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Embryo implantation failure

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https://www.readbyqxmd.com/read/29162091/role-of-micrornas-in-embryo-implantation
#1
REVIEW
Jingjie Liang, Shaoyu Wang, Zhengguang Wang
Failure of embryo implantation is a major limiting factor in early pregnancy and assisted reproduction. Determinants of implantation include the embryo viability, the endometrial receptivity, and embryo-maternal interactions. Multiple molecules are involved in the regulation of implantation, but their specific regulatory mechanisms remain unclear. MicroRNA (miRNA), functioning as the transcriptional regulator of gene expression, has been widely reported to be involved in embryo implantation. Recent studies reveal that miRNAs not only act inside the cells, but also can be released by cells into the extracellular environment through multiple packaging forms, facilitating intercellular communication and providing indicative information associated with physiological and pathological conditions...
November 21, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/29153978/the-endometria-of-women-with-endometriosis-exhibit-dysfunctional-expression-of-complement-regulatory-proteins-during-the-mid-secretory-phase
#2
Wilder A Palomino, Chandrakant Tayade, Felipe Argandoña, Luigi Devoto, Steven L Young, Bruce A Lessey
The control of complement activation within embryo-endometrium environment is critical for embryo survival. Cell evasion from complement attack requires interaction of complement regulatory proteins (CRPs) with cell adhesion αvβ3 integrin. We aim to compare the expression of CRPs in endometria of women with and without endometriosis and to examine the molecular interaction of decay accelerating factor (DAF) with αvβ3 integrin. Endometrial expression of Membrane cofactor protein (CD46), Decay accelerating factor (DAF), Membrane attack complex inhibitory factor (CD59) and β3 integrin subunit were determined through menstrual cycle by immunohistochemistry...
October 27, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/29132137/altered-circular-rna-expression-in-patients-with-repeated-implantation-failure
#3
Lin Liu, Lifei Li, Xiaoling Ma, Feng Yue, Yiqing Wang, Liyan Wang, Panpan Jin, Xuehong Zhang
BACKGROUND/AIMS: CircRNAs play an important role in regulating gene expression and the specific role of circRNAs in the pathogenesis of repeated implantation failure remains unclear. The aim of this study is to assess the differentially expressed circRNAs in patients with repeated implantation failure. METHODS: We screened circRNA expression profiles in endometrial biopsies taken from six women with repeated implantation failure and control group using circRNA microarray...
November 13, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29105394/melatonin-pretreated-blastocysts-along-with-calcitonin-administration-improved-implantation-by-upregulation-of-heparin-binding-epidermal-growth-factor-expression-in-murine-endometrium
#4
Fatemeh Moghani-Ghoroghi, Ghazaleh Moshkdanian, Mojtaba Sehat, Seyed Noureddin Nematollahi-Mahani, Iraj Ragerdi-Kashani, Parichehr Pasbakhsh
OBJECTIVES: Implantation failure is an obstacle in assisted reproduction techniques (ART). Calcitonin is a molecules involved in uterine receptivity and embryo implantation. Melatonin can promote embryo quality and improve implantation. This study examines the effect of pretreatment of blastocysts with melatonin and calcitonin on heparin binding-epidermal growth factor (HB-EGF) expression in murine endometrium. MATERIALS AND METHODS: In this experimental study, we collected 2-cell embryos from the oviducts of 1...
