中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (24): 3865-3869.doi: 10.12307/2022.567

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

唾液体外诱导促进兔脂肪干细胞上皮分化

李晓文1,2,许颖捷1,2,贾梦莹1,2,史  玮1,2,贾馨雨1,2,龚忠诚1,2   

  1. 1新疆医科大学第一附属医院(附属口腔医院) 颌面肿瘤外科,新疆维吾尔自治区乌鲁木齐市  830054;2新疆维吾尔自治区口腔医学研究所,新疆维吾尔自治区乌鲁木齐市  830054
  • 收稿日期:2021-02-27 接受日期:2021-04-10 出版日期:2022-08-28 发布日期:2022-01-22
  • 通讯作者: 龚忠诚,博士,主任医师,博士生导师,硕士生导师,新疆医科大学第一附属医院(附属口腔医院) 颌面肿瘤外科,新疆维吾尔自治区乌鲁木齐市 830054;新疆维吾尔自治区口腔医学研究所,新疆维吾尔自治区乌鲁木齐市 830054
  • 作者简介:李晓文,女,1994年生,河北省任县人,汉族,2021年新疆医科大学毕业,硕士,医师,主要从事口腔颌面外科软组织缺损修复基础研究。
  • 基金资助:
    自治区研究生科研创新项目(XJ2020G193),项目负责人:李晓文

Epithelial differentiation of adipose stem cells induced by saliva in vitro

Li Xiaowen1, 2, Xu Yingjie1, 2, Jia Mengying1, 2, Shi Wei1, 2, Jia Xinyu1, 2, Gong Zhongcheng1, 2   

  1. 1Oncological Department of Oral & Maxillofacial Surgery, First Affiliated Hospital (Affiliated Stomatological Hospital) of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China; 2Xinjiang Uyghur Autonomous Region Institute of Stomatology, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • Received:2021-02-27 Accepted:2021-04-10 Online:2022-08-28 Published:2022-01-22
  • Contact: Gong Zhongcheng, MD, Chief physician, Doctoral supervisor, Master’s supervisor, Oncological Department of Oral & Maxillofacial Surgery, First Affiliated Hospital (Affiliated Stomatological Hospital) of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China; Xinjiang Uyghur Autonomous Region Institute of Stomatology, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • About author:Li Xiaowen, Master, Physician, Oncological Department of Oral & Maxillofacial Surgery, First Affiliated Hospital (Affiliated Stomatological Hospital) of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China; Xinjiang Uyghur Autonomous Region Institute of Stomatology, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • Supported by:
    Autonomous Region Postgraduate Research and Innovation Project, No. XJ2020G193 (to LXW)

摘要:

文题释义:
表皮生长因子:是一种多肽类物质,在体内可由多种细胞分泌而产生,大量临床试验及动物实验发现,表皮生长因子在创面修复过程中发挥着非常重要的作用,能够增强细胞角蛋白19的表达,因而表皮生长因子是细胞上皮分化研究中常用的诱导剂。
细胞角蛋白19:近年来,脂肪干细胞向上皮分化的研究逐渐增多,细胞角蛋白19是能够反映细胞上皮分化的标志物之一,许多学者采用细胞角蛋白19的表达来说明细胞的上皮分化,它也成为了上皮分化研究中热门的指标。

背景:颊脂垫常用于修复口腔颌面部缺损,其能使口腔黏膜快速上皮分化。由于缺损创面暴露于唾液中,因而认为唾液可能促进颊脂垫中的脂肪干细胞上皮化。
目的:探讨唾液体外诱导促进兔脂肪干细胞上皮分化的可行性。
方法:取两三个月龄的新西兰大白兔脂肪组织,分离、培养脂肪干细胞并传代。将第3代脂肪干细胞分为3组,即阴性对照组、表皮生长因子组与唾液组,后两组采用10 μg/L表皮生长因子、15%唾液来诱导脂肪干细胞,倒置显微镜观察细胞形态变化,诱导7,14 d采用免疫荧光、RT-PCR检测细胞角蛋白19的表达。
结果与结论:①唾液诱导后脂肪干细胞形态由长梭形逐渐变为短梭形,甚至不规则的扁圆形;②诱导7,14 d,表皮生长因子组、唾液组细胞角蛋白19呈阳性表达,均高于阴性对照组,且诱导14 d细胞角蛋白19的表达量明显高于诱导7 d;③诱导7,14 d,表皮生长因子组、唾液组细胞角蛋白19的mRNA表达量均高于阴性对照组(P < 0.01),且诱导14 d的表达量要显著高于诱导7 d(P < 0.01);④结果表明,唾液在一定程度上能促进脂肪干细胞向上皮分化。

https://orcid.org/0000-0002-3010-4017 (龚忠诚) 

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: 干细胞, 脂肪干细胞, 表皮生长因子, 唾液, 上皮, 分化, 细胞角蛋白19

Abstract: BACKGROUND: Buccal fat pads are often used to repair oral and maxillofacial defects, which can rapidly differentiate the oral mucosa from the epithelium. Because the defect wound is exposed to saliva, it is believed that saliva may promote the epithelialization of adipose stem cells in the buccal fat pad.  
OBJECTIVE: To investigate the feasibility of promoting epithelial differentiation of rabbit adipose stem cells by induction of saliva in vitro.
METHODS:  Fat harvested from 2-3 months New Zealand white rabbit was isolated, cultured, generated adipose stem cells for passage. Passage 3 adipose stem cells were divided into three groups: negative control group, epidermal growth factor group and saliva group. Adipose stem cells were induced by 10 μg/L epidermal growth factor and 15% saliva in the epidermal growth factor group and saliva group. Cell morphology changes were observed under inverted microscope. The expression of cytokeratin 19 was detected by immunofluorescence and RT-PCR after 7 and 14 days of induction.  
RESULTS AND CONCLUSION: (1) After saliva induction, the morphology of adipose stem cells was gradually changed from long spindle shape to short spindle shape or even irregular oblate shape. (2) At 7 and 14 days, cytokeratin 19 was positively expressed in the epidermal growth factor and saliva groups, which was higher than that in the negative control group. The expression level of cytokeratin 19 in the 14-day induction group was significantly higher than that in the 7-day induction group. (3) The expression of cytokeratin 19 mRNA in epidermal growth factor and saliva groups was higher than that in negative control group (P < 0.01). The expression level at 14 days was significantly higher than that at 7 days (P < 0.01). (4) Results suggest that saliva can promote the epithelial differentiation of adipose stem cells to some extent.

Key words: stem cell, adipose stem cell, epidermal growth factor, saliva, epithelium, differentiation, cytokeratin 19

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