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Postcoital administration of asoprisnil inhibited embryo implantation and disturbed ultrastructure of endometrium in implantation window in mice

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Summary

Asoprisnil, a member of the selective progesterone receptor modulators, exerts high progesterone receptor selectivity, endometrial targeted advantages and significant anti-implantation effect in rats. The purpose of this study was to confirm the anti-implantation effect of asoprisil, investigate the ultrastructural changes of the peri-implantation endometrium in mice and explore the effect of asoprisnil on endometrial receptivity and its targeted contraceptive proficiency. Post-coitus mice were administered with different dosages (0.2, 0.1, 0.05 mg·g−1·day−1) of asoprisnil from day 1 of pregnancy to day 3. Then 3 animals in each group were killed on day 5 of pregnancy, and uteri were collected to examine the ultrastructural changes of endometria under a transmission electron microscope (TEM). A total of 80 animals were sacrificed on day 8 of pregnancy, and the uterine horns were examined for the presence or absence of nidation sites and the number of implantation embryos. The results showed that the implantation rate and the average number of implantation embryos in asoprisnil groups were statistically significantly decreased as compared with the vehicle control group (P<0.05). The TEM results revealed that, in vehicle control group, the tight junction between the luminal epithelia cells was short and straight, the gap was wide; the luminal epithelia cells were covered with plenty of short, clavate and neatly arranged microvilli; the endometril stromal cells were large with plenty of cytoplasm, and showed significant decidual change; there was more than one nucleus in stromal cells, and the karyotheca was integrity. In low dosage and high dosage asoprisnil groups, the tight junction was longer and more curve than in the vehicle control group; microvilli were uneven and asymmetrically distributed in luminal epithelia; the stromal cells were small and the decidual change was not significant; there were karyopyknosis and karyolysis in stromal cells; there were abnormal thick-wall vessels in the endometrium. It was suggested that asoprisnil changed the ultrastructure of the endometrium in implantation window, disturbed the endometrial receptivity and finally resulted in embryo implantation failure.

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Authors and Affiliations

  1. The Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China

    Xiao-li Wu  (吴晓丽), Yi-hong Yang  (杨宜红), Xiao-li Shen  (沈小力) & Ping Su  (苏 萍)

  2. Department of Pharmacy, Wuhan Centre Hospital, Wuhan, 430030, China

    Zhi-hong Yu  (余志红)

  3. Department of Maternal and Child Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China

    Jun Qiu  (仇 君)

Authors
  1. Xiao-li Wu  (吴晓丽)
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  2. Zhi-hong Yu  (余志红)
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  3. Jun Qiu  (仇 君)
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  4. Yi-hong Yang  (杨宜红)
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  5. Xiao-li Shen  (沈小力)
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  6. Ping Su  (苏 萍)
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Correspondence to Ping Su  (苏 萍).

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Both authors contributed equally to this work.

This project was supported by Population and Family Planning Commission of Hubei Province, China (No. JS-2010004).

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Wu, Xl., Yu, Zh., Qiu, J. et al. Postcoital administration of asoprisnil inhibited embryo implantation and disturbed ultrastructure of endometrium in implantation window in mice. J. Huazhong Univ. Sci. Technol. [Med. Sci.] 33, 277–283 (2013). https://doi.org/10.1007/s11596-013-1111-1

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  • DOI: https://doi.org/10.1007/s11596-013-1111-1

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