January 2018: Cell Journal
https://www.readbyqxmd.com/read/29104668/uterine-artery-blood-flow-and-microvessel-density-by-vaginal-color-doppler-ultrasonography-in-embryo-implantation-failure
#5
Zhen Li, Xingling Wang, Yichun Guan, Xiaona Yu, Jing Liu, Zhan Zhang
The purpose of this study was to investigate the clinical application of uterine artery blood flow parameters by vaginal color Doppler ultrasonography in patients with repeated embryo implantation failure and to examine the correlation between uterine artery blood flow parameters and microvessel density (MVD). We monitored the outcomes of in vitro fertilization and embryo transfer in eighty patients. We divided the patients into two groups: Pregnancy (successful pregnancy, n=50) and repeated implantation failure (more than two failures of in vitro fertilization-embryo transfer, n=30)...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29100537/extra-uterine-abdominal-full-term-foetus-in-a-15-day-pregnant-rabbit
#6
Francisco Marco-Jiménez, Ximo García-Domínguez, Jesús Valdes-Hernández, José Salvador Vicente
BACKGROUND: While ectopic pregnancies account for 1-2% of all pregnancies, abdominal pregnancy is extremely rare, accounting for approximately 1% of ectopic pregnancies. Extrauterine abdominal pregnancy is defined as the implantation and development of an embryo in the peritoneal cavity. The present report is the first of an incidental case of abdominal pregnancy within four full-term foetus simultaneously with 2 weeks of physiological gestation in a healthy doe rabbit. CASE PRESENTATION: The doe was born on November 3, 2014 and the first partum took place on May 18, 2015...
November 3, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29092905/estrogen-induces-egr1-to-fine-tune-its-actions-on-uterine-epithelium-by-controlling-pr-signaling-for-successful-embryo-implantation
#7
Hye-Ryun Kim, Yeon Sun Kim, Jung Ah Yoon, Seung Chel Yang, Mira Park, Dong-Won Seol, Sang Woo Lyu, Jin Hyun Jun, Hyunjung Jade Lim, Dong Ryul Lee, Haengseok Song
The harmonized actions of ovarian E2 and progesterone (P4) regulate the proliferation and differentiation of uterine cells in a spatiotemporal manner. Imbalances between these hormones often lead to infertility and gynecologic diseases. Whereas numerous factors that are involved in P4 signaling have been identified, few local factors that mediate E2 actions in the uterus have been revealed. Here, we demonstrate that estrogen induces the transcription factor, early growth response 1 (Egr1), to fine-tune its actions in uterine epithelial cells (ECs) that are responsible for uterine receptivity for embryo implantation...
November 1, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29063651/area-under-the-curve-of-temporal-estrogen-and-progesterone-measurements-during-assisted-reproductive-technology-which-hormone-is-the-main-determinant-of-cycle-outcome
#8
Enis Ozkaya, Tayfun Kutlu, Cigdem Abide Yayla, Semra Kayatas Eser, Ilhan Sanverdi, Belgin Devranoglu
AIM: Is there any relationship between estrogen and progesterone concentrations during assisted reproductive technology (ART)? Which hormone is the main determinant of impaired endometrial receptivity? METHODS: This study was conducted from July to December 2016 at the in vitro Fertilization/Intracytoplasmic Sperm Injection unit at Zeynep Kamil Women and Children's Health Training and Research Hospital. A total of 289 women who underwent ART were prospectively screened and areas under the curve of temporal estrogen (AUCEM) and progesterone measurements (AUCPM) were calculated for each participant...
October 24, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29063503/are-blastocyst-aneuploidy-rates-different-between-fertile-and-infertile-populations
#9
Jonathan D Kort, Rajiv C McCoy, Zach Demko, Ruth B Lathi
PURPOSE: This study aimed to determine if patients with infertility or recurrent pregnancy loss have higher rates of embryo aneuploidy than fertile controls. METHODS: This was a retrospective review of all pre-implantation genetic screening (PGS) cases processed by a single reference lab prior to March 2014 after a blastocyst biopsy. Cases were excluded if no indication for PGS was designated or patients were translocation carriers. The fertile control group consisted of patients undergoing IVF with PGS for sex selection only...
October 23, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29037556/transcutaneous-electrical-acupoint-stimulation-teas-treatment-improves-pregnancy-rate-and-implantation-rate-in-patients-with-implantation-failure
#10
Ya-Chiung Hsu, I-Ting Liang, Shang-Yu Huang, Hsin-Shih Wang, Yung-Kuei Soong, Chia-Lin Chang
OBJECTIVE: Although major advances have greatly improved the outcomes of assisted reproductive technology in the last two cascades, there remains significant difficulty in achieving pregnancy for many patients even after repeated attempts of IVF. Interestingly, recent studies have shown that transcutaneous electrical acupoint stimulation (TEAS) can improve the reproductive outcomes of select IVF patients. To determine the utility of TEAS in improving IVF outcomes in patients with a history of implantation failure, we conducted a retrospective study of clinical outcomes of women, who had a prior history of unsuccessful pregnancy outcome after IVF-embryo transfer (IVF-ET), following TEAS treatment...
