中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (19): 3055-3060.doi: 10.12307/2024.168

• 细胞相关实验/试验研究Cell related experimental/trial studies • 上一篇    下一篇

氧化修饰高密度脂蛋白激活活性氧启动p38信号促使大鼠卵巢颗粒细胞凋亡

郭  琴,吴敏敏,陶  莹   

  1. 广东药科大学附属第一医院/第一临床医学院妇产科,广东省广州市   510080
  • 收稿日期:2023-03-25 接受日期:2023-06-01 出版日期:2024-07-08 发布日期:2023-09-26
  • 通讯作者: 陶莹,硕士,主任医师,广东药科大学附属第一医院/第一临床医学院妇产科,广东省广州市 510080
  • 作者简介:郭琴,女,1984年生,湖南省株洲市人,汉族,2018年广州医科大学毕业,硕士,副主任医师,主要从事妇科肿瘤研究。
  • 基金资助:
    广东省医学科学技术研究基金项目(A2019364),项目负责人:郭琴

Oxidized high-density lipoprotein promotes rat ovarian granulosa cell apoptosis through reactive oxygen species-initiated p38 signaling pathway

Guo Qin, Wu Minmin, Tao Ying   

  1. Department of Obstetrics and Gynecology, The First Affiliated Hospital/The First Clinical Medicine School of Guangdong Pharmaceutical University, Guangzhou 510080, Guangdong Province, China
  • Received:2023-03-25 Accepted:2023-06-01 Online:2024-07-08 Published:2023-09-26
  • Contact: Tao Ying, Master, Chief physician, Department of Obstetrics and Gynecology, The First Affiliated Hospital/The First Clinical Medicine School of Guangdong Pharmaceutical University, Guangzhou 510080, Guangdong Province, China
  • About author:Guo Qin, Master, Associate chief physician, Department of Obstetrics and Gynecology, The First Affiliated Hospital/The First Clinical Medicine School of Guangdong Pharmaceutical University, Guangzhou 510080, Guangdong Province, China
  • Supported by:
    Guangdong Medical Science and Technology Research Fund Project, No. A2019364 (to GQ)

摘要:


文题释义:

多囊卵巢综合征:育龄期女性常见的生殖功能障碍和内分泌代谢紊乱性疾病,是以稀发排卵、高雄激素表现以及卵巢多囊样改变等生殖障碍并伴有内分泌异常、代谢紊乱甚至合并一些精神问题为特征的一组临床综合征。
卵泡闭锁:指卵泡未完全发育成熟或未排卵而与卵通过细胞凋亡机制进入自行退化的过程。


背景:多囊卵巢综合征患者体内高密度脂蛋白发生了部分氧化修饰,而氧化修饰高密度脂蛋白与排卵障碍的关系及其机制尚不清楚。

目的:探讨氧化修饰高密度脂蛋白对卵巢颗粒细胞凋亡的影响,并分析其可能的作用机制。
方法:构建多囊卵巢综合征大鼠模型,取心脏血并分离血清,进一步分离高密度脂蛋白,采用高密度脂蛋白炎症指数、丙二醛水平和脂蛋白琼脂糖凝胶电泳法检验其氧化程度。分离正常大鼠卵巢颗粒细胞,分别给予模型大鼠血清分离的高密度脂蛋白和氧化修饰高密度脂蛋白处理,CCK-8法检测细胞活力,流式细胞术检测细胞凋亡,H2DCF-DA染色检测活性氧生成水平,Western blot检测p38信号活性。卵巢颗粒细胞分别给予活性氧抑制剂N-乙酰半胱氨酸(NAC)和四甲基哌啶(Tempol)和p38抑制剂SB203580预处理后,再给予氧化修饰高密度脂蛋白处理,然后检测细胞凋亡、活性氧生成和p38信号活性。

结果与结论:多囊卵巢综合征模型大鼠血清中高密度脂蛋白部分发生氧化修饰。模型大鼠血清分离的高密度脂蛋白和氧化修饰高密度脂蛋白抑制卵巢颗粒细胞活力和促进细胞凋亡(均P < 0.05),二者能促进大鼠卵巢颗粒细胞活性氧生成和提高p38活性(均P < 0.05)。NAC、Tempol和SB203580均能逆转氧化修饰高密度脂蛋白诱导的卵巢颗粒细胞凋亡(均P < 0.05);Tempol、NAC能抑制氧化修饰高密度脂蛋白诱导的p38活性(均P < 0.05);SB203580对活性氧的生成没有调节作用(P > 0.05)。结果表明:多囊卵巢综合征能促使高密度脂蛋白发生部分氧化修饰,氧化修饰高密度脂蛋白能通过激活活性氧-p38信号通路促使大鼠卵巢颗粒细胞凋亡。

https://orcid.org/0000-0003-4655-3869 (郭琴) 

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: 多囊卵巢综合征, 氧化修饰高密度脂蛋白, 卵巢颗粒细胞, 凋亡, 活性氧, p38

Abstract: BACKGROUND: Oxidative modification of high-density lipoprotein occurs in patients with polycystic ovary syndrome. However, the relationship between oxidized high-density lipoprotein and ovulation dysfunction and its mechanism are unknown. 
OBJECTIVE: To investigate the effect and potential mechanism of oxidized high-density lipoprotein on ovarian granulosa cell apoptosis.  
METHODS: Polycystic ovary syndrome rat model was established, then the high-density lipoprotein was harvested from the rat serum of heart blood. The degree of oxidation of the high-density lipoprotein was detected by high-density lipoprotein inflammation index assay, malondialdehyde assay and lipoprotein agarose gel electrophoresis assay. The normal rat ovarian granulosa cells were isolated and treated with high-density lipoprotein and oxidized high-density lipoprotein isolated from the model rat serum. Cell viability was detected by CCK-8 assay. Cell apoptosis was detected by flow cytometry. The generation of reactive oxygen species was detected by H2DCF-DA staining. The p38 signaling activity was detected by western blot assay. Ovarian granulosa cells were pretreated with reactive oxygen species inhibitors N-acetylcysteine, tetramethylpiperidine (Tempol) and p38 inhibitor SB203580, and then treated with oxidized high-density lipoprotein. Finally, cell apoptosis, reactive oxygen species production and p38 signaling activity were detected. 
RESULTS AND CONCLUSION: A portion of the high-density lipoprotein from the serum of polycystic ovary syndrome model rats affected oxidative modification. High-density lipoprotein and oxidized high-density lipoprotein isolated from the model rat serum inhibited granulosa cell viability and promoted apoptosis (all P < 0.05). They promoted rat granulosa cell reactive oxygen species production and p38 activation (all P < 0.05). N-acetylcysteine, Tempol and SB203580 reversed oxidized high-density lipoprotein induced granulosa cell apoptosis (all P < 0.05). N-acetylcysteine and Tempol suppressed oxidized high-density lipoprotein-induced p38 activation (all P < 0.05). SB203580 did not have a regulatory effect on reactive oxygen species production (P > 0.05). In summary, polycystic ovary syndrome can promote partial oxidative modification of high-density lipoprotein. The oxidized high-density lipoprotein promotes rat granulosa cell apoptosis by the activation of the reactive oxygen species-initiated p38 signaling pathway. 

Key words: polycystic ovary syndrome, oxidized high-density lipoprotein, granulosa cell, apoptosis, reactive oxygen species, p38

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