中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (11): 1728-1732.doi: 10.3969/j.issn.2095-4344.3084

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

高同型半胱氨酸血症诱导Cbs+/-小鼠肾损伤的作用机制

吴  凯1,2,3,刘  昆1,2,3,谢  琳2,3,4,卢冠军2,3,5,马胜超2,3,4,李桂忠2,3,4,曹  军1,2,3,揭育祯1,2,3,姜怡邓2,3,4,郝银菊2,3,4   

  1. 宁夏医科大学,1临床医学院,4基础医学院,宁夏回族自治区银川市   750004;2国家卫生健康委代谢性心血管疾病研究重点实验室,宁夏回族自治区银川市  750004;3宁夏血管损伤与修复研究重点实验室,宁夏回族自治区银川市   750004;5宁夏医科大学总医院,宁夏回族自治区银川市   750004 
  • 收稿日期:2020-03-27 修回日期:2020-04-01 接受日期:2020-05-13 出版日期:2021-04-18 发布日期:2020-12-21
  • 通讯作者: 郝银菊,教授,国家卫生健康委代谢性心血管疾病研究重点实验室,宁夏回族自治区银川市 750004;宁夏血管损伤与修复研究重点实验室,宁夏回族自治区银川市 750004;宁夏医科大学基础医学院,宁夏回族自治区银川市 750004
  • 作者简介:吴凯,男,1964年生,宁夏回族自治区银川市人,汉族,1987年宁夏医科大学毕业,副教授,讲师,主要从事同型半胱氨酸对细胞损伤方向的研究。 共同第一作者:刘昆,男,1992年生,安徽省太和县人,汉族,2018年滨州医学院毕业,主要从事同型半胱氨酸导致肾脏损伤的研究。
  • 基金资助:
    宁夏高等学校科学研究项目(NZY2017122),项目负责人:郝银菊

Mechanism of hyperhomocysteinemia induced renal injury in Cbs+/- mice

Wu Kai1, 2, 3, Liu Kun1, 2, 3, Xie Lin2, 3, 4, Lu Guanjun2, 3, 5, Ma Shengchao2, 3, 4, Li Guizhong2, 3, 4, Cao Jun1, 2, 3, Jie Yuzhen1, 2, 3, Jiang Yideng2, 3, 4, Hao Yinju2, 3, 4   

  1. 1Clinical Medical College of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 2Key Laboratory of Metabolic Cardiovascular Diseases Research of National Health Commission, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 3Ningxia Key Laboratory of Vascular Injury and Repair Research, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 4Basic Medical College of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 5General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China 

  • Received:2020-03-27 Revised:2020-04-01 Accepted:2020-05-13 Online:2021-04-18 Published:2020-12-21
  • Contact: Hao Yinju, Professor, Key Laboratory of Metabolic Cardiovascular Diseases Research of National Health Commission, Yinchuan 750004, Ningxia Hui Autonomous Region, China; Ningxia Key Laboratory of Vascular Injury and Repair Research, Yinchuan 750004, Ningxia Hui Autonomous Region, China; Basic Medical College of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • About author:Wu Kai, Associate Professor, Lecturer, Clinical Medical College of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; Key Laboratory of Metabolic Cardiovascular Diseases Research of National Health Commission, Yinchuan 750004, Ningxia Hui Autonomous Region, China; Ningxia Key Laboratory of Vascular Injury and Repair Research, Yinchuan 750004, Ningxia Hui Autonomous Region, China Liu Kun, Clinical Medical College of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; Key Laboratory of Metabolic Cardiovascular Diseases Research of National Health Commission, Yinchuan 750004, Ningxia Hui Autonomous Region, China; Ningxia Key Laboratory of Vascular Injury and Repair Research, Yinchuan 750004, Ningxia Hui Autonomous Region, China Wu Kai and Liu Kun contributed equally to this work.
  • Supported by:
    Ningxia Higher Education Scientific Research Project, No. NZY2017122 (to HYJ)

摘要:

文题释义:
高同型半胱氨酸血症:同型半胱氨酸是半胱氨酸经蛋氨酸转化而来的一种中间产物,当其代谢异常时会导致体内同型半胱氨酸水平升高,并引起高同型半胱氨酸血症。研究发现,慢性肾脏病的分期越高其高同型半胱氨酸血症的发病率也越高,因此同型半胱氨酸水平对慢性肾脏病的发生、治疗和预防都有重要意义。
足细胞:是一种终末分化细胞,通过足突附着在基底膜上。足细胞是构成肾小球滤过屏障的重要组成部分,同时也参与肾小球基底膜基质的合成;足细胞发生凋亡会导致肾小球滤过功能损伤并促进蛋白尿的发生,最终引起肾脏损伤。

