中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (17): 2638-2643.doi: 10.3969/j.issn.2095-4344.2017.17.003

• 脂肪干细胞 adipose-derived stem cells • 上一篇    下一篇

CD54+和CD54-脂肪干细胞的成脂分化能力

李德全1,梁至洁2,韦金儒3,黄  海2,黄敏红2,池刚毅4,黎洪棉4   

  1. 1南昌市第三医院乳腺肿瘤一科,江西省南昌市  330009;广西医科大学第五附属医院,2肝胆腺体外科,3心血管内科,4整形美容外科,广西壮族自治区南宁市  530022
  • 修回日期:2017-02-06 出版日期:2017-06-18 发布日期:2017-06-29
  • 通讯作者: 黎洪棉,博士,主任医师,教授,广西医科大学第五附属医院整形美容外科,广西壮族自治区南宁市 530022
  • 作者简介:李德全,男,1968年生,江西省南昌市人,汉族,2008年中南大学毕业,博士,副主任医师,副教授,主要从事乳腺疾病的基础与临床研究。 并列第一作者:梁至洁,女,1988年生,广西壮族自治区宾阳县人,壮族,2014年天津医科大学毕业,硕士,医师,主要从事再生医学、干细胞研究。
  • 基金资助:

    国家自然科学基金资助项目(81560316,81560358);广西科学研究与技术开发计划资助项目(桂科攻1598012-1);广西自然科学基金重点项目(2016GXNSFDA380016);南宁市科学研究与技术开发计划资助项目(20153089,zc20153002)

Adipogenic capacity of CD54+/CD54- adipose-derived stem cells

Li De-quan1, Liang Zhi-jie2, Wei Jin-ru3, Huang Hai2, Huang Min-hong2, Chi Gang-yi4, Li Hong-mian4   

  1. 1Department of Breast Surgery, Third Hospital of Nanchang, Nanchang 330009, Jiangxi Province, China; 2Department of Hepatobiliary and Gland Surgery, 3Department of Vasculocardiology, 4Department of Plastic and Aesthetic Surgery, the Fifth Affiliated Hospital of Guangxi Medical University, Nanning 530022, Guangxi Zhuang Autonomous Region, China
  • Revised:2017-02-06 Online:2017-06-18 Published:2017-06-29
  • Contact: Li Hong-mian, M.D., Chief physician, Professor, Department of Plastic and Aesthetic Surgery, the Fifth Affiliated Hospital of Guangxi Medical University, Nanning 530022, Guangxi Zhuang Autonomous Region, China
  • About author:Li De-quan, M.D., Associate chief physician, Associate professor, Department of Breast Surgery, Third Hospital of Nanchang, Nanchang 330009, Jiangxi Province, China Liang Zhi-jie, Master, Physician, Department of Hepatobiliary and Gland Surgery, the Fifth Affiliated Hospital of Guangxi Medical University, Nanning 530022, Guangxi Zhuang Autonomous Region, China Li De-quan and Liang Zhi-jie contributed equally to this work.
  • Supported by:

    the National Natural Science Foundation of China, No. 81560316, 81560358; the Scientific Research and Development Plan of Guangxi Zhuang Autonomous Region in China, No. 1598012-1; the Natural Science Foundation of Guangxi Zhuang Autonomous Region, No. 2016GXNSFDA380016; the Science Research and Technology Development Plan of Nanning City, No. 20153089, zc20153002

摘要:

文章快速阅读:

文题释义:
脂肪干细胞的分化:
脂肪干细胞可在脂肪组织微环境中分化为体积较大的成熟脂肪细胞,其分化过程可受多因素影响,如微环境、药物、生长因子或关键信号通路的激活等。如何筛选这些因素并应用于成脂分化诱导的优化对生物修复工程研究具有重要意义。
成脂分化:脂肪干细胞具有多向分化潜能,如成骨、成软骨、成脂等,经过特殊的分化诱导培养基培养后可以达到定向诱导分化的目的,是生物修复工程的重要种子细胞之一。脂肪干细胞的成脂分化能力是决定其应用于软组织缺损修复的重要属性之一,通过定向诱导后脂肪干细胞能够向成熟的脂肪细胞分化,其表面抗原及其旁分泌功能发生变化,如何优化干细胞的成脂分化功能是目前生物修复工程学的重要研究方向之一。

