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Jijo A, Munshi I, Uppangala S, Rajendran R, LakshmiKumar RVP, Kalthur G, Kovacic B, Sachdeva G, Adiga SK. Secretomes from Conventional Insemination and Intra-Cytoplasmic Sperm Injection Derived Embryos Differentially Modulate Endometrial Cells In Vitro. Reprod Sci 2024; 31:2080-2091. [PMID: 38472711 PMCID: PMC11217100 DOI: 10.1007/s43032-024-01504-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 02/22/2024] [Indexed: 03/14/2024]
Abstract
Conventional Insemination (CI) and Intra-Cytoplasmic Sperm Injection (ICSI) are routinely used insemination methods in clinical Assisted Reproductive Technologies (ART) settings. However, the existing data on the developmental competence and implantation potential of CI and ICSI derived embryos are not unequivocal. This prospective study on 23 patients undergoing ART treatment explored whether the secretomes of CI- and ICSI-derived embryo differentially alter the expression of integrins (αv and β3 integrin) and MUCIN-1 (MUC-1) in a human endometrial epithelial cell line (Ishikawa). Immunocytochemical data demonstrated that the secretome of CI-derived top quality (GI) embryos induced higher (p < 0.05) expression of ɑv β3 compared to sibling ICSI derived G1 embryos in Ishikawa cells. Though, relative levels of the transcript for MUC-1, anti-adhesion molecule did not show a significant difference between the study groups, immunocytochemical analysis demonstrated significantly (p < 0.0001) higher expression of MUC-1 in cells treated with ICSI-derived embryo secretome, compared to that treated with CI -derived embryo secretome. These results suggest that secretomes from CI and ICSI embryos differentially modulate the endometrial cells in vitro. This hints at differences in the ability of CI- and ICSI- derived embryos to alter endometrial profile.
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Affiliation(s)
- Ameya Jijo
- Centre of Excellence in Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal Manipal Academy of Higher Education, Manipal, 576 104, India
| | - Itti Munshi
- Cell Physiology and Pathology Laboratory, Indian Council of Medical Research - National Institute for Research in Reproductive and Child Health, Mumbai, India
| | - Shubhashree Uppangala
- Division of Reproductive Genetics, Department of Reproductive Science, Kasturba Medical College, Manipal. Manipal Academy of Higher Education, 576 104, Manipal, India
| | - Rithika Rajendran
- Cell Physiology and Pathology Laboratory, Indian Council of Medical Research - National Institute for Research in Reproductive and Child Health, Mumbai, India
| | - R Vani Pratap LakshmiKumar
- Department of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, 576104, India
- Department of Reproductive Medicine and Surgery, Kasturba Medical College, Manipal. Manipal Academy of Higher Education, 576 104, Manipal, India
| | - Guruprasad Kalthur
- Division of Reproductive Biology, Department of Reproductive Science, Kasturba Medical College, Manipal. Manipal Academy of Higher Education, 576 104, Manipal, India
| | - Borut Kovacic
- Department of Reproductive Medicine, University Medical Centre, Maribor, Maribor, Slovenia
| | - Geetanjali Sachdeva
- Cell Physiology and Pathology Laboratory, Indian Council of Medical Research - National Institute for Research in Reproductive and Child Health, Mumbai, India.
| | - Satish Kumar Adiga
- Centre of Excellence in Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal Manipal Academy of Higher Education, Manipal, 576 104, India.
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Bazer FW, Johnson GA. Early Embryonic Development in Agriculturally Important Species. Animals (Basel) 2024; 14:1882. [PMID: 38997994 PMCID: PMC11240814 DOI: 10.3390/ani14131882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/21/2024] [Accepted: 06/21/2024] [Indexed: 07/14/2024] Open
Abstract
The fertilization of oocytes ovulated by pigs, sheep, cows, and horses is not considered a limiting factor in successful establishment of pregnancy. Pig, sheep, and cow embryos undergo cleavage to the blastocyst stage, hatch from the zona pellucida, and undergo central-type implantation. Hatched blastocysts of pigs, sheep, and cows transition from tubular to long filamentous forms to establish surface area for exchange of nutrients and gases with the uterus. The equine blastocyst, surrounded by external membranes, does not elongate but migrates throughout the uterine lumen before attaching to the uterine luminal epithelium (LE) to begin implantation. Pregnancy recognition signaling in pigs requires the trophectoderm to express interleukin 1 beta, estrogens, prostaglandin E2, and interferon gamma. Sheep and cow conceptus trophectoderm expresses interferon tau that induces interferon regulatory factor 2 that inhibits transcription of estrogen and oxytocin receptors by uterine epithelia. This prevents oxytocin-induced luteolytic pulses of prostaglandin F2-alpha from regressing the corpora lutea, as well as ensuring the secretion of progesterone required for maintenance of pregnancy. The pregnancy recognition signal produced by equine blastocysts is not known. Implantation in these species requires interactions between extracellular matrix (ECM) proteins and integrins as the conceptus undergoes apposition and firm attachment to the uterine LE. This review provides details with respect to early embryonic development and the transition from spherical to filamentous conceptuses in pigs, sheep, and cows, as well as pre-implantation development of equine blastocysts and implantation of the conceptuses.
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Affiliation(s)
- Fuller W. Bazer
- Department of Animal Science, Texas A&M University, College Station, TX 77843-2471, USA
| | - Gregory A. Johnson
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843-2471, USA;
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Giri J, Modi D. Endometrial and placental stem cells in successful and pathological pregnancies. J Assist Reprod Genet 2023; 40:1509-1522. [PMID: 37338750 PMCID: PMC10352206 DOI: 10.1007/s10815-023-02856-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 06/03/2023] [Indexed: 06/21/2023] Open
Abstract
The endometrium is a dynamic tissue that undergoes extensive remodeling during the menstrual cycle and further gets modified during pregnancy. Different kinds of stem cells are reported in the endometrium. These include epithelial stem cells, endometrial mesenchymal stem cells, side population stem cells, and very small embryonic-like stem cells. Stem cells are also reported in the placenta which includes trophoblast stem cells, side population trophoblast stem cells, and placental mesenchymal stem cells. The endometrial and placental stem cells play a pivotal role in endometrial remodeling and placental vasculogenesis during pregnancy. The dysregulation of stem cell function is reported in various pregnancy complications like preeclampsia, fetal growth restriction, and preterm birth. However, the mechanisms by which it does so are yet elusive. Herein, we review the current knowledge of the different type of stem cells involved in pregnancy initiation and also highlight how their improper functionality leads to pathological pregnancy.
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Affiliation(s)
- Jayeeta Giri
- Molecular and Cellular Biology Laboratory, ICMR-National Institute for Research in Reproductive and child Health, Indian Council of Medical Research (ICMR), JM Street, Parel, Mumbai, 400012, India.
| | - Deepak Modi
- Molecular and Cellular Biology Laboratory, ICMR-National Institute for Research in Reproductive and child Health, Indian Council of Medical Research (ICMR), JM Street, Parel, Mumbai, 400012, India.
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Hooker AB, de Leeuw RA, Emanuel MH, Mijatovic V, Brolmann HAM, Huirne JA. The link between intrauterine adhesions and impaired reproductive performance: a systematic review of the literature. BMC Pregnancy Childbirth 2022; 22:837. [PMID: 36376829 PMCID: PMC9664654 DOI: 10.1186/s12884-022-05164-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 10/29/2022] [Indexed: 11/16/2022] Open
Abstract
Background Intrauterine adhesions (IUAs) are one of the main reproductive system diseases in women worldwide. Fusion between the injured opposing walls leads to partial-to-complete obliteration of the cavity and/or cervical canal. The main clinical manifestations in case of IUAs are menstrual disturbances, cyclic pain and reproductive disorders. The reproductive outcomes of women with IUAs remain limited and inefficient compared to women without IUAs, even after adhesiolysis. An exact understanding of the underlying mechanisms and processes to explain the compromised reproductive performance and outcomes in case of IUAs are lacking. Methods A systematic literature review of MEDLINE-PubMed (1966 to January 2022) and EMBASE (1974 to January 2022) was performed following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Studies were included if they reported underlying causes, related mechanisms and processes to explain the association between IUAs and impaired reproductive performance, pregnancy and obstetric complications. Results After an extensive review of the literature, 58 articles were identified reporting underlying mechanisms to explain the association between IUAs and impaired fertility. Intrauterine scarring influences the process of fertilization, reproductive performance and ultimately reproductive outcome. IUAs can disturb the cervico-utero-tubal sperm transport and result in an avascular and unresponsive endometrium with decreased receptivity and thickness. Abnormal decidualization and abnormal trophoblastic infiltration leads to placental attachment disorders. Moreover, the risk for premature delivery, intrauterine fetal growth restriction and fetal anomalies is increased in case of IUAs. Conclusion The impact of IUAs on reproductive performance, even after adhesiolysis, is becoming more apparent. The postulated mechanisms to explain the association are related to sperm transport, embryo implantation and placentation. Prevention, by preserving the basal layer of the endometrium is essential. Effective and evidence-based strategies for the prevention of endometrial injury and formation of IUAs, are urgently needed. Supplementary Information The online version contains supplementary material available at 10.1186/s12884-022-05164-2.
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Shinkai Y, Kuramochi M, Miyafusa T. New Family Members of FG Repeat Proteins and Their Unexplored Roles During Phase Separation. Front Cell Dev Biol 2021; 9:708702. [PMID: 34322491 PMCID: PMC8311347 DOI: 10.3389/fcell.2021.708702] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/17/2021] [Indexed: 12/26/2022] Open
Abstract
The condensation and compartmentalization of biomacromolecules in the cell are driven by the process of phase separation. The main effectors of phase separation are intrinsically disordered proteins, which include proteins with a phenylalanine-glycine (FG) repeat domain. Our understanding of the biological function of FG repeat proteins during phase separation has been mainly derived from recent research on a member of the nuclear pore complex proteins, nucleoporins containing FG repeat domain (FG-NUPs). FG-NUPs form meshwork structures by inter- and intra-molecular FG domain interactions, which confine the nucleo-cytoplasmic exchange. Whereas FG-NUPs localize in the nuclear membrane, other FG repeat proteins reside in the cytoplasm and the nucleoplasm, and the biological function of the FG repeat domain of these proteins is not well described. In the present review, we list the FG repeat proteins that are known to phase separate in the cell, and review their biological functions. We extract the unraveled features of FG repeat proteins as an activator of barrier formation and homotypic cell-cell interactions. Understanding the regulatory mechanisms of FG repeat proteins will provide a potential delivery tool for therapeutic reagents.
