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Jiang C, Geng M, Zhang C, She H, Wang D, Wang J, Liu J, Diao F, Cai L, Hu Y. The synergy of morphokinetic parameters and sHLA-G in cleavage embryo enhancing implantation rates. Front Cell Dev Biol 2024; 12:1417375. [PMID: 39081861 PMCID: PMC11286472 DOI: 10.3389/fcell.2024.1417375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Accepted: 05/28/2024] [Indexed: 08/02/2024] Open
Abstract
Objective: This study aimed to assess the relationship between implantation and soluble HLA-G (sHLA-G) expression in cleavage embryo culture medium (ECM) in conjunction with early developmental kinetics determined by time-lapse imaging (TLI). Methods: A retrospective, single-center study was conducted involving 238 embryos from 165 patients who underwent Frozen-thawed embryo transfer (FET) using autologous oocytes, with either single or double embryo transfer. TLI morphokinetic parameters (t2, t3, t4, t5, t6, t7, t8, cc2, s2, cc3, s3) of embryos were analyzed, and sHLA-G levels in D3 ECM were measured using an enzyme-linked immunosorbent assay (ELISA). A hierarchical classification model was developed to categorize embryos into five groups (A, B, C, D, E). The correlation between sHLA-G levels, TLI classification of embryos, and embryo implantation was investigated to establish a non-invasive method for evaluating implantation potential. Multivariate logistic regression analysis was performed to identify potential influencing factors, and receiver operating characteristic (ROC) curves were used to evaluate the predictive value for implantation. Results: Multivariate unconditional logistic regression analysis indicated that TLI parameters t5 and s3 and sHLA-G level in ECM were independent risk factors affecting embryo implantation. The implantation rate decreased from TLI classification A to E. The proposed classification model effectively assessed the implantation potential of embryos. The implantation rate was higher in the sHLA-G positive group compared to the sHLA-G negative group (p < 0.001). The expression of sHLA-G in D3 ECM, combined with the TLI classification model, accurately evaluated the implantation potential of embryos with an AUC of 0.876. Conclusion: The integration of cleavage kinetics and embryonic sHLA-G expression could reliably identify embryos with a high likelihood of successful implantation.
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Affiliation(s)
- Chunyan Jiang
- State Key Laboratory of Reproductive Medicine and Offspring Health, Clinical Center of Reproductive Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Menghui Geng
- Reproductive Medicine Center of Northern Jiangsu People’s Hospital, Yangzhou, China
- Department of Obstetrics and Gynecology, The 2 Affiliated Hospital and Yuying Chidren’s Hospital of Wenzhou Medical University, Wenzhou, China
| | - Can Zhang
- Department of Obstetrics and Gynecology, Tumor Hospital Affiliated to Nantong University, Nantong, China
| | - Hong She
- Reproductive Medicine Center of Northern Jiangsu People’s Hospital, Yangzhou, China
| | - Dalin Wang
- Reproductive Medicine Center of Xu Zhou Maternity and Child Healthcare Hospital Affiliated to Xuzhou Medical University, Xuzhou, China
| | - Jing Wang
- State Key Laboratory of Reproductive Medicine and Offspring Health, Clinical Center of Reproductive Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jiayin Liu
- State Key Laboratory of Reproductive Medicine and Offspring Health, Clinical Center of Reproductive Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Feiyang Diao
- State Key Laboratory of Reproductive Medicine and Offspring Health, Clinical Center of Reproductive Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Lingbo Cai
- State Key Laboratory of Reproductive Medicine and Offspring Health, Clinical Center of Reproductive Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yanqiu Hu
- State Key Laboratory of Reproductive Medicine and Offspring Health, Clinical Center of Reproductive Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
- Reproductive Medicine Center of Northern Jiangsu People’s Hospital, Yangzhou, China
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Radwan P, Tarnowska A, Piekarska K, Wiśniewski A, Krasiński R, Radwan M, Nowak I. The impact of soluble HLA-G in IVF/ICSI embryo culture medium on implantation success. Front Immunol 2022; 13:982518. [PMID: 36505440 PMCID: PMC9730522 DOI: 10.3389/fimmu.2022.982518] [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: 06/30/2022] [Accepted: 11/04/2022] [Indexed: 11/25/2022] Open
Abstract
The HLA-G molecule is widely accepted as an important factor for pregnancy success. Its expression has been detected in the extravillous trophoblasts. Soluble HLA-G (sHLA-G) was found in the genital tract, pre-implanted embryos as well as in seminal fluid. In this study, we investigated the concentration of sHLA-G (sHLA-G1 and sHLA-G5) in media from 344 single cultured embryos following in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI). The level of sHLA-G (U/ml) was tested with a sandwich enzyme-linked immunosorbent assay (ELISA) kit. We correlated sHLA-G secretion with ovarian stimulation protocols, the type of embryo transfer (fresh or frozen cycle) and the quality of the embryos. The ovarian stimulation protocol affects the secretion of sHLA-G by the embryo. Embryos obtained from the long agonist protocol secreted more sHLA-G than those originating from the short antagonist protocol (p = 0.0001). Embryos whose transfer resulted in a clinical pregnancy and/or live birth secreted more sHLA-G compared to those whose transfer ended without pregnancy. This was particularly observable in embryos following the long ovarian stimulation protocol and from a frozen embryo cycle. In conclusion, sHLA-G secreted by the embryo has an impact on implantation and live birth and could be a developmental potential marker of the embryo. Its concentration depends on the ovarian stimulation protocol used.
