中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (11): 1728-1732.doi: 10.12307/2023.190

• 软骨组织构建 cartilage tissue construction • 上一篇    下一篇

表皮生长因子受体对小鼠关节软骨表层细胞增殖、分化、凋亡的影响

朱洲均1,张佳惠1,高  健1,续  斌1,王  超 2,向  伟2,贾昊若3,王国胜1   

  1. 1新疆维吾尔自治区骨科医院,新疆医科大学第六附属医院,新疆维吾尔自治区乌鲁木齐市  830000;2石河子大学医学院第一附属医院,新疆维吾尔自治区石河子市  832000;3第四军医大学西京医院骨科,陕西省西安市  710000
  • 收稿日期:2022-04-20 接受日期:2022-06-08 出版日期:2023-04-18 发布日期:2022-09-24
  • 通讯作者: 王国胜,硕士,副主任医师,新疆医科大学第六附属医院,新疆维吾尔自治区乌鲁木齐市 830000 贾昊若,博士,主治医师,第四军医大学西京医院骨科,陕西省西安市 710000
  • 作者简介:朱洲均,男,1992年生,新疆维吾尔自治区昌吉市人,俄罗斯族,2021年石河子大学毕业,硕士,主要从事骨关节疾病的基础与临床研究。
  • 基金资助:
    国家自然科学基金青年基金项目(81702164),项目负责人:贾昊若

Effects of epidermal growth factor receptor on proliferation, differentiation and apoptosis of mouse articular cartilage surface cells

Zhu Zhoujun1, Zhang Jiahui1, Gao Jian1, Xu Bin1, Wang Chao2, Xiang Wei2, Jia Haoruo3, Wang Guosheng1   

  1. 1Orthopaedic Hospital of Xinjiang Uygur Autonomous Region, The Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China; 2The First Affiliated Hospital of Shihezi University School of Medicine, Shihezi 832000, Xinjiang Uygur Autonomous Region, China; 3Department of Orthopedics, Xijing Hospital of Air Force Military Medical University, Xi’an 710000, Shaanxi Province, China
  • Received:2022-04-20 Accepted:2022-06-08 Online:2023-04-18 Published:2022-09-24
  • Contact: Wang Guosheng, Master, Associate chief physician, Orthopaedic Hospital of Xinjiang Uygur Autonomous Region, The Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China Jia Haoruo, MD, Attending physician, Department of Orthopedics, Xijing Hospital of Air Force Military Medical University, Xi’an 710000, Shaanxi Province, China
  • About author:Zhu Zhoujun, Master, Orthopaedic Hospital of Xinjiang Uygur Autonomous Region, The Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81702164 (to JHR)

摘要:

文题释义:
表皮生长因子受体:是一种分子质量为170 kD的跨膜糖蛋白,也被称为HER或ErbB受体家族,表达于大多数细胞膜表面;配体与细胞膜外受体结合后,其构象发生了改变,使得细胞内酪氨酸激酶磷酸化,将信号从细胞外传递到细胞内,调控细胞对外界刺激的反应,从而调节细胞的生长、存活、转化及凋亡等多种生物学活动。
转化生长因子α:是第一个被发现的表皮生长因子家族成员,它包含类表皮生长因子域,与表皮生长因子具有相似的结构和功能,在机体内所有组织细胞中,转化生长因子α首先以前肽的形式合成,并固定在细胞膜上,通过分泌信号激活表皮生长因子受体。

