中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (15): 2333-2338.doi: 10.12307/2023.387

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

骨髓炎状态下成骨诱导大鼠骨髓间充质干细胞转录组的测序分析

文虹杰1,陈  仲1,杨华刚1,徐永清2   

  1. 1云南大学附属医院骨科,云南省第二人民医院骨科,云南省昆明市   650021;2中国人民解放军联勤保障部队第920医院骨科,云南省昆明市   650021
  • 收稿日期:2022-04-27 接受日期:2022-07-14 出版日期:2023-05-28 发布日期:2022-10-17
  • 通讯作者: 徐永清,博士,主任医师,中国人民解放军联勤保障部队第920医院骨科,云南省昆明市 650021
  • 作者简介:文虹杰,男,1984 年生,湖南省永州市人,汉族,2021年昆明医科大学毕业,博士,主治医师,主要从事骨创伤临床与基础研究。
  • 基金资助:
    云南省基础研究计划昆医联合专项-面上项目(202201AY070001-274),项目负责人:文虹杰;云南省教育厅科学研究基金项目(2022J0016),项目负责人:文虹杰;国家自然科学基金面上项目(82072392),项目负责人:徐永清

Transcriptome sequencing analysis of osteogenic rat bone marrow mesenchymal stem cells induced by osteomyelitis

Wen Hongjie1, Chen Zhong1, Yang Huagang1, Xu Yongqing2   

  1. 1Department of Orthopedic and Trauma Surgery, Affiliated Hospital of Yunnan University, Second People’s Hospital of Yunnan Province, Kunming 650021, Yunnan Province, China; 2Department of Orthopedic Surgery, 920 Hospital of Joint Logistics Support Force of Chinese PLA, Kunming 650021, Yunnan Province, China
  • Received:2022-04-27 Accepted:2022-07-14 Online:2023-05-28 Published:2022-10-17
  • Contact: Xu Yongqing, MD, Chief physician, Department of Orthopedic Surgery, 920 Hospital of Joint Logistics Support Force of Chinese PLA, Kunming 650021, Yunnan Province, China
  • About author:Wen Hongjie, MD, Attending physician, Department of Orthopedic and Trauma Surgery, Affiliated Hospital of Yunnan University, Second People’s Hospital of Yunnan Province, Kunming 650021, Yunnan Province, China
  • Supported by:
    Kunming Medical Joint Special Project of Basic Research Program of Yunnan Province, No. 202201AY070001-274 (to WHJ); Scientific Research Foundation of Yunnan Education Department, No. 2022J0016 (to WHJ); National Natural Science Foundation of China (General Program), No. 82072392 (to XYQ)

摘要:

文题释义:
葡萄球菌A蛋白:是存在于葡萄球菌细胞壁的一种表面蛋白。它可与人类和多种哺乳动物IgG的Fc段结合,具有抗吞噬、促细胞分裂、引起超敏反应、损伤血小板等多种生物学活性,是葡萄球菌的毒力因子之一。
转录组测序:是通过各种测序平台快速全面地获得某一物种特定细胞或组织在某一状态下的几乎所有的转录本及基因序列,可以用于研究基因表达量、基因功能、结构、可变剪接和新转录本预测等。目前,转录组测序已经被广泛应用于基础研究、临床诊断和药物研发等领域。