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Affiliation(s)
- Paweł Radwan
- Gameta Hospital, Department of Reproductive Medicine, Rzgów, Poland
| | - Agnieszka Tarnowska
- Laboratory of Immunogenetics and Tissue Immunology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Department of Clinical Immunology, Wrocław, Poland
| | - Karolina Piekarska
- Laboratory of Immunogenetics and Tissue Immunology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Department of Clinical Immunology, Wrocław, Poland
| | - Andrzej Wiśniewski
- Laboratory of Immunogenetics and Tissue Immunology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Department of Clinical Immunology, Wrocław, Poland
| | - Rafał Krasiński
- Gameta Hospital, Department of Reproductive Medicine, Rzgów, Poland
| | - Michał Radwan
- Gameta Hospital, Department of Reproductive Medicine, Rzgów, Poland
| | - Izabela Nowak
- Laboratory of Immunogenetics and Tissue Immunology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Department of Clinical Immunology, Wrocław, Poland,*Correspondence: Izabela Nowak,
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Vani V, Vasan SS, Adiga SK, Varsha SR, Sachdeva G, Kumar P, Seshagiri PB. Soluble human leukocyte antigen-G is a potential embryo viability biomarker and a positive predictor of live-births in humans. Am J Reprod Immunol 2021; 86:e13499. [PMID: 34766406 DOI: 10.1111/aji.13499] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 08/18/2021] [Accepted: 09/20/2021] [Indexed: 11/27/2022] Open
Abstract
PROBLEM Human infertility affects 15-20% of reproductive-age couples and it is mitigated by assisted reproductive technology (ART) approaches. Poor biological viability of embryos contributes to implantation failure and live birth rate (LBR). This study is aimed to examine whether or not embryo-secreted soluble human leukocyte antigen-G (sHLA-G) is (i) associated with developing embryos and (ii) able to predict successful pregnancy outcome. METHOD OF STUDY A retrospective, multicentric study using 539 human embryo spent medium samples (E-SMs), analysed for sHLA-G levels by ELISA. Correlation analysis was performed on sHLA-G levels with developing embryonic stages, their quality scores and pregnancy outcome in terms of LBR. RESULTS Of 539 E-SMs analysed, 445 had detectable sHLA-G (83%) with levels varying within and across clinics and, between stages of embryonic development. Levels of sHLA-G (ng/mL) were significantly (P < .05) different in E-SMs of cleavage-stage embryos versus blastocysts. There was an insignificant correlation between the sHLA-G levels and morphology scores of embryos. But, sHLA-G levels showed a positive correlation with grades of blastocysts and importantly, its levels were significantly (P < .05) higher in live-birth vis-a-vis no-birth cases. Also, levels were higher in live-births out of blastocysts-ETs versus cleavage-stage-embryo transfers. Altered levels were observed with embryos, which resulted in miscarriages. Overall, a significant (P < .0001) association of sHLA-G with live births was observed. CONCLUSION Embryo-derived sHLA-G can be a valuable embryo viability, independent, biomarker, which can predict live-birth outcome and it could be useful as an adjunct to existing criteria for elective single embryo transfer.
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Affiliation(s)
- Venkatappa Vani
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Sir C.V. Raman Road, Bangalore, India
| | - Satya S Vasan
- Manipal Ankur Andrology & Reproductive Services, Bangalore, India
| | - Satish K Adiga
- Department of Clinical Embryology, Kasturba Medical College, Manipal, India
| | | | | | - Pratap Kumar
- Department of Reproductive Medicine & Surgery, Kasturba Medical College, Manipal, India
| | - Polani B Seshagiri
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Sir C.V. Raman Road, Bangalore, India
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Bahrami-Asl Z, Hajipour H, Rastgar Rezaei Y, Novinbahador T, Latifi Z, Nejabati HR, Farzadi L, Fattahi A, Nouri M, Dominguez F. Cytokines in embryonic secretome as potential markers for embryo selection. Am J Reprod Immunol 2020; 85:e13385. [PMID: 33300214 DOI: 10.1111/aji.13385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 12/01/2020] [Indexed: 12/14/2022] Open
Abstract
Despite performing certain morphological assessments for selecting the best embryo for transfer, the results have not been satisfactory. Given the global tendency for performing quick and noninvasive tests for embryo selection, great efforts have been made to discover the predictive biomarkers of embryo implantation potential. In recent years, many factors have been detected in embryo culture media as a major source of embryo secretions. Previous studies have evaluated cytokines, miRNAs, extracellular vesicles, and other factors such as leukemia inhibitory factor, colony-stimulating factor, reactive oxygen species, soluble human leukocyte antigen G, amino acids, and apolipoproteins in these media. Given the key role of cytokines in embryo implantation, these factors can be considered promising molecules for predicting the implantation success of assisted reproductive technology (ART). The present study was conducted to review embryo-secreted molecules as potential biomarkers for embryo selection in ART.
