Abstract：
:This study evaluated the effect of two oxygen concentrations (20 and 5%) on bovine embryo development (kinetics of first cleavage and blastocyst development) during maturation (M) and fertilization (F) and analysed differences in gene expression between cumulus-oocyte complexes (COC) matured at 5 or 20% oxygen and the resulting blastocysts. A total of 1179 COC were divided into four groups according to the oxygen tension used (M5F5, M5F20, M20F5 and M20F20). Relative poly(A) mRNA abundance of GLUT1, GAPDH, LDHA, G6PD, MNSOD, GPX1, IGFR2, BAX, CCNB1, PTGS2 and GREM1 was analysed in COC, whereas 10 quality-related genes were analysed in blastocysts. M20F5 group developmental rates were significantly lower than all other groups (one-way ANOVA, P < or = 0.05). Two-way ANOVA showed a beneficial effect of low oxygen tension during in-vitro maturation on developmental rates, whereas the opposite situation was obtained in fertilization (P < or = 0.05). GAPDH, IGFR2, CCNB1, and GREM1 were up-regulated in the oocytes matured in low oxygen, whereas GLUT1, GAPDH, LDHA and GREM1 were up-regulated and PTGS2 down-regulated in the cumulus cells from the M5 group (P < or = 0.05). No differences were observed in blastocysts. Low oxygen tension during maturation alters the expression of genes related to oocyte competence and glucose metabolism and significantly (P < or = 0.05) improves embryo development, but not blastocyst quality.
journal_name
Reprod Biomed Onlinejournal_title
Reproductive biomedicine onlineauthors
Bermejo-Alvarez P,Lonergan P,Rizos D,Gutiérrez-Adan Adoi
10.1016/j.rbmo.2009.12.006subject
Has Abstractpub_date
2010-03-01 00:00:00pages
341-9issue
3eissn
1472-6483issn
1472-6491pii
S1472-6483(09)00283-1journal_volume
20pub_type
杂志文章abstract：:Laparoscopic surgery with the assistance of the da Vinci robotic system has been recently introduced in gynaecology, as this new technology provides three-dimensional vision and easier suture capability. This study reports, for the first time, the case of an uncomplicated full term pregnancy after laparoscopic myomect...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)60794-8
更新日期：2007-02-01 00:00:00
abstract：:This study evaluated whether anti-Müllerian hormone (AMH) was differentially expressed in cumulus (CC) and granulosa (GC) cells from large antral and pre-ovulatory follicles collected from individual follicles in women undergoing in-vitro maturation (IVM) or IVF treatment. Expression studies of AMH, AMH receptor 2, FS...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2010.12.005
更新日期：2011-04-01 00:00:00
abstract：:The aim of this study was to determine the correlation between three-dimensional power Doppler sonography (3D-PDS) of the (sub)endometrium and concentrations of angiogenic cytokines in patients attending an IVF programme. A total of 42 patients was included in a prospective, non-randomized clinical study. 3D-PDS of th...
journal_title：Reproductive biomedicine online
pub_type： 临床试验,杂志文章
doi：10.1016/s1472-6483(10)60202-7
更新日期：2008-08-01 00:00:00
abstract：:Post-operative adhesions are a significant complication of all abdominal surgical procedures. The major strategies for adhesion prevention in gynaecological surgery are focused on the optimization of surgical technique and use of anti-adhesive agents, which fall into two main categories: pharmacological agents and bar...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/j.rbmo.2010.04.021
更新日期：2010-09-01 00:00:00
abstract：:Cross-border reproductive care (CBRC) is becoming increasingly common. Little is known about the motivations and information and support needs of people who cross borders to access surrogacy. This study aimed to explore: how those considering or undertaking extraterritorial surrogacy reach their decision; what other a...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2015.08.008
更新日期：2015-11-01 00:00:00
abstract：:This article attempts to capture the dynamics of return reproductive tourism to the Middle East, based on ethnographic research undertaken at four different Middle Eastern locales (Egypt, Lebanon, United Arab Emirates and Arab America). Across the Middle Eastern diaspora, which is now vast, due to the disruptions of w...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2011.08.006
更新日期：2011-11-01 00:00:00
abstract：:Recent studies have given conflicting results regarding growth in children born following assisted reproductive treatments up to the age of 18years. It has been suggested that children conceived via IVF may be taller than naturally conceived children and that this may due to subtle epigenetic alteration of imprinted g...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2009.10.006
更新日期：2010-01-01 00:00:00
abstract：:Gonadotrophin-releasing hormone agonist (GnRHa) administration from the mid-luteal phase onwards is considered the gold standard of ovarian stimulation for IVF treatment. It might, however, coincide with an implanting spontaneous pregnancy. Concerns have therefore been raised with regard to the evolution of the result...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61794-4
更新日期：2005-03-01 00:00:00
abstract：:This study investigated the effects of long-term (24h) in-vitro sperm incubation at room temperature (RT; 23°C) versus testis temperature (35°C) on various sperm-quality parameters. Semen samples (n=41) were prepared both by density-gradient centrifugation (DGC) and the swim-up technique in order to compare the influe...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2013.12.005
更新日期：2014-04-01 00:00:00
abstract：:The introduction to this review discusses briefly why immunology, perceived as difficult by assisted reproduction technology clinicians, need nevertheless be envisaged as a central actor in the reproduction process, and how the maternal immune system, initially perceived as a threat to the fetoplacental unit, is in fa...
