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Bhattarai A, Shah S, Dahal K, Neupane R, Thapa S, Neupane N, Barboza JJ, Shrestha A, Sah R, Apostolopoulos V. Biomarker role of maternal soluble human leukocyte antigen G in pre-eclampsia: A meta-analysis. Immun Inflamm Dis 2024; 12:e1254. [PMID: 38639563 PMCID: PMC11027746 DOI: 10.1002/iid3.1254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/26/2024] [Accepted: 04/04/2024] [Indexed: 04/20/2024] Open
Abstract
INTRODUCTION Human leukocyte antigen-G (HLA-G) is a non-classical class I HLA molecule shown to regulate the immunomodulation of maternal immune cells to prevent fetal tissue destruction. Low levels of freely circulating maternal soluble HLA-G (sHLA-G) have been observed in pre-eclampsia, however, no pooled evidence exists. This meta-analysis aimed to generate pooled findings on the association of sHLA-G levels with pre-eclampsia and is the first study to perform a trimester-wise comparison of the levels of sHLA-G in preeclamptic cases and normal pregnant controls. METHODS The databases PubMed, Emba, Web of Science, and Google Scholar through May 31, 2023. Preeclamptic women were defined as cases and normal pregnancies as controls. Data on the level of sHLA-G in cases and controls was extracted and subjected to a meta-analysis using a random-effects model. The pooled effect was expressed in terms of standardized mean difference (SMD). Sensitivity analysis was performed to investigate the effect of the exclusion of each study on the pooled results. Publication bias was assessed statistically. RESULTS Nine studies with altogether 567 PE cases and 1132 normal pregnancy controls were included in the meta-analysis. The first and third trimester levels of sHLA-G in PE cases were significantly lower than that of normal pregnant controls: (SMD: -0.84 [-1.29; -0.38]; p = .003; I2 = 54%) and (SMD: -0.39 [-0.71; -0.06]; p = .02; I2 = 79%) respectively. Sensitivity analysis revealed significant fluctuations in the pooled findings when few studies were excluded, raising questions on the consistency of results among studies. CONCLUSION Although we found that first and third-trimester sHLA-G levels in pre-eclampsia are significantly lower, taking into consideration the inconsistent results from the sensitivity analysis, our findings advocate the demand for more studies with larger sample sizes to generate solid ground pooled evidence on the predictive role of sHLA-G in pre-eclampsia.
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Affiliation(s)
| | - Sangam Shah
- Institute of MedicineTribhuvan UniversityMaharajgunjNepal
| | - Krishna Dahal
- Institute of MedicineTribhuvan UniversityMaharajgunjNepal
| | - Raksha Neupane
- Institute of MedicineTribhuvan UniversityMaharajgunjNepal
| | - Sangharsha Thapa
- Department of NeurologyWestchester Medical CenterValhallaNew YorkUSA
| | | | | | | | - Ranjit Sah
- Department of MicrobiologyTribhuvan University Teaching Hospital, Institute of MedicineKathmanduNepal
- Department of MicrobiologyDr. D. Y. Patil Medical College, Hospital and Research Centre, Dr. D. Y. Patil VidyapeethPuneIndia
- Department of Public Health DentistryDr. D.Y. Patil Dental College and Hospital, Dr. D.Y. Patil VidyapeethPuneIndia
| | - Vasso Apostolopoulos
- Institute for Health and Sport, Immunology and Translational ResearchVictoria UniversityMelbourneVictoriaAustralia
- Australian Institute for Musculoskeletal Science, Immunology ProgramMelbourneVictoriaAustralia
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Mao J, Feng Y, Zhu X, Ma F. The Molecular Mechanisms of HLA-G Regulatory Function on Immune Cells during Early Pregnancy. Biomolecules 2023; 13:1213. [PMID: 37627278 PMCID: PMC10452754 DOI: 10.3390/biom13081213] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 08/01/2023] [Accepted: 08/01/2023] [Indexed: 08/27/2023] Open
Abstract
Human leukocyte antigen-G (HLA-G) is a non-classical human major histocompatibility complex (MHC-I) molecule with the membrane-bound and soluble types. HLA-G is primarily expressed by extravillous cytotrophoblast cells located at the maternal-fetal interface during pregnancy and is essential in establishing immune tolerance. This review provides a comprehensive understanding of the multiple molecular mechanisms by which HLA-G regulates the immune function of NK cells. It highlights that HLA-G binds to microRNA to suppress NK cell cytotoxicity and stimulate the secretion of growth factors to support fetal growth. The interactions between HLA-G and NK cells also activate senescence signaling, promoting spiral artery remodeling and maintaining the balance of maternal-fetal immune responses. In addition, HLA-G can inhibit the function of decidual T cells, dendritic cells, and macrophages. Overall, the interaction between trophoblast cells and immune cells mediated by HLA-G plays a crucial role in understanding immune regulation at the maternal-fetal interface and offers insights into potential treatments for pregnancy-related diseases.
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Affiliation(s)
- Jia Mao
- Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, China;
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, State Key Laboratory of Biotherapy and Cancer Center, College of Life Sciences, Sichuan University, Chengdu 610064, China
| | - Ying Feng
- Department of Histology, Embryology and Neurobiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610041, China;
| | - Xiaofeng Zhu
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, State Key Laboratory of Biotherapy and Cancer Center, College of Life Sciences, Sichuan University, Chengdu 610064, China
| | - Fang Ma
- Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, China;
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
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Barbaro G, Inversetti A, Cristodoro M, Ticconi C, Scambia G, Di Simone N. HLA-G and Recurrent Pregnancy Loss. Int J Mol Sci 2023; 24:ijms24032557. [PMID: 36768880 PMCID: PMC9917226 DOI: 10.3390/ijms24032557] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/16/2023] [Accepted: 01/25/2023] [Indexed: 01/31/2023] Open
Abstract
Placentation is an immunological compromise where maternal immune system cells and trophoblastic cells interact to reach an equilibrium condition. Although the cross talk between the two systems is complex and not completely understood, Human Leukocyte Antigen G (HLA-G), expressed on trophoblastic cell surfaces, seems to be one of the main molecules involved in the modulation of both local and systemic maternal immune response. The prevalence of recurrent pregnancy loss (RPL), probably underestimated, is 5% of all women who achieve pregnancy, and about 40-60% percent of RPL cases are unexplained. There is an immunological analogy between allograft rejection and miscarriage, and the purpose of this review is to describe how the HLA-G pathway alterations are involved in disrupting the immunologic balance and in increasing the risk of recurrent pregnancy loss.