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Affiliation(s)
- Yoichi Shinkai
- Molecular Neurobiology Research Group, Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Masahiro Kuramochi
- Graduate School of Science and Engineering, Ibaraki University, Hitachi, Japan
| | - Takamitsu Miyafusa
- Bio-System Research Group, Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
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Fournier SB, D'Errico JN, Stapleton PA. Uterine Vascular Control Preconception and During Pregnancy. Compr Physiol 2021; 11:1871-1893. [PMID: 34061977 DOI: 10.1002/cphy.c190015] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Successful pregnancy and reproduction are dependent on adequate uterine blood flow, placental perfusion, and vascular responsivity to fetal demands. The ability to support pregnancy centers on systemic adaptation and endometrial preparation through decidualization, embryonic implantation, trophoblast invasion, arterial/arteriolar reactivity, and vascular remodeling. These adaptations occur through responsiveness to endocrine signaling and local uteroplacental mediators. The purpose of this article is to highlight the current knowledge associated with vascular remodeling and responsivity during uterine preparation for and during pregnancy. We focus on maternal cardiovascular systemic and uterine modifications, endometrial decidualization, implantation and invasion, uterine and spiral artery remodeling, local uterine regulatory mechanisms, placentation, and pathological consequences of vascular dysfunction during pregnancy. © 2021 American Physiological Society. Compr Physiol 11:1-23, 2021.
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Affiliation(s)
- Sara B Fournier
- Environmental and Occupational Health Sciences Institute, Piscataway, New Jersey, USA
| | - Jeanine N D'Errico
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
| | - Phoebe A Stapleton
- Environmental and Occupational Health Sciences Institute, Piscataway, New Jersey, USA.,Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
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Johnson GA, Bazer FW, Seo H. The Early Stages of Implantation and Placentation in the Pig. ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2021; 234:61-89. [PMID: 34694478 DOI: 10.1007/978-3-030-77360-1_5] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Pregnancy in pigs includes the events of conceptus (embryo/fetus and placental membranes) elongation, implantation, and placentation. Placentation in pigs is defined microscopically as epitheliochorial and macroscopically as diffuse. In general, placentation can be defined as the juxtapositioning of the endometrial/uterine microvasculature to the chorioallantoic/placental microvasculature to facilitate the transport of nutrients from the mother to the fetus to support fetal development and growth. Establishment of epitheliochorial placentation in the pig is achieved by: (1) the secretions of uterine glands prior to conceptus attachment to the uterus; (2) the development of extensive folding of the uterine-placental interface to maximize the surface area for movement of nutrients across this surface; (3) increased angiogenesis of the vasculature that delivers both uterine and placental blood and, with it, nutrients to this interface; (4) the minimization of connective tissue that lies between these blood vessels and the uterine and placental epithelia; (5) interdigitation of microvilli between the uterine and placental epithelia; and (6) the secretions of the uterine glands, called histotroph, that accumulate in areolae for transport though the placenta to the fetus. Placentation in pigs is not achieved by invasive growth of the placenta into the uterus. In this chapter, we summarize current knowledge about the major events that occur during the early stages of implantation and placentation in the pig. We will focus on the microanatomy of porcine placentation that builds off the excellent histological work of Amoroso and others and provide a brief review of some of the key physiological, cellular, and molecular events that accompany the development of "implantation" in pigs.
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Affiliation(s)
- Gregory A Johnson
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA.
| | - Fuller W Bazer
- Department of Animal Science, Texas A&M University, College Station, TX, USA
| | - Heewon Seo
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
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Ochoa-Bernal MA, Fazleabas AT. Physiologic Events of Embryo Implantation and Decidualization in Human and Non-Human Primates. Int J Mol Sci 2020; 21:E1973. [PMID: 32183093 PMCID: PMC7139778 DOI: 10.3390/ijms21061973] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/10/2020] [Accepted: 03/11/2020] [Indexed: 02/06/2023] Open
Abstract
Reproduction is a fundamental process for the preservation of the human species. This process requires a sequence of orchestrated events that are necessary for a successful pregnancy. Two of the most critical steps in the establishment of human pregnancy are implantation and decidualization, which are required for maternal interactions with the developing embryo. This review primarily highlights the physiological aspects of these two events and the adverse pregnancy outcomes from defective implantation and decidualization. The focus of this review is to provide a general concept of the mechanisms involved during the window of implantation, description of components involved in the process and possible pathologies that could disrupt the embryo implantation and decidualization and specifically as it applies to women and non-human primates.
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Affiliation(s)
- Maria Ariadna Ochoa-Bernal
- Department of Obstetrics, Gynecology & Reproductive Biology, Michigan State University, Grand Rapids, MI 49503, USA;
- Department of Animal Science, Michigan State University, East Lansing, MI 48824, USA
| | - Asgerally T. Fazleabas
- Department of Obstetrics, Gynecology & Reproductive Biology, Michigan State University, Grand Rapids, MI 49503, USA;
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Jalali BM, Lukasik K, Witek K, Baclawska A, Skarzynski DJ. Changes in the expression and distribution of junction and polarity proteins in the porcine endometrium during early pregnancy period. Theriogenology 2020; 142:196-206. [PMID: 31606658 DOI: 10.1016/j.theriogenology.2019.09.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 08/27/2019] [Accepted: 09/26/2019] [Indexed: 10/25/2022]
Abstract
The maternal endometrium undergoes transformations during early pregnancy period to regulate the paracellular permeability across the epithelium and to enable adhesion between the trophoblast and endometrial epithelial cells. These transformations, under the influence of ovarian hormones, are associated with a partial loss in polarity of epithelial cell that is regulated by tight junctions (TJ), adherens junctions (AJ) and associated polarity protein complexes. This study examined the change in expression and distribution of proteins associated with TJs, AJs and apical partition defective (PAR) complex in porcine endometrium on Days 10, 13 and 16 of estrous cycle and pregnancy. Moreover, effect of hormones, progesterone (P4) and 17-β estradiol (E2) on polar phenotype of endometrial epithelial cells was also investigated in vitro. There was pregnancy induced increase in gene and protein expression of TJ associated claudin-1 (CLDN1) on Day 13 of pregnancy as compared to corresponding day of estrous cycle and a decrease in TJ protein, zona occludens-1 (ZO-1) and PAR complex associated PAR6 expression levels on Day 16 of pregnancy (P < 0.05). Immunofluorescence studies revealed that on Days 10 and 13, TJ proteins occludin (OCLN) and ZO-1were primarily present in the apical region of lateral epithelial membrane. On Day 16 of pregnancy, whereas, OCLN redistributed into cytoplasm, ZO-1 decreased apically but was found to localize in the basal epithelium. The AJ proteins cadherin and β-catenin were located at the apical epithelium on Day 10 of estrous cycle and pregnancy and Day 13 of estrous cycle. On Days 13 and 16 of pregnancy both proteins were expressed in the lateral membrane and co-localization between these proteins was observed on Day 16. On Day 10, PAR complex proteins PAR3, cell division control protein 42 (CDC42) and atypical protein kinase C (aPKC) ζ were observed in apical epithelium and in lateral membrane and CDC42 was also present in the cytoplasm of epithelium. Pregnancy induced redistribution of aPKCζ to cytoplasm and CDC42 to apical surface of luminal epithelium was observed on Days 13 and 16. The in vitro P4 and E2 treatment of epithelial cells mimicked in vivo results. These results indicate that P4 and E2 regulate alterations in epithelium that may facilitate embryo implantation and given the role of cadherin, catenin and CDC42 in embryo invasion, change in distribution of these proteins may limit the invasiveness of porcine conceptuses into the stroma.
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Affiliation(s)
- Beenu Moza Jalali
- Division of Reproductive Biology, Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Tuwima 10, 10-748, Olsztyn, Poland.
| | - Karolina Lukasik
- Division of Reproductive Biology, Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Tuwima 10, 10-748, Olsztyn, Poland
| | - Krzysztof Witek
- Division of Reproductive Biology, Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Tuwima 10, 10-748, Olsztyn, Poland
| | - Agnieszka Baclawska
- Division of Reproductive Biology, Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Tuwima 10, 10-748, Olsztyn, Poland
| | - Dariusz J Skarzynski
- Division of Reproductive Biology, Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Tuwima 10, 10-748, Olsztyn, Poland
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Dudley JS, Murphy CR, Thompson MB, Lindsay LA, McAllan BM. Sex steroids influence the plasma membrane transformation in the uterus of the fat-tailed dunnart (Sminthopsis crassicaudata, Marsupialia). Reprod Fertil Dev 2019; 31:633-644. [PMID: 30449299 DOI: 10.1071/rd18202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 10/03/2018] [Indexed: 12/11/2022] Open
Abstract
The uterine epithelium undergoes remodelling to become receptive to blastocyst implantation during pregnancy in a process known as the plasma membrane transformation. There are commonalities in ultrastructural changes to the epithelium, which, in eutherian, pregnancies are controlled by maternal hormones, progesterone and oestrogens. The aim of this study was to determine the effects that sex steroids have on the uterine epithelium in the fat-tailed dunnart Sminthopsis crassicaudata, the first such study in a marsupial. Females were exposed to exogenous hormones while they were reproductively quiescent, thus not producing physiological concentrations of ovarian hormones. We found that changes to the protein E-cadherin, which forms part of the adherens junction, are controlled by progesterone and that changes to the desmoglein-2 protein, which forms part of desmosomes, are controlled by 17β-oestradiol. Exposure to a combination of progesterone and 17β-oestradiol causes changes to the microvilli on the apical surface and to the ultrastructure of the uterine epithelium. There is a decrease in lateral adhesion when the uterus is exposed to progesterone and 17β-oestradiol that mimics the hormone environment of uterine receptivity. We conclude that uterine receptivity and the plasma membrane transformation in marsupial and eutherian pregnancies are under the same endocrine control and may be an ancestral feature of therian mammals.