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Affiliation(s)
- Zahra Bahrami-Asl
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamed Hajipour
- Department of Reproductive Biology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yeganeh Rastgar Rezaei
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Tannaz Novinbahador
- Department of Biology, Faculty of Natural Science, University of Tabriz, Tabriz, Iran
| | - Zeinab Latifi
- Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamid Reza Nejabati
- Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Laya Farzadi
- Women's Reproductive Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Fattahi
- Department of Reproductive Biology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.,Women's Reproductive Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Nouri
- Department of Reproductive Biology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.,Institute for Stem Cell and Regenerative Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Francisco Dominguez
- Fundacion Instituto Valenciano de Infertilidad (FIVI), Instituto Universitario IVI (IUIVI), ISS LaFe, Valencia, Spain
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5
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Bartolucci AF, Peluso JJ. Necessity is the mother of invention and the evolutionary force driving the success of in vitro fertilization. Biol Reprod 2020; 104:255-273. [PMID: 32975285 DOI: 10.1093/biolre/ioaa175] [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: 05/26/2020] [Revised: 08/21/2020] [Accepted: 09/24/2020] [Indexed: 11/13/2022] Open
Abstract
During the last few decades, millions of healthy children have been born with the aid of in vitro fertilization (IVF). This success belies the fact that IVF treatment is comprised of a complex series of interventions starting with a customized control ovarian stimulation protocol. This is followed by the induction of oocyte maturation, the retrieval of mature oocytes and in vitro fertilization, which often involves the microinjection of a single sperm into the oocyte. After fertilization, the resulting embryos are cultured for up to 7 days. The best embryos are transferred into the uterus where the embryo implants and hopefully develops into a healthy child. However, frequently the best embryos are biopsied and frozen. The biopsied cells are analyzed to identify those embryos without chromosomal abnormalities. These embryos are eventually thawed and transferred with pregnancy rates as good if not better than embryos that are not biopsied and transferred in a fresh cycle. Thus, IVF treatment requires the coordinated efforts of physicians, nurses, molecular biologists and embryologists to conduct each of these multifaceted phases in a seamless and flawless manner. Even though complex, IVF treatment may seem routine today, but it was not always the case. In this review the evolution of human IVF is presented as a series of innovations that resolved a technical hurdle in one component of IVF while creating challenges that eventually lead to the next major advancement. This step-by-step evolution in the treatment of human infertility is recounted in this review.
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Affiliation(s)
- Alison F Bartolucci
- Department of Obstetrics and Gynecology, University of Connecticut Health Center.,The Center for Advanced Reproductive Services, Farmington, CT, USA
| | - John J Peluso
- Department of Obstetrics and Gynecology, University of Connecticut Health Center.,Department of Cell Biology, University of Connecticut Health Center, Farmington, CT, USA
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Siristatidis CS, Sertedaki E, Karageorgiou V, Vaidakis D. Endometrial injection of embryo culture supernatant for subfertile women in assisted reproduction. Cochrane Database Syst Rev 2020; 8:CD013063. [PMID: 32797689 PMCID: PMC8094452 DOI: 10.1002/14651858.cd013063.pub2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Despite substantial improvements in the success of assisted reproduction techniques (ART), live birth rates may remain consistently low, and practitioners may look for innovative treatments to improve the outcomes. The injection of embryo culture supernatant in the endometrial cavity can be undertaken at various time intervals before embryo transfer. It provides an altered endometrial environment through the secretion of factors considered to facilitate implantation. It is proposed that injection of the supernatant into the endometrial cavity prior to embryo transfer will stimulate the endometrium and provide better conditions for implantation to take place. An increased implantation rate would subsequently increase rates of clinical pregnancy and live birth, but current robust evidence on the efficacy of injected embryo culture supernatant is lacking. OBJECTIVES To evaluate the effectiveness and safety of endometrial injection of embryo culture supernatant before embryo transfer in women undergoing ART. SEARCH METHODS Our search strategies were designed with the help of the Cochrane Gynaecology and Fertility Group Information Specialist. We sought to identify all published and unpublished randomised controlled trials (RCTs) meeting inclusion criteria. Searches were performed on 2 December 2019. We searched the Cochrane Gynaecology and Fertility Group Specialised Register of controlled trials, CENTRAL, MEDLINE, Embase, CINAHL, trials registries and grey literature. We made further searches in the UK National Institute for Health and Care Excellence (NICE) fertility assessment and treatment guidelines. We handsearched reference lists of relevant systematic reviews and RCTs, together with searches of PubMed and Google for any recent trials that have not yet been indexed in the major databases. We had no language or location restrictions. SELECTION CRITERIA We included RCTs testing the use of endometrial injection of embryo culture supernatant before embryo transfer during an ART cycle, compared with the non-use of this intervention, the use of placebo or the use of any other similar drug. DATA COLLECTION AND ANALYSIS Two review authors independently selected studies, assessed risk of bias, extracted data from studies and attempted to contact the authors where data were missing. We pooled studies using a fixed-effect model. Our primary outcomes were live birth/ongoing pregnancy and miscarriage. We performed statistical analysis using Review Manager 5. We assessed evidence quality using GRADE methods. MAIN RESULTS We found five RCTs suitable for inclusion in the review (526 women analysed). We made two comparisons: embryo culture supernatant use versus standard care or no intervention; and embryo culture supernatant use versus culture medium. All studies were published as full-text articles. Data derived from the reports or through direct communication with investigators were available for the final meta-analysis performed. The GRADE evidence quality of studies ranged from very low-quality to moderate-quality. Factors reducing evidence quality included high risk of bias due to lack of blinding, unclear risk of publication bias and selective outcome reporting, serious inconsistency among study outcomes, and serious imprecision due to wide confidence intervals (CIs) and low numbers of events. Comparison 1. Endometrial injection of embryo culture supernatant before embryo transfer versus standard care or no intervention: One study reported live birth only and two reported