Hokkaido 060-8638, Japan.

Department of Advanced Clinical Glycobiology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 21, Nishi 11, Kita-ku, Sapporo, Hokkaido 001-0021, Japan.

出版信息

Biomolecules. 2020 Dec 1;10(12):1622. doi: 10.3390/biom10121622.

Abstract

Due to the limited intrinsic healing potential of cartilage, injury to this tissue may lead to osteoarthritis. Human induced pluripotent stem cells (iPSCs), which can be differentiated into chondrocytes, are a promising source of cells for cartilage regenerative therapy. Currently, however, the methods for evaluating chondrogenic differentiation of iPSCs are very limited; the main techniques are based on the detection of chondrogenic genes and histological analysis of the extracellular matrix. The cell surface is coated with glycocalyx, a layer of glycoconjugates including glycosphingolipids (GSLs) and glycoproteins. The glycans in glycoconjugates play important roles in biological events, and their expression and structure vary widely depending on cell types and conditions. In this study, we performed a quantitative GSL-glycan analysis of human iPSCs, iPSC-derived mesenchymal stem cell like cells (iPS-MSC like cells), iPS-MSC-derived chondrocytes (iPS-MSC-CDs), bone marrow-derived mesenchymal stem cells (BMSCs), and BMSC-derived chondrocytes (BMSC-CDs) using glycoblotting technology. We found that GSL-glycan profiles differed among cell types, and that the GSL-glycome underwent a characteristic alteration during the process of chondrogenic differentiation. Furthermore, we analyzed the GSL-glycome of normal human cartilage and found that it was quite similar to that of iPS-MSC-CDs. This is the first study to evaluate GSL-glycan structures on human iPS-derived cartilaginous particles under micromass culture conditions and those of normal human cartilage. Our results indicate that GSL-glycome analysis is useful for evaluating target cell differentiation and can thus support safe regenerative medicine.

摘要

由于软骨的内在修复潜力有限,因此该组织的损伤可能导致骨关节炎。人诱导多能干细胞(iPSCs)可分化为软骨细胞,是软骨再生治疗的有前途的细胞来源。然而,目前评估 iPSC 软骨分化的方法非常有限;主要技术基于对软骨基因的检测和细胞外基质的组织学分析。细胞表面覆盖着糖萼,糖萼是一层糖缀合物,包括糖脂(GSL)和糖蛋白。糖缀合物中的聚糖在生物事件中发挥着重要作用,其表达和结构因细胞类型和条件而异。在这项研究中,我们使用糖印迹技术对人 iPSC、iPSC 衍生的间充质干细胞样细胞(iPS-MSC 样细胞)、iPSC-MSC 衍生的软骨细胞(iPS-MSC-CDs)、骨髓来源的间充质干细胞(BMSCs)和 BMSC 衍生的软骨细胞(BMSC-CDs)进行了定量 GSL-聚糖分析。我们发现细胞类型之间的 GSL-聚糖谱不同,并且在软骨分化过程中 GSL-聚糖组经历了特征性改变。此外,我们分析了正常人类软骨的 GSL-聚糖组,发现它与 iPS-MSC-CDs 非常相似。这是第一项在微团培养条件下评估人 iPS 衍生的软骨颗粒上的 GSL-聚糖结构以及正常人类软骨的 GSL-聚糖组的研究。我们的结果表明,GSL-聚糖组分析可用于评估靶细胞分化,从而支持安全的再生医学。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7e48/7760376/c8b1f6a0c9ae/biomolecules-10-01622-g001.jpg

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