Effect of Bushen Yiqi Hexue Recipe (补肾益气和血方) on Pinopodes Expression on Endometrial Surface in Embryo Implantation Dysfunctional Mice

Objective: To explore the therapeutic mechanism of Bushen Yiqi Hexue recipe (补肾益气血方, BYHR), and observe its effect on pinopodes expression on endometrial surface in mifepristone induced embryo implantation dysfunctional mice. Methods: Pregnant Kunming mice were randomly divided into the normal group, the control group and the treated group. Mice in the treated group were administered with BYHR, and those in the normal group and the control group were administered with normal saline, starting from the very first day of pregnancy (Pd1). On the Pd4, mifepristone (RU486) was subcutaneously injected into mice in the control group and the treated group. Pinopodes expression on endometrial surface at 09:30-10:00 pm on Pd4 (regarded as time point 1, T1) and at 09:30-10:00 am on Pd5 (as time point 2, T2) was determined by scanning electron microscopy. Pregnancy rate and average implanted embryos were observed on Pd7. Results: Pregnancy rate and average implanted embryos in the control group were obviously lower than those in the normal group (all P<0.01), while the two parameters were significantly higher in the treated group (P<0.05, P<0.01, respectively) than those in the control group. In the normal group, abundant developing pinopodes were distributed over the whole endometrial surface in T1, and they were altered to a great deal of fully developed pinopodes in T2. But in the control group, only a few pinopodes were expressed locally on endometrial surface in T1, showing a nonsynchronous figure of development, and they completely disappeared in T2. In the treated group, a lot of developing pinopodes were expressed like those in the normal group but somewhat lagged behind, whereas many fully developed pinopodes were expressed in T2. Conclusion: The decrease of the pinopodes in T1 and the cleaning up of them in T2 is possibly the partial mechanism of mifepristone in inducing embryo implantation dysfunction. It is indicated that BYHR could improve pinopodes expression on endometrial surface, eventually better the uterine receptivity and improve the embryo implantation.

Local Immune Regulatory Effects of Bangdeyun on the Endometrium of Mice with Embryo Implantation Dysfunction during the Implantation Time

This study examined the effects of Bangdeyun on the expressions of nuclear factor-kappaB （NF-κB）, interferon-gamma （IFN-y） and interleukin-10 （IL-10） in the endometrium of mice with embryo implantation dysfunction （EID） during the implantation time （namely on pregnancy day 5, 6, 7 and 8） and explored the local immune regulatory effects of Bangdeyun. The gestational mice were randomly divided into normal group, model group and Bangdeyun-treated group. EID models of mice were established by using indomethacin. The endometrial expression of NF-κB was detected by immunohistochemistry and Western blotting. IFN-γ and IL-10 were measured by enzyme-linked immunosorbent assay （ELISA）. The results showed that in the normal group, NF-κB and IFN-γ were weakly expressed and IL-10 was strongly expressed in the endometrium during the whole implantation period. In the model group, the expressions of NF-κB and IFN-T were increased on pregnancy day 5, 6 and 7, and IL-10 expression decreased during the whole implantation time when compared with those in the normal group （P〈0.01 for all）. In the Bangdeyun-treated group, little amount of NF-κB and IFN-γ was expressed and IL-10 expression was strong, much the way they were expressed in the normal group （P〉0.05）. The expressions of NF-κB and IFN-T were much lower in the Bangdeyun-treated group than those in the model group on pregnancy day 5, 6 and 7 （P〈0.01 for all）, while the expression of IL-10 was much higher than in the model group during the whole implantation time （P〈0.01）. It was suggested Bangderun may favor a shift from Thl- to Th2-type immune response, therefore inhibiting the maternal immune rejection, inducing the immune tolerance and improving the fetal implantation.

