中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (23): 3630-3635.doi: 10.3969/j.issn.2095-4344.1306

• 骨组织构建 bone tissue construction • 上一篇    下一篇

泼尼松龙可抑制转化生长因子β激活激酶1诱导的成骨细胞凋亡

张  雯1,张  蕾1,任守忠1,刘日升2   

  1.  (1海南医学院第一附属医院,海南省海口市  570102;2海南省肿瘤医院,海南省海口市  570102)
  • 收稿日期:2019-03-29 出版日期:2019-08-18 发布日期:2019-08-18
  • 通讯作者: 刘日升,副主任药师,海南省肿瘤医院,海南省海口市 570102
  • 作者简介:张雯,1981年生,海南省海口市人,2009年中国药科大学毕业,主管药师,主要从事药学研究。
  • 基金资助:

    海南省卫生计生行业科研项目(16A200077),项目负责人:张蕾

Prednisolone inhibites osteoblast apoptosis induced by transforming growth factor beta activated kinase 1

Zhang Wen1, Zhang Lei1, Ren Shouzhong1, Liu Risheng2   

  1. (1the First Affiliated Hospital of Hainan Medical University, Haikou 570102, Hainan Province, China; 2Hainan Cancer Hospital, Haikou 570102, Hainan Province, China)
  • Received:2019-03-29 Online:2019-08-18 Published:2019-08-18
  • Contact: Liu Risheng, Associate chief pharmacist, Hainan Cancer Hospital, Haikou 570102, Hainan Province, China
  • About author:Zhang Wen, Pharmacist-in-charge, the First Affiliated Hospital of Hainan Medical University, Haikou 570102, Hainan Province, China
  • Supported by:

    the Hainan Provincial Health and Family Planning Research Project, No. 16A200077 (to ZL)

摘要:

文章快速阅读:

文题释义:

碱性磷酸酶染色:碱性磷酸酶较多存在于成熟中性粒细胞中。在碱性条件下,碱性磷酸酶经镁离子激活后能将磷酸酯水解为磷酸钠和甘油,磷酸钠再与氯化钙、硝酸钴、硫化铵发生一系列化学反应,生成棕色的硫化钴定位于胞质内,可用于评估成骨细胞分化能力。
钙结节染色:成骨分化是干细胞的一个重要特性。在特定的诱导培养基作用一段时间后,干细胞可分化为成骨细胞,在细胞表面沉积钙盐,形成钙结节。应用茜素红的复合物,可用于鉴定干细胞是否已成功向成骨细胞转化。
摘要
背景:
研究显示转化生长因子β激活激酶1(transforming growth factor beta activated kinase 1,TAK1)在骨、关节的发育以及骨形态信号转导中发挥着重要作用,与骨关节炎的发生也存在一定的相关性。
目的:探究泼尼松龙通过抑制TAK1表达对诱导成骨细胞凋亡的影响。
方法:将M3T3-E1成骨细胞经原代培养后传代培养。取第3代细胞分为3组,正常细胞组(对照组)、阴性转染+泼尼松龙组、TAK1 siRNA转染+泼尼松龙组。采用碱性磷酸酶染色和钙结节染色评估成骨细胞分化能力的变化;采用免疫印迹法(Western blot)检测细胞内磷酸化(p)-TAK1、TAK1、磷酸化c-jun氨基末端激酶(p-JNK)、JNK蛋白表达,MTT法检测M3T3-E1细胞增殖情况;流式细胞仪检测细胞周期以及细胞凋亡变化。
结果与结论:①TAK1 siRNA转染+泼尼松龙组细胞的碱性磷酸酶红染程度较少,阴性转染+泼尼松龙组次之,正常细胞组碱性磷酸酶染色最多;钙结节染色显示与正常细胞组相比,阴性转染+泼尼松龙组钙结节数量明显减少,TAK1 siRNA转染+泼尼松龙组结节数量最少;②荧光显微镜显示,阴性转染+泼尼松龙组细胞出现破碎,形态发生改变,TAK1 siRNA转染+泼尼松龙组破碎细胞数量明显增加;③Western Blot 显示,3组间p-TAK1、p-JNK 蛋白表达量逐渐降低(P < 0.05);④MTT检测显示,3组间TAK1 siRNA转染+泼尼松龙组细胞增殖抑制率最高(P < 0.05);在12-48 h随着时间的延长,细胞增殖抑制率呈逐渐上升趋势,在72 h时开始下降;⑤流式细胞仪检测结果显示,TAK1 siRNA转染+泼尼松龙组G2期细胞比例高于其他2组,S期细胞比例显著低于其他2组(P < 0.05);⑥TAK1 siRNA转染+泼尼松龙组细胞凋亡率明显高于正常细胞组、阴性转染+泼尼松龙组(P < 0.05);⑦结果说明,沉默TAK1表达后能够增强泼尼松龙诱导成骨细胞凋亡的作用,可能与JNK信号通路相关。

