实验动物与比较医学 ›› 2025, Vol. 45 ›› Issue (4): 403-410.DOI: 10.12300/j.issn.1674-5817.2024.194

• 人类疾病动物模型 • 上一篇    下一篇

不同浓度环磷酰胺诱导早发性卵巢功能不全小鼠模型及作用机制研究

贡磊磊1(), 王晓霞2, 封学伟1, 李心蕾1, 赵涵1, 张雪艳1()(), 冯欣1()   

  1. 1.首都医科大学附属北京妇产医院/北京妇幼保健院, 北京 100026
    2.北京市肛肠医院, 北京 100120
  • 收稿日期:2025-01-02 修回日期:2025-04-22 出版日期:2025-08-25 发布日期:2025-09-01
  • 通讯作者: 张雪艳(1969—),女,学士,副主任药师,研究方向:妇产科临床药学。E-mail:xueyan625@ccmu.edu.cn。ORCID: 0009-0007-6631-9363;
    冯 欣(1965—),女,硕士,主任药师,研究方向:妇产科临床药学。E-mail:fengxin1115@ccmu.edu.cn。ORCID: 0000-0002-6296-0321
  • 作者简介:贡磊磊(1989—),男,博士,主管药师,研究方向:妇产科中药药理学及临床药学。E-mail:gl890925@ccmu.edu.cn
  • 基金资助:
    国家自然科学基金青年科学基金项目“SIRT5驱动FOXO3a去乙酰化保护卵母细胞免受氧化损伤改善早发性卵巢功能不全及坤泰成方干预作用”(82204698)

A Mouse Model and Mechanism Study of Premature Ovarian Insufficiency Induced by Different Concentrations of Cyclophosphamide

GONG Leilei1(), WANG Xiaoxia2, FENG Xuewei1, LI Xinlei1, ZHAO Han1, ZHANG Xueyan1()(), FENG Xin1()   

  1. 1.Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, Beijing 100026, China
    2.Beijing Rectum Hospital, Beijing 100120, China
  • Received:2025-01-02 Revised:2025-04-22 Published:2025-08-25 Online:2025-09-01
  • Contact: ZHANG Xueyan (ORCID: 0009-0007-6631-9363 ), E-mail: xueyan625@ccmu.edu.cn;
    FENG Xin (ORCID: 0000-0002-6296-0321), E-mail: fenxin1115@ccmu.edu.cn;

摘要:

目的 观察比较不同浓度环磷酰胺(cyclophosphamide, CTX)诱导小鼠早发性卵巢功能不全(premature ovarian insufficiency,POI)模型的效果并探讨损伤机制。 方法 32只6~8周龄的C57BL/6J雌性小鼠按体重随机区组法分为4组,每组8只,分别用75 mg/kg CTX、120 mg/kg CTX、120 mg/kg CTX+12 mg/kg 白消安(Busulfan)和同体积生理盐水腹腔单次注射来建立POI模型,测定每组小鼠的卵巢系数、血清中雌二醇(estradiol,E2)和卵泡刺激素(follicle stimulating hormone,FSH)水平,并通过蛋白质印迹法检测不同造模浓度条件下卵巢组织内NAD依赖性蛋白脱酰酶5(NAD-dependent deacetylase sirtuin-5,SIRT5)和叉头框蛋白O3a(forkhead box protein O3a,FOXO3a)蛋白表达水平的变化规律。筛选最佳造模浓度后,将40只6~8周龄的C57BL/6J雌性小鼠按体重随机区组法分为5组,每组8只;以生理盐水作为对照,用120 mg/kg CTX造模后第1、2、7、14天,通过蛋白质印迹法检测不同造模时间内卵巢组织中SIRT5和FOXO3a蛋白表达水平的变化规律。 结果 与生理盐水对照组比较,不同浓度的CTX(75 mg/kg和120 mg/kg)和120 mg/kg CTX+12 mg/kg Busulfan均可以诱导小鼠出现POI损伤,其中120 mg/kg CTX造模小鼠的卵巢系数(P<0.001)和E2水平变化较小(P<0.05),120 mg/kg CTX+12 mg/kg Busulfan组小鼠被毛粗糙,光泽度下降,反应迟钝,状态最差。与生理盐水对照组相比,75 mg/kg CTX造模组小鼠的卵巢组织中FOXO3a表达显著下调(P<0.05),SIRT5表达没有显著变化(P>0.05),而120 mg/kg CTX造模组的SIRT5(P<0.05)和FOXO3a(P<0.05)表达均显著下调。120 mg/kg CTX造模后第2和7天,SIRT5(P<0.01)和FOXO3a(P<0.001)表达均显著下调,且第7天时表达水平变化最大(SIRT5,P<0.000 1;FOXO3a,P<0.000 1)。 结论 120 mg/kg CTX诱导小鼠POI模型的卵巢损伤小于75 mg/kg CTX诱导的POI模型,并且120 mg/kg CTX造模第7天的SIRT5和FOXO3a表达变化最为显著,其作用机制可能与SIRT5-FOXO3a通路活性受抑制相关。