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Affiliation(s)
- Greta Barbaro
- Dipartimento di Scienze della Salute della Donna, del Bambino e di Sanità Pubblica, Fondazione Policlinico Universitario A. Gemelli, Istituto di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.), L. go A. Gemelli 8, 00168 Roma, Italy
| | - Annalisa Inversetti
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, Pieve Emanuele, 20072 Milano, Italy
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
| | - Martina Cristodoro
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, Pieve Emanuele, 20072 Milano, Italy
| | - Carlo Ticconi
- Dipartimento di Scienze Chirurgiche, Ginecologia e Ostetricia, Università di Torvergata, 00168 Roma, Italy
| | - Giovanni Scambia
- Dipartimento di Scienze della Salute della Donna, del Bambino e di Sanità Pubblica, Fondazione Policlinico Universitario A. Gemelli, Istituto di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.), L. go A. Gemelli 8, 00168 Roma, Italy
- U.O.C. di Ginecologia Oncologica, Fondazione Policlinico Universitario A. Gemelli IRCCS, L. go A. Gemelli 8, 00168 Rome, Italy
| | - Nicoletta Di Simone
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, Pieve Emanuele, 20072 Milano, Italy
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Italy
- Correspondence:
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Hu L, He D, Zeng H. Association of parental HLA-G polymorphisms with soluble HLA-G expressions and their roles on recurrent implantation failure: A systematic review and meta-analysis. Front Immunol 2022; 13:988370. [PMID: 36532068 PMCID: PMC9751038 DOI: 10.3389/fimmu.2022.988370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 11/14/2022] [Indexed: 12/04/2022] Open
Abstract
Introduction HLA-G plays a central role in immune tolerance at the maternal-fetal interface. The HLA-G gene is characterized by low allelic polymorphism and restricted tissue expression compared with classical HLA genes. HLA-G polymorphism is associated with HLA-G expression and linked to pregnancy complications. However, the association of parental HLA-G polymorphisms with soluble HLA-G (sHLA-G) expression and their roles in recurrent implantation failure (RIF) is unclear. The study aims to systematically review the association of HLA-G polymorphisms with RIF, the association of sHLA-G expression with RIF, and the association of HLA-G polymorphisms with sHLA-G expressions in patients attending in-vitro fertilization (IVF) treatment. Methods Studies that evaluated the association of HLA-G polymorphisms with RIF, the association between sHLA-G expression with RIF, and the association between HLA-G polymorphisms with sHLA-G expressions in patients attending IVF treatment were included. Meta-analysis was performed by random-effect models. Sensitivity analysis was performed by excluding one study each time. Subgroup analysis was performed based on ethnicity. Results HLA-G 14bp ins variant is associated with a lower expression of sHLA-G in seminal or blood plasma of couples attending IVF treatment. The maternal HLA-G*010101 and paternal HLA-G*010102 alleles are associated with RIF risk compared to other alleles. However, single maternal HLA-G 14bp ins/del polymorphism, HLA-G -725 C>G/T polymorphism, or circulating sHLA-G concentration was not significantly associated with RIF in the general population. HLA-G 14bp ins/ins homozygous genotype or ins variant was associated with a higher risk of RIF in the Caucasian population. Discussion Specific HLA-G alleles or HLA-G polymorphisms are associated with sHLA-G expression in couples attending IVF treatment. Several HLA-G polymorphisms may be related to RIF, considering different ethnic backgrounds. A combined genetic effect should be considered in future studies to confirm the association of HLA-G polymorphisms and sHLA-G expressions in relation to RIF.
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Affiliation(s)
- Lian Hu
- Department of Gynecology and Obstetrics, The Fourth Changsha Hospital, Changsha, China
| | - Dongmei He
- Department of Gynecology and Obstetrics, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Hong Zeng
- Department of Reproductive Medicine Center, Foshan Maternal and Child Health Care Hospital, Southern Medical University, Guangzhou, China,Department of Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China,*Correspondence: Hong Zeng,
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Krop J, Van Der Keur C, Kapsenberg JM, Den Hollander F, Van Der Hoorn MLP, Heidt S, Claas FHJ, Eikmans M. Soluble HLA-G blood levels are not increased during ongoing pregnancy in women with a history of recurrent pregnancy loss. J Reprod Immunol 2022; 153:103665. [PMID: 35905658 DOI: 10.1016/j.jri.2022.103665] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 05/30/2022] [Accepted: 07/11/2022] [Indexed: 11/30/2022]
Abstract
Recurrent pregnancy loss (RPL) affects 1-2 % of couples who are trying to conceive. At some point, some couples do maintain a healthy pregnancy to term, but the underlying mechanism of RPL remains elusive. Human leukocyte antigen (HLA)-G is an immune modulatory molecule. Our group previously showed increased HLA-G levels in the decidua of term pregnancies after RPL, while other studies showed reduced soluble HLA-G (sHLA-G) blood levels in women with RPL. This led us to investigate sHLA-G levels in blood of women with RPL who had either a subsequent pregnancy loss (RPL-pregnancy loss) or a healthy term pregnancy (RPL-live birth), and compare these to healthy control pregnancies and non-pregnant controls. Soluble HLA-G concentrations were quantified by ELISA. Women with healthy term pregnancy had increased sHLA-G levels compared to non-pregnant controls. In contrast, RPL-live birth women at term did not have increased blood sHLA-G levels. Soluble HLA-G levels remained stable between first and third trimester. Interestingly, when comparing first trimester samples of RPL-live birth to RPL-pregnancy loss, sHLA-G levels also did not significantly differ. High sHLA-G levels in blood seem not to be crucial for an ongoing healthy pregnancy after RPL. However, since it was previously shown that women with RPL-live birth have increased HLA-G levels in term decidua compared to control pregnancies, the current data suggest that local and systemic immune regulation are not necessarily in concert. Further study of the contribution of fetus-derived HLA-G and HLA-G of maternal origin may provide more insight in the pathophysiology of RPL.