背景:在慢性肾脏病中常常伴有同型半胱氨酸水平升高,导致足细胞凋亡,但是其具体机制还尚未清楚。
目的:探讨高同型半胱氨酸血症诱导Cbs+/-小鼠肾损伤的作用机制。
方法:选取体质量相近的Cbs+/+小鼠(对照组)和Cbs+/-小鼠(模型组),每组10只,两组小鼠均饲以高蛋氨酸饮食,8周后处死,分离血清,留取肾脏组织。采用全自动生化分析仪检测血清同型半胱氨酸、尿素氮、肌酐水平;糖原染色法及透射电镜观察肾脏损伤情况;TUNEL染色观察肾小球中细胞凋亡情况;Western blot检测Bax、Bcl-2和caspase12的蛋白表达水平。
结果与结论:①与Cbs+/+小鼠比较,Cbs+/-小鼠血清同型半胱氨酸、尿素氮及肌酐水平均明显升高(P < 0.01);②糖原染色结果显示,Cbs+/+小鼠肾小球基底膜清楚,粗细均匀,而Cbs+/-小鼠肾小球基底膜则呈现不同程度的粗细不均,膜区增宽、基质增厚;③透射电镜显示,Cbs+/+小鼠肾小球基底膜清晰,足突规则,而Cbs+/-小鼠肾小球基底膜局灶性增厚,足突不规则融合;④TUNEL染色结果显示,与Cbs+/+小鼠比较,Cbs+/-小鼠肾小球内凋亡细胞数量明显增加;⑤Western blot检测结果显示,Bax/Bcl-2和caspase12的蛋白水平均升高(P < 0.05);⑥结果表明:足细胞凋亡在高同型半胱氨酸血症诱导Cbs+/-小鼠肾损伤中发挥着重要的作用。
https://orcid.org/0000-0002-1458-1462 (吴凯) ;https://orcid.org/0000-0002-0938-1378 (刘昆) 

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 肾损伤, 高同型半胱氨酸血症, 凋亡, 足细胞, 同型半胱氨酸, 尿素氮, 肌酐, 小鼠

Abstract: BACKGROUND: In chronic kidney disease, there is often an increase in the level of homocysteine, which can lead to podocyte apoptosis, but the specific mechanism is not clear. 
OBJECTIVE: To investigate the mechanism of hyperhomocysteinemia-induced renal injury in Cbs+/-  mice. 
METHODS: Cbs+/+ mice (control group) and Cbs+/- mice (model group) with similar body weight were selected, with 10 mice in each group, and were fed with high methionine diet. After 8 weeks, the mice were killed, the serum was separated and the kidney tissue was obtained. The levels of serum homocysteine, urea nitrogen and creatinine were measured by automatic biochemical analyzer. The renal injury was observed by Periodic Acid-Schiff staining and transmission electron microscope. TUNEL staining was used to observe the apoptosis of glomeruli. The protein expression levels of Bax, Bcl-2 and caspase12 were detected by western blot. 
RESULTS AND CONCLUSION: Compared with Cbs+/+ mice, the level of serum homocysteine, urea nitrogen and creatinine in Cbs+/-  mice were significantly increased (P < 0.01). The Periodic Acid-Schiff staining results showed that the glomerular basement membrane of Cbs+/+ mice was clear and the thickness was uniform, while the Cbs+/-  mouse glomerular basement membrane showed varying degrees of uneven thickness, widening of membrane area and thickening of matrix. Under the transmission electron microscope, the glomerular basement membrane of Cbs+/+ mice was clear and the foot process was regular, while the glomerular basement membrane of Cbs+/-  mice was locally thickened and the foot process was irregular fusion. TUNEL staining showed that the number of apoptotic cells in glomeruli of Cbs+/-  mice was significantly increased compared with Cbs+/+ mice; meanwhile, western blot detection showed that the protein levels of Bax/Bcl-2 and caspase12 were significantly increased (P < 0.05). To conclude, podocyte apoptosis plays an important role in hyperhomocysteinemia-induced renal injury in Cbs+/- mice.


Key words: renal injury, hyperhomocysteinemia, apoptosis, podocyte, homocysteine, urea nitrogen, creatinine, mouse

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