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.
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.
Youguiwan Regulates CXCL8/CXCR1/2 Signaling Pathway and Ang-1 and Ang-2 Expression to Promote Ovarian Angiogenesis in Rats
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.
FU J L , HSIAO K Y , LEE H C , et al . Suppression of COUP-TFⅡ upregulates angiogenin and promotes angiogenesis in endometriosis [J]. Hum Reprod , 2018 , 33 ( 8 ): 1517 - 1527 .
TOBIN R P , JORDAN K R , KAPOOR P , et al . IL-6 and IL-8 are linked with myeloid-derived suppressor cell accumulation and correlate with poor clinical outcomes in melanoma patients [J]. Front Oncol , 2019 , doi: 10.3389/fonc.2019.01223 http://dx.doi.org/10.3389/fonc.2019.01223 .
PETREACA M L , YAO M , LIU Y , et al . Transactivation of vascular endothelial growth factor receptor-2 by interleukin-8 (IL-8/CXCL8) is required for IL-8/CXCL8-induced endothelial permeability [J]. Mol Biol Cell , 2007 , 18 ( 12 ): 5014 - 5023 .
MARTIN D , GALISTEO R , GUTKIND J , et al . CXCL8/IL8 stimulates vascular endothelial growth factor (VEGF) expression and the autocrine activation of VEGFR2 in endothelial cells by activating NF- κ B through the CBM (Carma3/Bcl10/Malt1) complex [J]. J Biol Chem , 2009 , 284 ( 10 ): 6038 - 6042 .
LIU J , HU H H , LEE M H , et al . Serum levels of M2BPGi as short-term predictors of hepatocellular carcinoma in untreated chronic hepatitis B patients [J]. Sci Rep , 2017 , 7 ( 1 ): 97 - 107 .
SHIRAZI S H , GARGARI B P , IZADI A , et al . Effect of Vitamin E on serum levels of vascular endothelial growth factor and angiopoietin-1 in women with Polycystic ovary syndrome:a pilot randomized,placebo-controlled trial [J]. Int J Fertil , 2021 , 15 ( 1 ): 44 - 50 .