Protection of Zuoguiwan Against Apoptosis of Follicles in Rats Injured by 60Co-γ Rays： Based on PI3K/Akt/mTOR Signaling Pathway
10.13422/j.cnki.syfjx.20221894
- VernacularTitle:基于PI3K/Akt/mTOR信号通路探讨左归丸对60Co-γ射线损伤大鼠卵泡凋亡调控作用
- Author:
Fenqin ZHAO
1
;
Mingxia AN
1
;
Xiaonan DING
1
;
Jieying LIU
1
;
Yan ZHAO
1
;
Zhihui XIE
1
;
Shuping LI
2
Author Information
1. Gansu University of Chinese Medicine， Lanzhou 730000， China
2. Gansu Provincial Hospital， Lanzhou 730000， China
- Publication Type:Journal Article
- Keywords:
radiation damage;
premature ovarian failure （POF）;
Zuoguiwan;
terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling （TUNEL）;
phosphatidylinositol-3-kinases/protein kinase B/mammalian target of rapamycin （PI3K/Akt/mTOR） signaling pathway;
B-cell lymphoma-2;
Bcl-2-associated X protein
- From:
Chinese Journal of Experimental Traditional Medical Formulae
2022;28(18):12-19
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo investigate the protective effect of Zuoguiwan against 60Co-γ ray-induced premature aging of rats based on the phosphatidylinositol-3-kinases/protein kinase B/mammalian target of rapamycin （PI3K/Akt/mTOR） signaling pathway. MethodSixty sexually mature female SD rats were irradiated with 60Co-γ rays （6.0 Gy， LD40） for 24 h at one time. Then they were randomized into model group， Bujiale group （0.18 g·kg-1·d-1）， Bujiale （0.09 g·kg-1·d-1） + high-dose Zuoguiwan group （23.625 g·kg-1·d-1）， high-dose Zuoguiwan group （23.625 g·kg-1·d-1）， medium-dose Zuoguiwan group （9.45 g·kg-1·d-1）， and low-dose Zuoguiwan group （4.725 g·kg-1·d-1）. The administration （once a day） lasted 21 days. Serum indexes ［follicle-stimulating hormone （FSH）， luteinizing hormone （LH）， and estradiol （E2）］ of rats were detected by enzyme-linked immunosorbent assay （ELISA）， and morphological changes of ovarian tissues were observed based on hematoxylin and eosin （HE） staining. The apoptosis rate of granulosa cells was detected by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling （TUNEL） and the protein expression of phosphorylated （p）-PI3K， p-Akt， p-mTOR， B-cell lymphoma-2 （Bcl-2）， and Bcl-2-associated X protein （Bax） in ovarian tissues by Western blot. ResultCompared with normal group， model group demonstrated increase in serum FSH （P<0.01）， decrease in E2 （P<0.05）， and reduction of follicles and luteum in early ovary （P<0.01）. Moreover， the elevation of apoptosis rate of granulosa cells （P<0.01）， down-regulation of p-PI3K， p-Akt， p-mTOR， and Bcl-2 in ovarian tissue， and increase in expression of Bax were also observed in the model group as compared with the normal group （P<0.01）. In comparison with the model group， the administration groups showed rise of the number of early ovarian follicles， decrease in the apoptosis rate of granulosa cells， increase in the expression of p-PI3K， p-Akt， p-mTOR， and Bcl-2， and down-regulation of Bax， particularly the Bujiale + high-dose Zuoguiwan group（P<0.05，P<0.01）. ConclusionZuoguiwan protects radiation-damaged ovary by activating the expression of PI3K/Akt/mTOR protein in ovarian tissue， increasing Bcl-2， and inhibiting the expression of Bax.