the composite outcome live birth and ongoing pregnancy. We are uncertain whether endometrial injection of embryo culture supernatant before embryo transfer during an ART cycle improves live birth/ongoing pregnancy rates compared to no intervention (odds ratio (OR) 1.11, 95% CI 0.73 to 1.70; 3 RCTs; n = 340, I2 = 84%; very low-quality evidence). Results suggest that if the chance of live birth/ongoing pregnancy following placebo or no treatment is assumed to be 42%, the chance following the endometrial injection of embryo culture supernatant before embryo transfer would vary between 22% and 81%. We are also uncertain whether the endometrial injection of embryo culture supernatant could decrease miscarriage rates, compared to no intervention (OR 0.89, 95% CI 0.44 to 1.78, 4 RCTs, n = 430, I2 = 58%, very low-quality evidence). Results suggest that if the chance of miscarriage following placebo or no treatment is assumed to be 9%, the chance following injection of embryo culture supernatant would vary between 3% and 30%. Concerning the secondary outcomes, we are uncertain whether the injection of embryo culture supernatant prior to embryo transfer could increase clinical pregnancy rates (OR 1.13, 95% CI 0.80 to 1.61; 5 RCTs; n = 526, I2 = 0%; very low-quality evidence), decrease ectopic pregnancy rates (OR 0.32, 95% CI 0.01 to 8.24; n = 250; 2 RCTs; I2 = 41%; very low-quality evidence), decrease multiple pregnancy rates (OR 0.70, 95% CI 0.26 to 1.83; 2 RCTs; n = 150; I2 = 63%; very low-quality evidence), or decrease preterm delivery rates (OR 0.63, 95% CI 0.17 to 2.42; 1 RCT; n = 90; I2 = 0%; very low-quality evidence), compared to no intervention. Finally, there may have been little or no difference in foetal abnormality rates between the two groups (OR 3.10, 95% CI 0.12 to 79.23; 1 RCT; n = 60; I2 = 0%; low-quality evidence). Comparison 2. Endometrial injection of embryo culture supernatant versus endometrial injection of culture medium before embryo transfer We are uncertain whether the use of embryo culture supernatant improves clinical pregnancy rates, compared to the use of culture medium (OR 1.09, 95% CI 0.48 to 2.46; n = 96; 1 RCT; very low-quality evidence). No study reported live birth/ongoing pregnancy, miscarriage, ectopic or multiple pregnancy, preterm delivery or foetal abnormalities. AUTHORS' CONCLUSIONS We are uncertain whether the addition of endometrial injection of embryo culture supernatant before embryo transfer as a routine method for the treatment of women undergoing ART can improve pregnancy outcomes. This conclusion is based on current available data from five RCTs, with evidence quality ranging from very low to moderate across studies. Further large well-designed RCTs reporting on live births and adverse clinical outcomes are still required to clarify the exact role of endometrial injection of embryo culture supernatant before embryo transfer.
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Affiliation(s)
- Charalampos S Siristatidis
- Assisted Reproduction Unit, 2nd Department of Obstetrics and Gynaecology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Vasilios Karageorgiou
- Second Department of Psychiatry, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Dennis Vaidakis
- Obstetrics and Gynaecology Department, Larnaca General Hospital, Larnaca, Cyprus
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7
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Würfel FM, Winterhalter C, Trenkwalder P, Wirtz RM, Würfel W. European Patent in Immunoncology: From Immunological Principles of Implantation to Cancer Treatment. Int J Mol Sci 2019; 20:ijms20081830. [PMID: 31013867 PMCID: PMC6514949 DOI: 10.3390/ijms20081830] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 04/09/2019] [Accepted: 04/09/2019] [Indexed: 12/19/2022] Open
Abstract
The granted European patent EP 2 561 890 describes a procedure for an immunological treatment of cancer. It is based on the principles of the HLA-supported communication of implantation and pregnancy. These principles ensure that the embryo is not rejected by the mother. In pregnancy, the placenta, more specifically the trophoblast, creates an “interface” between the embryo/fetus and the maternal immune system. Trophoblasts do not express the “original” HLA identification of the embryo/fetus (HLA-A to -DQ), but instead show the non-classical HLA groups E, F, and G. During interaction with specific receptors of NK cells (e.g., killer-immunoglobulin-like receptors (KIR)) and lymphocytes (lymphocyte-immunoglobulin-like receptors (LIL-R)), the non-classical HLA groups inhibit these immunocompetent cells outside pregnancy. However, tumors are known to be able to express these non-classical HLA groups and thus make use of an immuno-communication as in pregnancies. If this occurs, the prognosis usually worsens. This patent describes, in a first step, the profiling of the non-classical HLA groups in primary tumor tissue as well as metastases and recurrent tumors. The second step comprises tailored antibody therapies, which is the subject of this patent. In this review, we analyze the underlying mechanisms and describe the currently known differences between HLA-supported communication of implantation and that of tumors.
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Affiliation(s)
- Franziska M Würfel
- STRATIFYER Molecular Pathology GmbH, D-50935 Cologne, Werthmannstrasse 1c, 50935 Cologne, Germany.
| | | | | | - Ralph M Wirtz
- STRATIFYER Molecular Pathology GmbH, D-50935 Cologne, Werthmannstrasse 1c, 50935 Cologne, Germany.
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Nerenz RD. Omics in Reproductive Medicine: Application of Novel Technologies to Improve the IVF Success Rate. Adv Clin Chem 2016; 76:55-95. [PMID: 27645816 DOI: 10.1016/bs.acc.2016.05.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Treatment for many infertile couples often consists of in vitro fertilization (IVF) but an estimated 70% of IVF cycles fail to produce a live birth. In an attempt to improve the live birth rate, the vast majority of IVF cycles performed in the United States involve the transfer of multiple embryos, a practice that increases the risk of multiple gestation pregnancy. This is a concern because multiple gestation pregnancies are associated with an increased incidence of maternal and fetal complications and significant cost associated with the care of preterm infants. As the ideal outcome of each IVF cycle is the birth of a single healthy baby, significant effort has focused on identifying embryos with the greatest developmental potential. To date, selection of euploid embryos using comprehensive chromosome screening (CCS) is the most promising approach while metabolomic and proteomic assessment of spent culture medium have the potential to noninvasively assess embryo viability. Endometrial gene expression profiling may help determine the optimal time to perform embryo transfer. While CCS has been implemented in some clinics, further development and optimization will be required before analysis of spent culture medium and endometrial gene expression profiling make the transition to clinical use. This review will describe efforts to identify embryos with the greatest potential to result in a healthy, live birth, with a particular emphasis on detection of embryo aneuploidy and metabolic profiling of spent embryo culture medium. Assessment of endometrial receptivity to identify the optimal time to perform embryo transfer will also be discussed.