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Affiliation(s)
- Jessica S Dudley
- School of Medical Sciences and Bosch Institute, Anderson Stuart Building (F13), University of Sydney, Sydney, NSW 2006, Australia
| | - Christopher R Murphy
- School of Medical Sciences and Bosch Institute, Anderson Stuart Building (F13), University of Sydney, Sydney, NSW 2006, Australia
| | - Michael B Thompson
- School of Life and Environmental Science, Heydon-Laurence Building (A08), University of Sydney, Sydney, NSW 2006, Australia
| | - Laura A Lindsay
- School of Medical Sciences and Bosch Institute, Anderson Stuart Building (F13), University of Sydney, Sydney, NSW 2006, Australia
| | - Bronwyn M McAllan
- School of Medical Sciences and Bosch Institute, Anderson Stuart Building (F13), University of Sydney, Sydney, NSW 2006, Australia
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Song Y, Han J, Cao F, Ma H, Cao B, An X. Endometrial genome-wide DNA methylation patterns of Guanzhong dairy goats at days 5 and 15 of the gestation period. Anim Reprod Sci 2019; 208:106124. [PMID: 31405455 DOI: 10.1016/j.anireprosci.2019.106124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 05/05/2019] [Accepted: 07/12/2019] [Indexed: 12/29/2022]
Abstract
Uterine receptivity for the embryo is established and maintained through a series of precise cellular and molecular events, such as DNA methylation. There have been no studies to elucidate entire genome DNA methylation changes associated with embryo receptivity development of the endometrium (RE). In the present study, there was development of a complete genome-wide DNA methylome maps of the RE using whole-genome bisulphite sequencing and bioinformatics analysis. As many as 163.06 Gb of sequencing data averaging 81.53 Gb per sample were obtained for genome bisulphite sequencing of endometrium samples. There were distinct genome-wide DNA methylation patterns in pre-receptive endometrium (PE; Day 5 of gestation) and RE (Day 15 of gestation). There were as many as 16,467 differentially methylated regions (DMRs); 21,391 DMRs were less methylated in RE samples compared with PE samples (P-values ≤ 0.05 and |log2 (fold change)| ≥ 2). Compared with PE samples, methylation ratios of IGF2BP2, ACOX2, PTGDS, VEGFB and PTGDR2 genes were markedly less in RE samples (P-value ≤ 0.05 and |log2 (fold change)| ≥ 2). Conversely, in RE samples there was a markedly greater methylation ratio of IGFBP3 and IGF1R genes. The results of KEGG analysis indicated that these genes were involved in the signalling pathways for insulin, mitogen-activated protein kinase, gonadotropin-releasing hormone, vascular endothelial growth factor and progesterone-mediated oocyte maturation, which participated in differential regulation of goat endometrial development during receptive and prereceptive phases. The results of previous and the present study indicate resulting proteins of IGF2BP2, PTGDS, VEGFB, PGR, IGFBP3 and IGF1R gene expression may have important functions in regulating endometrial receptivity for the embryo.
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Affiliation(s)
- Yuxuan Song
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Jincheng Han
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Fangjun Cao
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Haidong Ma
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Binyun Cao
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Xiaopeng An
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
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Keshavarz L, Yavarian M. The association of Q472H variant in the KDR gene with recurrent pregnancy loss in Southern Iran: A case-control study. Int J Reprod Biomed 2019; 17:473-480. [PMID: 31508572 PMCID: PMC6718886 DOI: 10.18502/ijrm.v17i7.4858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 06/03/2018] [Accepted: 01/30/2019] [Indexed: 11/24/2022] Open
Abstract
Background Recurrent spontaneous abortion (RSA) often remains unclear and can be burden for the patient and time consuming for clinician. RSA may initiates from a genetic or non-genetic factors. It is well known that the quality of placental circulation is critical for implantation and embryo development. Because of angiogenic effects of VEGF–KDR pathway on placenta, the genes involved in this pathway (the KDR or VEGFR genes) are thought to be linked with RSA. Objective The aim of this study was to investigate the relationship between Gln472His (A/T) polymorphism of the KDR gene with RSAs in southern Iran. Materials and Methods In this case-control study, 50 aborted embryonic tissue obtained from fetuses and 50 umbilical cord blood of newborn babies were studied. Fetal sample from mothers with history of at least two consecutive miscarriages and controls from mothers who had at least one full-term infants born were taken. Genomic DNA was extracted by using PureLink genomic DNA kit (Life Technologies, CA). The Rotor-Gene Q real-Time PCR machine and High-resolution melting curve analysis (HRM) technique were used for genotyping. Results Based on the AA genotype as reference, it is shown that the T allele (OR = 2.447, 95% CI = 1.095–5.468, p = 0.029) as well as AT heterozygote genotype was significantly associated with an increased risk of miscarriage (OR = 2.824, 95% CI = 1.210-6.673, p = 0.016). Conclusion A positive correlation between Q472H polymorphism of the KDR gene and RSA may be the cause in southern Iran.
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Affiliation(s)
- Leila Keshavarz
- Department of Biology, Islamic Azad University, Arsanjan Branch, Arsanjan, Iran
| | - Majid Yavarian
- Shiraz Nephron-Urology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Tsuji M, Shibata E, Askew DJ, Morokuma S, Aiko Y, Senju A, Araki S, Sanefuji M, Ishihara Y, Tanaka R, Kusuhara K, Kawamoto T. Associations between metal concentrations in whole blood and placenta previa and placenta accreta: the Japan Environment and Children's Study (JECS). Environ Health Prev Med 2019; 24:40. [PMID: 31174461 PMCID: PMC6556030 DOI: 10.1186/s12199-019-0795-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 05/23/2019] [Indexed: 01/04/2023] Open
Abstract
Background Placenta previa and placenta accreta associate with high morbidity and mortality for both mothers and fetus. Metal exposure may have relationships with placenta previa and placenta accreta. This study analyzed the associations between maternal metal (cadmium [Cd], lead [Pb], mercury [Hg], selenium [Se], and manganese [Mn]) concentrations and placenta previa and placenta accreta. Methods We recruited 17,414 women with singleton pregnancies. Data from a self-administered questionnaire regarding the first trimester and medical records after delivery were analyzed. Maternal blood samples were collected to measure metal concentrations. The subjects were classified into four quartiles (Q1, Q2, Q3, and Q4) according to metal concentrations. Results The odds ratio for placenta previa was significantly higher among subjects with Q4 Cd than those with Q1 Cd. The odds ratio for placenta previa was significantly higher for subjects with Q2 Pb than those with Q1 Pb. Conclusion Participants with placenta previa had higher Cd concentrations. However, this study was cross-sectional and lacked important information related to Cd concentration, such as detailed smoking habits and sources of Cd intake. In addition, the subjects in this study comprised ordinary pregnant Japanese women, and it was impossible to observe the relationship between a wide range of Cd exposure and placenta previa. Therefore, epidemiological and experimental studies are warranted to verify the relationship between Cd exposure and pregnancy abnormalities. Electronic supplementary material The online version of this article (10.1186/s12199-019-0795-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mayumi Tsuji
- Department of Environmental Health, University of Occupational and Environmental Health, Kitakyushu, Japan.
| | - Eiji Shibata
- Department of Obstetrics and Gynecology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - David J Askew
- Department of Obstetrics and Gynecology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Seiichi Morokuma
- Research Center for Environmental and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yukiyo Aiko
- Department of Obstetrics and Gynecology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Ayako Senju
- Japan Environment and Children's Study, University of Occupational and Environmental Health Subunit Center, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan.,Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Shunsuke Araki
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Masafumi Sanefuji
- Research Center for Environmental and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yasuhiro Ishihara
- Laboratory of Molecular Brain Science, Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Japan
| | - Rie Tanaka
- Department of Environmental Health, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Koichi Kusuhara
- Japan Environment and Children's Study, University of Occupational and Environmental Health Subunit Center, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan.,Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Toshihiro Kawamoto
- Department of Environmental Health, University of Occupational and Environmental Health, Kitakyushu, Japan
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Bremer S, Brittebo E, Dencker L, Knudsen LE, Mathisien L, Olovsson M, Pazos P, Pellizzer C, Paulesu LR, Schaefer W, Schwarz M, Staud F, Stavreus-Evers A, Vähänkangas K. In Vitro Tests for Detecting Chemicals Affecting the Embryo Implantation Process. Altern Lab Anim 2019; 35:421-39. [PMID: 17850188 DOI: 10.1177/026119290703500407] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Susanne Bremer
- ECVAM, Institute for Health and Consumer Protection, European Commission Joint Research Centre, Ispra, Italy.
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15
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Shokrzadeh N, Alivand MR, Abedelahi A, Hessam Shariati MB, Niknafs B. Calcitonin administration improves endometrial receptivity via regulation of LIF, Muc-1 and microRNA Let-7a in mice. J Cell Physiol 2018; 234:12989-13000. [PMID: 30536902 DOI: 10.1002/jcp.27969] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 11/19/2018] [Indexed: 12/11/2022]
Abstract
Calcitonin (CT) is one of the factors affecting the embryo implantation, but its effects on the implantation window have not been fully investigated. The current study investigated the effects of CT on the endometrium receptivity by morphological study and evaluation of leukemia inhibitory factor (LIF), mucin 1 (Muc-1), and microRNA (miRNA) Let-7a in the ovarian stimulation and the normal ovarian cycle. Then the mechanism of the CT effects through the mammalian target of rapamycin (mTOR) signaling pathway was studied by using PP242. A total of 64 BALB/c mice were divided into the normal ovarian cycle and ovarian stimulation groups. Each group consisted of four subgroups: control, calcitonin, PP242, and calcitonin+PP242. CT and PP242 were injected on the fourth of pregnancy into the mice and 24 hr later all the mice were killed. The uterine tissue samples were used for morphological analysis, and endometrial cells were mechanically isolated for evaluation of gene and protein expression. The results showed that ovarian stimulation induced mTOR phosphorylation as well as increased expression of the Let-7a miRNA. In addition, CT injection increased the expression of LIF and miRNA Let-7a in ovarian stimulation similar to that in normal ovarian cycles. However, injection of PP242 reduced expression of miRNA Let-7a and increased Muc-1 expression in ovarian stimulation group. In conclusion, the administration of CT improved endometrial receptivity in mice. This phenomenon occurred by upregulation of LIF, miRNA Let-7a and downregulation of Muc-1 via mTOR signaling pathway.
