从兔模型中分离纯化滑液源性间充质干细胞的磁活化细胞分选策略
1Postgraduate institution,Guangzhou Medical University, 2Guangdong Provincial Research Center for Artificial Intelligence and Digital Orthopedic Technology, 3Shenzhen Key Laboratory of Tissue Engineering, Shenzhen Laboratory of Digital Orthopaedic Engineering,Shenzhen Second People’s Hospital (The First Hospital Affiliated to Shenzhen University), 4Department of Chemistry,Chinese University of Hong Kong, 5Shenzhen Kangning Hospital,Shenzhen Mental Health Center
Summary
本文提出了一种简单而经济的协议, 直接隔离和纯化新西兰白兔滑液间充质干细胞。
Abstract
间充质干细胞 (MSCs) 是细胞治疗的主要细胞来源。关节腔滑液中的 MSCs 可能用于软骨组织工程。滑膜液中的骨髓间充质干细胞被认为是促进关节再生的候选者, 其潜在的治疗效果已成为晚期的一个重要研究课题。从新西兰白兔的膝腔中的 SF 干细胞可以作为一种优化的转化模型来评估人体再生医学。通过 CD90-based 磁活化细胞分选 (mac) 技术, 该协议成功地从该兔模型中获得了兔 SF-mscs (rbSF), 并通过诱导它们分化为进一步充分展示了这些细胞的 MSC 表型。成骨细胞, 脂肪细胞和软骨。因此, 这种方法可以应用于细胞生物学研究和组织工程中, 使用简单的设备和程序。
Introduction
骨髓间充质干细胞被认为是再生医学的宝贵来源, 尤其是软骨损伤。骨髓间充质干细胞, 包括软骨细胞、成骨细胞、脂肪细胞、骨骼肌细胞和内脏基质干细胞, 由于其高扩张率和多谱系分化潜能1, 广泛扩大了干细胞移植的面积。MSCs 可从骨骼肌、滑膜、骨髓和脂肪组织中分离出2、3、4。研究结果还 confirmed 了在滑膜液中的 MSCs 的存在, 先前的调查已经确定了滑膜液源性 mscs (SF-mscs) 作为关节再生5、6的有望候选者。
然而, 人体标本的研究和前期实验受到许多伦理问题的影响。相反, 兔子一直是并且继续是最常用的动物种类表明, 骨髓间充质干细胞移植可以修复软骨损伤。近年来, 越来越多的研究人员研究了兔间充质干细胞 (rbMSCs)的体外和体内作用, 因为这些细胞在细胞生物学和组织生理学上与人的 MSCs 相似。同样, rbMSCs 能够附着在塑料表面, 显示纺锤体成纤维细胞形态, 如在人类 MSCs 中。此外, 家兔间充质样品简单易获得7。此外, 最关键的一点是, rbMSCs 明确的表面标记, 如 CD44, CD90, 和 CD105, 并认为多血统分化潜力保持, 这是符合标准的鉴定的 MSC 人口作为由国际社会为细胞疗法定义8,9。特别是, 滑膜液生发能够在 TGF-β1诱导下的非肥厚软骨, 从而使其适合表型关节软骨再生10,11的细胞源, 12。
然而, 与其他组织 (包括脐带、脂肪组织、外周血、骨髓) 的分离有很大的不同。目前, 采用流式细胞术和磁珠分选方法对 SF MSCs 进行纯化和分类是最常用的方法, 尽管流式细胞术法需要特定的环境和高成本的仪器13。
本文介绍了一种简便、微创的新西兰白兔滑液标本采集方法。在该过程中, rbSF-MSCs 在体外稳定扩张, 然后以 CD90 正磁珠为基础进行分离。最后, 该协议显示了如何从收获的细胞来源获得高纯度和生存能力的 MSCs。
在该协议中, 分离的 rbSF-MSCs 的特点是基于它们的形态学, 特定标记的表达, 和干细胞的干细胞。基于流式细胞术的免疫分型揭示了 CD44 和 CD105 的显著阳性表达, 而 CD45 和 CD34 的表达呈阴性。最后, 对 rbSF 骨髓间充质干细胞的体外测定表明了这些细胞的成骨、脂肪和软骨分化。
Protocol
所有动物实验都是按照区域伦理委员会的指导方针进行的, 所有动物程序都是由深圳市第二人民医院机构动物护理和使用委员会批准的。 1. 分离和培养 rbSF-MSCs 准备为动物做法 制备 skeletally 成熟的新西兰雌性白兔, 用于收集 rbSF-MSCs. 在麻醉和冲洗术手术前一天对兔子进行一次临床检查。注: 体格检查应包括体重 (2.0-2.5 公斤)、性别 (女性)、体温、…
Representative Results
rbSF-MSCs 的分离、纯化和培养:根据 MSC 表面标记 CD90 的表达式, 该协议使用 mac 隔离 rbSF MSCs。图 1显示了 rbSF-MSCs 的分离、纯化和表征以及体外培养协议的工艺流程图。 磁性活化细胞分选 (mac) 与 CD90 后的细胞形态学:首先, 对于 mac, immunolabel MSCs 与 CD90 磁珠。离心后, 并?…
Discussion
在滑膜液中 MSCs 的存在为细胞治疗提供了一种替代方法。以往的研究表明, 损伤部位在滑液中含有较高数量的间充质干细胞, 这可能与损伤后5期呈正相关。在滑膜液中的 MSCs 可能有利于组织, 以加强在伤害18,19的自发愈合。在文献中很少涉及 sf 间充质干细胞的临床应用, 主要是因为关节内的 sf-mscs 的机制仍未确定20。琼…