October 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29036275/porcupine-dependent-wnt-activity-within-the-uterine-epithelium-is-essential-for-fertility
#11
Omar Farah, Steffen Biechele, Janet Rossant, Daniel Dufort
The secretion of mammalian Wnt ligands within the cell is dependent on the activity of Porcupine, a gene located on the X-chromosome that encodes for a membrane bound o-acyl transferase. Here, we report that post-natal ablation of Porcupine in the uterine luminal epithelium alone results in the decrease in endometrial gland number. Despite having uterine glands, mutant females are completely infertile. Epithelial ablation of Porcupine causes defects in timely apposition of the lumen, along with failure to respond to artificial decidual induction...
October 4, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29029020/the-endometrial-polarity-paradox-differential-regulation-of-polarity-within-secretory-phase-human-endometrium
#12
Sarah Whitby, Lois A Salamonsen, Jemma Evans
A major cause of infertility in normal and assisted reproduction cycles is failure of the endometrium to undergo appropriate changes during the secretory phase of the menstrual cycle as it acquires receptivity for an implanting blastocyst. Current dogma states that loss of epithelial polarity in the luminal epithelial cells, the point of first contact between maternal endometrium and blastocyst, may facilitate embryo implantation. Loss of polarity is likely an important change during the secretory phase to overcome mutual repulsion between otherwise polarised epithelial surfaces...
September 29, 2017: Endocrinology
https://www.readbyqxmd.com/read/29018572/enhanced-hoxa10-sumoylation-inhibits-embryo-implantation-in-women-with-recurrent-implantation-failure
#13
Ruiwei Jiang, Lijun Ding, Jianjun Zhou, Chenyang Huang, Qun Zhang, Yue Jiang, Jingyu Liu, Qiang Yan, Xin Zhen, Jianxin Sun, Guijun Yan, Haixiang Sun
HOXA10 has emerged as an important molecular marker of endometrial receptivity. Recurrent implantation failure (RIF) after in vitro fertilization-embryo transplantation (IVF-ET) treatment is associated with impaired endometrial receptivity, but the exact underlying mechanism of this phenomenon remains elusive. Here we found that HOXA10 was modified by small ubiquitin like-modifier 1 (SUMO1) at the evolutionarily conserved lysine 164 residue. Sumoylation inhibited HOXA10 protein stability and transcriptional activity without affecting its subcellular localization...
2017: Cell Death Discovery
https://www.readbyqxmd.com/read/28988928/preimplantation-genetic-screening-results-of-a-worldwide-web-based-survey
#14
Ariel Weissman, Gon Shoham, Zeev Shoham, Simon Fishel, Milton Leong, Yuval Yaron
Our objective was to evaluate and characterize the extent and patterns of worldwide usage of preimplantation genetic screening (PGS) among the assisted reproductive technique community. A prospective, web-based questionnaire with questions relating to practices of, and views on, PGS was directed to users and non-users of PGS. A total of 386 IVF units from 70 countries conducting 342,600 IVF cycles annually responded to the survey. A total of 77% of respondents routinely carry out PGS in their clinics for a variety of indications: advanced maternal age (27%), recurrent implantation failure (32%) and recurrent pregnancy loss (31%)...
September 21, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28971890/altered-mirna-profile-dependent-on-art-outcome-in-early-pregnancy-targets-wnt-pathway
#15
Alexander Freis, Andreas Keller, Nicole Ludwig, Eckart Meese, Julia Jauckus, Julia Rehnitz, Edison Capp, Thomas Strowitzki, Ariane Germeyer
Main goal of this study is to detect possible alterations in microRNA(miRNA)-expression and the pathway targeted in plasma at the time of embryo transfer and pregnancy testing dependent on the assisted reproductive treatment (ART) outcome after ovarian hyperstimulation for in vitro fertilization. Changes in miRNA-expression in plasma of women, who became pregnant (n=6) vs. women who failed implantation (n=6) following day 5 embryo transfer (ET), were investigated at day of ET and pregnancy testing (PT). Protein expression to validate the finding was performed with a sample size of n=20 (10 per group) using enzyme-linked immunosorbent assay...