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Affiliation(s)
- Naser Shokrzadeh
- Immunology Research Center, Faculty of medicine, Tabriz University Of Medical Sciences, Tabriz, Iran
| | - Mohammad Reza Alivand
- Department of Medical Genetics, Faculty of Medicine, Tabriz University of Medical Science, Tabriz, Iran
| | - Ali Abedelahi
- Department of Anatomical Sciences, Faculty of Medicine, Tabriz University of Medical Science, Tabriz, Iran
| | - Mohammad B Hessam Shariati
- Department of Anatomical Sciences, Faculty of Medicine, Tabriz University of Medical Science, Tabriz, Iran
| | - Behrooz Niknafs
- Department of Reproductive Biology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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16
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Tang M, You J, Wang W, Lu Y, Hu X, Wang C, Liu A, Zhu Y. Impact of Galectin-1 on Trophoblast Stem Cell Differentiation and Invasion in In Vitro Implantation Model. Reprod Sci 2017; 25:700-711. [PMID: 28826368 DOI: 10.1177/1933719117725816] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Trophoblast stem cells (TSCs) differentiate in an orderly manner, which plays an important role in the process of embryo implantation, placentation, and early pregnancy maintenance. At the maternal-fetal interface, the dialogue is crucial between trophoblast cells and endometrial epithelial cells. Previous studies suggested that galectin-1 (Gal-1) may play an important role in placental development. In this study, we used Ishikawa (IK) cells-TSC coculture model to simulate the maternal-fetal interface and induce the differentiation of TSCs by differentiation media. The messenger RNA level of each cell type markers, fusion markers, and Gal-1 was detected by quantitative reverse transcription polymerase chain reaction during the differentiation of TSCs. Wound healing and transwell invasion assays were used to detect the migration and invasion ability in each group. We found that coculture with IK cells or conditioned media from IK cells could promote the differentiation and invasion of TSCs and increase Gal-1 expression in TSCs. Furthermore, recombinant Gal-1 could also promote the differentiation and invasion of TSCs, suggesting that some of IK cells secretion increase the expression of Gal-1 in TSCs during implantation, which then induced trophoblast differentiation and invasion in vitro. These findings provide significant insights into the biology of embryo-maternal interactions with the importance of Gal-1 in TSCs for the successful establishment and maintenance of pregnancy.
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Affiliation(s)
- Minyue Tang
- 1 Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jiali You
- 1 Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Wei Wang
- 1 Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yongchao Lu
- 1 Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xiaoling Hu
- 1 Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Chunyan Wang
- 2 Division of Human Reproduction and Developmental Genetics, The Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,3 Department of Genetics, School of Medicine, Zhejiang University, Hangzhou, China
| | - Aixia Liu
- 1 Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yimin Zhu
- 1 Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
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Sarsmaz K, Goker A, Micili SC, Ergur BU, Kuscu NK. Immunohistochemical and ultrastructural analysis of the effect of omega-3 on embryonic implantation in an experimental mouse model. Taiwan J Obstet Gynecol 2017; 55:351-6. [PMID: 27343314 DOI: 10.1016/j.tjog.2016.04.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2015] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE Implantation is the first step to a healthy pregnancy. Omega-3 supplementation is common to use during pregnancy, for its antioxidant and membrane stabilising effect. In this study we have aimed to study the effect of Omega-3 supplementation on implantation in a mouse model by immunohistochemical methods and electron microscopic evaluation. MATERIALS AND METHODS Mice were randomized into three groups to receive standard food, Omega-3 400 mg/kg and Omega-3 1000 mg/kg one menstrual cycle before mating. Mice were sacrificed on third day of estimated implantation and uterine horns were evaluated immunohistochemically for staining of Laminin and Leukemia Inhibitory Factor (LIF) and ultrastructural morphology. RESULTS Laminin and LIF immunoreactivity were increased signifcantly in the high dose group when compared to the control and low-dose groups in lumen epithelium basal membrane, gland epithelium basal membrane and endometrial stroma. Electron-microscopic evaluation showed a decrease in epithelial height and microvilli loss in the high dose groups. CONCLUSION Omega-3 supplementation increased implantation markers Laminin and LIF and decreased epithelial height and microvilli thus seems to prepare the endometrium for a favorable environment of implantation.
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Affiliation(s)
- Kemal Sarsmaz
- Department of Obstetrics and Gynecology, Celal Bayar University Faculty of Medicine, Manisa, Turkey
| | - Asli Goker
- Department of Obstetrics and Gynecology, Celal Bayar University Faculty of Medicine, Manisa, Turkey.
| | - Serap Cilaker Micili
- Department of Histology and Embryology, Dokuz Eylul University Faculty of Medicine, Izmir, Turkey
| | - Bekir Ugur Ergur
- Department of Histology and Embryology, Dokuz Eylul University Faculty of Medicine, Izmir, Turkey
| | - Naci Kemal Kuscu
- Department of Obstetrics and Gynecology, Celal Bayar University Faculty of Medicine, Manisa, Turkey
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18
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Roles of Grp78 in Female Mammalian Reproduction. ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2017; 222:129-155. [PMID: 28389754 DOI: 10.1007/978-3-319-51409-3_7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The glucose-regulated protein (GRP78) also referred to as immunoglobulin heavy chain binding protein (Bip) is one of the best characterized endoplasmic reticulum (ER) chaperone proteins, which belongs to the heat-shock protein (HSP) family. GRP78 as a central regulator of ER stress (ERS) plays many important roles in cell survival and apoptosis through controlling the activation of transmembrane ERS sensors: PKR-like ER-associated kinase (PERK), inositol requiring kinase 1 (IRE1), and activating transcription factor 6 (ATF6). Many studies have reported that GRP78 is involved in the physiological and pathological process in female reproduction, including follicular development, corpus luteum (CL), oviduct, uterus, embryo, preimplantation development, implantation/decidualization, and the placenta. The present review summarizes the biological or pathological roles and signaling mechanisms of GRP78 during the reproductive processes. Further study on the functions and mechanisms of GRP78 may provide new insight into mammalian reproduction, which not only enhance the understanding of the physiological roles but also support therapy target against infertility.
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19
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Herington JL, Guo Y, Reese J, Paria BC. Gene profiling the window of implantation: Microarray analyses from human and rodent models. ACTA ACUST UNITED AC 2016; 2:S19-S25. [PMID: 28239559 DOI: 10.1016/j.jrhm.2016.11.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Poor uterine receptivity leads to implantation defects or failure. Identification of uterine molecules crucial to uterine receptivity and/or embryo implantation provides the opportunity to design a diagnostic screening toolkit for uterine receptivity or targeted drug discovery for treating implantation-based infertility. In this regard, gene-profiling studies performed in humans and rodents have identified numerous genes involved in the transcriptional regulation of uterine receptivity and embryo implantation. In this article, we compared available uterine microarray datasets collected during the time of uterine receptivity and implantation in humans, mice and hamsters to uncover conserved gene sets. We also compared the transcriptome signature of women with unexplained infertility (UIF) and recurrent implantation failure (RIF) to gain insight into genes potentially dysregulated during endometrial receptivity or embryo implantation. Among numerous differentially expressed genes, few were revealed that might have molecular diagnostic screening potential for identifying the uterine receptive state during the time of implantation. Finally, functional annotation of gene sets uncovered altered uterine apoptosis or cell adhesion pathways in women with UIF and RIF, respectively. These conserved or divergent gene sets provide insights into the uterine receptive state for supporting blastocyst implantation.
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Affiliation(s)
- Jennifer L Herington
- Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Yan Guo
- Department of Cancer Biology and Vanderbilt Technologies for Advanced Genomics Analysis and Research Design, Vanderbilt University, Nashville, TN 37232, USA
| | - Jeff Reese
- Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Bibhash C Paria
- Division of Neonatology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN 37232, USA
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20
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Integrins β1 and β3 are biomarkers of uterine condition for embryo transfer. J Transl Med 2016; 14:303. [PMID: 27782833 PMCID: PMC5080684 DOI: 10.1186/s12967-016-1052-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 10/05/2016] [Indexed: 11/10/2022] Open
Abstract
Background Clinical ovulation induction induces blood estrogen (E2) in excess of physiological levels, which can hinder uterine receptivity. In contrast, progesterone produces the opposite clinical effect, suggesting that it might be capable of recovering the lost receptivity resulting from exposure to high estrogen levels. Integrins are the most widely used biological markers for monitoring uterine conditions. We studied progesterone-induced changes in integrin β expression patterns as biomarkers for changes in uterine receptivity in response to increased estrogen levels. Methods Endometrial biopsy samples from patients were screened for their estrogen (E2) and progesterone (P4) content and expressing levels of integrin β1 and β3. Uterine receptivity was evaluated using human endometrial adenocarcinoma cells in an embryo attachment model. The respective and concatenated effects of embryo attachment and changes in the integrin β1 and β3 expression patterns on the adenocarcinoma cell plasma membranes in response to 100 nM concentrations of E2 and P4 were evaluated. Results Increased blood E2 concentrations were associated with significantly decreased the levels of integrin β3 expression in uterine biopsy samples. In vitro experiments revealed that a 100 nM E2 concentration inhibited the distribution of integrin β3 on the plasma membranes of human endometrial adenocarcinoma cells used in the embryo attachment model, and resulted in decreased rates of embryo attachment. In contrast, P4 enhanced the expression of integrin β1 and promoted its distribution on the plasma membranes. Furthermore, P4 recovered the embryo attachment efficiency that was lost by exposure to 100 nM E2. Conclusions Blood E2 and P4 levels and integrin β3 and β1 expression levels in uterine biopsy samples should be considered as biomarkers for evaluating uterine receptivity and determining the optimal time for embryo transfer. Trial registration Trial number: ChiCTR-TRC-13003777; Name of registry: Chinese Clinical Trial Registry; Date of registration: 4 September 2013; Date of enrollment of the first study participant: 15 October 2013 Electronic supplementary material The online version of this article (doi:10.1186/s12967-016-1052-0) contains supplementary material, which is available to authorized users.
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21
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Tu Z, Wang Q, Cui T, Wang J, Ran H, Bao H, Lu J, Wang B, Lydon JP, DeMayo F, Zhang S, Kong S, Wu X, Wang H. Uterine RAC1 via Pak1-ERM signaling directs normal luminal epithelial integrity conducive to on-time embryo implantation in mice. Cell Death Differ 2015; 23:169-81. [PMID: 26184908 DOI: 10.1038/cdd.2015.98] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 06/05/2015] [Accepted: 06/12/2015] [Indexed: 12/18/2022] Open
Abstract
Successful embryo implantation requires functional luminal epithelia to establish uterine receptivity and blastocyst-uterine adhesion. During the configuration of uterine receptivity from prereceptive phase, the luminal epithelium undergoes dynamic membrane reorganization and depolarization. This timely regulated epithelial membrane maturation and precisely maintained epithelial integrity are critical for embryo implantation in both humans and mice. However, it remained largely unexplored with respect to potential signaling cascades governing this functional epithelial transformation prior to implantation. Using multiple genetic and cellular approaches combined with uterine conditional Rac1 deletion mouse model, we demonstrated herein that Rac1, a small GTPase, is spatiotemporally expressed in the periimplantation uterus, and uterine depletion of Rac1 induces premature decrease of epithelial apical-basal polarity and defective junction remodeling, leading to disrupted uterine receptivity and implantation failure. Further investigations identified Pak1-ERM as a downstream signaling cascade upon Rac1 activation in the luminal epithelium necessary for uterine receptivity. In addition, we also demonstrated that Rac1 via P38 MAPK signaling ensures timely epithelial apoptotic death at postimplantation. Besides uncovering a potentially important molecule machinery governing uterine luminal integrity for embryo implantation, our finding has high clinical relevance, because Rac1 is essential for normal endometrial functions in women.