journal_title：Reproductive biomedicine online
pub_type：
doi：10.1016/s1472-6483(10)60572-x
更新日期：2008-02-01 00:00:00
abstract：:Epigenetic alterations at several maternal loci have been associated with imprinting disorders in children conceived using assisted reproductive technologies. To date, epimutations at paternal loci have been observed in the spermatozoa of infertile men, but there is little evidence of paternal epimutations in babies c...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2010.02.025
更新日期：2010-06-01 00:00:00
abstract：:Long-chain 3-hydroxyacyl-CoA dehydrogenase (LCHAD) deficiency is a fatal autosomal recessive metabolic disorder, presenting during infancy. Preimplantation genetic diagnosis (PGD) provides an option for establishing an unaffected pregnancy, avoiding the risk for termination of pregnancy following prenatal diagnosis. T...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)62183-9
更新日期：2001-01-01 00:00:00
abstract：:This article reports the results from a study of couples participating in a research protocol in which IVF/preimplantation genetic diagnosis (PGD) was available for non-medical sex selection. The study sought to characterize the moral attitudes and beliefs of couples actively pursuing IVF/PGD solely for purposes relat...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2010.09.009
更新日期：2010-12-01 00:00:00
abstract：:Today an accurate diagnosis of adenomyosis can be made thanks to progress in imaging techniques: sonography and magnetic resonance imaging (MRI). This has made it possible to clinically correlate the presence of adenomyosis to infertility. At the same time, a series of pathogenetic hypotheses have been presented to ex...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/j.rbmo.2011.10.003
更新日期：2012-01-01 00:00:00
abstract：:Failed fertilization after intracytoplasmic sperm injection (ICSI) can occur due to an oocyte activation defect. In these cases assisted oocyte activation (AOA) may help but efficiency is still unknown. Prior to AOA, the mouse oocyte activation test (MOAT) can be carried out by injecting human spermatozoa into mouse o...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)60313-6
更新日期：2008-11-01 00:00:00
abstract：RESEARCH QUESTION:Does the quality of transferred embryos have an impact on the rate of congenital malformations in IVF/intracytoplasmic sperm injection (ICSI)-conceived babies? DESIGN:Retrospective cohort study involving 6637 pregnancies of ≥20 weeks' gestation from women undergoing embryo transfer with a single Day ...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2019.07.035
更新日期：2019-12-01 00:00:00
abstract：:The use of a gonadotrophin-releasing hormone (GnRH) agonist to trigger final oocyte maturation in a GnRH antagonist protocol has been associated with poorer clinical outcomes due to an increased luteal-phase defect. It has been shown that LH activity is crucial in a normal luteal phase. Studies assessing the LH concen...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2013.10.019
更新日期：2014-03-01 00:00:00
abstract：:The aim of this study was to determine if assisted hatching (AH) could improve the rates of pregnancy and implantation for both fresh and frozen-thawed embryo transfer cycles. A total of 760 fresh embryo transfer cycles and 200 frozen-thawed embryo transfer cycles were randomly assigned to either the treatment group (...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/s1472-6483(10)60466-x
更新日期：2008-04-01 00:00:00
abstract：:This study evaluated the cost-effectiveness of treatments for women with polycystic ovary syndrome (PCOS) who ovulate on clomiphene citrate but do not conceive after six cycles. A decision-analytic framework was developed for six scenarios: (1) three cycles of IVF; (2) continuation of clomiphene citrate for six cycles...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2014.01.014
更新日期：2014-05-01 00:00:00
abstract：:While the role of inherited thrombophilia has been accepted as a cause of recurrent late pregnancy complications, the contribution of mutated thrombophilic genes to implantation failure has not been studied. Proteins involved in fibrinolysis are necessary for trophoblast invasion into the endometrium. This study compa...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61004-8
