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重庆医科大学 中医药学院,中医药防治代谢性疾病重庆市重点实验室,重庆 400016
魏小晶,硕士,从事生殖调控的研究,E-mail:1540201701@qq.com
段恒,博士,副教授,从事生殖调控的研究,E-mail:404634014@qq.com
收稿日期:2021-07-25,
网络出版日期:2021-10-27,
纸质出版日期:2022-01-05
移动端阅览
魏小晶,段恒,唐立明等.右归丸通过调节CXCL8/CXCR1/2信号通路及Ang-1,Ang-2表达促进大鼠卵巢血管生成的作用[J].中国实验方剂学杂志,2022,28(01):50-57.
WEI Xiao-jing,DUAN Heng,TANG Li-ming,et al.Youguiwan Regulates CXCL8/CXCR1/2 Signaling Pathway and Ang-1 and Ang-2 Expression to Promote Ovarian Angiogenesis in Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(01):50-57.
魏小晶,段恒,唐立明等.右归丸通过调节CXCL8/CXCR1/2信号通路及Ang-1,Ang-2表达促进大鼠卵巢血管生成的作用[J].中国实验方剂学杂志,2022,28(01):50-57. DOI: 10.13422/j.cnki.syfjx.20212406.
WEI Xiao-jing,DUAN Heng,TANG Li-ming,et al.Youguiwan Regulates CXCL8/CXCR1/2 Signaling Pathway and Ang-1 and Ang-2 Expression to Promote Ovarian Angiogenesis in Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(01):50-57. DOI: 10.13422/j.cnki.syfjx.20212406.
目的
2
研究补肾中药复方右归丸对自然衰老致卵巢功能低下的大鼠血管生成的影响与CXC趋化因子8(CXCL8)/趋化因子受体1/2(CXCR1/2)信号通路及血管生成素-1(Ang-1),血管生成素-2(Ang-2)的关系,探讨其改善卵巢功能的作用机制。
方法
2
将56只雌性SD大鼠随机分为青年组8只、自然衰老致卵巢功能低下的雌性大鼠模型组48只,青年组大鼠常规饲养,48只模型组大鼠常规饲养过程中做5~7 d阴道脱落细胞学涂片,将连续4个动情周期阴道细胞学表现为动情周期长、之后持续动情、反复假妊娠的大鼠作为初老大鼠,连续10 d表现为角化细胞指数高于50%的青年大鼠作为青年组。模型建立后,将存活造模大鼠随机分为初老空白组,结合雌激素组(65 μg·kg
-1
·d
-1
),左归丸组(33 g·kg
-1
·d
-1
),右归丸低、中、高剂量组(1.2,2.4,4.8 g·kg
-1
d
-1
),青年组和初老空白组以等体积生理盐水灌胃,持续30 d。实验结束后,苏木素-伊红(HE)染色法观察大鼠卵巢组织形态学变化;蛋白免疫印迹法(Western blot)检测大鼠卵巢组织中趋化因子CXCL8,CXCR1,CXCR2,Ang-1,Ang-2的蛋白表达水平;免疫组化标记大鼠卵巢组织中趋化因子CXCL8,CXCR1,CXCR2,Ang-1,Ang-2蛋白的表达;实时荧光定量聚合酶链式反应(Real-time PCR)检测大鼠卵巢组织中趋化因子CXCL8,CXCR1,CXCR2,Ang-1,Ang-2 mRNA表达。
结果
2
与青年组比较,初老空白组各级生长卵泡数、黄体数、血管数目数量少且闭锁卵泡多(
P
<
0.01),卵巢组织CXCL8,CXCR1及CXCR2水平蛋白和mRNA水平显著上升(
P
<
0.01),卵巢组织中Ang-1及Ang-2蛋白和mRNA水平明显下降(
P
<
0.05);与初老空白组相比,各用药组初老大鼠的各级生长卵泡数、黄体数、血管数目明显增加(
P
<
0.05),而闭锁卵泡数明显减少(
P
<
0.05),卵巢组织CXCL8,CXCR1及CXCR2水平蛋白和mRNA水平明显下降(
P
<
0.05),卵巢组织中Ang-1及Ang-2蛋白和mRNA水平明显上升(
P
<
0.05)。
结论
2
右归丸可以通过下调大鼠卵巢组织中CXCL8,CXCR1及CXCR2水平,上调Ang-1和Ang-2水平,促进卵巢血管生成,改善大鼠的卵巢功能。
Objective
2
To study the effects of Chinese herbal compound Youguiwan on angiogenesis of rats with ovarian dysfunction caused by natural aging and its relationship with chemokine interleukin 8 (CXCL8)/CXC chemokine receptor 1/2 (CXCR1/2) signaling pathway, angiopoietin 1 (Ang-1), and angiopoietin 2 (Ang-2), so as to explore its mechanism in improving the ovarian function.
Method
2
Fifty six female SD rats were randomly divided into the young control group (
n
=8) and modeling group (
n
=48, ovarian dysfunction caused by natural aging). Rats in both the young control and modeling groups were routinely fed, during which the ones in the modeling group underwent exfoliative cytology of vaginal smears for five to seven days. The ones presented with prolonged estrous cycle, followed by continuous estrus and repeated pseudopregnancy revealed by vaginal cytology during four consecutive estrous cycles indicated early aging, and the young rats with keratinocyte proliferation index higher than 50% for 10 consecutive days were classified into the young control group. The successfully modeled rats were randomly divided into the early-aged group, estrogen (65 μg·kg
-1
·d
-1
) group, Zuoguiwan (33 g·kg
-1
·d
-1
) group, as well as the low-, medium-, and high-dose (1.2, 2.4, 4.8 g·kg
-1
·d
-1
) Youguiwan groups. Rats in the young control group and the early-aged group were gavaged with the same volume of normal saline for 30 days. After the experiment, the morphological changes in rat ovary were observed by hematoxylin-eosin (HE) staining. The protein expression levels of chemokines CXCL8, CXCR1, CXCR2, Ang-1, and Ang-2 in rat ovary were detected by Western blotting and immunohistochemistry, and the mRNA expression levels of CXCL8, CXCR1, CXCR2, Ang-1, and Ang-2 by real-time fluorescence quantitative polymerase chain reaction (Real-time PCR).
Result
2
Compared with the young control group, the early-aged group exhibited reduced number of growing follicles, corpus luteum, and blood vessels at all levels, elevated atretic follicles (
P
<
0.01), up-regulated protein and mRNA expression of CXCL8, CXCR1, and CXCR2 in the ovarian tissue (
P
<
0.01), and down-regulated Ang-1 and Ang-2 protein and mRNA expression (
P
<
0.05). Compared with the early-aged group, each medication remarkably increased the number of growing follicles, corpus luteum, and blood vessels (
P
<
0.05), lowered the number of atretic follicles (
P
<
0.05), down-regulated the protein and mRNA expression levels of CXCL8, CXCR1, and CXCR2 in the ovarian tissue (
P
<
0.05), and up-regulated the protein and mRNA expression levels of Ang-1 and Ang-2 (
P
<
0.05).
Conclusion
2
Youguiwan down-regulates the levels of CXCL8, CXCR1, and CXCR2 in rat ovary and up-regulates the levels of Ang-1 and Ang-2 to promote ovarian angiogenesis and improve rat ovarian function.
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