中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (33): 5287-5292.doi: 10.3969/j.issn.2095-4344.2017.33.007

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

妊娠对大鼠脂肪干细胞增殖及成肝分化潜能的影响

李俊男1,陈嘉勇2,张 毅2,陆晓涛1   

  1. 1昆明医科大学第四附属医院骨与创伤外科,云南省昆明市 650000;2昆明医科大学第二附属医院急诊医学部,云南省昆明市 650000
  • 修回日期:2017-08-25 出版日期:2017-11-28 发布日期:2017-12-01
  • 通讯作者: 陈嘉勇,博士,教授,博士生导师,昆明医科大学第二附属医院急诊医学部,云南省昆明市 650000
  • 作者简介:李俊男,男,1984年生,云南省昆明市人,汉族,2017年昆明医科大学毕业,博士,医师,主要从事间充质干细胞研究。

Pregnancy influences the proliferation and hepatic differentiation of rat adipose-derived stem cells

Li Jun-nan1, Chen Jia-yong2, Zhang Yi2, Lu Xiao-tao1   

  1. 1Department of Orthopedics and Traumatology, Fourth Affiliated Hospital of Kunming Medical University, Kunming 650000, Yunnan Province, China; 2Department of Emergency, Second Affiliated Hospital of Kunming Medical University, Kunming 650000, Yunnan Province, China
  • Revised:2017-08-25 Online:2017-11-28 Published:2017-12-01
  • Contact: Chen Jia-yong, M.D., Professor, Doctoral supervisor, Department of Emergency, Second Affiliated Hospital of Kunming Medical University, Kunming 650000, Yunnan Province, China
  • About author:Li Jun-nan, M.D., Physician, Department of Orthopedics and Traumatology, Fourth Affiliated Hospital of Kunming Medical University, Kunming 650000, Yunnan Province, China

摘要:

文章快速阅读:

文题释义:
脂肪干细胞的优势:
近年来从脂肪组织中分离得到的一种具有多向分化潜能的干细胞。研究报道脂肪干细胞在体外培养条件下具有多向分化潜能,可分化为脂肪细胞、软骨细胞、成骨细胞以及横纹肌细胞。脂肪干细胞能够在体外稳定增殖且衰亡率低,同时取材无创方便,少量组织即可获取大量干细胞。脂肪干细胞对体外培养条件需求较低,能够快速传代生长,并能够保持稳定的倍增率直到13-15代,适宜大规模培养。这些优势使其成为最具临床应用前景的干细胞。
成肝细胞诱导分化:即体外使用不同培养基,加入不同的生长因子或特殊血清定向诱导间充质干细胞可转化为肝前体细胞或肝细胞。已发表的文献表明,间充质干细胞转分化为肝细胞主要受以下关键因素的影响:①细胞因子和生长因子;②来自细胞外基质的组成;③间充质干细胞培养的物理参数。通过对这些因素的研究,科研人员将不断开发改良诱导间充质干细胞成肝分化的研究策略。

 

摘要
背景:
研究发现妊娠与干细胞的活性有明显关联。然而,尚未见到有关妊娠对脂肪干细胞影响的相关报道。
目的:评估妊娠状态对大鼠脂肪干细胞增殖能力和诱导分化为类肝细胞潜能的影响。
方法:分别获取正常大鼠和妊娠大鼠2种来源的脂肪干细胞进行原代分离、培养和鉴定。利用CCK8法检测脂肪干细胞的增殖能力。采用相同肝诱导培养基,诱导脂肪干细胞分化为类肝细胞。荧光定量PCR检测诱导第0,7,14,21天时肝细胞标志物的表达;ELISA方法检测白蛋白分泌和尿素合成水平。
结果与结论:①成功分离培养出正常大鼠和妊娠大鼠来源脂肪干细胞,经流式细胞术鉴定符合干细胞一般特性(CD44+/CD45-/CD90+);②与正常大鼠来源脂肪干细胞相比较,妊娠大鼠来源脂肪干细胞增殖更快,诱导分化为成骨、成脂和成肝细胞时间更短,肝细胞标志物变化更加迅速,白蛋白分泌和尿素合成能力更高;③妊娠对脂肪干细胞的增殖和分化具有促进作用,推测可能与雌激素水平相关。

 

关键词: 干细胞, 脂肪干细胞, 妊娠, 细胞增殖, 成肝分化

Abstract:

BACKGROUND: Pregnancy exhibits a significant association with stem cell activity. However, there is yet no report on the effects of pregnancy on adipose-derived stem cells.
OBJECTIVE: To investigate the effect of pregnancy on the proliferation and differentiation of rat adipose-derived stem cells into hepatocyte-like cells. 
METHODS: Adipose-derived stem cells were isolated and cultured from normal and pregnant Sprague-Dawley rats, and identified. The cell proliferation was detected by cell counting kit-8. All harvested adipose-derived stem cells were cultured in hepatocyte-induced medium and induced to differentiate into hepatocyte-like cells. Then the expressions of hepatocyte markers were detected at 0, 7, 14, 21 days of induction by fluorescent quantitative PCR; albumin secretion and urea synthesis were detected by using ELISA method.
RESULTS AND CONCLUSION: Adipose-derived stem cells were successfully isolated from normal and pregnant rats, and CD45 negative staining and CD44/CD90 positive staining were observed, which was consistent with the characteristics of stem cells. Compared to the normal cells, adipose-derived stem cells from pregnant rats showed faster proliferation as well as osteogenic, adipogenic and hepatocyte-like differentiation, with the better liver function of hepatocyte-like cells. To conclude, pregnancy can promote the proliferation and differentiation of adipose-derived stem cells, which may be related to the estrogen level.

 

Key words: Adipose Tissue, Mesenchymal Stem Cells, Pregnancy, Cell Proliferation, Cell Differentiation, Hepatocytes, Tissue Engineering

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