背景:近来发现骨髓炎环境会显著抑制骨髓间充质干细胞的成骨分化能力,进而对骨形成和骨代谢造成影响,但其具体的作用机制尚不十分清楚。
目的:通过对葡萄球菌A蛋白作用下诱导成骨分化的大鼠骨髓间充质干细胞进行转录组分析,寻找潜在差异表达长链非编码RNA(lncRNA)及相关调控网络。
方法:将大鼠骨髓间充质干细胞分为实验组和对照组,前者在葡萄球菌A蛋白(1 μg/mL)模拟的骨髓炎环境下成骨诱导分化7,14 d,后者正常成骨诱导分化7,14 d;通过茜素红染色以及碱性磷酸酶活性检测观察两组细胞成骨诱导分化情况;收集两组细胞进行转录组测序,进行GO、KEGG生物信息学分析;采用实时荧光定量PCR进一步验证差异表达lncRNA。
结果与结论:①成骨诱导分化7,14 d,对照组茜素红着色面积均高于实验组,对照组碱性磷酸酶活性明显高于实验组(P < 0.01);②转录组测序结果显示328个lncRNAs表达差异,其中显著上调的184个,显著下调的144个;③基因本体富集分析发现差异表达基因功能主要涉及生物过程、细胞组分以及分子功能,KEGG富集分析发现主要参与的信号转导途径有肿瘤坏死因子信号通路、MAPK信号通路、肠道炎症疾病通路等,与骨形成、骨代谢相关;④选取与成骨分化相关的差异表达明显的6个lncRNAs,qPCR验证后发现ENSRNOT00000092811、TCONS_00023877、XR_001836916.1与高通量测序中的表达趋势一致;⑤结果表明,多个lncRNA参与骨髓炎状态的大鼠骨髓间充质干细胞成骨分化能力调节,且可能通过信号转导途径肿瘤坏死因子信号通路、MAPK信号通路等发挥作用。
https://orcid.org/0000-0003-2381-3939 (文虹杰) 
中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 骨髓炎, 骨髓间充质干细胞, 成骨分化, 转录组测序, lncRNA

Abstract: BACKGROUND: Recently, osteomyelitis environment has been found to significantly inhibit the osteogenic differentiation of bone marrow mesenchymal stem cells, thereby affecting bone formation and bone metabolism, but the specific mechanism remains unclear. 
OBJECTIVE: Transcriptome analysis was conducted on rat bone marrow mesenchymal stem cells with osteogenic differentiation induced by staphylococcal protein A to search for potential differentially expressed lncRNAs and related regulatory networks. 
METHODS: Bone marrow mesenchymal stem cells of rats were divided into experimental group and control group. The former group was induced osteogenic differentiation for 7 and 14 days in staphylococcal protein A (1 μg/mL) (to simulate osteomyelitis environment), while the control group was induced osteogenic differentiation for 7 and 14 days without any treatment. The content detection of alkaline phosphatase and alizarin red staining were used to observe the osteogenic induction of the cells. Two groups of cells were collected for transcriptome sequencing, gene ontology and KEGG bioinformatics analysis. Differential expression levels of lncRNAs were further verified by real-time fluorescence quantitative PCR.
RESULTS AND CONCLUSION: (1) After 7 and 14 days of osteogenic differentiation, the staining area of alizarin red in the control group was larger than that in the experimental group, and the alkaline phosphatase activity in the control group was significantly higher than that in the experimental group (P < 0.01). (2) Transcriptome sequencing results found 328 lncRNAs with significant differential expression level, with 184 significantly up-regulated and 144 significantly down-regulated. (3) Gene enrichment analysis showed that the function of differentially expressed genes mainly involved biological process, cell classification and molecular function. KEGG enrichment analysis found that the main signal pathways included tumor necrosis factor, MAPK and intestinal inflammatory disease signaling pathways, which were related to bone formation and bone metabolism. (4) Six differentially expressed lncRNAs related to osteogenesis differentiation were selected, and the expression trends of ENSRNOT00000092811, TCONS_00023877, and XR_001836916.1 were consistent with high-throughput sequencing after qPCR validation. (5) The results showed that multiple lncRNAs were involved in the regulation of osteogenic differentiation ability of rat bone marrow mesenchymal stem cells in osteomyelitis, and they may play a role through signal pathway, such as tumor necrosis factor and MAPK signaling pathways. 

Key words: osteomyelitis, bone marrow mesenchymal stem cell, osteogenic differentiation, transcriptome sequencing, lncRNA

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