1.广西中医药大学,南宁 530000
2.广西中医药大学 附属瑞康医院,南宁 530000
李钟彤,在读硕士,从事中医药治疗妇科疾病临床基础研究,E-mail:384208047@qq.com
张亚萍,博士,教授,从事中西医结合防治妇科疾病研究,E-mail:1067545641@qq.com
收稿:2024-06-19,
录用:2024-09-18,
网络出版:2024-09-20,
纸质出版:2025-04-05
移动端阅览
李钟彤,张亚萍,游琛等.基于Keap1/Nrf2/HO-1信号通路探讨滋肾调肝方对卵巢储备功能下降模型大鼠的影响[J].中国实验方剂学杂志,2025,31(07):72-80.
LI Zhongtong,ZHANG Yaping,YOU Chen,et al.Zishen Tiaogan Prescription Treats Diminished Ovarian Reserve in Rats via Keap1/Nrf2/HO-1 Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2025,31(07):72-80.
李钟彤,张亚萍,游琛等.基于Keap1/Nrf2/HO-1信号通路探讨滋肾调肝方对卵巢储备功能下降模型大鼠的影响[J].中国实验方剂学杂志,2025,31(07):72-80. DOI: 10.13422/j.cnki.syfjx.20241539.
LI Zhongtong,ZHANG Yaping,YOU Chen,et al.Zishen Tiaogan Prescription Treats Diminished Ovarian Reserve in Rats via Keap1/Nrf2/HO-1 Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2025,31(07):72-80. DOI: 10.13422/j.cnki.syfjx.20241539.
目的
2
观察滋肾调肝方改善卵巢储备功能下降(DOR)模型大鼠氧化应激损伤的作用,并探讨Kelch样ECH关联蛋白1(Keap1)/核因子E
2
相关因子2(Nrf2)/血红素氧合酶-1(HO-1)信号通路在其中的作用机制。
方法
2
将48只雌性SD大鼠随机分为正常组12只,造模组36只,造模组大鼠连续每日皮下注射半乳糖(350 mg·kg
-1
)联合制动应激法建立模型,造模28 d后将正常组和造模组各处死6只验证模型。模型验证成功后,将造模组分为模型组,戊酸雌二醇(0.09 mg·kg
-1
)组和滋肾调肝方低、中、高剂量(6.39、12.78、25.56 g·kg
-1
)组,以6只/组进行相应干预,持续4周。苏木素-伊红(HE)染色法观察大鼠动情周期及卵巢病理形态学变化,计算大鼠卵巢脏器指数;酶联免疫吸附测定法(ELISA)检测血清中性激素及氧化应激相关指标的变化;蛋白免疫印迹法(Western blot)和实时荧光定量聚合酶链式反应(Real-time PCR)检测卵巢组织中Nrf2、Keap1、HO-1蛋白及mRNA表达情况;免疫组化(IHC)检测卵巢组织中超氧化物歧化酶2(SOD2)蛋白的阳性表达。
结果
2
与正常组比较,模型组大鼠卵巢中生长卵泡明显减少、卵泡颗粒层排列松散;大鼠卵巢指数和血清抗缪勒管激素(AMH)、雌二醇(E
2
)水平显著下降,黄体生成素(LH)、促卵泡生成素(FSH)水平均显著升高(
P
<
0.01);超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和还原型谷胱甘肽(GSH)水平显著下降(
P
<
0.01),丙二醛(MDA)水平显著升高(
P
<
0.01),卵巢组织中Keap1蛋白及mRNA表达显著增加(
P
<
0.01),Nrf2、HO-1蛋白表达显著减少(
P
<
0.01),Nrf2 mRNA表达明显降低(
P
<
0.05),HO-1 mRNA表达显著下降(
P
<
0.01),SOD2蛋白阳性表达显著减少(
P
<
0.01);与模型组比较,戊酸雌二醇组及滋肾调肝方低、中、高剂量组卵巢指数均明显增加(
P
<
0.05,
P
<
0.01),血清中AMH、E
2
水平显著升高(
P
<
0.01),FSH、LH水平显著降低(
P
<
0.01);卵巢内生长卵泡数量增多,血清中SOD活性增强,CAT活力升高,GSH含量增加,MDA含量减少(
P
<
0.05,
P
<
0.01);卵巢组织中Keap1蛋白及mRNA表达显著减少(
P
<
0.01),Nrf2蛋白表达显著增加(
P
<
0.01),HO-1蛋白表达水平明显升高(
P
<
0.05,
P
<
0.01),Nrf2、HO-1 mRNA表达水平显著上调(
P
<
0.01),SOD2蛋白的阳性表达显著增加(
P
<
0.01)。
结论
2
滋肾调肝方能够调节血清激素水平,降低Keap1的表达水平,上调卵巢组织中Nrf2、HO-1、SOD2因子的表达,增强DOR大鼠卵巢的抗氧化能力,减轻卵巢过氧化损伤,改善卵巢储备功能,其机制可能与Keap1/Nrf2/HO-1通路相关。
Objective
2
To observe the effect of Zishen Tiaogan prescription on the oxidative stress injury in the rat model of diminished ovarian reserve (DOR) and explore the role of the Kelch-like ECH-associated protein 1 (Keap1)/nuclear factor E
2
-related factor 2 (Nrf2)/heme oxygenase-1 (HO-1) signaling pathway.
