天津医药 ›› 2024, Vol. 52 ›› Issue (2): 129-135.doi: 10.11958/20230437

• 实验研究 • 上一篇    下一篇

小鼠骨髓和脂肪间充质干细胞定向分化能力的比较研究

钟家帅(), 冯玉梅()   

  1. 天津医科大学肿瘤医院,国家恶性肿瘤临床医学研究中心,天津市恶性肿瘤临床医学研究中心,天津市肿瘤防治重点实验室,天津医科大学肿瘤医院肿瘤研究所生物化学与分子生物学研究室(邮编300060)
  • 收稿日期:2023-03-27 修回日期:2023-05-08 出版日期:2024-02-15 发布日期:2024-01-26
  • 通讯作者: E-mail:ymfeng@tmu.edu.cn E-mail:whutzjs@163.com;ymfeng@tmu.edu.cn
  • 作者简介:钟家帅(1999),男,硕士在读,主要从事肿瘤分子生物学方面研究。E-mail:whutzjs@163.com
  • 基金资助:
    天津市医学重点学科(专科)建设项目(TJYXZDXK-009A)

Comparative study on the directed differentiation ability of mouse bone marrow and adipose-derived mesenchymal stem cells

ZHONG Jiashuai(), FENG Yumei()   

  1. Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer;Tianjin’s Clinical Research Center for Cancer;Key Laboratory of Cancer Prevention and Therapy, Tianjin;Department of Biochemistry and Molecular Biology, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
  • Received:2023-03-27 Revised:2023-05-08 Published:2024-02-15 Online:2024-01-26
  • Contact: E-mail:ymfeng@tmu.edu.cn E-mail:whutzjs@163.com;ymfeng@tmu.edu.cn

摘要:

目的 探讨小鼠骨髓源性间充质干细胞(BM-MSCs)和脂肪源性间充质干细胞(AD-MSCs)的定向分化能力。方法 从C57BL/6J小鼠股骨骨髓和腹股沟白色脂肪组织中分别分离和培养BM-MSCs和AD-MSCs,分别使用成骨、成软骨和成脂诱导分化培养基诱导两种细胞定向分化。采用茜素红、阿利新蓝和油红O染色检测成骨、成软骨和成脂分化程度;实时荧光定量PCR(qPCR)鉴定MSCs并检测定向分化相关基因Runx2、Sp7(成骨),Sox9、Col2a1(成软骨),Pparg和Cebpa(成脂)表达水平,确定细胞的定向分化能力。基于GEO数据库中GSE43804和GSE122778数据集的小鼠和人类BM-MSCs和AD-MSCs基因表达谱数据,分析差异表达基因及其富集的信号通路。结果 分离培养得到的BM-MSCs和AD-MSCs细胞形态不同,AD-MSCs梭形形态更明显;两种细胞均表达CD29、CD44和CD90,不表达CD34和CD45。定向诱导后AD-MSCs的成骨和成脂分化程度高于BM-MSCs,而成软骨分化程度低于BM-MSCs(P<0.05);定向诱导后AD-MSCs中Runx2、Pparg和Cebpa mRNA表达水平高于BM-MSCs,Sox9 mRNA表达水平低于BM-MSCs(P<0.05)。小鼠和人的AD-MSCs高表达的基因富集于PPAR和WNT信号通路,BM-MSCs高表达的基因富集于软骨和骨发育信号通路。结论 小鼠AD-MSCs成骨和成脂分化能力强于BM-MSCs,而成软骨分化能力弱于BM-MSCs,PPAR、WNT、软骨和骨发育信号通路的活化状态在决定BM-MSCs和AD-MSCs不同定向分化潜能中起重要调节作用。

关键词: 间质干细胞, 骨髓, 脂肪类, PPARγ, Wnt信号通路, 成骨分化, 成软骨分化, 成脂分化

Abstract:

Objective To investigate the targeted differentiation ability of mouse bone marrow derived mesenchymal stem cells (BM-MSCs) and adipose-derived mesenchymal stem cells (AD-MSCs). Methods BM-MSCs and AD-MSCs were isolated and cultured from bone marrow of femur and white adipose tissue of groin of C57BL/6J mice respectively, and the two types of cells were induced by osteogenic, chondrogenic and adipogenic differentiation medium respectively. Alizarin red, alcian blue and oil red O staining were used to detect the differentiated degree of osteogenic, chondrogenic and lipogenic differentiation. Real-time fluorescence quantitative PCR (qPCR) was used to identify MSCs and detected expression levels of directed differentiation-related genes Runx2, Sp7 (osteoblast), Sox9, Col2a1 (chondroblast), Pparg and Cebpa (lipogenesis) to determine the directed differentiation ability of cells. Based on gene expression profiles of mouse and human BM-MSCs and AD-MSCs in GEO database GSE43804 and GSE122778, the differentially expressed genes and their enrichment signal pathways were analyzed. Results The cell morphology of BM-MSCs and AD-MSCs obtained by isolation and culture was different, and spindle-shaped morphology was more obvious in AD-MSCs. Both cells expressed CD29, CD44 and CD90, but did not express CD34 and CD45. AD-MSCs showed higher osteogenic and lipogenic differentiation than those of BM-MSCs after directed induction, while chondrogenic differentiation was lower in AD-MSCs than that of BM-MSCs (P<0.05). After directional induction, expression levels of Runx2, Pparg and Cebpa mRNA were higher in AD-MSCs than those in BM-MSCs, and Sox9 mRNA expression levels were lower than those in BM-MSCs (P<0.05). Highly expressed genes of AD-MSCs in mice and human were enriched in PPAR and WNT signaling pathways. Highly expressed genes of BM-MSCs were enriched in cartilage and bone developmental signaling pathways. Conclusion The osteogenic and adipogenic differentiation ability of mouse AD-MSCs is stronger than those of BM-MSCs, while the chondrogenic differentiation ability AD-MSCs is weaker than that of BM-MSCs. The activation status of PPAR, WNT, cartilages and skeletal system development signaling pathways plays an important regulatory role in determining the different directional differentiation potential of AD-MSCs and BM-MSCs.

Key words: mesenchymal stem cells, bone marrow, fats, PPAR gamma, Wnt signaling pathway, osteogenic differentiation, chondrogenic differentiation, adipogenic differentiation

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