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Affiliation(s)
- J Krop
- Department of Immunology, Leiden University Medical Centre, Leiden, the Netherlands
| | - C Van Der Keur
- Department of Immunology, Leiden University Medical Centre, Leiden, the Netherlands
| | - J M Kapsenberg
- Department of Immunology, Leiden University Medical Centre, Leiden, the Netherlands
| | - F Den Hollander
- Department of Immunology, Leiden University Medical Centre, Leiden, the Netherlands
| | - M L P Van Der Hoorn
- Department of Obstetrics, Leiden University Medical Centre, Leiden, the Netherlands
| | - S Heidt
- Department of Immunology, Leiden University Medical Centre, Leiden, the Netherlands
| | - F H J Claas
- Department of Immunology, Leiden University Medical Centre, Leiden, the Netherlands
| | - M Eikmans
- Department of Immunology, Leiden University Medical Centre, Leiden, the Netherlands.
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Sehgal S, Vyawhare S, Bhatnagar S, Kshetrapal P. Longitudinal profile of sHLA-G during pregnancy and its association with small for gestational age births in North Indian pregnant females: A nested case-control study. Am J Reprod Immunol 2021; 87:e13504. [PMID: 34657322 DOI: 10.1111/aji.13504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 08/06/2021] [Accepted: 10/11/2021] [Indexed: 12/01/2022] Open
Abstract
PROBLEM Small for gestational age (SGA) neonates are vulnerable to various long and short-term adverse health consequences. The expression of HLA-G in the placenta is crucial for establishment and maintenance of pregnancy. Its aberrant expression could lead to perturbed immunological interactions in the placenta which could be associated with SGA births. The objective of this study was to assess the difference in the trajectories of soluble HLA-G in maternal sera during pregnancy between women delivering SGA and appropriate for gestational age (AGA) neonates. METHOD OF STUDY Soluble HLA-G was estimated in the maternal sera collected at different time points in pregnancy of North-Indian pregnant females delivering SGA (N = 23) or AGA (N = 17) neonates using sandwich ELISA. Linear mixed models were built and compared to study the association between sHLA-G levels during pregnancy and SGA births. RESULTS No significant difference was observed in the sHLA-G trajectories during pregnancy in mothers delivering SGA as compared to those delivering AGA (P-value = .5677). A trend towards higher sHLA-G levels at the first trimester of pregnancy (< 14 weeks of gestation) was observed in mothers delivering SGA neonates (Median = 41.71, IQR = 21.31-71.38) as compared to those delivering AGA neonates (Median = 37.58, IQR = 19.05-73.57). CONCLUSION During pregnancy, sHLA-G trajectories do not differ significantly between mothers delivering SGA and those delivering AGA neonates. However, sHLA-G trends towards higher levels during early pregnancy in mothers delivering SGA neonates.
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Affiliation(s)
- Shilpi Sehgal
- Maternal and Child Health, Translational Health Science and Technology Institute, Haryana, India.,Manipal Academy of Higher Education, Karnataka, India
| | - Sushrut Vyawhare
- Maternal and Child Health, Translational Health Science and Technology Institute, Haryana, India
| | - Shinjini Bhatnagar
- Maternal and Child Health, Translational Health Science and Technology Institute, Haryana, India
| | - Pallavi Kshetrapal
- Maternal and Child Health, Translational Health Science and Technology Institute, Haryana, India
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- Maternal and Child Health, Translational Health Science and Technology Institute, Haryana, India.,Interdisciplinary Group for Advanced Research on Birth Outcomes - DBT India Initiative, Translational Health Science and Technology Institute, Faridabad, India
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Persson G, Stæhr CS, Klok FS, Lebech M, Hviid TVF. Evidence for a shift in placental HLA-G allelic dominance and the HLA-G isoform profile during a healthy pregnancy and pre-eclampsia. Biol Reprod 2021; 105:846-858. [PMID: 34159362 DOI: 10.1093/biolre/ioab121] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 06/08/2021] [Accepted: 06/15/2021] [Indexed: 11/12/2022] Open
Abstract
Human leukocyte antigen (HLA)-G is a non-classical class Ib major expressed by placental trophoblast cells plays a central role in establishing tolerance to the semi-allogeneic fetus and in placentation. HLA-G exists in different soluble or membrane-bound isoforms. Pre-eclampsia, a major cause of fetal and maternal morbidity and mortality, has been linked to insufficient placentation and an altered immune response in pregnancy, including altered HLA-G expression. The 14 bp insertion/deletion polymorphism in the 3' untranslated region of the gene and the isoform profile may affect HLA-G expression. The aim of the current pilot study was to characterize the expression patterns of HLAG mRNA, protein and isoform profile in uncomplicated term pregnancies and in cases of pre-eclampsia. Maternal sHLA-G mRNA and protein levels was slightly reduced in pre-eclampsia. No difference was found for placental blood, and no correlation between peripheral and placental sHLA-G levels was found. We observed no association between neither fetal nor maternal HLA-G 14 bp insertion/deletion genotypes and pre-eclampsia, nor a significant difference in isoform profiles. However, in HLA-G 14 bp insertion/deletion heterozygous placental samples, we observed abundant HLA-G1 14 bp insertion allele expression in the term placentae, which is contrary to previous findings in first trimester trophoblast. Increased HLA-G1 14 bp insertion allele expression in the placenta was associated with reduced levels of placental sHLA-G and an altered isoform profile with increased relative levels of HLA-G1 and -G5 and reduced levels of HLA-G3. The results indicate that an allelic shift in heterozygous individuals could represent a novel regulatory pathway.