背景:表皮生长因子受体是调节细胞周期的关键因子,其介导的细胞下游信号通路广泛参与调控细胞的多种生物学过程,然而该信号通路对小鼠关节软骨表层细胞的增殖、分化及凋亡的影响有待进一步研究。
目的:分离并培养小鼠关节软骨表层细胞,验证表皮生长因子受体信号通路对小鼠关节软骨表层细胞的增殖、分化及凋亡的影响。
方法:通过纤连蛋白黏附及酶消化法体外分离培养小鼠关节软骨表层细胞并鉴定;取P3细胞分别给予表皮生长因子受体信号通路激动剂转化生长因子α 100 μg/L与抑制剂Gefitinib 10 μmol/L,常规培养基为对照组。通过CCK-8法检测细胞增殖情况同时利用实时荧光定量检测增殖相关基因Ki67的mRNA表达水平;肿瘤坏死因子α(25 μg/L)诱导细胞凋亡,AOEB染色鉴定凋亡情况,实时荧光定量PCR检测抑制凋亡基因Bcl-2与促进凋亡基因Bax的mRNA表达水平;对各组细胞进行成软骨、成骨、成脂连续诱导14-21 d,利用实时荧光定量PCR检测软骨相关基因Sox9、成骨相关基因Runx2、脂肪相关基因脂蛋白脂肪酶的mRNA表达水平。
结果与结论:①体外分离培养小鼠关节软骨表层细胞,形态偏长,免疫荧光鉴定阳性表达Prg4;②CCK-8检测结果提示转化生长因子α组细胞增殖能力明显增强,而Ki67 mRNA表达水平显著升高(P < 0.05);③AOEB染色结果提示转化生长因子α组细胞凋亡水平降低,Bcl-2 mRNA表达水平显著升高,Bax mRNA表达水平显著降低(P < 0.05);④诱导三系分化实时荧光定量PCR结果显示,转化生长因子α组Runx2 mRNA表达水平显著升高(P < 0.05),而Sox9的mRNA表达水平显著降低(P < 0.05);⑤结果表明,表皮生长因子受体信号通路参与关节软骨表层细胞的增殖、分化及凋亡,转化生长因子α介导表皮生长因子受体促进关节软骨表层细胞增殖及成骨分化,抑制其向成软骨分化及凋亡。

https://orcid.org/0000-0001-9624-8243(朱洲均)

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: 骨关节炎, 关节软骨表层细胞, 表皮生长因子受体, 转化生长因子α, 增殖, 分化, 凋亡

Abstract: BACKGROUND: Epidermal growth factor receptor is a key factor regulating the cell cycle and its downstream signaling pathway is widely involved in the regulation of various biological processes of cells.
OBJECTIVE: To isolate and culture articular cartilage surface cells from mice and to verify the effect of epidermal growth factor receptor signaling pathway on the proliferation, differentiation and apoptosis of articular cartilage surface cells.
METHODS: Articular cartilage surface cells from mice were isolated and cultured in vitro by fibronectin adhesion and enzyme digestion and identified. Passage 3 cells were separately treated with transforming growth factor α (100 μg/L), Gefitinib (10 μmol/L), and conventional medium (control group). Cell proliferation was detected by cell counting kit-8 and Ki67 gene expression was detected by RT-PCR. Cell apoptosis was induced by transforming growth factor α (25 μg/L) and AOEB staining was used to identify the apoptosis. RT-PCR was used to detect the expression of Bcl2 and Bax genes. Chondrogenic, osteogenic, and adipogenic induction were conducted for 14-21 days in each group and the mRNA expressions of Sox9, Runx2, and lipoprotein lipase were detected by RT-PCR.
RESULTS AND CONCLUSION: Articular cartilage surface cells isolated and cultured in vitro were long-shaped and positively expressed PRG4 identified by immunofluorescence. Cell counting kit-8 results showed that after treatment with transforming growth factor α, cell proliferation ability and the mRNA level of Ki67 were significantly increased (P < 0.05). AOEB staining results showed that after treatment with transforming growth factor α, the apoptotic level was significantly decreased, the mRNA level of Bcl2 was significantly increased (P < 0.05), and the mRNA level of Bax was significantly decreased (P < 0.05). RT-PCR results revealed that the mRNA level of Runx2 was significantly increased (P < 0.05) and the mRNA level of Sox9 was significantly decreased after treatment with transforming growth factor α. To conclude, the epidermal growth factor receptor signaling pathway is involved in the proliferation, differentiation, and apoptosis of articular surface chondrocytes. Epidermal growth factor receptor mediated by transforming growth factor α can promote the proliferation and osteogenic differentiation of articular cartilage surface cells and inhibit the chondrogenic differentiation and apoptosis of articular cartilage surface cells.

Key words: osteoarthritis, articular cartilage surface cell, epidermal growth factor receptor, Transforming growth factor α, proliferation, differentiation, apoptosis

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