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Affiliation(s)
- R D Nerenz
- Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States.
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9
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Rødgaard T, Heegaard PM, Callesen H. Non-invasive assessment of in-vitro embryo quality to improve transfer success. Reprod Biomed Online 2015; 31:585-92. [DOI: 10.1016/j.rbmo.2015.08.003] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 08/05/2015] [Accepted: 08/06/2015] [Indexed: 12/12/2022]
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10
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Lundin K, Ahlström A. Quality control and standardization of embryo morphology scoring and viability markers. Reprod Biomed Online 2015; 31:459-71. [PMID: 26277586 DOI: 10.1016/j.rbmo.2015.06.026] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 06/16/2015] [Accepted: 06/23/2015] [Indexed: 01/03/2023]
Abstract
A so-called 'good-quality embryo' may be defined as an embryo that has the potential to implant into the uterine endometrium and give rise to the birth of a healthy child. A standardized and objective scoring of embryo 'quality' is therefore crucial in the classification and selection of embryos. However, embryo scoring is still being performed mainly via ocular evaluation, which often results in different interpretations of embryo quality. The addition of viability markers, such as measuring gene expression or the uptake/release of metabolites, proteins or RNA/DNA molecules in the culture media, would increase the possibility of standardized measurements. However, no single biomarker has yet been introduced into standard clinical practice, mainly due to the complexity of the techniques and the influence of biological variations and differences in culture conditions. In this paper different methods for the scoring of embryos and the possibility of standardizing and implementing quality control systems are discussed.
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Affiliation(s)
- Kersti Lundin
- Reproductive Medicine, Sahlgrenska University Hospital, Göteborg 413 45, Sweden.
| | - Aisling Ahlström
- Reproductive Medicine, Sahlgrenska University Hospital, Göteborg 413 45, Sweden
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11
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Krisher RL, Schoolcraft WB, Katz-Jaffe MG. Omics as a window to view embryo viability. Fertil Steril 2015; 103:333-41. [PMID: 25639968 DOI: 10.1016/j.fertnstert.2014.12.116] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 12/16/2014] [Accepted: 12/16/2014] [Indexed: 12/13/2022]
Abstract
The advent of advanced omics technologies and the application of these techniques to the analysis of extremely limited material have opened the door to the investigation of embryo physiology in a focused, in-depth approach never before possible. The application of noninvasive metabolomic and proteomic platforms to understanding embryo viability permits the characterization of individual embryos in culture. Initial clinical data have highlighted the promise of these technologies for the development of noninvasive embryo selection criteria. In this way, a complex view of embryo function can be compiled and related to embryo development, quality, and outcome. Application of knowledge gained from omics will transform both our understanding of embryo physiology as well as our ability to select viable embryos for transfer in assisted reproductive technology.
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12
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Rasmussen M, Dahl M, Buus S, Djurisic S, Ohlsson J, Hviid TVF. Evaluation of a competitive enzyme-linked immunosorbent assay for measurements of soluble HLA-G protein. ACTA ACUST UNITED AC 2014; 84:206-15. [DOI: 10.1111/tan.12357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 03/24/2014] [Accepted: 03/25/2014] [Indexed: 12/01/2022]
Affiliation(s)
- M Rasmussen
- Department of Clinical Biochemistry, Centre for Immune Regulation and Reproductive Immunology (CIRRI), Copenhagen University Hospital (Roskilde) and Roskilde Hospital, Roskilde, Denmark
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Abstract
Human leukocyte antigen-G (HLA-G) is a low polymorphic nonclassical HLA-I molecule restrictively expressed and with suppressive functions. HLA-G gene products are quite complex, with seven HLA-G isoforms, four membrane bound, and other three soluble isoforms that can suffer different posttranslational modifications or even complex formations. In addition, HLA-G has been described included in exosomes. In this review we will focus on HLA-G biochemistry with special emphasis to the mechanisms that regulate its expression and how the protein modifications affect the quantification in biological fluids.
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Rizzo R. HLA-G molecules in pregnancy and their possible role in assisted reproductive technology. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/eog.09.21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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15
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Ajduk A, Zernicka-Goetz M. Quality control of embryo development. Mol Aspects Med 2013; 34:903-18. [DOI: 10.1016/j.mam.2013.03.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Revised: 03/05/2013] [Accepted: 03/19/2013] [Indexed: 11/28/2022]
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16
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Embryology in the era of proteomics. Fertil Steril 2013; 99:1073-7. [DOI: 10.1016/j.fertnstert.2012.12.038] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 12/19/2012] [Accepted: 12/20/2012] [Indexed: 11/20/2022]
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17
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González A, Rebmann V, LeMaoult J, Horn PA, Carosella ED, Alegre E. The immunosuppressive molecule HLA-G and its clinical implications. Crit Rev Clin Lab Sci 2012; 49:63-84. [PMID: 22537084 DOI: 10.3109/10408363.2012.677947] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Human leukocyte antigen G (HLA-G) is a non-classical major histocompatibility complex (MHC) class I molecule that, through interaction with its receptors, exerts important tolerogenic functions. Its main physiological expression occurs in placenta where it seems to participate in the maternal tolerance toward the fetus. HLA-G has been studied as a marker of pregnancy complications such as abortion or pre-eclapmsia. Although HLA-G is not expressed in most adult tissues, its ectopic expression has been observed in some diseases such as viral infections, autoimmune disorders, and especially cancer. HLA-G neo-expression in cancer is associated with the capability of tumor cells to evade the immune control. In this review, we will summarize HLA-G biology and how it participates in these physiopathological processes. Special attention will be paid to its role as a diagnostic tool and also as a therapeutic target.