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Affiliation(s)
- Gry Persson
- Centre for Immune Regulation and Reproductive Immunology (CIRRI), Department of Clinical Biochemistry, The ReproHealth Research Consortium ZUH, Zealand University Hospital, and Department of Clinical Medicine, University of Copenhagen, Denmark
| | - Christina Seefeldt Stæhr
- Centre for Immune Regulation and Reproductive Immunology (CIRRI), Department of Clinical Biochemistry, The ReproHealth Research Consortium ZUH, Zealand University Hospital, and Department of Clinical Medicine, University of Copenhagen, Denmark
| | - Freja Syrach Klok
- Centre for Immune Regulation and Reproductive Immunology (CIRRI), Department of Clinical Biochemistry, The ReproHealth Research Consortium ZUH, Zealand University Hospital, and Department of Clinical Medicine, University of Copenhagen, Denmark
| | - Morten Lebech
- Department of Gynaecology and Obstetrics, The ReproHealth Research Consortium ZUH, Zealand University Hospital, and Department of Clinical Medicine, University of Copenhagen, Denmark
| | - Thomas Vauvert F Hviid
- Centre for Immune Regulation and Reproductive Immunology (CIRRI), Department of Clinical Biochemistry, The ReproHealth Research Consortium ZUH, Zealand University Hospital, and Department of Clinical Medicine, University of Copenhagen, Denmark
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Johnsen GM, Fjeldstad HES, Drabbels JJM, Haasnoot GW, Eikmans M, Størvold GL, Alnaes-Katjavivi P, Jacobsen DP, Scherjon SA, Redman CWG, Claas FHJ, Staff AC. A possible role for HLA-G in development of uteroplacental acute atherosis in preeclampsia. J Reprod Immunol 2021; 144:103284. [PMID: 33578175 DOI: 10.1016/j.jri.2021.103284] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 12/09/2020] [Accepted: 01/26/2021] [Indexed: 12/18/2022]
Abstract
HLA-G, a non-classical HLA molecule expressed by extravillous trophoblasts, plays a role in the maternal immune tolerance towards fetal cells. HLA-G expression is regulated by genetic polymorphisms in the 3' untranslated region (3'UTR). Low levels of HLA-G in the maternal circulation and placental tissue are linked to preeclampsia. Our objective was to investigate whether variants of the 3'UTR of the HLA-G gene in mother and fetus are associated with acute atherosis, a pregnancy specific arterial lesion of the decidua basalis that is prevalent in preeclampsia. Paired maternal and fetal DNA samples from 83 normotensive and 83 preeclamptic pregnancies were analyzed. We sequenced the part of the HLA-G 3'UTR containing a 14-bp insertion/deletion region and seven single nucleotide polymorphisms (SNPs). Associations with acute atherosis were tested by logistic regression. The frequency of heterozygosity for the 14-bp polymorphism (Ins/Del) and the +3142 SNP (C/G) variant in the fetus are associated with acute atherosis in preeclampsia (66.7 % vs. 39.6 %, p = 0.039, and 69.0 % vs. 43.4 %, p = 0.024). Furthermore, the fetal UTR-3 haplotype, which encompasses the 14-bp deletion and the +3142G variant, is associated with acute atherosis in preeclampsia (15 % vs. 3.8 %, p = 0.016). In conclusion, HLA-G polymorphisms in the fetus are associated with acute atherosis. We hypothesize that these polymorphisms lead to altered HLA-G expression in the decidua basalis, affecting local feto-maternal immune tolerance and development of acute atherosis.
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Affiliation(s)
- Guro M Johnsen
- Institute for Clinical Medicine, Faculty of Medicine, University of Oslo, Norway; Division of Obstetrics and Gyneacology, Oslo University Hospital, Norway; Institute for Experimental Medical Research, Oslo University Hospital, Norway.
| | - Heidi E S Fjeldstad
- Institute for Clinical Medicine, Faculty of Medicine, University of Oslo, Norway; Division of Obstetrics and Gyneacology, Oslo University Hospital, Norway
| | - Jos J M Drabbels
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Netherlands
| | - Geert W Haasnoot
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Netherlands
| | - Michael Eikmans
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Netherlands
| | - Gro L Størvold
- Institute for Clinical Medicine, Faculty of Medicine, University of Oslo, Norway; Division of Obstetrics and Gyneacology, Oslo University Hospital, Norway; Institute for Experimental Medical Research, Oslo University Hospital, Norway
| | | | - Daniel P Jacobsen
- Division of Obstetrics and Gyneacology, Oslo University Hospital, Norway
| | - Sicco A Scherjon
- Department of Obstetrics and Gynecology, University of Groningen, Netherlands
| | | | - Frans H J Claas
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Netherlands
| | - Anne Cathrine Staff
- Institute for Clinical Medicine, Faculty of Medicine, University of Oslo, Norway; Division of Obstetrics and Gyneacology, Oslo University Hospital, Norway
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A role for both HLA-F and HLA-G in reproduction and during pregnancy? Hum Immunol 2019; 81:127-133. [PMID: 31558330 DOI: 10.1016/j.humimm.2019.09.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/13/2019] [Accepted: 09/16/2019] [Indexed: 01/15/2023]
Abstract
The human major histocompatibility complex includes a group of non-classical HLA class I genes, HLA-E, -F and -G. While nearly all focus since the discovery of these class Ib molecules have been on basic biochemistry and molecular biology of HLA-G and HLA-E, as well as their expression patterns, functions in immune modulation and during pregnancy, and also possible implications in a range of diseases, in infertility and pregnancy complications, HLA-F has nearly been ignored. However, recent discoveries show that HLA-F can be expressed as both open conformers binding to a number of KIRs on primarily NK cells, as well as peptide-bound HLA-F binding to ILT2 and ILT4. Furthermore, a number of reports indicate a possible involvement of HLA-F in viral infections, in cancer immunology, and in fertility and reproduction, which may initiate more interest in this rather unknown HLA class I molecule. In this short review, we focus on recent discoveries that indicate a functional role for HLA-F in reproduction and during pregnancy, and the role of HLA-F in relation to HLA-G.