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Affiliation(s)
- Z Tu
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China.,University of the Chinese Academy of Sciences, Beijing 100039, PR China
| | - Q Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - T Cui
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China.,University of the Chinese Academy of Sciences, Beijing 100039, PR China
| | - J Wang
- Department of Pharmacology, Zhejiang University, Hangzhou 310058, PR China
| | - H Ran
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China.,State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100039, PR China
| | - H Bao
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China.,State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100039, PR China
| | - J Lu
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - B Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - J P Lydon
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - F DeMayo
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - S Zhang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - S Kong
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - X Wu
- Department of Pharmacology, Zhejiang University, Hangzhou 310058, PR China
| | - H Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
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22
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The roles of endoplasmic reticulum stress response in female mammalian reproduction. Cell Tissue Res 2015; 363:589-97. [PMID: 26022337 DOI: 10.1007/s00441-015-2212-x] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Accepted: 05/01/2015] [Indexed: 01/06/2023]
Abstract
Endoplasmic reticulum stress (ERS) activates a protective pathway, called the unfold protein response, for maintaining cellular homeostasis, but cellular apoptosis is triggered by excessive or persistent ERS. Several recent studies imply that the ERS response might have broader physiological roles in the various reproductive processes of female mammals, including embryo implantation, decidualization, preimplantation embryonic development, follicle atresia, and the development of the placenta. This review summarizes the existing data concerning the molecular and biological roles of the ERS response. The study of the functions of the ERS response in mammalian reproduction might provide novel insights into and an understanding of reproductive cell survival and apoptosis under physiological and pathological conditions. The ERS response is a novel signaling pathway for reproductive cell survival and apoptosis. Infertility might be a result of disturbing the ERS response during the process of female reproduction.
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23
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Amirchaghmaghi E, Rezaei A, Moini A, Roghaei MA, Hafezi M, Aflatoonian R. Gene expression analysis of VEGF and its receptors and assessment of its serum level in unexplained recurrent spontaneous abortion. CELL JOURNAL 2015; 16:538-45. [PMID: 25685744 PMCID: PMC4297492 DOI: 10.22074/cellj.2015.498] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2013] [Accepted: 02/16/2014] [Indexed: 11/09/2022]
Abstract
Objective Unexplained recurrent spontaneous abortion (URSA) is one of the main complications of pregnancy which is usually defined as three or more consecutive pregnancy
losses before the 20th week of gestation without a known cause. Vascular endothelial
growth factor (VEGF) is a potent angiogenic factor and shown, along with its receptors
(VEGFR1, 2), to play important roles in several physiologic processes including reproduction. The aim of the present study was to analyze gene expression of VEGF and VEGF
receptors in endometrium of patients with a history of URSA compared with normal fertile
women. In addition, serum VEGF concentration was assessed and compared between
the two groups at the same time.
Materials and Methods In this case control study, endometrial and blood samples were
obtained between day 19thand 24th of menstrual cycle (window of implantation) from 10
women with a history of URSA (case group) and 6 fertile women who had at least one
successful pregnancy (control group). Expression of VEGF and VEGFRs was studied by
reverse transcription- polymerase chain reaction (RT-PCR) and then quantified by real
time PCR. Normalization of expression levels was done by comparison with beta-actin
expression level as an internal control. Relative VEGF, VEGFR1 and VEGFR2 expression
quantities were compared between the two groups. Enzyme linked immunosorbent assay
(ELISA) was used for serum VEGF assay.
Results VEGF, VEGFR1 and VEGFR2 gene expression was detected in endometrial samples of both groups. The mean relative expression of VEGF gene was lower in the case group
compared with control women, however, both VEGF receptors were expressed higher in endometrium of the case group. In addition, the serum level of VEGF was significantly higher in the
case group compared with the controls.
Conclusion Alteration in gene expression of VEGF and its receptors in endometrium
and changes of serum VEGF might play important roles in pathogenesis of unexplained RSA.
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Affiliation(s)
- Elham Amirchaghmaghi
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran ; Department of Endocrinology and Female Infertility at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Abbas Rezaei
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ashraf Moini
- Department of Endocrinology and Female Infertility at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Mohammad Ali Roghaei
- Department of Gynecology and Obstetrics, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Maryam Hafezi
- Department of Endocrinology and Female Infertility at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Reza Aflatoonian
- Department of Endocrinology and Female Infertility at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
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Implantation and Establishment of Pregnancy in the Pig. REGULATION OF IMPLANTATION AND ESTABLISHMENT OF PREGNANCY IN MAMMALS 2015; 216:137-63. [DOI: 10.1007/978-3-319-15856-3_8] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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25
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Cha JM, Dey SK. Reflections on Rodent Implantation. REGULATION OF IMPLANTATION AND ESTABLISHMENT OF PREGNANCY IN MAMMALS 2015; 216:69-85. [DOI: 10.1007/978-3-319-15856-3_5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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26
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Johnson GA, Burghardt RC, Bazer FW. Osteopontin: a leading candidate adhesion molecule for implantation in pigs and sheep. J Anim Sci Biotechnol 2014; 5:56. [PMID: 25671104 PMCID: PMC4322467 DOI: 10.1186/2049-1891-5-56] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 11/25/2014] [Indexed: 11/10/2022] Open
Abstract
Osteopontin (OPN; also known as Secreted Phosphoprotein 1, SPP1) is a secreted extra-cellular matrix (ECM) protein that binds to a variety of cell surface integrins to stimulate cell-cell and cell-ECM adhesion and communication. It is generally accepted that OPN interacts with apically expressed integrin receptors on the uterine luminal epithelium (LE) and conceptus trophectoderm to attach the conceptus to the uterus for implantation. Research conducted with pigs and sheep has significantly advanced understanding of the role(s) of OPN during implantation through exploitation of the prolonged peri-implantation period of pregnancy when elongating conceptuses are free within the uterine lumen requiring extensive paracrine signaling between conceptus and endometrium. This is followed by a protracted and incremental attachment cascade of trophectoderm to uterine LE during implantation, and development of a true epitheliochorial or synepitheliochorial placenta exhibited by pigs and sheep, respectively. In pigs, implanting conceptuses secrete estrogens which induce the synthesis and secretion of OPN in adjacent uterine LE. OPN then binds to αvβ6 integrin receptors on trophectoderm, and the αvβ3 integrin receptors on uterine LE to bridge conceptus attachment to uterine LE for implantation. In sheep, implanting conceptuses secrete interferon tau that prolongs the lifespan of CL. Progesterone released by CL then induces OPN synthesis and secretion from the endometrial GE into the uterine lumen where OPN binds integrins expressed on trophectoderm (αvβ3) and uterine LE (identity of specific integrins unknown) to adhere the conceptus to the uterus for implantation. OPN binding to the αvβ3 integrin receptor on ovine trophectoderm cells induces in vitro focal adhesion assembly, a prerequisite for adhesion and migration of trophectoderm, through activation of: 1) P70S6K via crosstalk between FRAP1/MTOR and MAPK pathways; 2) MTOR, PI3K, MAPK3/MAPK1 (Erk1/2) and MAPK14 (p38) signaling to stimulate trohectoderm cell migration; and 3) focal adhesion assembly and myosin II motor activity to induce migration of trophectoderm cells. Further large in vivo focal adhesions assemble at the uterine-placental interface of both pigs and sheep and identify the involvement of sizable mechanical forces at this interface during discrete periods of trophoblast migration, attachment and placentation in both species.
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Affiliation(s)
- Greg A Johnson
- />Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843-4458 USA
| | - Robert C Burghardt
- />Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843-4458 USA
| | - Fuller W Bazer
- />Department of Animal Science, Texas A&M University, College Station, TX 77843 USA
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Poon CE, Lecce L, Day ML, Murphy CR. Mucin 15 is lost but mucin 13 remains in uterine luminal epithelial cells and the blastocyst at the time of implantation in the rat. Reprod Fertil Dev 2014; 26:421-31. [DOI: 10.1071/rd12313] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Accepted: 02/18/2013] [Indexed: 01/28/2023] Open
Abstract
The glycocalyx of the uterine luminal epithelium in the rat undergoes considerable reduction before implantation. In particular, the reduction of some mucins is necessary to facilitate blastocyst adhesion and subsequent implantation. The present study investigated the localisation, abundance and hormonal control of two mucin proteins, Muc13 and Muc15, in rat uterine epithelial cells during early pregnancy to determine whether they are likely to play a role in uterine receptivity for implantation. Muc13 and Muc15 are localised to the uterine luminal epithelium but show a presence and an absence, respectively, at the apical cell surface at the time of implantation. This localisation corresponds to changes in the molecular weights of Muc13 and Muc15, as shown with western blotting analysis. Furthermore, the localisation of Muc13 and Muc15 was shown to be controlled by the ovarian hormones, oestrogen and progesterone, and they were also localised in preimplantation rat blastocysts. Our results suggest that Muc15 may operate in an anti-adhesive capacity to prevent implantation while Muc13 potentially functions in either an adhesive or cell-signalling role in the events of implantation.
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Taylor J, Pampillo M, Bhattacharya M, Babwah AV. Kisspeptin/KISS1R signaling potentiates extravillous trophoblast adhesion to type-I collagen in a PKC- and ERK1/2-dependent manner. Mol Reprod Dev 2013; 81:42-54. [PMID: 24273038 DOI: 10.1002/mrd.22279] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 11/01/2013] [Indexed: 12/16/2022]
Abstract
During the first trimester of human pregnancy, cytotrophoblasts proliferate within the tips of the chorionic villi to form cell columns that anchor the placenta to the uterus. This migration coincides with a widespread change in the adhesion molecule repertoire of these trophoblasts. Kisspeptin and its receptor, KISS1R, are best known as potent triggers of gonadotropin-releasing hormone secretion. The kisspeptin/KISS1R signaling system is also highly expressed in the human placenta, where it was demonstrated to inhibit extra-villous trophoblast (EVT) migration and invasion in vitro. Here we show that kisspeptin, in a dose- and time-dependent manner, induces increased adhesion of human EVTs to type-I collagen, a major component of the human placenta. This increased adhesion was both rapid and transient, suggesting that it likely occurred through the activation of KISS1R secondary effectors such as PKC and ERK, which underwent rapid and transient kisspeptin-dependent activation in EVTs. We then showed that inhibition of both PKC and ERK1/2 attenuated the kisspeptin-dependent increase in EVT adhesion, suggesting that these molecules are key positive regulators of trophoblast adhesion. We therefore propose that kisspeptin/KISS1R signaling potentiates EVT adhesion to type-I collagen via "inside-out signaling." Furthermore, kisspeptin treatment increased mouse blastocyst adhesion to collagen I, suggesting that kisspeptin signaling is a key regulator of trophoblast function during implantation as well as early placentation.