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Affiliation(s)
- Alvaro González
- Department of Biochemistry, University Clinic of Navarra, Pamplona, Spain.
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18
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Ramu S, Acacio B, Adamowicz M, Parrett S, Jeyendran RS. Human chorionic gonadotropin from day 2 spent embryo culture media and its relationship to embryo development. Fertil Steril 2011; 96:615-7. [PMID: 21742325 DOI: 10.1016/j.fertnstert.2011.06.035] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 06/01/2011] [Accepted: 06/14/2011] [Indexed: 12/28/2022]
Abstract
OBJECTIVE To detect hCG in spent embryo culture media at day 2 after intracytoplasmic sperm injection and to assess the relationship of hCG to embryo development. DESIGN Experimental study. SETTING Fertility center and clinical diagnostic laboratory. SAMPLE(S) A total of 102 spent culture media from day 2 human embryos and corresponding unexposed media for blank control. INTERVENTION(S) The culture media samples were tested for hCG by ELISA. MAIN OUTCOME MEASURE(S) Quantity of hCG produced by embryos and correlation with the embryos' developmental status. RESULT(S) hCG was found in 93 of 102 culture media tested by enzyme-linked immunosorbent assay. The correlation analysis revealed that the concentration of hCG was independent of embryo developmental status. CONCLUSION(S) The ability to detect hCG from day 2 spent culture media may be used as a marker for embryo competence.
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Affiliation(s)
- Sivakumar Ramu
- Andrology Laboratory Services Inc., Chicago, Illinois 60611, USA.
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19
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Nel-Themaat L, Nagy ZP. A review of the promises and pitfalls of oocyte and embryo metabolomics. Placenta 2011; 32 Suppl 3:S257-63. [PMID: 21703683 DOI: 10.1016/j.placenta.2011.05.011] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Revised: 05/26/2011] [Accepted: 05/27/2011] [Indexed: 10/18/2022]
Abstract
Embryo viability assessment is one of the most important and challenging tasks in IVF. Evaluation of embryo quality is critical when selecting the best embryo(s) to transfer or cryopreserve. Until recently, the only instrument used for embryo evaluation was the inverted light microscope, which provided information based on morphological characteristics. Developmental and morphological information gained from microscopic assessment have been positively associated with IVF outcomes, including pregnancy and implantation rates. However, based on general statistics, it is clear that IVF currently still results in relatively low pregnancy rates, while simultaneously being associated with relatively high multiple implantation rates. Only with novel embryo assessment and selection procedures would it be possible to improve these outcomes. Accordingly, it has been proposed that it is possible to test the culture environment of a developing embryo to gain valuable information regarding its viability. Different approaches have been used. These include the measurement of oxygen consumption by the embryo and testing of the soluble HLA-G in the environment, as it was proposed that secretion of HLA-G is associated with higher implantation rates. Amino acid turnover, which appears to be correlated to blastocyst development, can be measured as an indication of embryo viability. Other approaches, such as time-lapse video observation or cumulus cell gene expression analysis, may be used in the future to gain a broader understanding of embryo viability. Proteomics and metabolomics are also useful tools for assessment of embryo developmental potential. Results from recent studies on predicting embryo viability by analyzing the metabolome of different stage embryos are promising, as increases in pregnancy and implantation rates were obtained using the metabolomic profile for embryo selection. Several novel approaches are currently being developed to aid in viability assessment. These need to be evaluated in prospective clinical trials, while considering their practicality in the clinical laboratory.
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Affiliation(s)
- L Nel-Themaat
- Reproductive Biology Associates, 1150 Lake Hearn Dr., Suite 600, Atlanta, GA 30342, USA
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Makrigiannakis A, Petsas G, Toth B, Relakis K, Jeschke U. Recent advances in understanding immunology of reproductive failure. J Reprod Immunol 2011; 90:96-104. [PMID: 21683452 DOI: 10.1016/j.jri.2011.03.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 02/25/2011] [Accepted: 03/02/2011] [Indexed: 01/12/2023]
Abstract
Aspects of the immunological relationship between mother and conceptus still remain a mystery, although the recent advances in molecular biology have enlightened some of the parameters that participate in fetomaternal cross-talk during implantation. The atypical expression of major histocompatibility complex (MHC), the specific role of some hormones and cytokines, as well as the temporal and spatial distributions of uterine natural killer cells, represent substantive parameters of fetomaternal immunotolerance during implantation. Although human maternal and fetal immunology is difficult to investigate, aberrant immune responses and an imbalanced cytokine network may be related to infertility, implantation failures after IVF and recurrent pregnancy losses. In this review, immunological and interacting factors involved in human reproductive failure are summarized and critically evaluated.
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Affiliation(s)
- Antonis Makrigiannakis
- IVF Unit, Department of Obstetrics and Gynaecology, Medical School, University of Crete, 71110 Heraklion, Greece.
