中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (1): 96-100.doi: 10.12307/2022.016

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

高糖诱导人肾小管上皮细胞高表达干细胞因子

胥雪玲1 ,刘  军1 ,杨爱华2,王惠芳1 ,郭丹丹1 ,刘雪梅1 ,徐  岩1   

  1. 青岛大学附属医院,1肾病科,2检验科,山东省青岛市  266003
  • 收稿日期:2020-09-07 修回日期:2020-09-08 接受日期:2020-10-24 出版日期:2022-01-08 发布日期:2021-10-25
  • 通讯作者: 刘雪梅,博士,主任医师,青岛大学附属医院肾病科,山东省青岛市 266003
  • 作者简介:胥雪玲,女,1994年生,湖北省襄阳市人,汉族,青岛大学在读硕士,主要从事慢性肾脏病研究。
  • 基金资助:
    青岛市民生科技计划项目(19-6-1-18-nsh),项目负责人:刘雪梅;青岛大学医学部“临床医学+X”工程科研项目(2018-21),项目负责人:刘雪梅

High glucose induces high expression of stem cell factor in human renal tubular epithelial cells

Xu Xueling1, Liu Jun1, Yang Aihua2, Wang Huifang1, Guo Dandan1, Liu Xuemei1, Xu Yan1   

  1. 1Department of Nephrology, 2Laboratory Medicine, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
  • Received:2020-09-07 Revised:2020-09-08 Accepted:2020-10-24 Online:2022-01-08 Published:2021-10-25
  • Contact: Liu Xuemei, MD, Chief physician, Department of Nephrology, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
  • About author:Xu Xueling, Master candidate, Department of Nephrology, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
  • Supported by:
    Project of Science and Technology of Qingdao People’s Livelihood, No. 19-6-1-18- nsh (to LXM); the Scientific Research Project “Clinical Medicine+X” of Medical Department of Qingdao University, No. 2018-21 (to LXM)

摘要:

文题释义:
肾小管上皮细胞(HK-2细胞):是肾小管间质最活跃的细胞之一,在肾脏的生理功能和组织结构方面发挥重要作用,当肾脏受到炎症、缺氧、中毒等损伤因素作用后,肾小管发生一系列变化,包括肾小管上皮细胞活化、增生,进而肾小管出现扩张,最终可导致肾小管出现萎缩、凋亡和纤维化等变化。
干细胞因子:又称肥大细胞生长因子,是1990年来发现的一种重要的造血生长因子,主要由骨髓基质细胞产生。干细胞因子与肥大细胞的c-kit受体结合,可发挥调节肥大细胞增殖、分化、成熟和活化的作用。研究发现,干细胞因子/c-kit信号通路促进肥大细胞在糖尿病肾脏疾病肾间质中募集及活化,从而促进糖尿病肾脏疾病肾间质纤维化,并与肥大细胞的分布密度及肾间质纤维化呈显著正相关。

背景:糖尿病肾脏疾病是糖尿病最严重和最常见的慢性并发症之一,已经成为导致终末期肾衰竭的重要原因,但其确切的发生发展机制目前尚不清楚,也缺乏精准有效的防治措施。
目的:探讨高渗葡萄糖对人肾小管上皮细胞表型变化及干细胞因子表达的影响。
方法:体外培养人肾小管上皮细胞(HK-2细胞),分为正常糖组、高糖刺激组、甘露醇对照组,分别于0,12,24,48 h时间点收集各组细胞,在倒置显微镜下观察细胞形态,采用实时定量PCR和Western blot检测干细胞因子、α-平滑肌肌动蛋白、Ⅰ型胶原、纤维连接蛋白mRNA及蛋白的表达。
结果与结论:①与正常糖组相比,高糖刺激组肾小管上皮细胞形态发生明显改变,但甘露醇对照组细胞形态与正常生长的肾小管上皮细胞相比无明显改变;②高糖刺激组肾小管上皮细胞中干细胞因子、α-平滑肌肌动蛋白、Ⅰ型胶原、纤维连接蛋白mRNA及蛋白表达明显高于正常糖组,且呈时间依赖性增加;③肾小管上皮细胞中干细胞因子mRNA及蛋白的表达量与α-平滑肌肌动蛋白、Ⅰ型胶原、纤维连接蛋白的表达量呈正相关关系;④结果表明,高渗葡萄糖诱导人肾小管上皮细胞高表达干细胞因子,并呈时间依赖性;同时高糖刺激肾小管上皮细胞高表达α-平滑肌肌动蛋白、Ⅰ型胶原、纤维连接蛋白,说明高糖刺激肾小管上皮细胞转分化并产生大量细胞外基质,促进肾间质纤维化。
https://orcid.org/0000-0002-2134-4879(胥雪玲) 

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: 肾小管上皮细胞, 干细胞因子, 细胞外基质, 肾间质纤维化, 糖尿病肾脏疾病, 高糖

Abstract: BACKGROUND: Diabetic kidney disease is one of the most serious and common chronic complications of diabetes. It has become an important cause of end-stage renal failure. However, the exact mechanism of its occurrence and development is still unclear, and precise and effective prevention and treatment measures are lacking.
OBJECTIVE: To investigate the effect of hypertonic glucose on the phenotype changes of human renal tubular epithelial cells and the expression of stem cell factor.
METHODS:  Human renal tubular epithelial cells were cultured in vitro and divided into normal glucose group, high glucose stimulation group, and mannitol control group. The cells of each group were separately collected at 0, 12, 24 and 48 hours for detection. The cell morphology was observed under an inverted microscope. Real-time quantitative PCR and western blot assay were used to detect the expression of mRNA and protein of stem cell factor, α-smooth muscle actin, type I collagen, and fibronectin.   
RESULTS AND CONCLUSION: (1) Compared with the normal glucose group, the renal tubular epithelial cell morphology of the high glucose stimulation group changed significantly, but the cell morphology of the mannitol control group did not change significantly compared with renal tubular epithelial cells that grow normally. (2) The expression levels of mRNAs and proteins of stem cell factor, α-smooth muscle actin, type I collagen, and fibronectin of renal tubular epithelial cells in high glucose stimulation group were significantly higher than those of the normal glucose group, and increased in a time-dependent manner. (3) The expression levels of stem cell factor mRNA and protein in renal tubular epithelial cells were positively correlated with α-smooth muscle actin, type I collagen, and fibronectin. (4) These findings indicate that hypertonic glucose can up-regulate the expression of stem cell factor in renal tubular epithelial cells in a time-dependent way, meanwhile up-regulating the expression of α-smooth muscle actin, type I collagen and fibronectin, indicating that hypertonic glucose stimulates the transdifferentiation of renal tubular epithelial cells and the production of a large number of extracellular matrix, which promotes renal interstitial fibrosis.  

Key words: renal tubular epithelial cell, stem cell factor, extracellular matrix, renal interstitial fibrosis, diabetic kidney disease, high glucose

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