FasL on decidual macrophages mediates trophoblast apoptosis: A potential cause of recurrent miscarriage

Ding,Jinli; Yin,Tailang; Yan,Nana; Cheng,Yanxiang; Yang,Jing

doi:10.3892/ijmm.2019.4146

FasL on decidual macrophages mediates trophoblast apoptosis: A potential cause of recurrent miscarriage

Authors:
- Jinli Ding
- Tailang Yin
- Nana Yan
- Yanxiang Cheng
- Jing Yang
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Affiliations: Reproductive Medical Center, Renmin Hospital of Wuhan University and Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, Hubei 430060, P.R. China, Yichang Central People's Hospital, Yichang, Hubei 443000, P.R. China, Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
Published online on: March 26, 2019 https://doi.org/10.3892/ijmm.2019.4146
Pages: 2376-2386
Copyright: © Ding et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Macrophages can induce Fas ligand (FasL)‑mediated apoptosis, and the deregulation of apoptosis is known to be associated with recurrent miscarriage (RM). The aim of the present study was to investigate the possible involvement of FasL in macrophage‑mediated trophoblast apoptosis and its potential role in RM. Human decidual and placental villous tissues were collected from 81 women (21 for the RM group, 26 for the spontaneous abortion group and 34 for the control group) at 7‑9 weeks of gestation. The distribution changes of macrophages and the expression of FasL on macrophages were evaluated by immunohistochemical, immunofluorescence and western blot analyses. A macrophage and trophoblast co‑culture model was used to determine the effects of FasL on the apoptosis of trophoblasts. The results indicated that CD86+ macrophage populations in decidual tissues were significantly increased, accompanied by reduced CD163+ macrophages in the abortion and RM groups. Furthermore, the distribution of CD68+ macrophages was also significantly altered in specimens from the abortion and RM groups, and they were observed to have infiltrated into the trophoblast cells. In addition, elevated expression of FasL on CD68+ and CD86+ macrophages in the decidua was observed in the spontaneous abortion and RM groups of patients, and FasL was demonstrated to mediate the induction of trophoblast apoptosis by macrophages in co‑culture. These results indicate that the aberration of macrophage‑induced FasL‑mediated apoptosis may represent one of the causes of RM.

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