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21
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Mains LM, Christenson L, Yang B, Sparks AET, Mathur S, Van Voorhis BJ. Identification of apolipoprotein A1 in the human embryonic secretome. Fertil Steril 2011; 96:422-427.e2. [PMID: 21676393 DOI: 10.1016/j.fertnstert.2011.05.049] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 04/26/2011] [Accepted: 05/16/2011] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To identify factors secreted by the human embryo and correlate levels with embryo morphology and pregnancy outcome. DESIGN A laboratory-based study of human embryo protein synthesis and secretion and a retrospective analysis of spent embryo culture media as it relates to pregnancy outcome. SETTING University-based academic IVF program. PATIENT(S) IVF patients who had donated cryopreserved human pronuclear-stage embryos. Patients undergoing fresh IVF cycles resulting in a blastocyst transfer who donated spent media drops. INTERVENTION(S) In vitro embryo culture and collection of spent media. MAIN OUTCOME MEASURE(S) Protein analysis and identification by two-dimensional gel electrophoresis and mass spectrometry, ApoA1 quantification by ELISA, and mRNA analysis by quantitative reverse transcriptase-polymerase chain reaction. RESULT(S) By protein gel electrophoresis, apolipoprotein A1 (ApoA1) was increased in the culture media from good-quality blastocysts (n = 6 embryos) compared to either cleavage-arrested embryos (n = 6 embryos) or poor-quality blastocysts (n = 6 embryos) using spent media from culture days 4 and 5, respectively. Apolipoprotein A1 concentrations were 23.1% greater in day 5 spent culture media from good-grade blastocysts (n = 30) when compared to poor-grade embryos (n = 30). However, in a group of patients (n = 20) with transfer of two good-quality blastocysts, ApoA1 levels from day 5 spent media did not correlate with embryo implantation and pregnancy. Quantitative reverse transcriptase-polymerase chain reaction confirmed the presence of ApoA1 mRNA transcripts in human blastocysts. CONCLUSION(S) Apolipoprotein A1 is produced by human preimplantation embryos, and increased levels are present in spent culture media containing blastocysts of higher morphologic grade. These results suggest a role for lipoproteins in early embryologic development.
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Affiliation(s)
- Lindsay M Mains
- Department of Obstetrics & Gynecology, University of Iowa Hospitals & Clinics, Iowa City, Iowa, USA
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22
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Stamatkin CW, Roussev RG, Stout M, Absalon-Medina V, Ramu S, Goodman C, Coulam CB, Gilbert RO, Godke RA, Barnea ER. PreImplantation Factor (PIF) correlates with early mammalian embryo development-bovine and murine models. Reprod Biol Endocrinol 2011; 9:63. [PMID: 21569635 PMCID: PMC3112407 DOI: 10.1186/1477-7827-9-63] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2010] [Accepted: 05/15/2011] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND PreImplantation Factor (PIF), a novel peptide secreted by viable embryos is essential for pregnancy: PIF modulates local immunity, promotes decidual pro-adhesion molecules and enhances trophoblast invasion. To determine the role of PIF in post-fertilization embryo development, we measured the peptide's concentration in the culture medium and tested endogenous PIF's potential trophic effects and direct interaction with the embryo. METHODS Determine PIF levels in culture medium of multiple mouse and single bovine embryos cultured up to the blastocyst stage using PIF-ELISA. Examine the inhibitory effects of anti-PIF-monoclonal antibody (mAb) added to medium on cultured mouse embryos development. Test FITC-PIF uptake by cultured bovine blastocysts using fluorescent microscopy. RESULTS PIF levels in mouse embryo culture medium significantly increased from the morula to the blastocyst stage (ANOVA, P = 0.01). In contrast, atretic embryos medium was similar to the medium only control. Detectable - though low - PIF levels were secreted already by 2-cell stage mouse embryos. In single bovine IVF-derived embryos, PIF levels in medium at day 3 of culture were higher than non-cleaving embryos (control) (P = 0.01) and at day 7 were higher than day 3 (P = 0.03). In non-cleaving embryos culture medium was similar to medium alone (control). Anti-PIF-mAb added to mouse embryo cultures lowered blastocyst formation rate 3-fold in a dose-dependent manner (2-way contingency table, multiple groups, X2; P = 0.01) as compared with non-specific mouse mAb, and medium alone, control. FITC-PIF was taken-up by cultured bovine blastocysts, but not by scrambled FITC-PIF (control). CONCLUSIONS PIF is an early embryo viability marker that has a direct supportive role on embryo development in culture. PIF-ELISA use to assess IVF embryo quality prior to transfer is warranted. Overall, our data supports PIF's endogenous self sustaining role in embryo development and the utility of PIF- ELISA to detect viable embryos in a non-invasive manner.
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Affiliation(s)
| | | | - Mike Stout
- Louisiana State University Embryo Biotechnology Laboratory, LSU Agricultural Center, Baton Rouge, LA USA
| | - Victor Absalon-Medina
- Reproductive Medicine, Cornell University College of Veterinary Medicine, Ithaca, NY, USA
| | | | | | | | - Robert O Gilbert
- Reproductive Medicine, Cornell University College of Veterinary Medicine, Ithaca, NY, USA
| | - Robert A Godke
- Louisiana State University Embryo Biotechnology Laboratory, LSU Agricultural Center, Baton Rouge, LA USA
| | - Eytan R Barnea
- SIEP, Society for the Investigation of Early Pregnancy, Cherry Hill, NJ, USA
- Department of Obstetrics, Gynecology and Reproduction, UMDNJ-Robert Wood Johnson Medical School, Camden, NJ, USA
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An insight into normal and pathological pregnancies using large-scale microarrays: lessons from microarrays. J Reprod Immunol 2011; 89:163-72. [DOI: 10.1016/j.jri.2010.12.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Revised: 10/26/2010] [Accepted: 12/06/2010] [Indexed: 11/22/2022]
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Rizzo R, Vercammen M, van de Velde H, Horn PA, Rebmann V. The importance of HLA-G expression in embryos, trophoblast cells, and embryonic stem cells. Cell Mol Life Sci 2011; 68:341-52. [PMID: 21080028 PMCID: PMC11114702 DOI: 10.1007/s00018-010-0578-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Accepted: 10/22/2010] [Indexed: 10/18/2022]
Abstract
The nonclassical HLA-G molecule is a trophoblast-specific molecule present in almost every pregnancy. It differs from classical HLA class I molecules by the low degree of allelic variants and the high diversity of protein structures. HLA-G is reported to be a tolerogenic molecule that acts on cells of both innate and adaptive immunity. At the maternal-fetal interface HLA-G seems to be responsible largely for the reprogramming of local maternal immune response. This review will focus on the HLA-G gene expression profile in pregnancy, in preimplantation embryos, and in human embryonic stem cells with emphasis on the structural diversity of the HLA-G protein and its potential functional and diagnostic implications.
