中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (20): 3173-3177.doi: 10.3969/j.issn.2095-4344.3213

• 组织构建与生物活性因子 tissue construction and bioactive factors • 上一篇    下一篇

尿液环境中肠上皮细胞及其凋亡因子半胱氨酸蛋白酶3、Bax和Bcl-2表达的变化

徐  彬,杨秀书,刘  旋,王振兴   

  1. 贵州省人民医院泌尿外科,贵州省贵阳市   550002
  • 收稿日期:2020-05-11 修回日期:2020-05-16 接受日期:2020-07-09 出版日期:2021-07-18 发布日期:2021-01-15
  • 通讯作者: 王振兴,硕士,主治医师,贵州省人民医院泌尿外科,贵州省贵阳市 550002
  • 作者简介:徐彬,男,1981年生,贵州省贵阳市人,2015年贵州医科大学毕业,硕士,主治医师,主要从事泌尿系肿瘤及上尿路修复重建方面的研究。
  • 基金资助:
    贵州省科学技术厅资助项目(黔科合基础[2018]1100),项目负责人:王振兴

Changes of intestinal epithelial cells and their apoptotic factors Caspase-3, Bax and Bcl-2 under urinary environment

Xu Bin, Yang Xiushu, Liu Xuan, Wang Zhenxing   

  1. Department of Urology, Guizhou Provincial People’s Hospital, Guiyang550002, Guizhou Province, China
  • Received:2020-05-11 Revised:2020-05-16 Accepted:2020-07-09 Online:2021-07-18 Published:2021-01-15
  • Contact: Wang Zhenxing, Master, Attending physician, Department of Urology, Guizhou Provincial People’s Hospital, Guiyang 550002, Guizhou Province, China
  • About author:Xu Bin, Master, Attending physician, Department of Urology, Guizhou Provincial People’s Hospital, Guiyang 550002, Guizhou Province, China
  • Supported by:
    the grant from the Department of Science and Technology of Guizhou Province, No. [2018]1100 (to WZX)

摘要:

文题释义:
尿液环境:是连接肾与膀胱通道中的细胞在一种主要成分为水、尿素、尿酸、无机盐的液体生存空间中,直接或间接影响细胞生存的各种因素。此次研究选择pH 5.5、高浓度渗透压为2 000 mOsm/(kg•H2O)的人工尿液和一定比例的培养基稀释构成细胞液体生存空间的影响因素。
肠上皮细胞:是具有极性的柱状上皮细胞,参与小肠黏膜上皮组织的构成,由隐窝下1/3处的干细胞生成,在3-5 d内到达肠腔,其子代细胞沿隐窝绒毛细胞轴迁移、逐渐成熟衰老最终在绒毛顶端脱落。肠道黏膜上皮细胞稳态是由上皮细胞不断增殖与凋亡之间的平衡来维系,一般情况下凋亡处于低水平。

背景:回肠代输尿管重建尿路,在临床上取得了较好的疗效。回肠代输尿管后的适应性改变与什么有关目前尚未见有关报道。此次研究希望通过观察尿液对肠上皮细胞内凋亡因子表达的影响,进一步探讨背后可能的机制,为回肠代输尿管后的病理学特点提供实验依据。
目的:观察尿液环境对肠上皮细胞内凋亡因子半胱氨酸蛋白酶3(Caspase-3)、Bax、Bcl-2表达的影响,进一步探讨尿液环境是否促进了肠上皮细胞的凋亡及其机制。
方法:选取人工尿液分别与培养基按0,1∶1,1∶2,1∶4,1∶8,1∶16,1∶32,1∶64,1∶128进行稀释,处理人正常肠上皮细胞,分别处理24,48,72 h,用CCK-8法检测,观察尿液对肠上皮细胞增殖的影响。采用RT-PCR法和Western blot法检测肠上皮细胞中Caspase-3、Bax和Bcl-2的mRNA和蛋白表达情况。
结果与结论:①肠上皮细胞内凋亡因子Caspase-3、Bax在尿液浓度最高的组中呈高表达,随着尿液浓度梯度的不断降低,表达水平逐渐降低;②肠上皮细胞内抗凋亡因子Bcl-2在尿液浓度高的组中(1∶8和1∶16组)呈低表达,随着尿液浓度梯度的不断降低,表达水平逐渐升高;③提示尿液浓度越高,促凋亡因子Caspase-3、Bax在肠上皮细胞内呈高表达,而抑制凋亡因子Bcl-2呈低表达,表明尿液对肠道上皮细胞具有凋亡促进作用。

关键词: 尿液, 肠上皮细胞, 凋亡, 回肠, 输尿管, Caspase-3, Bax, Bcl-2

Abstract: BACKGROUND: Reconstruction of the urinary tract with the ileum instead of the ureter has achieved a good clinical effect. There are yet no reports on what the adaptation relates to after the ileum acts as a substitute of the ureter. This study attempted to observe the effect of urine on the expression of apoptotic factors in intestinal epithelial cells, to further explore the possible underlying mechanism, and to provide experimental evidence for the pathological characteristics of the ileum instead of the ureter. 
OBJECTIVE: To observe the effect of urine environment on the expression of Caspase-3, Bax and Bcl-2 in human intestinal epithelial cells and to further investigate whether the urine environment promotes the apoptosis of intestinal epithelial cells and its underlying mechanism. 
METHODS: Human normal intestinal epithelial cells were treated with artificial urine that was diluted in culture medium at the rate of 0, 1:1, 1:2, 1:4, 1:8, 1:16, 1:32, 1:64, and 1:128 for 24, 48, and 72 hours. Cell counting kit-8 was used to observe the effect of urine on the proliferation of intestinal epithelial cells. RT-PCR and western blot assay were used to detect the mRNA and protein expressions of Caspase-3, Bax and Bcl-2 in intestinal epithelial cells. 
RESULTS AND CONCLUSION: Caspase-3 and Bax were highly expressed in intestinal epithelial cells of the group with the highest urine concentration, and the expression level gradually decreased as the urine concentration gradient decreased. The expression of Bcl-2 in intestinal epithelial cells was low in the group with the highest urine concentration, and the expression level gradually increased as the urine concentration gradient decreased. The higher the urine concentration, the higher the expression of pro-apoptotic factors Caspase-3 and Bax in intestinal epithelial cells, and the lower the expression of anti-apoptotic factor Bcl-2,indicating that the urine can promote the apoptosis of intestinal epithelial cells.

Key words: urine, intestinal epithelial cells, apoptosis, ileum, ureter, Caspase-3, Bax, Bcl-2

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