PMID- 34785097 OWN - NLM STAT- MEDLINE DCOM- 20220411 LR - 20220411 IS - 1879-1166 (Electronic) IS - 0198-8859 (Linking) VI - 83 IP - 4 DP - 2022 Apr TI - Different immunoregulatory components at the decidua basalis of oocyte donation pregnancies. PG - 319-327 LID - S0198-8859(21)00253-6 [pii] LID - 10.1016/j.humimm.2021.10.008 [doi] AB - Oocyte donation (OD) pregnancies are characterized by more fetal-maternal human leukocyte antigen (HLA) mismatches compared with naturally conceived (NC) and in vitro fertilization (IVF) pregnancies. The maternal immune system has to cope with greater immunogenetic dissimilarity, but involved immunoregulation remains poorly understood. We examined whether the amount of regulatory T cells (Tregs) and immunoregulatory cytokines in decidua basalis of OD pregnancies differs from NC and IVF pregnancies. The cohort included 25 OD, 11 IVF and 16 NC placentas, maternal peripheral blood, and umbilical cord blood of uncomplicated pregnancies. Placenta slides were stained for FOXP3, IL-10, IL-6, gal-1, TGF-beta and Flt-1. Semi-quantitative (FOXP3+ Tregs) and computerized analysis (cytokines) were executed. The blood samples were typed for HLA class I and II to calculate fetal-maternal HLA mismatches. The percentage of Tregs was significantly higher in pregnancies with 4-6 HLA class I mismatches (n = 17), compared to 0-3 mismatches (n = 35; p = 0.04). Cytokine analysis showed significant differences between OD, IVF and NC pregnancies. Flt-1 was significantly lower in pregnancies with 4-6 HLA class I mismatches (p = 0.004), and in pregnancies with 6-10 HLA mismatches in total (p = 0.024). This study suggests that immunoregulation at the fetal-maternal interface in OD pregnancies with more fetal-maternal HLA mismatches is altered. CI - Copyright (c) 2021 The Authors. Published by Elsevier Inc. All rights reserved. FAU - van Bentem, Kim AU - van Bentem K AD - Department of Obstetrics and Gynecology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands. Electronic address: K.van_Bentem@lumc.nl. FAU - Bos, Manon AU - Bos M AD - Department of Obstetrics and Gynecology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands; Department of Pathology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands. FAU - van der Keur, Carin AU - van der Keur C AD - Department of Immunology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands. FAU - Kapsenberg, Hanneke AU - Kapsenberg H AD - Department of Immunology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands. FAU - Lashley, Eileen AU - Lashley E AD - Department of Obstetrics and Gynecology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands. FAU - Eikmans, Michael AU - Eikmans M AD - Department of Immunology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands. FAU - van der Hoorn, Marie-Louise AU - van der Hoorn ML AD - Department of Obstetrics and Gynecology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands. LA - eng PT - Journal Article DEP - 20211114 PL - United States TA - Hum Immunol JT - Human immunology JID - 8010936 RN - 0 (Cytokines) RN - 0 (Forkhead Transcription Factors) RN - 0 (HLA Antigens) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Histocompatibility Antigens Class II) SB - IM MH - Cytokines MH - Decidua MH - Female MH - Fertilization in Vitro MH - Forkhead Transcription Factors MH - *HLA Antigens MH - Histocompatibility Antigens Class I MH - Histocompatibility Antigens Class II MH - Humans MH - *Oocyte Donation MH - Pregnancy OTO - NOTNLM OT - Decidua basalis OT - HLA mismatches OT - Immunoregulatory cytokines OT - Oocyte donation pregnancy OT - Regulatory T cells COIS- Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2021/11/18 06:00 MHDA- 2022/04/12 06:00 CRDT- 2021/11/17 05:46 PHST- 2021/08/05 00:00 [received] PHST- 2021/10/08 00:00 [revised] PHST- 2021/10/31 00:00 [accepted] PHST- 2021/11/18 06:00 [pubmed] PHST- 2022/04/12 06:00 [medline] PHST- 2021/11/17 05:46 [entrez] AID - S0198-8859(21)00253-6 [pii] AID - 10.1016/j.humimm.2021.10.008 [doi] PST - ppublish SO - Hum Immunol. 2022 Apr;83(4):319-327. doi: 10.1016/j.humimm.2021.10.008. Epub 2021 Nov 14.