FU Xuemei,SUN Tianlin,SHI Meiying,et al.Effect of Qizi Yishen Lichong Decoction (七子益肾理冲汤) on Follicular Development of Polycystic Ovary Syndrome Model Rats based on Kisspeptin/GPR54 System[J].Journal of Traditional Chinese Medicine,2023,64(06):609-615.
FU Xuemei,SUN Tianlin,SHI Meiying,et al.Effect of Qizi Yishen Lichong Decoction (七子益肾理冲汤) on Follicular Development of Polycystic Ovary Syndrome Model Rats based on Kisspeptin/GPR54 System[J].Journal of Traditional Chinese Medicine,2023,64(06):609-615.DOI: 10.13288/j.11-2166/r.2023.06.012.
Effect of Qizi Yishen Lichong Decoction (七子益肾理冲汤) on Follicular Development of Polycystic Ovary Syndrome Model Rats based on Kisspeptin/GPR54 System
To explore the effect and the potential mechanism of
Qizi Yishen Lichong Decoction
(七子益肾理冲汤) on follicular development of polycystic ovary syndrome (PCOS).
Methods
2
Seventeen female SD rats with regular estrus were randomly divided into blank group (n=5), model group (n=6) and
Qizi
g
roup (n=6).
Rats in the model group and
Qizi
group were given 1 mg/(kg·d) of letrozole-carboxymethylcellulose suspension by gavage for 21 days to establish the model of PCOS. Since the 22nd day,
Qizi
group was given 34.02 g/(kg·d) of
Qizi Yishen Lichong Decoction,
one dose daily, while the blank group and model group were given 10 ml/(kg·d) of sterile drinking water by gavage. After 15 days, the rat weight and ovarian coefficient were compared. The appearance of the ovaries was observed with a stereo microscope. Histomorphological Changes of ovary in all groups of rats were observed by HE staining. The levels of serum follicle stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E
2
), testosterone (T), progesterone (P), anti-Müllerian hormone (AMH), and inhibin B (INHB) were detected by radioimmunoassay. The expression levels of kisspeptin (Kp), G protein-coupled receptor 54 (GPR54) and extracellular signal-regulated kinase 1/2 (ERK1/2) in hypothalamus and ovary were detected by Western blot.
Results
2
There was no significant difference in weight and ovarian coefficient of rats between the groups (
P
>0.05). Compared to thoese in the blank group, the ovaries of rats in the model group were paler in appearance, with cystic dilatation, increased follicles and atretic follicles, and thinning follicular granulosa cell layer; the serum FSH, LH, AMH levels, as well as the expression of Kp, GPR54, and ERK1/2 in hypothalamus and ovary increased (
P
<0.01), while the serum E
2
and P levels decreased (
P
<0.01). Compared to those in the the model group, the ovarian surface of rats in the
Qizi
group was more ruddy in appearance, with decreased number of cystic follicles and increased follicular granulosa cell layer, and near-mature follicles were found with a small amount of corpus luteum; the serum FSH, LH and AMH levels, and the expression of Kp and GPR54 in the hypothalamus and ovary significantly decreased, as well as the ERK1/2 in the hypothalamus (
P
<0.05 or
P
<0.01).
Conclusion
2
Qizi Yishen Lichong Decoction
can improve the follicular development of PCOS, and its mechanism may be related to the regulation of the downstream ERK signaling pathway by activating the Kp/GPR54 system, which further regulates the hypothalamus-pituitary-ovary axis and improves the sex hormones levels, playing the role in regulating ovarian function and promoting follicular development.
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