Mifepristone (RU486) inducing abortion in a mouse model by regulating innate and adaptive immune responses
| Title: | Mifepristone (RU486) inducing abortion in a mouse model by regulating innate and adaptive immune responses |
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| Authors: | Meng-Die Li, Yi-Fei Sang, Yun-Hui Tang, Ling Xu, Chun-Fang Xu, Da-Jin Li, Yan-Hong Li, Jian-Ping Zhang, Mei-Rong Du |
| Source: | Reproductive and Developmental Medicine, Vol 4, Iss 2, Pp 63-71 (2020) |
| Publisher Information: | Wolters Kluwer Health/LWW, 2020. |
| Publication Year: | 2020 |
| Collection: | LCC:Immunologic diseases. Allergy LCC:Diseases of the endocrine glands. Clinical endocrinology |
| Subject Terms: | decidual cd4+ t-cells, decidual macrophages, induced abortion, ru486, Immunologic diseases. Allergy, RC581-607, Diseases of the endocrine glands. Clinical endocrinology, RC648-665 |
| More Details: | Objective: Mifepristone (RU486), one of the most common medications for artificial abortion, attenuates the immunoregulatory effects of progesterone. However, the specific immune regulatory mechanism of RU486 in abortion remains unknown. We intended to investigate the immunomodulatory effects of RU486 on abortion. Methods: Sixty female mice were divided into the control group (0 mg RU486) and RU486 group (2 mg/kg RU486). The uterus, peripheral blood, and spleen were obtained for isolation of specific cell types. The population and phenotype of immune cells in the decidua, peripheral blood, and spleen were analyzed using flow cytometry. Statistical differences between groups were determined using two-tailed t- test. For all statistical tests, P < 0.05 was considered statistically significant. Results: RU486 effectively induced abortion in pregnant mice, with a significantly higher number of decidual macrophages (dMφ) (control group = 25.55% ± 2.467%, RU486 group = 19.41% ± 1.423%; P < 0.05), especially the major histocompatibility complex IIhigh subset. No difference in Mφ number was observed in the spleen or peripheral blood. Moreover, the dMφ from mice with RU486-induced abortion displayed a remarkable activated phenotype, with increased expressions of inducible nitric oxide synthase, tumor necrosis factor-α, and interleukin (IL)-12 but decreased expressions of arginase-1 and IL-10. We also found elevated levels of decidual CD4+ T-cells in the RU486 group that exhibited a higher level of the proinflammatory cytokine interferon-γ and a lower level of the anti-inflammatory cytokines, IL-4 and IL-10. Conclusions: We report a new mechanism of RU486-induced abortion via the regulation of innate cell Mφ activation and the adaptive response of CD4+ T-cells present in the decidua but not the periphery. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2096-2924 2589-8728 |
| Relation: | http://www.repdevmed.org/article.asp?issn=2096-2924;year=2020;volume=4;issue=2;spage=63;epage=71;aulast=Li; https://doaj.org/toc/2096-2924; https://doaj.org/toc/2589-8728 |
| DOI: | 10.4103/2096-2924.288021 |
| Access URL: | https://doaj.org/article/d0c1ebdbce164ae9b9db4f5b7dabedf2 |
| Accession Number: | edsdoj.0c1ebdbce164ae9b9db4f5b7dabedf2 |
| Database: | Directory of Open Access Journals |
| ISSN: | 20962924 25898728 |
|---|---|
| DOI: | 10.4103/2096-2924.288021 |
| Published in: | Reproductive and Developmental Medicine |
| Language: | English |