 

摘要
背景:
研究表明,脂肪干细胞具有多向分化潜能,但是其向成熟脂肪细胞分化的效率仍较低,只有30%-40%。因此,如何提高脂肪干细胞的成脂分化能力是软组织再生研究过程中需要解决的关键科学问题。
目的:观察兔脂肪干细胞表面标志物CD54的表达与其成脂分化能力的关系,并探讨同一诱导剂对CD54+和CD54-兔脂肪干细胞成脂分化的影响。
方法:取新西兰大白兔(8-12周龄)腹股沟皮下脂肪垫3 mL,采用贴壁法体外分离培养兔脂肪干细胞并行多向分化诱导及细胞表型标志物鉴定。取第3代细胞经免疫磁珠分选得到CD54+兔脂肪干细胞和CD54-兔脂肪干细胞,经成脂诱导14 d后行油红O染色,检测成熟脂肪细胞的密度及细胞内脂滴含量。RT-PCR检测脂肪干细胞成脂分化相关基因表达水平。
结果与结论:①兔脂肪干细胞具有间充质干细胞特性,可向成熟脂肪细胞、成骨细胞和软骨细胞表型分化,细胞表面标志物CD29、CD44、CD49d、CD54、CD73、CD90和CD105表达均为阳性,而CD31、CD34和CD45表达阴性;②成脂诱导第14天,CD54+兔脂肪干细胞分化为成熟脂肪细胞的密度和细胞内脂滴含量均高于CD54-兔脂肪干细胞,差异均有显著性意义(P < 0.05);③成脂诱导14 d后,CD54+兔脂肪干细胞成脂相关基因ADD1、C/EBPα、PPARγ的mRNA表达水平明显高于CD54-兔脂肪干细胞,差异均有显著性意义(P < 0.05);④结果表明,CD54+脂肪干细胞具有高成脂分化能力。

 

 

ORCID: 0000-0001-7043-6457(黎洪棉)

关键词: 干细胞, 脂肪干细胞, 细胞表面标志, 成脂分化, 细胞诱导, 组织工程, 国家自然科学基金

Abstract:

BACKGROUND: Studies have shown that adipose-derived stem cells have pluripotent differentiation potential, but only 30%-40% of cells can differentiate into mature adipocytes with low adipogenic differentiation potential. Therefore, how to improve the adipogenic differentiation ability of adipose-derived stem cells is a key problem to be solved in the process of soft tissue regeneration.

OBJECTIVE: To observe the relationship between the surface marker CD54 of rabbit adipose-derived stem cells and their adipogenic capacity, and to explore the adipogenic differentiation of CD54+/CD54- adipose-derived stem cells under the same induction.
METHODS: We successfully isolated and cultured the adipose-derived stem cells from inguinal subcutaneous fat pads (3 ml) of New Zealand white rabbits, aged 8-12 weeks, which were induced into multi-differentiation and used to detect surface markers. We sorted the passage 3 adipose-derived stem cells by immunomagnetic beads and divided into two categories including CD54+ and CD54- adipose-derived stem cells. After 14 days of adipogenic induction, the cells in the two groups were subjected to oil red O staining and were compared by detecting the density of mature adipocytes and lipid droplet contenT.

RESULTS AND CONCLUSION: The cultured adipose-derived stem cells possessed the characteristics of mesenchymal stem cells that could differentiate into mature adipocytes, osteoblasts and chondrocytes, with CD29, CD44, CD49d, CD54, CD73, CD90 and CD105 positive expression while CD31, CD34 and CD45 negative expression. Fourteen days after adipogenic induction, the density of mature adipocytes and the intracellular lipid droplet content in the CD54+ group were significantly higher than those in the CD54- group (P < 0.05). We also found that the mRNA expressions of PPARγ, ADD1, C/EBPα related to adipogenic differentiation in the CD54+ group were significantly higher than those in the CD54- group (P < 0.05). Taken together, CD54+ adipose-derived stem cells have excellent adipogenic differentiation capacity.

 

 

Key words: Stem Cells, Adipose Tissue, Adipogenesis, Tissue Engineering

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