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Affiliation(s)
- Jay Taylor
- The Children's Health Research Institute, London, Ontario, Canada; Lawson Health Research Institute, London, Ontario, Canada; Department of Physiology and Pharmacology, The University of Western Ontario, London, Ontario, Canada
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Yucha RW, Jost M, Rothstein D, Robertson N, Marcolongo MS. Quantifying the biomechanics of conception: L-selectin-mediated blastocyst implantation mechanics with engineered "trophospheres". Tissue Eng Part A 2013; 20:189-96. [PMID: 23927766 DOI: 10.1089/ten.tea.2013.0067] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
An estimated 12% of women in the United States suffer from some form of infertility. In vitro fertilization (IVF) is the most common treatment for infertility encompassing over 99% of all assisted reproductive technologies. However, IVF has a low success rate. Live birth rates using IVF can range from 40% in women younger than 35 years to 4% in women older than 42 years. Costs for a successful IVF outcome can be upward of $61,000. The low success rate of IVF has been attributed to the inability of the blastocyst to implant to the uterus. Blastocyst implantation is initiated by L-selectin expressing cells, trophoblasts, binding to L-selectin ligands, primarily sialyl Lewis X (sLeX), on the uterine surface endometrium. Legal and ethical considerations have limited the research on human subjects and tissues, whereas animal models are costly or do not properly mimic human implantation biochemistry. In this work, we describe a cellular model system for quantifying L-selectin adhesion mechanics. L-selectin expression was confirmed in Jeg-3, JAR, and BeWo cell lines, with only Jeg-3 cells exhibiting surface expression. Jeg-3 cells were cultured into three-dimensional spheres, termed "trophospheres," as a mimic to human blastocysts. Detachment assays using a custom-built parallel plate flow chamber show that trophospheres detach from sLeX functionalized slides with 2.75 × 10(-3) dyn of force and 7.5 × 10(-5) dyn-cm of torque. This work marks the first time a three-dimensional cell model has been utilized for quantifying L-selectin binding mechanics related to blastocyst implantation.
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Affiliation(s)
- Robert W Yucha
- 1 School of Biomedical Engineering, Drexel University , Philadelphia, Pennsylvania
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Yang Y, Jin Y, Martyn AC, Lin P, Song Y, Chen F, Hu L, Cui C, Li X, Li Q, Lu R, Wang A. Expression pattern implicates a potential role for luman recruitment factor in the process of implantation in uteri and development of preimplantation embryos in mice. J Reprod Dev 2013; 59:245-51. [PMID: 23400243 PMCID: PMC3934142 DOI: 10.1262/jrd.2012-137] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Luman/CREB3 recruitment factor (LRF or CREBRF) was identified as a regulator of Luman
(or CREB3) that is involved in the unfolded protein response during endoplasmic reticulum
stress. Luman is implicated in a multitude of functions ranging from viral infection and
immunity to cancer. The biological function of LRF, however, is unknown. In this paper, we
report that uteri of pregnant mice and embryos displayed enhanced LRF expression at all
stages, and the expressed LRF was found to be localized specifically at implantation
sites. On the other hand, uteri of mice induced for delayed implantation or pseudopregnant
mice showed low levels of LRF expression, suggesting that LRF mediates uterine receptivity
during implantation. Further, expression of LRF was found to be modulated by steroid
hormones such as progesterone and estradiol. This study thereby identifies a potential
role for LRF in the process of implantation in uteri and development of preimplantation
embryos in mice.
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Affiliation(s)
- Yanzhou Yang
- Key Open Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling Shaanxi 712100, PR China
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Guo B, Duan CC, Wang QY, Yue ZP. Differential expression and regulation of PNA and UEA-1 bindings in rabbit uterus during preimplantation period. Microsc Res Tech 2013; 76:398-403. [DOI: 10.1002/jemt.22179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Revised: 01/04/2013] [Accepted: 01/05/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Bin Guo
- College of Animal Science and Veterinary Medicine; Jilin University; Changchun; People's Republic of China
| | - Cui-Cui Duan
- Key Laboratory of Dairy Science, Northeast Agricultural University; Harbin; People's Republic of China
| | - Qu-Yuan Wang
- Department of Gynaecology and Obstetrics, the Second Hospital; Jilin University; Changchun; People's Republic of China
| | - Zhan-Peng Yue
- College of Animal Science and Veterinary Medicine; Jilin University; Changchun; People's Republic of China
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Zhang S, Lin H, Kong S, Wang S, Wang H, Wang H, Armant DR. Physiological and molecular determinants of embryo implantation. Mol Aspects Med 2013; 34:939-80. [PMID: 23290997 DOI: 10.1016/j.mam.2012.12.011] [Citation(s) in RCA: 351] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 12/25/2012] [Accepted: 12/26/2012] [Indexed: 01/19/2023]
Abstract
Embryo implantation involves the intimate interaction between an implantation-competent blastocyst and a receptive uterus, which occurs in a limited time period known as the window of implantation. Emerging evidence shows that defects originating during embryo implantation induce ripple effects with adverse consequences on later gestation events, highlighting the significance of this event for pregnancy success. Although a multitude of cellular events and molecular pathways involved in embryo-uterine crosstalk during implantation have been identified through gene expression studies and genetically engineered mouse models, a comprehensive understanding of the nature of embryo implantation is still missing. This review focuses on recent progress with particular attention to physiological and molecular determinants of blastocyst activation, uterine receptivity, blastocyst attachment and uterine decidualization. A better understanding of underlying mechanisms governing embryo implantation should generate new strategies to rectify implantation failure and improve pregnancy rates in women.
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Affiliation(s)
- Shuang Zhang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China; Graduate School of the Chinese Academy of Sciences, Beijing 100039, PR China
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Kaneko Y, Murphy CR, Day ML. Extracellular matrix proteins secreted from both the endometrium and the embryo are required for attachment: a study using a co-culture model of rat blastocysts and Ishikawa cells. J Morphol 2012; 274:63-72. [PMID: 22972746 DOI: 10.1002/jmor.20076] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2012] [Revised: 06/25/2012] [Accepted: 08/09/2012] [Indexed: 11/08/2022]
Abstract
Integrins are expressed in a highly regulated manner at the maternal-fetal interface during implantation. However, the significance of extracellular matrix (ECM) ligands during the integrin-mediated embryo attachment to the endometrium is not fully understood. Thus, the distribution of fibronectin in the rat uterus and blastocyst was studied at the time of implantation. Fibronectin was absent in the uterine luminal epithelial cells but was intensely expressed in the trophoblast cells and the inner cell mass suggesting that fibronectin secreted from the blastocyst may be a possible bridging ligand for the integrins expressed at the maternal-fetal interface. An Arg-Gly-Asp (RGD) peptide was used to block the RGD recognition sites on integrins, and the effect on rat blastocyst attachment to Ishikawa cells was examined. There was a significant reduction in blastocyst attachment when either the blastocysts or the Ishikawa cells were pre-incubated with the RGD-blocking peptide. Thus, successful attachment of the embryo to the endometrium requires the interaction of integrins on both the endometrium and the blastocyst with the RGD sequence of ECM ligands, such as fibronectin. Pre-treatment of both blastocysts and Ishikawa cells with the RGD peptide also inhibited blastocyst attachment, but not completely, suggesting that ECM bridging ligands that do not contain the RGD sequence are also involved in embryo attachment.
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Affiliation(s)
- Yui Kaneko
- Discipline of Anatomy and Histology, School of Medical Sciences and The Bosch Institute, The University of Sydney, Sydney, New South Wales 2006, Australia.
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Nimbkar-Joshi S, Katkam RR, Chaudhari UK, Jacob S, Manjramkar DD, Metkari SM, Hinduja I, Mangoli V, Desai S, Kholkute SD, Puri CP, Sachdeva G. Endometrial epithelial cell modifications in response to embryonic signals in bonnet monkeys (Macaca radiata). Histochem Cell Biol 2012; 138:289-304. [DOI: 10.1007/s00418-012-0951-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/27/2012] [Indexed: 10/28/2022]
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Li PT, Liao CJ, Yu LC, Wu WG, Chu ST. Localization of B4GALNT2 and its role in mouse embryo attachment. Fertil Steril 2012; 97:1206-12.e1-3. [PMID: 22401809 DOI: 10.1016/j.fertnstert.2012.02.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 02/15/2012] [Accepted: 02/15/2012] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To investigate the location of β-1,4-N-acetylgalactosaminyltransferase II (B4GALNT2) and the involvement of this protein and Sd(a) antigen in embryonic implantation. DESIGN Cell and animal study. SETTING University. ANIMAL(S) Adult outbred Institute for Cancer Research mice. INTERVENTION(S) B4GALNT2 antibody injected into the uteri of mice in early pregnancy; E3.5 blastocysts and pregnant uterine tissues were collected. MAIN OUTCOME MEASURE(S) Protein expression was detected by immunofluorescence staining and Western blotting. Embryo attachment was assayed via in vitro and in vivo embryo implantation models. RESULT(S) The b4galnt2 gene expression in the 293T cell line showed the protein localized in the plasma membrane. We confirmed that B4GALNT2 was localized on the surface of E3.5 blastocysts but was an intracellular component in uterine epithelia. Finally, anti-B4GALNT2 and lectins inhibition assays demonstrated the involvement of B4GALNT2 and Sd(a) antigen in embryonic attachment in vitro and in vivo via the mouse system and human endometrial cell line (Ishikawa). CONCLUSION(S) B4GALNT2 expressed in the blastocyst may interact with a ligand on the endometrial surface, perhaps via Sd(a) also, to permit embryo implantation. Our data suggest that B4GALNT2 and Sd(a) antigen are essential for embryo implantation.