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Díaz-Peña R, de Los Santos MJ, Lucia A, Castro-Santos P. Understanding the role of killer cell immunoglobulin-like receptors in pregnancy complications. J Assist Reprod Genet 2019; 36:827-835. [PMID: 30847698 DOI: 10.1007/s10815-019-01426-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 02/20/2019] [Indexed: 12/14/2022] Open
Abstract
Pregnancy is a unique immunological situation in which a fetus-bearing paternal histocompatibility antigens can survive in a maternal environment without apparent rejection. To face this challenge, cells of the uterine immune system show characteristic changes in absolute number and composition during pregnancy. Particularly relevant to this process are uterine natural killer (uNK) cells and their cell surface receptors, killer immunoglobulin-like receptors (KIRs). The main purpose of this review is to outline the current body of knowledge on the involvement of KIRs in the complications of pregnancy. Implantation depends on the invasion of embryonic trophoblast cells into maternal uterine tissue and remodeling of the uterine spiral arterioles, which is essential for placental perfusion and successful pregnancy. The proper interaction between maternal KIRs and their ligands human leukocyte antigen (HLA) class I molecules, expressed by the extravillous trophoblast cells, is crucial in this process. KIRs are a complex family that includes both activator and inhibitory receptors. The activation profile is genetically determined in each individual and leads to diverse levels of functionality for NK and T cells on engagement with specific HLA class I molecules. An association between different KIR alleles and HLA molecules has been reported in pregnancy complications, supporting the idea of a relevant role of these receptors in successful pregnancy.
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Affiliation(s)
- R Díaz-Peña
- Liquid Biopsy Analysis Unit, Health Research Institute of Santiago (IDIS), Complexo Hospitalario Universitario de Santiago de Compostela (SERGAS), Santiago de Compostela, Spain
- Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Talca, Chile
| | - M J de Los Santos
- IVI-RMA, Fundación IVI; INCLIVA, IIS La Fe, Valencia University, Valencia, Spain
| | - Alejandro Lucia
- Faculty of Sport Sciences and Instituto de Investigación Hospital 12 de Octubre, Universidad Europea de Madrid, Madrid, Spain
| | - P Castro-Santos
- Inmunología, Centro de Investigaciones Biomédicas (CINBIO), Universidade de Vigo, Vigo, Spain.
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Bianchi M, Papacci P, Valentini CG, Barbagallo O, Vento G, Teofili L. Umbilical cord blood as a source for red-blood-cell transfusion in neonatology: a systematic review. Vox Sang 2018; 113:713-725. [PMID: 30328121 DOI: 10.1111/vox.12720] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/28/2018] [Accepted: 09/20/2018] [Indexed: 02/06/2023]
Abstract
The prevention and treatment of anaemia in newborn patients made tremendous progress in the last decades. However, red-blood-cell (RBC) transfusions remain unavoidable in many neonates candidate to surgery and especially in preterm infants. In particular, anaemia occurring in neonates born at extremely low gestational age is actually severe and frequently requires transfusions. Several approaches have been explored to prevent or even to reduce the threshold and the frequency of RBC transfusions. Among these, umbilical cord blood (UCB) collection and processing to obtain RBC components for autologous or allogeneic transfusion have been extensively investigated. In this systematic review, we revised the literature concerning the use of UCB for either autologous or allogeneic transfusion purposes and we illustrated the rationale for a transfusion therapy tailored to extremely preterm neonates, based on RBC concentrates from allogeneic UCB donations.
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Affiliation(s)
- Maria Bianchi
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Banca del sangue di cordone ombelicale UNICATT, Rome, Italy
| | - Patrizia Papacci
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
- Terapia Intensiva Neonatale, Rome, Italy
| | - Caterina Giovanna Valentini
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Banca del sangue di cordone ombelicale UNICATT, Rome, Italy
| | - Ombretta Barbagallo
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Banca del sangue di cordone ombelicale UNICATT, Rome, Italy
| | - Giovanni Vento
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
- Terapia Intensiva Neonatale, Rome, Italy
| | - Luciana Teofili
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Banca del sangue di cordone ombelicale UNICATT, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
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12
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Lower frequency of the HLA-G UTR-4 haplotype in women with unexplained recurrent miscarriage. J Reprod Immunol 2018; 126:46-52. [DOI: 10.1016/j.jri.2018.02.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 01/18/2018] [Accepted: 02/02/2018] [Indexed: 01/09/2023]
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13
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Ueshima C, Kataoka TR, Hirata M, Sugimoto A, Iemura Y, Minamiguchi S, Nomura T, Haga H. Possible Involvement of Human Mast Cells in the Establishment of Pregnancy via Killer Cell Ig-Like Receptor 2DL4. THE AMERICAN JOURNAL OF PATHOLOGY 2018; 188:1497-1508. [PMID: 29577936 DOI: 10.1016/j.ajpath.2018.02.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 01/30/2018] [Accepted: 02/22/2018] [Indexed: 12/21/2022]
Abstract
The involvement of mast cells in the establishment of pregnancy is unclear. Herein, we found that human mast cells are present in the decidual tissues of parous women and expressed a human-specific protein killer cell Ig-like receptor (KIR) 2DL4, a receptor for human leukocyte antigen G expressed on human trophoblasts. In contrast, decreased numbers of decidual mast cells and reduced KIR2DL4 expression were observed in these cells of infertile women who had undergone long-term corticosteroid treatment. Co-culture of the human mast cell line, LAD2, and human trophoblast cell line, HTR-8/SVneo, accelerated the migration and tube formation of HTR-8/SVneo cells in a KIR2DL4-dependent manner. These observations suggest the possible involvement of human mast cells in the establishment of pregnancy via KIR2DL4 and that long-term corticosteroid treatment may cause infertility by influencing the phenotypes of decidual mast cells.