Offenlegungen
The authors have nothing to disclose.
Acknowledgements
这项研究得到了以下赠款的资助: 中国自然科学基金 (81572198 号;81772394号);深圳大学高等医学学科建设基金 (2016031638 号);中国广东省医学研究基金会 (no。A2016314);和深圳科技项目 (no。JCYJ20170306092215436;大声 笑JCYJ20170412150609690;大声 笑JCYJ20170413161800287;大声 笑SGLH20161209105517753;大声 笑JCYJ20160301111338144)。
Materials
| Reagents | |||
| MesenGro | StemRD | MGro-500 1703 | Warm in 37 °C water bath before use |
| MesenGro Supplement | StemRD | MGro-500 M1512 | Component of MSCs culture medium |
| DMEM basic | Gibco Inc. | C11995500BT | MSCs differentiation medium |
| Isotonic saline solution | Litai, China | 5217080305 | Cavity arthrocentesis procedure reagent |
| Phosphate-Buffered Saline (PBS) | HyClone Inc. | SH30256.01B | PBS, free of Ca2+/Mg2+ |
| Fetal Bovine Serum (FBS) | Gibco Inc. | 10099-141 | Component of MSCs culture medium |
| Povidone iodine solution | Guangdong, China | 150605 | Sterilization agent |
| 75% ethanol | Lircon, china | 170917 | Sterilization agent |
| 0.25% Trypsin/EDTA | Gibco Inc. | 25200-056 | Cell dissociation reagent |
| 1% Penicillin-Streptomycin | Gibco Inc. | 15140-122 | Component of MSCs medium |
| MACS Running Buffer | MiltenyiBiotec | 5160112089 | Containing phosphate-buffered saline (PBS), 0.5% bovine serum albumin(BSA), and 2 mMEDTA |
| CD90 antibody conjugated MicroBeads | MiltenyiBiotec | 5160801456 | For magnetic activated cell sorting |
| Sodium pyruvate | Sigma-Aldrich | P2256 | Component of MSCs chondrogenic differentiation |
| Dexamethasone | Sigma-Aldrich | D1756 | Component of MSCs osteogenic differentiation |
| ITS | BD | 354352 | 1%, Component of MSCs chondrogenic differentiation |
| L-proline | Sigma-Aldrich | P5607 | 0.35 mM, Component of MSCs chondrogenic differentiation |
| L-ascorbic acid-2-phosphate | Sigma-Aldrich | A8960 | 50 mM, Component of MSCs chondrogenic differentiation |
| 3-isobutyl-1-methylxanthine | Sigma-Aldrich | I5879 | 0.5 mM, Component of adipogenic differentiation |
| Indomethacin | Sigma-Aldrich | I7378 | 100 mM, Component of adipogenic differentiation |
| TGFβ1 | Peprotech | 100-21 | 10 ng/mL, Component of MSCs chondrogenic differentiation |
| α-glycerophsphate | Sigma-Aldrich | G6751 | Component of MSCs osteogenic differentiation |
| CD34 Polyclonal Antibody, FITC Conjugated | Bioss | bs-0646R-FITC | Hematopoietic stem cells marker |