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Affiliation(s)
- Pei-Tzu Li
- Institute of Bioinformatics and Structural Biology, National Tsing Hua University, Hsinchu, Taiwan
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Altmäe S, Reimand J, Hovatta O, Zhang P, Kere J, Laisk T, Saare M, Peters M, Vilo J, Stavreus-Evers A, Salumets A. Research resource: interactome of human embryo implantation: identification of gene expression pathways, regulation, and integrated regulatory networks. Mol Endocrinol 2011; 26:203-17. [PMID: 22074951 DOI: 10.1210/me.2011-1196] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
A prerequisite for successful embryo implantation is adequate preparation of receptive endometrium and the establishment and maintenance of a viable embryo. The success of implantation further relies upon a two-way dialogue between the embryo and uterus. However, molecular bases of these preimplantation and implantation processes in humans are not well known. We performed genome expression analyses of human embryos (n = 128) and human endometria (n = 8). We integrated these data with protein-protein interactions in order to identify molecular networks within the endometrium and the embryo, and potential embryo-endometrium interactions at the time of implantation. For that, we applied a novel network profiling algorithm HyperModules, which combines topological module identification and functional enrichment analysis. We found a major wave of transcriptional down-regulation in preimplantation embryos. In receptive-stage endometrium, several genes and signaling pathways were identified, including JAK-STAT signaling and inflammatory pathways. The main curated embryo-endometrium interaction network highlighted the importance of cell adhesion molecules in the implantation process. We also identified cytokine-cytokine receptor interactions involved in implantation, where osteopontin (SPP1), leukemia inhibitory factor (LIF) and leptin (LEP) pathways were intertwining. Further, we identified a number of novel players in human embryo-endometrium interactions, such as apolipoprotein D (APOD), endothelin 1 (END1), fibroblast growth factor 7 (FGF7), gastrin (GAST), kringle containing trnasmembrane protein 1 (KREMEN1), neuropilin 1 (NRP1), serpin peptidase inhibitor clade A member 3 (SERPINA3), versican (VCAN), and others. Our findings provide a fundamental resource for better understanding of the genetic network that leads to successful embryo implantation. We demonstrate the first systems biology approach into the complex molecular network of the implantation process in humans.
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Affiliation(s)
- Signe Altmäe
- Department of Clinical Science Intervention, and Technology, Division of Obstetrics and Gynaecology, Karolinska Institutet, Karolinska University Hospital Huddinge, 14186 Stockholm, Sweden.
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Kaneko Y, Day ML, Murphy CR. Integrin β3 in rat blastocysts and epithelial cells is essential for implantation in vitro: studies with Ishikawa cells and small interfering RNA transfection. Hum Reprod 2011; 26:1665-74. [PMID: 21531996 DOI: 10.1093/humrep/der128] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Integrins are involved in the process of embryo-endometrium interaction during implantation. We investigated the localization of integrin β3 in the rat blastocyst and Ishikawa cells using an in vitro co-culture model of implantation. METHODS Zona pellucida-free rat blastocysts were co-cultured with the Ishikawa cells (endometrial adenocarcinoma cell line) to observe the attachment between the embryo and endometrium. Immunofluorescence staining was used to investigate the localization of integrin β3 in rat embryos at different stages of development (each n= 3 embryos) and at the embryo/endometrium interface, observed by confocal microscopy. The Ishikawa cells were transfected with integrin β3 small interfering RNA (siRNA) for 48 h and then co-cultured with Day 5 rat blastocysts to observe the effect on attachment. RESULTS Integrin β3 staining in the rat embryos increased at the blastocyst stage being highly concentrated in the cytoplasm of trophoblast cells (n= 9 embryos). Integrin β3 was localized on the apical surface of the Ishikawa cells (n= 3 experiments). However, integrin β3 relocated to the apical membrane of trophoblast cells in response to attachment to Ishikawa cells (n= 6 embryos). Moreover, when Ishikawa cells were transfected with integrin β3 siRNA, blastocyst attachment was significantly reduced compared with those transfected with control siRNA (16.7 versus 92.3%, respectively, P< 0.05). CONCLUSIONS Integrin β3, localized apically in the blastocyst and the Ishikawa cells, is important during initial attachment of the blastocyst to endometrial cells. This study provides further evidence of the importance of integrins during implantation and may aid in elucidating the molecular mechanism of implantation failure and infertility in women.
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Affiliation(s)
- Yui Kaneko
- School of Medical Sciences, The University of Sydney, NSW 2006, Sydney, Australia
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Progesterone-regulated B4galnt2 expression is a requirement for embryo implantation in mice. Fertil Steril 2011; 95:2404-9, 2409.e1-3. [PMID: 21481371 DOI: 10.1016/j.fertnstert.2011.03.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 03/11/2011] [Accepted: 03/11/2011] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To investigate B4galnt2 gene regulation in the female mouse reproductive system (B4galnt2 encodes an enzyme, β1,4-N-acetylgalactosylaminyltransferase II, that catalyzes the addition of GalNAc to glycoproteins via a β1,4 linkage). DESIGN Experimental prospective study. SETTING Research institute and university. ANIMAL(S) Outbred Institute for Cancer Research (ICR) mice. INTERVENTION(S) Subcutaneous injection of P/E2; uterine tissues were collected after a 3-day injection period and were collected at different times during pregnancy. MAIN OUTCOME MEASURE(S) Gene expression was measured by quantitative real-time polymerase chain reaction after hormonal treatment of ovariectomized mice or pregnant mice. Primary endometrial cell cultivation and a gene promoter assay were used for P regulation analysis. The small interfering RNA (siRNA) technique was used to assess the gene function in embryo implantation in vivo. RESULT(S) Animal experiments, a primary endometrial cell cultivation assay, and a gene promoter assay indicated that B4galnt2 is regulated positively by P and negatively by estrogen. B4galnt2 was expressed in uterine tissue at peri-implantation (embryonic day 3.5) along with a sharp increase in placental P production at embryonic day 10.5, and declined as estrogen increased during pregnancy. Using the siRNA in vivo implantation assay, we have proved that B4galnt2 participated in embryonic implantation during pregnancy in mice. CONCLUSION(S) This study shows for the first time the expression of B4galnt2 in pregnant mice and its regulation by P. We conclude that the naturally occurring up-regulation of B4galnt2 during pregnancy contributes to normal embryo implantation but not to embryo development.
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Lewis Glyco-Epitopes: Structure, Biosynthesis, and Functions. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2011; 705:53-80. [DOI: 10.1007/978-1-4419-7877-6_4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Stoikos CJ, Salamonsen LA, Hannan NJ, O'Connor AE, Rombauts L, Dimitriadis E. Activin A regulates trophoblast cell adhesive properties: implications for implantation failure in women with endometriosis-associated infertility. Hum Reprod 2010; 25:1767-74. [DOI: 10.1093/humrep/deq097] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Singh H, Nardo L, Kimber SJ, Aplin JD. Early stages of implantation as revealed by an in vitro model. Reproduction 2010; 139:905-14. [DOI: 10.1530/rep-09-0271] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Our limited understanding of the processes underlying steroid hormonal control of human endometrial receptivity is largely due to the lack of a relevant model system. To overcome scarcity of material, we have developed a model in which mouse embryos attach to human Ishikawa cells, which express functional steroid hormone receptors. Blastocysts flushed from day 4 pregnant superovulated mice were transferred to confluent Ishikawa cell monolayers. After 48 h of co-culture, 85% of the blastocysts had attached loosely, but only 40% attached stably to the epithelial cell surface. In contrast, 95% of the embryos attached stably to tissue culture plastic. Thus, weak attachment of a majority of the embryos was followed by stronger adhesion of a smaller proportion. Seventeen percent of the transferred blastocysts modified the epithelial cell surface with loss of MUC1 at the attachment site, extending variably to adjacent epithelial cells. Initially, stable attachment occurred without disruption to the integrity of the epithelial monolayer, but at later stages after the embryo had spread laterally, displacement of subjacent cells was observed. A modest increase in stable attachment, but no changes to MUC1 clearance, was observed after assisted hatching. After 24 h priming of Ishikawa cells by 17β-oestradiol (OE2) followed by 72-h incubation with medroxyprogesterone acetate and OE2, stable attachment increased from 40 to 70%. Initial attachment is efficient either in the presence or in the absence of hormone; steroid treatment increased the incidence of stable attachment. Implantation failure is predicted to occur in this model when embryos fail to progress from initial to stable attachment.
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Shaw JLV, Dey SK, Critchley HOD, Horne AW. Current knowledge of the aetiology of human tubal ectopic pregnancy. Hum Reprod Update 2010; 16:432-44. [PMID: 20071358 DOI: 10.1093/humupd/dmp057] [Citation(s) in RCA: 203] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND An ectopic pregnancy is a pregnancy which occurs outside of the uterine cavity, and over 98% implant in the Fallopian tube. Tubal ectopic pregnancy remains the most common cause of maternal mortality in the first trimester of pregnancy. The epidemiological risk factors for tubal ectopic pregnancy are well established and include: tubal damage as a result of surgery or infection (particularly Chlamydia trachomatis), smoking and in vitro fertilization. This review appraises the data to date researching the aetiology of tubal ectopic pregnancy. METHODS Scientific literature was searched for studies investigating the underlying aetiology of tubal ectopic pregnancy. RESULTS Existing data addressing the underlying cause of tubal ectopic pregnancy are mostly descriptive. There are currently few good animal models of tubal ectopic pregnancy. There are limited data explaining the link between risk factors and tubal implantation. CONCLUSIONS Current evidence supports the hypothesis that tubal ectopic pregnancy is caused by a combination of retention of the embryo within the Fallopian tube due to impaired embryo-tubal transport and alterations in the tubal environment allowing early implantation to occur. Future studies are needed that address the functional consequences of infection and smoking on Fallopian tube physiology. A greater understanding of the aetiology of tubal ectopic pregnancy is critical for the development of improved preventative measures, the advancement of diagnostic screening methods and the development of novel treatments.