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Affiliation(s)
- Chiyuki Ueshima
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
| | - Tatsuki R Kataoka
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan.
| | - Masahiro Hirata
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
| | - Akihiko Sugimoto
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
| | - Yoshiki Iemura
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
| | | | - Takashi Nomura
- Department of Dermatology, Kyoto University Hospital, Kyoto, Japan
| | - Hironori Haga
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
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14
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Eche S, Mackraj I, Moodley J. Circulating fetal and total cell-free DNA, and sHLA-G in black South African women with gestational hypertension and pre-eclampsia. Hypertens Pregnancy 2017; 36:295-301. [PMID: 29115889 DOI: 10.1080/10641955.2017.1385794] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Quantification of circulating fetal and total cell-free DNA (cfDNA) and soluble human leucocyte antigen (HLAG) in gestational hypertension and pre-eclampsia. METHODS Serum cfDNA were quantified in controls, pre-eclamptics, and gestational hypertensive patients using real-time qPCR. Soluble HLAG was measured by enzyme-linked immune-sorbent assay. RESULTS Serum fetal and total cfDNA levels were higher in pre-eclampsia compared with the controls and gestational hypertensives (p < 0.001), more so in severe compared with mild-to-moderate pre-eclampsia (p < 0.05). Soluble HLAG levels were lower in pre-eclamptics than controls and gestational hypertension (p < 0.05). CONCLUSION Circulating fetal and total cfDNA were increased, while soluble HLAG was decreased in pre-eclampsia.
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Affiliation(s)
- Simeon Eche
- a Discipline of Human Physiology , University of KwaZulu-Natal , Durban , South Africa
| | - Irene Mackraj
- a Discipline of Human Physiology , University of KwaZulu-Natal , Durban , South Africa
| | - Jagidesa Moodley
- b Discipline of Obstetrics and Gynecology and Women's Health and HIV Research Group , Nelson R Mandela School of Medicine, University of KwaZulu-Natal , Durban , South Africa
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15
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Persson G, Melsted WN, Nilsson LL, Hviid TVF. HLA class Ib in pregnancy and pregnancy-related disorders. Immunogenetics 2017; 69:581-595. [PMID: 28699111 DOI: 10.1007/s00251-017-0988-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 04/18/2017] [Indexed: 12/30/2022]
Abstract
The HLA class Ib genes, HLA-E, HLA-F, and HLA-G, were discovered long after the classical HLA class Ia genes. The elucidation of their functions had a modest beginning. However, their basic functions and involvement in pathophysiology and a range of diseases are now emerging. Although results from a range of studies support the functional roles for the HLA class Ib molecules in adult life, especially HLA-G and HLA-F have most intensively been, and were also primarily, studied in relation to reproduction and pregnancy. The expression of HLA class Ib proteins at the feto-maternal interface in the placenta seems to be important for the maternal acceptance of the semi-allogenic fetus. In contrast to the functions of HLA class Ia, HLA-G possesses immune-modulatory and tolerogenic functions. Here, we review an accumulating amount of data describing the functions of HLA class Ib molecules in relation to fertility, reproduction, and pregnancy, and a possible role for these molecules in certain pregnancy complications, such as implantation failure, recurrent spontaneous abortions, and pre-eclampsia. The results from different kinds of studies point toward a role for HLA class Ib, especially HLA-G, throughout the reproductive cycle from conception to the birth weight of the child.
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Affiliation(s)
- Gry Persson
- Department of Clinical Biochemistry, Centre for Immune Regulation and Reproductive Immunology (CIRRI), Zealand University Hospital, 10 Sygehusvej, 4000, Roskilde, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Wenna Nascimento Melsted
- Department of Clinical Biochemistry, Centre for Immune Regulation and Reproductive Immunology (CIRRI), Zealand University Hospital, 10 Sygehusvej, 4000, Roskilde, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Line Lynge Nilsson
- Department of Clinical Biochemistry, Centre for Immune Regulation and Reproductive Immunology (CIRRI), Zealand University Hospital, 10 Sygehusvej, 4000, Roskilde, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Vauvert F Hviid
- Department of Clinical Biochemistry, Centre for Immune Regulation and Reproductive Immunology (CIRRI), Zealand University Hospital, 10 Sygehusvej, 4000, Roskilde, Denmark.
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.