| Mouse antirabbit CD44 | Bio-Rad | MCA806GA | Thy-1 membrane glycoprotein (MSCs marker) |
| CD45 (Monoclonal Antibody) | Bio-Rad | MCA808GA | Hematopoietic stem cells marker |
| CD105 antibody | Genetex | GTX11415 | MSCs marker |
| Isopropyl alcohol | Sigma-Aldrich | I9030 | Precipitates RNA extraction organic phases |
| Trichloromethane | Wenge, China | 61553 | Extract total RNA |
| Trizol | Invitrogen | 15596-018 | Isolate total RNA |
| SYBR green master mix | Takara Bio, Japan | RR420A | PCR test |
| cDNA synthesis kit | Takara Bio, Japan | RR047A | Reverse-transcribed to complementary DNA |
| Alizarin Red | Sigma-Aldrich | A5533 | Staining of calcium compounds |
| Toluidine Blue | Sigma-Aldrich | 89640 | Staining of cartilaginous tissue |
| Oil Red O solution | Sigma-Aldrich | O1391L | Lipid vacuole staining |
| Equipment | |||
| MiniMACS Separator | MiltenyiBiotec | 130-042-102 | For magnetic activated cell sorting |
| MultiStand | MiltenyiBiotec | 130-042-303 | For magnetic activated cell sorting |
| MS Columns | MiltenyiBiotec | 130-042-201 | For magnetic activated cell sorting |
| Cell Strainer | FALCON Inc. | 352340 | 40 μm nylon |
| Hemocytometer | ISOLAB Inc. | 075.03.001 | Cell counting |
| Falcon 100 mm dish | Corning | 353003 | Cell culture dish |
| Microcentrifuge tube | Axygen | MCT-150-C | RNA Extraction and PCR |
| Centrifuge Tubes | Sigma-Aldrich | 91050 | Gamma-sterilized |
| High-speed centrifuge | Eppendorf | 5804R | Centrifuge cells |
| Carbon dioxide cell incubator | Thermo scientific | 3111 | Cell culture |
| Real-Time PCR Instrument | Life Tech | QuantStudio | Real-Time quantitative polymerase chain reaction |
| Flow cytometer | BD Biosciences | 342975 | Cell analyzer |
| Pipettor | Eppendorf | O25456F | Transfer the liquid |
| Cloning cylinder | Sigma-Aldrich | C3983-50EA | Isolate and pick individual cell colonies |
| Sterile hypodermic syringe | Double-Dove, China | 131010 | Arthrocentesis procedure |
| Rabbit cage | Zhike, China | ZC-TGD | Restrain the rabbit |
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Diesen Artikel zitieren
Jia, Z., Liang, Y., Li, X., Xu, X., Xiong, J., Wang, D., Duan, L. Magnetic-Activated Cell Sorting Strategies to Isolate and Purify Synovial Fluid-Derived Mesenchymal Stem Cells from a Rabbit Model. J. Vis. Exp. (138), e57466, doi:10.3791/57466 (2018).