September 29, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28969693/effects-of-melatonin-administration-on-embryo-implantation-and-offspring-growth-in-mice-under-different-schedules-of-photoperiodic-exposure
#16
Lu Zhang, Zhenzhen Zhang, Feng Wang, Xiuzhi Tian, Pengyun Ji, Guoshi Liu
BACKGROUND: Embryo implantation is crucial for animal reproduction. Unsuccessful embryo implantation leads to pregnancy failure, especially in human-assisted conception. Environmental factors have a profound impact on embryo implantation. Because people are being exposed to more light at night, the influence of long-term light exposure on embryo implantation should be explored. METHODS: The effects of long photoperiodic exposure and melatonin on embryo implantation and offspring growth were examined...
October 2, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28948440/should-intrauterine-human-chorionic-gonadotropin-infusions-ever-be-used-prior-to-embryo-transfer
#17
Michelle Volovsky, Martin Healey, Vivien MacLachlan, Beverley J Vollenhoven
PURPOSE: The aim of this study was to explore the factors that influence the outcome of intrauterine human chorionic gonadotropin (hCG) infusion at the time of embryo transfer (ET), in particular, the effect of hCG infusions on fresh and frozen embryo transfers (FETs) and whether prior recurrent implantation failure (RIF) impacts upon outcomes. METHOD: This was a case-control study based on a standardized database from a multi-site in vitro fertilization clinic...
September 25, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28921750/successful-treatment-with-intrauterine-delivery-of-dexamethasone-for-repeated-implantation-failure
#18
Tao Zhang, Chunyu Huang, Yan Du, Ruochun Lian, Meilan Mo, Yong Zeng, Gil Mor
PROBLEM: Effective therapy for endometrial receptivity of patients with repeated embryo implantation failure (RIF) is far undeveloped. Whether intrauterine perfusion of dexamethasone (DXM), local administration of drugs with less systematic side-effects, benefit for embryo implantation by suppressing uterine NK (uNK) cells to improve endometrial receptivity remains unknown. METHOD OF STUDY: Women with RIF were analyzed for the correlation between the percentage of uNK cells during implantation window and following clinical pregnancy rate to determine the appropriate range of uNK for embryo implantation...
December 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28916763/maternal-diabetes-causes-developmental-delay-and-death-in-early-somite-mouse-embryos
#19
Jing Zhao, Theodorus B M Hakvoort, Jan M Ruijter, Aldo Jongejan, Jan Koster, Sigrid M A Swagemakers, Aleksandar Sokolovic, Wouter H Lamers
Maternal diabetes causes congenital malformations and delays embryonic growth in the offspring. We investigated effects of maternal diabetes on mouse embryos during gastrulation and early organogenesis (ED7.5-11.5). Female mice were made diabetic with streptozotocin, treated with controlled-release insulin implants, and mated. Maternal blood glucose concentrations increased up to embryonic day (ED) 8.5. Maternal hyperglycemia induced severe growth retardation (approx.1 day) in 53% of the embryos on ED8.5, death in most of these embryos on ED9...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28904504/role-of-serpine-gene-polymorphism-in-recurrent-implantation-failure-and-preeclampsia
#20
Nidhi Sharma, Jayashree K Srinivasan, Margeret Harriet Priya, Venkatachalam Sibiya
This is a rare case of serpine gene polymorphism causing thrombophilia and recurrent implantation failure following intrauterine insemination. SERPINE1 gene encodes plasminogen activator inhibitor type 1 and inhibits fibrinolysis, or clot dissolution. The 4G variant results in increased expression of SERPINE1 and consequently higher inhibition of fibrinolysis, thus leading to thrombophilia. The patient had unexplained primary infertility for 9 years. Ovulation induction was done with gonadotropin releasing hormone (GnRH) agonist long protocol...
April 2017: Journal of Human Reproductive Sciences
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