DS147 Improves Pregnancy in Mice with Embryo Implantation Dysfunction Induced by Controlled Ovarian Stimulation

Summary： The study examined the effect of DS147, the bioactive component of the traditional herbal recipe Bangdeyun, on pregnancy in mice with embryo implantation dysfunction induced by controlled ovarian stimulation （COS）, and the underlying mechanisms. Female mice were superovulated by intrap eritoneal injection of 7.5 IU of pregnant mare serum gonadotropin （PMSG） followed by an additional injection of 7.5 IU hCG 48 h later to establish embryo implantation dysfunction （EID） model. Pregnant mice were randomly divided into normal control group, COS group and DS147-treated groups. The pregnancy rate and the average implantation site were obtained on pregnancy day 8 （PD8）. The side effect of 200 mg/kg of DS147 on naturally pregnant mice was also observed. Further, the uterine and ovarian tissue samples were collected on PD5 for measuring their weights, observing the development of the endometrium and ovary, and detecting the endometrial expression ofMMP-2, TIMP-2, CD34 and angiogenin （ANG）. The female mice treated with DS147 at doses of 100 to 800 mg/kg showed a higher pregnancy rate than those in COS group, and the highest pregnancy rate of 83.3% occurred in the 200 mg/kg DS147-treated group. Moreover, no obvious side effect was found in mice treated with 200 mg/kg DS147 on PD8 and PD16. The ovarian and uterine weights, and the expression levels of MMP-2, ANG and CD34 were significantly increased in DS147-treated groups when compared with COS group. The TIMP-2 expression level was much lower in DS147-treated mice than in COS mice and the ratio of MMP-2/TIMP-2 was much higher in DS147-treated group than in COS group, and even higher than normal control group. In all, these findings suggest that DS147 may improve pregnancy in mice with COS-induced EID by promoting matrix degradation and angiogenesis, and improving the development of corpus luteum and endometrial decidualization around the implantation window.

Effect of Bushenantai Recipe on the Expression of Endometrial LIF in Mice with Embryonic Implantation Dysfunction

In order to observe the effect of Bushenantai recipe on the expression of endometrial leukemia-inhibitory factor （LIF） in mice with embryonic implantation dysfunction （EID）, 120 Kunming mice post coition were randomized into three groups： normal control group, model group and traditional Chinese medicine group （TCM group） （n=40 in each group）. Uterus was collected on the pregnancy day （Pd） 4, 5, 6 after an intravenous injection of Evan＇s blue. The endometrium was dyed by Evan＇s blue and the mean points of response were observed on Pd 5. The expression of LIF mRNA and protein was detected by RT-PCR and immunohistochemistry respectively and analyzed statistically by image system. The results showed that the number of implantation sites in model group was remarkably less than in normal control group and TCM group. There was no significant difference between normal control group and TCM group. The expression of LIF mRNA and protein in model group was delayed. Bushenantai recipe could increase the expression of LIF mRNA and protein in endometria of mice with EID. It was suggested that Bushenantai recipe could improve embryo implantation of mice with EID by promoting the endometrial LIF expression and endometrial decidualization.

Effects of Acupuncture on Progesterone and Prolactin in Rats of Embryo Implantation Dysfunction

Objective： To investigate the effect of acupuncture on progesterone （P4） and prolactin （PRL） in rats of embryo implantation dysfunction （EID）. Methods： On the first day of pregnancy, 72 female Wistar rats were randomly allocated into the normal group, the EID model group, the acupuncture group and the P4 group （18 in each group）. The normal group was injected sesame oil, while the other three groups were given mifepristone to establish the EID model. The acupuncture group and the P4 group were given treatment of acupuncture and P4 injection, respectively. The serum of P4 and PRL were detected by radioimmunoassay, and the mRNA and protein expressions of P4 receptor （PR） and PRL receptor （PRLR） were detected using real-time polymerase chain reaction and immunohistochemical method, respectively. Results： Compared with the normal group, the serum levels of P4 and PRL as well as the mRNA and protein expression levels of PR and PRLR in the EID model group were significantly lowered （P〈0.01 or P〈0.05）. The above indices in the acupuncture group and the P4 group were significantly elevated compared with the EID model group （P〈0.01 or P〈0.05）. Conclusion： Acupuncture can promote embryo implantation effectively, which might be related to the effects of acupuncture on upregulating the P4 and PRL levels in serum and the PR and PRLR expression levels in rats.