关键词: 环磷酰胺, 早发性卵巢功能不全, 小鼠模型, SIRT5-FOXO3a通路

Abstract:

Objective To observe and compare the effects of different concentrations of cyclophosphamide (CTX) in inducing premature ovarian insufficiency (POI) model in mice and investigate the mechanism of injury. Methods Thirty-two 6~8-week-old female C57BL/6J mice were randomly divided into four groups (n=8 per group) using a weight-based block randomization method. The POI model was established via a single intraperitoneal injection of 75 mg/kg cyclophosphamide (CTX), 120 mg/kg CTX, 120 mg/kg CTX + 12 mg/kg Busulfan, or an equivalent volume of normal saline (control). Ovarian coefficients, serum estradiol (E2) and follicle-stimulating hormone (FSH) levels were measured. Western blotting was performed to assess changes in ovarian expression levels of NAD-dependent deacetylase sirtuin-5 (SIRT5) and forkhead box O3a (FOXO3a) under different modeling conditions. After determining the optimal CTX concentration for modeling, an additional forty 6~8-week-old femal C57BL/6J mice were randomly divided into five groups (n=8 per group) using a weight-based block randomization method: saline control, 120 mg/kg CTX sampling at 1, 2, 7, or 14 days after modeling. Western blotting was used to evaluate temporal changes of ovarian SIRT5 and FOXO3a protein expression. Results Compared with the saline control, all concentrations of CTX (75 mg/kg CTX, 120 mg/kg CTX) and 120 mg/kg CTX + 12 mg/kg Busulfan induced POI injury in mice. The 120 mg/kg CTX group exhibited smaller changes in ovarian coefficients (P<0.001) and E2 levels (P<0.05), whereas the 120 mg/kg CTX + 12 mg/kg Busulfan group showed rough and reduced luster fur, sluggish response and was in the worst state. Compared with the saline control group, FOXO3a expression was significantly down-regulated (P<0.05), while SIRT5 remained unchanged in the 75 mg/kg CTX group (P>0.05). In contrast, both SIRT5 (P<0.05) and FOXO3a (P<0.05) were significantly down-regulated in the 120 mg/kg CTX group. Further analysis revealed that on day 2 and 7 after 120 mg/kg CTX modeling, the expressions of SIRT5 (P<0.01) and FOXO3a (P<0.001) were significantly down-regulated, with the largest decrease observed on day 7 (SIRT5, P<0.000 1; FOXO3a, P<0.000 1). Conclusion Ovarian injury in the POI model induced by 120 mg/kg CTX is milder than that in the POI model induced by 75 mg/kg CTX. Moreover, the expression changes of SIRT5 and FOXO3a are most significant on day 7 after modeling induced by 120 mg/kg CTX, which may be related to the inhibition of the SIRT5-FOXO3a signaling pathway.

Key words: Cyclophosphamide, Premature ovarian insufficiency, Mouse model, SIRT5-FOXO3a pathway

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