Methods
2
Forty-eight female SD rats were randomly assigned into a normal group (
n
=12) and a modeling group (
n
=36). The rats in the modeling group received subcutaneous injection of galactose (350 mg·kg
-1
) combined with immobilization stress daily. After 28 days of modeling, 6 rats in the normal group and 6 rats in the modeling group were sacrificed to examine the modeling results. The successfully modeled rats were assigned into model, estradiol valerate (0.09 mg·kg
-1
), and low-, medium-, and high-dose (6.39, 12.78, 25.56 g·kg
-1
, respectively) Zishen Tiaogan prescription groups. The intervention lasted for 4 weeks with 6 animals per group. Hematoxylin-eosin staining was used to observe the estrous cycle and the pathological changes in the ovarian tissue. The ovarian index was calculated. Enzyme-linked immunosorbent assay was employed to measure the serum levels of sex hormones and oxidative stress-related indexes. Western blot and real-time PCR were employed to determine the protein and mRNA levels, respectively, of Nrf2, Keap1 and HO-1 in the ovarian tissue. The positive expression of superoxide dismutase 2 (SOD2) in the ovarian tissue was detected by immunohistochemistry (IHC).
Results
2
Compared with the normal group, the model group showed reduced follicles in the ovary, loose arrangement of the follicle granule layer, declined levels of anti-Mullerian hormone (AMH) and estradiol (E
2
) in the serum, elevated levels of luteinizing hormone (LH) and follicle-stimu
lating hormone (FSH) (
P
<
0.01), lowered levels of superoxide dismutase (SOD), catalase (CAT), and glutathione (GSH) (
P
<
0.01), and increased accumulation of malondialdehyde (MDA) (
P
<
0.01). In addition, the modeling led to up-regulated protein and mRNA levels of Keap1 (
P
<
0.01), the expression of Nrf2 and HO-1 protein was significantly decreased (
P
<
0.01), the mRNA expression of Nrf2 was significantly decreased (
P
<
0.05), the mRNA expression of HO-1 was significantly decreased (
P
<
0.01), in the ovarian tissue. Compared with model group, the estradiol valerate and low-, medium-, and high-dose Zishen Tiaogan prescription groups showed increases in the ovarian index (
P
<
0.01) and serum E
2
and AMH levels (
P
<
0.01), declined levels of FSH and LH (
P
<
0.01), increased follicles in the ovary, elevated levels of SOD, CAT, and GSH, and reduced accumulation of MDA (
P
<
0.05,
P
<
0.01). Furthermore, these groups showcased down-regulated protein and mRNA levels of Keap1 (
P
<
0.01), the expression of Nrf2 protein was significantly increased (
P
<
0.01), the expression level of HO-1 protein was increased (
P
<
0.05,
P
<
0.01), and increased positive expression of SOD2 (
P
<
0.01).
Conclusion
2
Zishen Tiaogan prescription can regulate the serum levels of hormones, down-regulate the expression of Keap1, up-regulate the expression of Nrf2, HO-1, and SOD2, enhance the antioxidant capacity, and reduce the peroxidation damage in the ovarian tissue to improve the ovarian reserve function in the rat model of DOR. High-dose Zishen Tiaogan prescription demonstrated the best effect and the mechanism is associated with the regulation of the Keap1/Nrf2/HO-1 pathway.
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