更新日期：2006-03-01 00:00:00
abstract：:Recurrent pregnancy loss (RPL) is defined by two or more failed pregnancies and accounts for only 1-5% of pregnancy failures. Treatment options for unexplained RPL (uRPL) are limited. Previous studies suggest a link between delayed implantation and pregnancy loss. Based on this, a timely signal for rescue of the corpu...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2016.11.016
更新日期：2017-03-01 00:00:00
abstract：:Participation in external quality control (EQC) programmes is recommended by various scientific societies. Results from an EQC programme for embryology laboratories are presented. This 5-year programme consisted of the annual delivery of (i) materials to test toxicity and (ii) a DVD/CD-ROM with images of zygotes and e...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2009.09.033
更新日期：2010-01-01 00:00:00
abstract：:The objective of this review is to analyse and integrate into a semi-historical background the alternative treatments available for the alleviation of infertility. Data are presented on their causes and success, using compilations of data reported in the literature along with personal experience. Results are expressed...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/s1472-6483(10)61601-x
更新日期：2002-07-01 00:00:00
abstract：RESEARCH QUESTION:What ethical implications, issues and concerns play a role in conducting follow-up studies of children born after assisted reproductive technologies (ART)? DESIGN:Literature study and relevant experiences of academic medical centres in Brussels, Belgium, and Maastricht, the Netherlands were used to i...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2020.08.033
更新日期：2020-12-01 00:00:00
abstract：:The aim of this research was to ascertain how the opportunities now open by the Greek legislation regarding assisted reproduction fits with Greek society and how it compares with the wider EU legal framework. A revision of the Greek legislation took place a few years ago, with two new Acts. The different issues that a...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2011.07.024
更新日期：2011-12-01 00:00:00
abstract：:Reactive oxygen species (ROS) have a negative impact on sperm DNA, leading to the formation of oxidative products such as 8-oxo-7,8-dihydroxyguanosine. This compound causes fragmentation and, thus, has a mutagenic effect. Patient treatment with oral antioxidant vitamins is, therefore, standard practice for male infert...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,多中心研究
doi：10.1016/s1472-6483(10)60887-5
更新日期：2007-04-01 00:00:00
abstract：:Recurrent pregnancy loss (RPL) has been associated with low expression of apoptosis-and angiogenesis-related genes. The p53 tumour suppressor gene has been shown to induce apoptosis and angiogenesis. Recently, a low increased frequency of a p53 codon 72 polymorphism has been reported among women experiencing RPL. This...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61013-9
更新日期：2006-03-01 00:00:00
abstract：:Nuclei of mature mammalian spermatozoa are extraordinarily resistant to chemical and thermal injury. Additionally, decondensation of spermatozoa DNA can be accompanied by little or no visual changes of the sperm head. This study tested whether human spermatozoa could be recovered following several cycles of primer ext...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61882-2
更新日期：2003-10-01 00:00:00
abstract：:Polycystic ovary syndrome (PCOS) affects 5-10% of women of reproductive age and is the most common cause of anovulatory infertility. The treatment approaches to ovulation induction vary in efficacy, treatment duration and patient friendliness. The aim was to determine the most efficient, evidence-based method to achie...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/j.rbmo.2016.03.006
更新日期：2016-06-01 00:00:00
abstract：:Preimplantation genetic diagnosis (PGD) for chromosomal disorders is currently performed by interphase fluorescence in-situ hybridization (FISH) analysis. This technique is known to have limitations for detecting some translocations and complete karyotyping, so visualization of chromosomes in single cells is required ...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61836-6
更新日期：2002-11-01 00:00:00