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
ORCID: 0000-0002-2395-5948(张雯)

关键词: 转化生长因子β激活激酶1, 泼尼松龙, 成骨细胞, 细胞凋亡, JNK信号通路, TAK1, 基因沉默

Abstract:

BACKGROUND: Transforming growth factor beta activated kinase 1 (TAK1) has been shown to play important roles in development of bone and joint and bone morphology signal transduction, and is related to osteoarthritis.
OBJECTIVE: To explore the influence of prednisolone on osteoblast apoptosis induced by inhibiting TAK1 expression.
METHODS: M3T3-E1 osteoblasts were cultured and passaged. The third generation of cells were divided into three groups: control group (normal group), negative transfection + prednisolone group, and TAK1 siRNA transfection + prednisolone group. The changes of osteoblast differentiation ability were evaluated by alkaline phosphatase staining and calcium nodule staining. Intracellular phosphorylation (p)-TAK1, and TAK1, phosphorylated c-jun amino, terminal kinase (p-JNK), and JNK protein expression levels were detected by western blot assay. MTT assay was used for M3T3-E1 cell proliferation. Flow cytometry was used to detect the cell cycle and apoptosis.
RESULTS AND CONCLUSION: (1) Alkaline phosphatase staining showed that the number of stained cells in the TAK1 siRNA transfection + prednisolone group was least, followed by negative transfection + prednisolone group, and most in the control group. Calcium nodule staining showed that the number of intracellular calcium nodules in the negative transfection + prednisolone and TAK1 siRNA transfection + prednisolone groups decreased compared with the control group, especially the TAK1 siRNA transfection + prednisolone group. (2) Fluorescence microscope showed that the cells in the negative transfection + prednisolone group were broken and the morphology changed. The number of broken cells in the TAK1 siRNA transfection + prednisolone group increased significantly. (3) Western blot assay showed that the expression levels of p-TAK1 and p-JNK protein decreased gradually (P < 0.05). (4) MTT assay showed that TAK1 siRNA transfection + prednisolone group had highest cell inhibition rate (P < 0.05). Within 12 to 48 hours, the cell inhibition rate was on a rise, and then decreased at 72 hours. (5) The results of flow cytometry showed that the proportion of G2 phase cells in the TAK1 siRNA transfection + prednisolone group was higher than that in the other two groups, and the proportion of S phase cells was lower than that in the other two groups (P < 0.05). (6) The apoptosis rate in the TAK1 siRNA transfection + prednisolone group was higher than that in the other two groups (P < 0.05). (7) These results suggest that silencing TAK1 expression can increase the apoptosis of osteoblasts induced by prednisolone, which may be related to JNK signaling pathway.

Key words: transforming growth factor beta activated kinase 1, prednisolone, osteoblast, apoptosis, JNK signaling pathway, TAK1, gene silencing

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