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Affiliation(s)
- Roberta Rizzo
- Department of Experimental and Diagnostic Medicine, Section of Medical Genetics, University of Ferrara, Ferrara, Italy
| | - Martine Vercammen
- Department of Hematology, Universitair Ziekenhuis (UZ) Brussel, Brussels, Belgium
| | - Hilde van de Velde
- Centre for Reproductive Medicine, Universitair Ziekenhuis (UZ) Brussel, Brussels, Belgium
- Department of Reproduction and Genetics, Universitair Ziekenhuis (UZ) Brussel, Brussels, Belgium
| | - Peter A. Horn
- Institute for Transfusion Medicine, University Hospital of Essen, Virchowstr. 179, 45122 Essen, Germany
| | - Vera Rebmann
- Institute for Transfusion Medicine, University Hospital of Essen, Virchowstr. 179, 45122 Essen, Germany
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25
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Dahl M, Hviid TVF. Human leucocyte antigen class Ib molecules in pregnancy success and early pregnancy loss. Hum Reprod Update 2011; 18:92-109. [DOI: 10.1093/humupd/dmr043] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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26
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Rebmann V, Switala M, Eue I, Grosse-Wilde H. Soluble HLA-G is an independent factor for the prediction of pregnancy outcome after ART: a German multi-centre study. Hum Reprod 2010; 25:1691-8. [DOI: 10.1093/humrep/deq120] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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27
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Shakhawat A, Shaikly V, Elzatma E, Mavrakos E, Jabeen A, Fernández N. Interaction between HLA-G and monocyte/macrophages in human pregnancy. J Reprod Immunol 2010; 85:40-6. [DOI: 10.1016/j.jri.2010.02.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2009] [Revised: 02/10/2010] [Accepted: 02/17/2010] [Indexed: 12/26/2022]
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28
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O'Gorman GM, Al Naib A, Naib AA, Ellis SA, Mamo S, O'Doherty AM, Lonergan P, Fair T. Regulation of a bovine nonclassical major histocompatibility complex class I gene promoter. Biol Reprod 2010; 83:296-306. [PMID: 20427761 DOI: 10.1095/biolreprod.109.082560] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Studies have shown in humans and other species that the major histocompatibility complex class I (MHC-I) region is involved at a number of levels in the establishment and maintenance of pregnancy. The aim of this study was to characterize how a bovine nonclassical MHC-I gene (NC1) is regulated. Initial serial deletion experiments of a 2-kb fragment of the NC1 promoter identified regions with positive regulatory elements in the proximal promoter and evidence for a silencer module(s) further upstream that cooperatively contributed to constitutive NC1 expression. The cytokines interferon tau (IFNT), interferon gamma (IFNG), and interleukin 4 (IL4) significantly increased luciferase expression in NC1 promoter reporter constructs and endogenous NC1 mRNA levels in a bovine endometrial cell line. In addition, IFNG, IL3, IL4, and progesterone significantly increased Day 7 bovine blastocyst NC1 mRNA expression when supplemented during in vitro embryo culture. Site-directed mutagenesis analysis identified a STAT6 binding site that conferred IL4 responsiveness in the NC1 proximal promoter. Furthermore, methylation treatment of the proximal promoter, which contains a CpG island, completely abrogated constitutive NC1 expression. Overall, the findings presented here suggest that constitutive NC1 expression is regulated positively by elements in the proximal promoter, which are further controlled by upstream silencer modules. The promoter is responsive to IFNT, IFNG, and IL4, suggesting possible roles for these cytokines in bovine preimplantation embryo survival and/or maternal-fetal tolerance. Our studies also suggest that methylation of the proximal promoter, in particular, could play a significant role in regulating NC1 expression.
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Affiliation(s)
- Grace M O'Gorman
- School of Agriculture, Food Science & Veterinary Medicine, University College Dublin, Belfield, Dublin, Ireland
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29
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Possible role of human leukocyte antigen–G molecules in human oocyte/embryo secretome. Hum Immunol 2009; 70:970-5. [DOI: 10.1016/j.humimm.2009.07.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2009] [Revised: 07/28/2009] [Accepted: 07/29/2009] [Indexed: 11/21/2022]
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30
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Royère D, Feuerstein P, Cadoret V, Puard V, Uzbekova S, Dalbies-Tran R, Teusan R, Houlgatte R, Labas V, Guérif F. Approches non invasives de l’embryon : protéomique, métabolomique, dialogue ovocyte-cumulus. ACTA ACUST UNITED AC 2009; 37:917-20. [DOI: 10.1016/j.gyobfe.2009.09.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Accepted: 09/03/2009] [Indexed: 10/20/2022]
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