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Affiliation(s)
- J L V Shaw
- Centre for Reproductive Biology, Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
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Roberts JE, Nikolopoulos SN, Oktem O, Giancotti F, Oktay K. Integrin β-4 Signaling Plays a Key Role in Mouse Embryogenesis. Reprod Sci 2009; 16:286-93. [DOI: 10.1177/1933719108325506] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Jeffrey E. Roberts
- Pacific Centre for Reproductive Medicine, Burnaby, British Columbia, Canada
| | - Sotiris N. Nikolopoulos
- Cellular Biochemistry & Biophysics Program, Memorial Sloan-Kettering Cancer Center, New York
| | - Ozgur Oktem
- Departments of Obstetrics and Gynecology, New York Medical College, Valhalla, New York and Center for Human Reproduction, New York
| | - Filippo Giancotti
- Cellular Biochemistry & Biophysics Program, Memorial Sloan-Kettering Cancer Center, New York
| | - Kutluk Oktay
- Departments of Obstetrics and Gynecology, New York Medical College, Valhalla, New York and Center for Human Reproduction, New York,
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45
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Rahnama F, Thompson B, Steiner M, Shafiei F, Lobie PE, Mitchell MD. Epigenetic regulation of E-cadherin controls endometrial receptivity. Endocrinology 2009; 150:1466-72. [PMID: 18974268 DOI: 10.1210/en.2008-1142] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Key to the success of human reproduction is the capacity of an embryo to attach and implant into the endometrial wall after which a nutrient supply is established through placentation. Herein, we have examined the potential epigenetic regulation of uterine receptivity by use of the receptive RL95-2 and nonreceptive AN3-CA endometrial epithelial carcinoma cell lines. Using an in vitro model of embryo implantation, we demonstrate that inhibition of DNA methylation by 5'-aza-2'-deoxycytidine (AZA), resulted in the nonreceptive AN3-CA cell line becoming receptive to BeWo cell spheroid attachment. Examination of components of the adherens junction complex revealed that AZA specifically increased the expression of E-cadherin and plakoglobin at the mRNA and protein levels in AN3-CA cells, and E-cadherin protein expression was found to localize to sites of intercellular contact. Forced expression of E-cadherin in AN3-CA cells significantly enhanced receptivity. Small interfering RNA (siRNA)-mediated depletion of the individual DNA methyltransferase (DNMT) molecules did not induce E-cadherin expression in AN3-CA cells; however, concomitant siRNA-mediated depletion of both DNMT3A and DNMT3B induced the expression of E-cadherin. Furthermore, E-cadherin expression was significantly increased after the concomitant siRNA-mediated depletion of DNMT-1, -3A, and -3B in AN3-CA cells. Therefore, we have provided evidence that E-cadherin plays an important role in uterine receptivity and that E-cadherin expression is epigenetically regulated in AN3-CA cells, suppressed by the combined actions of DNMT-1, -3A, and -3B.
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Affiliation(s)
- Fahimeh Rahnama
- Faculty of Medical and Health Sciences, National Research Centre for Growth, Development and the Liggins Institute, University of Auckland, Private Bag, Auckland, New Zealand
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Salamonsen LA, Nie G, Hannan NJ, Dimitriadis E. Society for Reproductive Biology Founders' Lecture 2009. Preparing fertile soil: the importance of endometrial receptivity. Reprod Fertil Dev 2009; 21:923-34. [DOI: 10.1071/rd09145] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Accepted: 08/03/2009] [Indexed: 11/23/2022] Open
Abstract
The human endometrium is receptive for implantation of a blastocyst for only 4–5 days in each menstrual cycle. Failure of implantation is a major reason for infertility in women and the inability to achieve endometrial receptivity is responsible for much of the failure of reproductive technologies. Endometrial receptivity requires changes in the uterine luminal and glandular cells, particularly in terms of their secretory capacity and altered expression of adhesion molecules. In parallel with these changes, decidualisation (differentiation) of the endometrial stroma is initiated in women during the receptive phase, regardless of the presence of a blastocyst. Increased leucocyte numbers are also important. The microenvironments provided by the endometrium during the receptive phase and that support implantation are highly complex and constantly changing as implantation progresses. The present review provides a comprehensive overview of the cellular and molecular events of human implantation. It also summarises work from our laboratories emphasising the functional importance of proprotein convertase 6, along with key cytokines (interleukin-11, leukaemia inhibitory factor, activin A) and chemokines (including CX3CL1 and CCL14), during implantation. Of particular importance is how these mediators contribute to receptivity and how they are disturbed in infertile women. Factors that are critical for uterine receptivity may also be manipulated to provide new contraceptive strategies for women.
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47
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Park JE, Oh HJ, Hong SG, Jang G, Kim MK, Lee BC. Effects of activin A on the in vitro development and mRNA expression of bovine embryos cultured in chemically-defined two-step culture medium. Reprod Domest Anim 2008; 45:585-93. [PMID: 19090825 DOI: 10.1111/j.1439-0531.2008.01306.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The purpose of the present study was to evaluate the effects of activin A on the developmental competence of in vitro fertilized (IVF) bovine embryos derived from a two-step defined culture system (C1/C2 medium) during the early or later stages of embryo development. To evaluate the effects of activin A on transcriptional levels, we analysed genes related to blastocyst hatching and implantation and to activin signalling pathway in IVF embryos. Cumulus-oocyte complexes were matured for 22 h and fertilized in vitro. Presumptive zygotes were cultured in the presence or absence of activin A during early (0-120 h, C1) or later (120-192 h, C2) stages. Although the developmental competence of embryos cultured with activin A in C1 medium was not significantly different from their corresponding controls, development to blastocysts (22.4% vs 34.7%; p < 0.05) and the blastocyst hatching rate (9.3% vs 22.4%; p < 0.05) in C2 medium supplemented with 100 ng/ml activin A were significantly higher than in the control group. To evaluate the effect of activin A on transcription, the relative expression levels of genes related to blastocyst hatching and implantation (Na/K-ATPase, E-cad and Glut-1) as well as activin signalling pathway (ActRII, ActRIIB and Smad2) were analysed. Compared to control medium, gene expression of Na/K-ATPase, E-cad, Glut-1, ActRII and ActRIIB was increased in medium supplemented with activin A. In conclusion, this study suggests that activin A, during the later stage of in vitro bovine embryo development, can enhance in vitro development of embryos by increasing hatching rates and affecting expression levels of genes related to hatching and implantation in defined culture medium.
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Affiliation(s)
- J E Park
- Department of Theriogenology and Biotechnology, SeoulNational University, Seoul, Korea
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Kuo CW, Chen CM, Lee YC, Chu ST, Khoo KH. Glycomics and proteomics analyses of mouse uterine luminal fluid revealed a predominance of Lewis Y and X epitopes on specific protein carriers. Mol Cell Proteomics 2008; 8:325-42. [PMID: 18941134 DOI: 10.1074/mcp.m800320-mcp200] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Sperm motility and maturation are known to be affected by a host of factors encountered en route in both male and female genital tracts prior to fertilization. Using a concerted proteomics and glycomics approach with advanced mass spectrometry-based glycan sequencing capability, we show in this work that 24p3, an abundant mouse uterine luminal fluid (ULF) glycoprotein also called lipocalin 2 (Lcn2), is highly fucosylated in the context of carrying multiple Lewis X and Y epitopes on complex type N-glycans at its single glycosylation site. The predominance of Lewis X/Y along with Neu5Acalpha2-6 sialylation was found to be a salient feature of the ULF glycome, and several other protein carriers were additionally identified including the highly abundant lactotransferrin, which is N-glycosylated at two sites, both with a similar range of highly fucosylated N-glycans. A comparative glycomics analysis of the male genital tract fluids revealed that there is a gradient of glycomic complexity from the cauda to caput regions of the epididymis, varying from high mannose to sialylated complex type N-glycans but mostly devoid of fucosylation. The seminal vesicle fluid glycome, on the other hand, carries equally abundant multimeric Lewis X structures but is distinctively lacking in additional fucosylation of the terminal galactose to give the Lewis Y epitope typifying the glycome of female ULF. One-dimensional shotgun proteomics analysis identified over 40 proteins in the latter, many of which are reported for the first time, and a majority are notably involved in immune defense and antigen processing. Further sperm binding and motility assays suggest that the Lewis X/Y epitopes do contribute to the sperm motility-enhancing activity of 24p3, whereas lactotransferrin is largely inactive in this context despite being similarly glycosylated. These findings underline the importance of glycoproteomics in delineating both the specific glycan structures and their carriers in assigning glycobiological functions.
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Affiliation(s)
- Chu-Wei Kuo
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
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Implantation of the human embryo requires Rac1-dependent endometrial stromal cell migration. Proc Natl Acad Sci U S A 2008; 105:16189-94. [PMID: 18838676 DOI: 10.1073/pnas.0806219105] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Failure of the human embryo to implant into the uterine wall during the early stages of pregnancy is a major cause of infertility. Implantation involves embryo apposition and adhesion to the endometrial epithelium followed by penetration through the epithelium and invasion of the embryonic trophoblast through the endometrial stroma. Although gene-knockdown studies have highlighted several molecules that are important for implantation in the mouse, the molecular mechanisms controlling implantation in the human are unknown. Here, we demonstrate in an in vitro model for human implantation that the Rho GTPases Rac1 and RhoA in human endometrial stromal cells modulate invasion of the human embryo through the endometrial stroma. We show that knockdown of Rac1 expression in human endometrial stromal cells inhibits human embryonic trophoblast invasion into stromal cell monolayers, whereas inhibition of RhoA activity promotes embryo invasion. Furthermore, we demonstrate that Rac1 is required for human endometrial stromal cell migration and that the motility of the stromal cells increases at implantation sites. This increased motility correlates with a localized increase in Rac1 activation and a reciprocal decrease in RacGAP1 levels. These results reveal embryo-induced and localized endometrial responses that may govern implantation of the human embryo.
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Ni H, Yu XJ, Liu HJ, Lei W, Rengaraj D, Li XJ, Yang ZM. Progesterone regulation of glutathione S-transferase Mu2 expression in mouse uterine luminal epithelium during preimplantation period. Fertil Steril 2008; 91:2123-30. [PMID: 18692819 DOI: 10.1016/j.fertnstert.2008.04.053] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2008] [Revised: 04/22/2008] [Accepted: 04/22/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To investigate the differential expression and regulation of Gstm2 in mouse uterus during early pregnancy. DESIGN Experimental animal study. SETTING University research laboratory. ANIMAL(S) Sexually mature female Kunming white strain mice. INTERVENTION(S) Delayed and activated implantation, pseudopregnancy, hormonal treatment. MAIN OUTCOME MEASURE(S) The expression of Gstm2 mRNA was detected by in situ hybridization and reverse-transcription polymerase chain reaction (RT-PCR). RESULT(S) By in situ hybridization, there were a low level of Gstm2 expression in luminal epithelium on day 3 and a strong level in the luminal epithelium on day 4 during early pregnancy. The expression pattern of Gstm2 in the pseudopregnant uterus was similar to that during early pregnancy. By RT-PCR, Gstm2 was strongly detected in the uteri on days 3 and 4 of pregnancy and pseudopregnancy. Gstm2 expression was strongly detected in the luminal epithelium under delayed implantation, but not seen after delayed implantation was activated by estrogen. In the ovariectomized mouse uterus, Gstm2 expression was strongly up-regulated by progesterone via progesterone receptor. CONCLUSION(S) The results showed that Gstm2 was highly expressed in the uterine luminal epithelium during preimplantation period and up-regulated by progesterone.
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Affiliation(s)
- Hua Ni
- College of Life Science, Northeast Agricultural University, Harbin, People's Republic of China
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