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16
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The Immunosignature of Mother/Fetus Couples in Gestational Diabetes Mellitus: Role of HLA-G 14 bp ins/del and PAPP-A A/C Polymorphisms in the Uterine Inflammatory Milieu. DISEASE MARKERS 2017; 2017:4254750. [PMID: 28655969 PMCID: PMC5471558 DOI: 10.1155/2017/4254750] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 04/06/2017] [Accepted: 04/23/2017] [Indexed: 12/30/2022]
Abstract
We enrolled 151 healthy mother/newborn couples and 26 with gestational diabetes mellitus (GDM). HLA-G and PAPP-A plasma levels were measured by ELISA at first and second trimesters, at delivery, and in cord blood. HLA-G 14 bp ins/del and PAPP-A A/C polymorphisms were genotyped. HLA-G del/del and PAPP-A C/C genotypes were more frequent among GDM mothers than controls. We observed a genetic epistasis between the two polymorphisms: the HLA-G del/del and PAPP-A C/C combination was carried by 8% of GDM mothers and 1.3% of controls (OR = 9.5, 95% CI = 0.8-109, p = 0.07). GDM mothers showed increased sHLA-G levels compared to controls (p = 0.004), and those carrying the HLA-G del/del genotype produced more sHLA-G at the second trimester and at delivery (p = 0.014). A genetic pressure by fetal genotype on maternal sHLA-G production was observed in GDM mothers with heterozygous HLA-G del/ins newborns (p = 0.02). Babies born to GDM mothers showed higher sHLA-G concentrations compared to those born to healthy mothers, and those carrying HLA-G del/del showed the highest sHLA-G levels (p = 0.013). PAPP-A amounts significantly increased along pregnancy (p < 0.001), but the median levels at the first and second trimesters were significantly lower in GDM (p = 0.03). Our findings first suggest an involvement of HLA-G and PAPP-A gene-protein interaction in GDM and highlight a possible contribution of the fetus in balancing maternal inflammation.
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17
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d’Almeida TC, Sadissou I, Milet J, Cottrell G, Mondière A, Avokpaho E, Gineau L, Sabbagh A, Massougbodji A, Moutairou K, Donadi EA, Favier B, Carosella E, Moreau P, Rouas-Freiss N, Courtin D, Garcia A. Soluble human leukocyte antigen -G during pregnancy and infancy in Benin: Mother/child resemblance and association with the risk of malaria infection and low birth weight. PLoS One 2017; 12:e0171117. [PMID: 28166246 PMCID: PMC5293225 DOI: 10.1371/journal.pone.0171117] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 01/04/2017] [Indexed: 11/19/2022] Open
Abstract
Human leukocyte antigen (HLA) G is a tolerogenic molecule involved in the maternal-fetal immune tolerance phenomenon. Its expression during some infectious diseases leading to immune evasion has been established. A first study conducted in Benin has shown that the production of soluble HLA-G (sHLA-G) during the first months of life is strongly correlated with the maternal level at delivery and associated with low birth weight and malaria. However sHLA-G measurements during pregnancy were not available for mothers and furthermore, to date the evolution of sHLA-G in pregnancy is not documented in African populations. To extend these previous findings, between January 2010 and June 2013, 400 pregnant women of a malaria preventive trial and their newborns were followed up in Benin until the age of 2 years. Soluble HLA-G was measured 3 times during pregnancy and repeatedly during the 2 years follow-up to explore how sHLA-G evolved and the factors associated. During pregnancy, plasma levels of sHLA-G remained stable and increased significantly at delivery (p<0.001). Multigravid women seemed to have the highest levels (p = 0.039). In infants, the level was highest in cord blood and decreased before stabilizing after 18 months (p<0.001). For children, a high level of sHLA-G was associated with malaria infection during the follow-up (p = 0.02) and low birth weight (p = 0.06). The mean level of sHLA-G during infancy was strongly correlated with the mother’s level during pregnancy (<0.001), and not only at delivery. Moreover, mothers with placental malaria infection had a higher probability of giving birth to a child with a high level of sHLA-g (p = 0.006). High sHLA-G levels during pregnancy might be associated with immune tolerance related to placental malaria. Further studies are needed but this study provides a first insight concerning the potential role of sHLA-G as a biomarker of weakness for newborns and infants.
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Affiliation(s)
- Tania C. d’Almeida
- Université Pierre et Marie Curie, Paris, France
- UMR 216-MERIT, Institut de Recherche pour le Développement, Faculté de Pharmacie - Université Paris Descartes, Sorbonne Paris-Cité, Paris, France
- * E-mail:
| | - Ibrahim Sadissou
- UMR 216-MERIT, Institut de Recherche pour le Développement, Faculté de Pharmacie - Université Paris Descartes, Sorbonne Paris-Cité, Paris, France
- Centre d’Etude et de Recherche sur le Paludisme Associé à la Grossesse et à l’Enfance, Faculté des Sciences de la Santé, Cotonou, Bénin
- Université d’Abomey-Calavi, Cotonou, Bénin
- Division of Clinical Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Brazil
| | - Jacqueline Milet
- UMR 216-MERIT, Institut de Recherche pour le Développement, Faculté de Pharmacie - Université Paris Descartes, Sorbonne Paris-Cité, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Gilles Cottrell
- UMR 216-MERIT, Institut de Recherche pour le Développement, Faculté de Pharmacie - Université Paris Descartes, Sorbonne Paris-Cité, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Amandine Mondière
- UMR 216-MERIT, Institut de Recherche pour le Développement, Campus de la Faculté des Sciences de la Santé (FSS) et de l’Institut des Sciences Biomédicales Appliquées (ISBA), Cotonou, Bénin
| | | | - Laure Gineau
- UMR 216-MERIT, Institut de Recherche pour le Développement, Faculté de Pharmacie - Université Paris Descartes, Sorbonne Paris-Cité, Paris, France
| | - Audrey Sabbagh
