中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (17): 2734-2738.doi: 10.3969/j.issn.2095-4344.1702

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

去除脂肪型脂肪酸结合蛋白4阳性干细胞可影响肺部无纤毛(clara)细胞的增殖与自我更新

杨瑞晨,刘述越,刘慧娟   

  1. 上海交通大学Bio-X研究院,上海市 200240
  • 修回日期:2019-01-15 出版日期:2019-06-18 发布日期:2019-06-18
  • 通讯作者: 刘慧娟,博士,副研究员,上海交通大学Bio-X研究院,上海市 200240
  • 作者简介:杨瑞晨,女,1994年生,汉族,山东省济宁市人,在读硕士,主要从事间充质干细胞的增殖、分化与衰老研究。
  • 基金资助:

    国家自然科学基金项目(91749201),项目参与人:杨瑞晨

Removal of fatty acid-binding protein 4 positive stem cells affects the proliferation and self-renewal capability of clara cells in the lung

Yang Ruichen, Liu Shuyue, Liu Huijuan   

  1. Bio-X Institutes, Shanghai Jiao Tong University, Shanghai 200240, China
  • Revised:2019-01-15 Online:2019-06-18 Published:2019-06-18
  • Contact: Liu Huijuan, PhD, Associate researcher, Bio-X Institutes, Shanghai Jiao Tong University, Shanghai 200240, China
  • About author:Yang Ruichen, Master candidate, Bio-X Institutes, Shanghai Jiao Tong University, Shanghai 200240, China
  • Supported by:

    the National Natural Science Foundation of China, No. 91749201 (to YRC)

摘要:

文章快速阅读:

文题释义:
脂肪型脂肪酸结合蛋白4(fatty acid-binding protein 4,FABP4):
脂肪型脂肪酸结合蛋白4是脂肪酸结合蛋白家族中研究比较多的一种亚型,主要参与细胞内脂质的代谢和信号转导,并且是细胞生长分化及炎性反应的关键递质。
Clara细胞:是一种无纤毛上皮细胞,主要分布于终末细支气管和呼吸性细支气管上皮。Clara细胞具有活跃的增殖分化特性,参与支气管上皮损伤的修复过程。Clara细胞分泌蛋白是clara细胞最主要的分泌产物,具有抗炎、抗纤维化的生物学特性。

 

摘要
背景:
近年来关于脂肪型脂肪酸结合蛋白4(fatty acid-binding protein 4,FABP4)的研究已经很多,但肺中FABP4的表达情况与功能仍不明确。
目的:探究FABP4在肺中的表达情况和功能。
方法:利用FABP4 Cre; Rosa26-tdTomato小鼠示踪红色荧光蛋白表达以及免疫荧光染色共定位系统性地研究了FABP4在肺中的表达情况,并构建FABP4 Cre; iDTR转基因小鼠通过注射白喉毒素特异性去除肺部表达FABP4的细胞,初步探究FABP4在肺中的功能。
结果与结论:FABP4能标记成年小鼠肺部的巨噬细胞、无纤毛(clara)细胞、Ⅱ型肺泡细胞、PDGFRα和vimentin阳性间质细胞,但不能标记平滑肌细胞和纤毛(ciliated)细胞。另外,当去除肺部表达FABP4阳性细胞时会出现小鼠无纤毛(clara)细胞及纤毛(ciliated)细胞比例减少的表型,推测可能是去除了FABP4阳性干细胞特性细胞后影响了肺部无纤毛(clara)细胞的增殖与自我更新。该研究比较全面地揭示了FABP4在小鼠肺中的表达情况,并初步探究了FABP4在肺中的作用,为肺的免疫反应及稳态维持等相关研究奠定了一定的基础,并可能成为肺部疾病治疗的潜在靶点。


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
ORCID:
0000-0003-0981-0520(杨瑞晨)

关键词: 脂肪型脂肪酸结合蛋白4, FABP4, 肺, 巨噬细胞, 间质细胞, clara细胞, 国家自然科学基金

Abstract:

BACKGROUND: In recent years, there have been many studies about fatty acid-binding protein 4 (FABP4); however, few studies focus on the expression and function of FABP4 in the lung.
OBJECTIVE: To systematically explore the expression and function of FABP4 in the lung.
METHODS: FABP4 Cre; Rosa26-tdTomato mice were selected to trace red fluorescent protein expression and immunofluorescence co-localization analysis was used to systematically detect the expression of FABP4 in the lung. We made a further study on function of FABP4 in lung by constructing FABP4 Cre; iDTR transgenic mice injected with diphtheria toxin to remove the FABP4+ cells from the lung.
RESULTS AND CONCLUSION: FABP4 could label macrophages, clara cells, type II alveolar cells, PDGFRα+ and vimentin+ mesenchymal cells in the lung of adult mice, and could not label smooth muscle cells and ciliated cells. In addition, percentages of clara cells and ciliated cells decreased when the FABP4+ cells were removed from the lung. We supposed that removal of FABP4+ cells with stem cell characteristics could influence the proliferation and self-renewal of clara cells in the lung. This study comprehensively revealed the expression pattern of FABP4 in lung of mice and preliminarily explored the FABP4 function in the lung, laying a foundation for the study of pulmonary immune response and homeostasis maintenance. Moreover, FABP4 may become a potential target for the treatment of lung diseases.

Key words: fatty acid binding protein 4, FABP4, lung, macrophage, interstitial cells, clara cells, National Natural Science Foundation of China

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