- UMR 216-MERIT, Institut de Recherche pour le Développement, Faculté de Pharmacie - Université Paris Descartes, Sorbonne Paris-Cité, Paris, France
| | - Achille Massougbodji
- Centre d’Etude et de Recherche sur le Paludisme Associé à la Grossesse et à l’Enfance, Faculté des Sciences de la Santé, Cotonou, Bénin
- Université d’Abomey-Calavi, Cotonou, Bénin
| | | | - Eduardo A. Donadi
- Division of Clinical Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Brazil
| | - Benoit Favier
- CEA, Institut des Maladies Emergentes et des Thérapies Innovantes (IMETI), Service de Recherches en Hémato-Immunologie (SRHI), Hôpital Saint-Louis, IUH, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, IUH, Hôpital Saint-Louis, UMR_E5, IUH, Paris, France
| | - Edgardo Carosella
- CEA, Institut des Maladies Emergentes et des Thérapies Innovantes (IMETI), Service de Recherches en Hémato-Immunologie (SRHI), Hôpital Saint-Louis, IUH, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, IUH, Hôpital Saint-Louis, UMR_E5, IUH, Paris, France
| | - Philippe Moreau
- CEA, Institut des Maladies Emergentes et des Thérapies Innovantes (IMETI), Service de Recherches en Hémato-Immunologie (SRHI), Hôpital Saint-Louis, IUH, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, IUH, Hôpital Saint-Louis, UMR_E5, IUH, Paris, France
| | - Nathalie Rouas-Freiss
- CEA, Institut des Maladies Emergentes et des Thérapies Innovantes (IMETI), Service de Recherches en Hémato-Immunologie (SRHI), Hôpital Saint-Louis, IUH, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, IUH, Hôpital Saint-Louis, UMR_E5, IUH, Paris, France
| | - David Courtin
- UMR 216-MERIT, Institut de Recherche pour le Développement, Faculté de Pharmacie - Université Paris Descartes, Sorbonne Paris-Cité, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - André Garcia
- Université Pierre et Marie Curie, Paris, France
- UMR 216-MERIT, Institut de Recherche pour le Développement, Faculté de Pharmacie - Université Paris Descartes, Sorbonne Paris-Cité, Paris, France
- Centre d’Etude et de Recherche sur le Paludisme Associé à la Grossesse et à l’Enfance, Faculté des Sciences de la Santé, Cotonou, Bénin
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18
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Recent Advances in Our Understanding of HLA-G Biology: Lessons from a Wide Spectrum of Human Diseases. J Immunol Res 2016; 2016:4326495. [PMID: 27652273 PMCID: PMC5019910 DOI: 10.1155/2016/4326495] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 07/23/2016] [Indexed: 12/27/2022] Open
Abstract
HLA-G is a HLA-class Ib molecule with potent immunomodulatory activities, which is expressed in physiological conditions, where modulation of the immune response is required to avoid allograft recognition (i.e., maternal-fetal interface or transplanted patients). However, HLA-G can be expressed de novo at high levels in several pathological conditions, including solid and hematological tumors and during microbial or viral infections, leading to the impairment of the immune response against tumor cells or pathogens, respectively. On the other hand, the loss of HLA-G mediated control of the immune responses may lead to the onset of autoimmune/inflammatory diseases, caused by an uncontrolled activation of the immune effector cells. Here, we have reviewed novel findings on HLA-G functions in different physiological and pathological settings, which have been published in the last two years. These studies further confirmed the important role of this molecule in the modulation of the immune system.
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He Y, Chen S, Huang H, Chen Q. Association between decreased plasma levels of soluble human leukocyte antigen-G and severe pre-eclampsia. J Perinat Med 2016; 44:283-90. [PMID: 26352061 DOI: 10.1515/jpm-2015-0062] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 07/09/2015] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the levels of different isoforms of soluble human leukocyte antigen-G (sHLA-G) in maternal plasma during early and late pregnancy, and to investigate the expression of sHLA-G isoforms in women with early or late-onset severe preeclampsia. METHODS This prospective, nested, case-control study was performed in 24 early-onset severe preeclamptic, 34 late-onset severe preeclamptic, and 74 uncomplicated pregnant women. Plasma levels of sHLA-G1/5 were measured using ELISA. RESULTS Plasma sHLA-G1 levels in women with late-onset severe preeclampsia were markedly lower compared with normal controls (median: 0 vs. 1.22 ng/mL) at the first trimester, and plasma sHLA-G1 levels in women with early-onset severe preeclampsia were markedly lower compared with normal controls at the second (median: 0 vs. 1.24 ng/mL) and third (median: 0 vs. 1.34 ng/mL) trimesters. There was no difference between the late-onset and early-onset groups at three trimesters. As for sHLA-G5, there was no difference in concentrations among the three groups at any time point. However, compared with controls, more women with early- or late-onset severe preeclampsia had undetectable sHLA-G5 levels in the first (71.4% and 76.2% vs. 14.1%), second (75.0% and 73.3% vs. 19.0%), and third (100.0% and 70.4% vs. 14.8%, respectively) trimester (all P<0.05). sHLA-G1 levels in the first (odds ratio [OR]=0.254, 95% confidence interval [CI]=0.109-0.591, P=0.010), second (OR=0.315, 95% CI=0.158-0.627, P=0.001), and third (OR=0.170, 95% CI=0.054-0.533, P=0.002) trimester was a risk factor for severe preeclampsia. CONCLUSION Severe preeclampsia was associated with low/undetectable maternal plasma levels of sHLA-G. Low sHLA-G1 levels might be a risk marker for severe preeclampsia.
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20
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Zidi I, Rizzo R, Bouaziz A, Laaribi AB, Zidi N, Di Luca D, Tlili H, Bortolotti D. sHLA-G1 and HLA-G5 levels are decreased in Tunisian women with multiple abortion. Hum Immunol 2016; 77:342-5. [DOI: 10.1016/j.humimm.2016.01.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 11/20/2015] [Accepted: 01/22/2016] [Indexed: 01/10/2023]
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