Abstract:
:Within the context of an oocyte in vitro maturation (IVM) program for reproductive treatment, oocyte cumulus complexes (COCs) derived from follicles <6 mm in patients with PCOS were matured in vitro. Key transcripts related to meiotic maturation (FSHR, LHCGR, EGFR, PGR) and oocyte competence (AREG, ADAMTS, HAS2, PTGS2) were quantified in cumulus cells (CCs) before and after maturation. Control CC samples were collected from PCOS and normo-ovulatory patients who had undergone conventional gonadotrophin stimulation for IVF/ICSI. Additional control samples from a non-stimulated condition were obtained ex vivo from patients undergoing ovariectomy for fertility preservation. Expression data from CCs from follicles with a diameter of <6 mm before (IVM-CCs) and after in vitro maturation (IVM-CCs) were obtained after pooling CCs into four groups in relation to the percentage of matured (MII) oocytes obtained after 40 h of IVM (0; 40-60; 61-80; 100% MII) and values were compared with in vivo matured controls (IVO-CCs). Genes encoding key receptors mediating meiotic resumption are expressed in human antral follicles of <6 mm before and after IVM. The expression levels of FSHR, EGFR and PGR in CCs were significantly down-regulated in the IVO-CCs groups and in the 100% MII IVM group compared with the BM groups; all the receptors studied in the 100% MII IVM group reached an expression profile similar to that of IVO-CCs. However, after maturation in a conventional IVF/ICSI cycle, IVO-CCs from large follicles contained significantly increased levels of ADAMTS1, AREG, HAS2 and PTGS2 compared with IVM-CCs and IVM-CCs; the expression patterns for these genes in all IVM-CCs were unchanged compared with IVM-CCs. In conclusion, genes encoding receptors involved in oocyte meiotic resumption appeared to be expressed in CCs of small human antral follicles. Expression levels of genes-encoding factors reflecting oocyte competence were significantly altered in IVM-CCs compared with in vivo matured oocytes from large follicles. Observed differences might be explained by the different stimulation protocols, doses of gonadotrophin or by the intrinsic differences between in vivo and in vitro maturation.
journal_name
Mol Hum Reprodjournal_title
Molecular human reproductionauthors
Guzman L,Adriaenssens T,Ortega-Hrepich C,Albuz FK,Mateizel I,Devroey P,De Vos M,Smitz Jdoi
10.1093/molehr/gas038subject
Has Abstractpub_date
2013-01-01 00:00:00pages
7-16issue
1eissn
1360-9947issn
1460-2407pii
gas038journal_volume
19pub_type
杂志文章abstract::Prostaglandin E2 (PGE2) plays a key role in the maintenance of human pregnancy and labour onset. PGE2 can elicit diverse actions within the uterus depending on the PGE2 receptors (EP1, EP2, EP3 and EP4) expressed. By signalling through different intracellular pathways the EP receptors may inhibit or promote smooth mus...
journal_title:Molecular human reproduction
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abstract::A novel gene, TSG23/Tsg23, was identified by comparing the expression profiles of human adult and fetal testis using Affymetrix Genechips. RT-PCR analysis from multiple human and mouse tissues indicated TSG23/Tsg23 mRNA was mainly expressed in the testis. In situ hybridization revealed that TSG23/Tsg23 mRNA was locate...
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abstract::Oligozoospermia (low sperm count) is a common semen deficiency. However, to date, few genetic defects have been identified to cause this condition. Moreover, even fewer molecular genetic diagnostic tests are available for patients with oligozoospermia in the andrology clinic. Based on animal and gene expression studie...
journal_title:Molecular human reproduction
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abstract::We report an improvement in the PGD test for fragile X syndrome (FXS). Recently, multiple displacement amplification (MDA) has been reported to yield large amounts of DNA from single cells. Taking into account this technique, we developed a new PGD test for FXS, enabling combined analysis of linked polymorphic markers...
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pub_type: 杂志文章,评审
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更新日期:1997-08-01 00:00:00
abstract::Villous tissues from 30 spontaneous abortions and the same number of artificial abortions were obtained and analysed for the frequency of polyploid cells. Single cell suspensions were made from these tissues without culture and the ploidy of > 100 cells was analysed. Trisomies of chromosomes 17 and 4 have rarely been ...
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pub_type: 杂志文章
doi:10.1093/molehr/3.5.445
更新日期:1997-05-01 00:00:00
abstract::Chemokines are implicated in the implantation process. The aim of this study was to investigate mRNA expression and protein levels of chemokine receptors CXCR1, CXCR4, CCR5 and CCR2B in human endometrium throughout the menstrual cycle, during HRT and in the human blastocyst. The regulation of chemokine receptors in th...
journal_title:Molecular human reproduction
pub_type: 杂志文章
doi:10.1093/molehr/gag024
更新日期:2003-04-01 00:00:00
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journal_title:Molecular human reproduction
pub_type: 杂志文章
doi:10.1093/molehr/gap102
更新日期:2010-03-01 00:00:00
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journal_title:Molecular human reproduction
pub_type: 杂志文章
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更新日期:2011-07-01 00:00:00
abstract::Natural killer (NK) cells are the predominant leukocyte in first trimester decidua and play a role in vascular remodelling through interferon gamma (IFNgamma) secretion. Membrane expression of the killer immunoglobulin-like receptor (KIR) KIR2DL4 on peripheral blood NK (pNK) cells is controlled by the 9A/10A transmemb...
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pub_type: 杂志文章
doi:10.1093/molehr/gap039
更新日期:2009-08-01 00:00:00
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journal_title:Molecular human reproduction
pub_type: 杂志文章
doi:10.1093/molehr/gal088
更新日期:2006-12-01 00:00:00
abstract::Mitotic centromere-associated kinesin (MCAK) is an ATP-dependent microtubule (MT) depolymerase regulated by Aurora kinase (AURK) phosphorylation and implicated in resolution of improper MT attachments in mitosis. Distribution of MCAK was studied in oocyte maturation by anti-MCAK antibody, anti-tubulin antibody, anti-A...
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pub_type: 杂志文章
doi:10.1093/molehr/gaq025
更新日期:2010-09-01 00:00:00
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更新日期:2020-04-24 00:00:00
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更新日期:2014-05-01 00:00:00
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pub_type: 杂志文章
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更新日期:1996-12-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2013-09-01 00:00:00
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journal_title:Molecular human reproduction
pub_type: 杂志文章
doi:10.1093/molehr/gam087
更新日期:2008-02-01 00:00:00
abstract::Before the advent of intracytoplasmic sperm injection (ICSI) semen preparation techniques focused on the need to sustain the fertilizing potential of the spermatozoa particularly by reducing oxidative stress. However, for severely oligozoospermic patients treated by ICSI, sperm preparation protocols are used which aim...
journal_title:Molecular human reproduction
pub_type: 杂志文章
doi:10.1093/molehr/4.5.439
更新日期:1998-05-01 00:00:00
abstract::Oxidative stress is a major aetiology in many pathologies, including that of male infertility. Recent evidence in somatic cells has linked oxidative stress to the induction of a novel cell death modality termed ferroptosis. However, the induction of this iron-regulated, caspase-independent cell death pathway has never...
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pub_type: 杂志文章
doi:10.1093/molehr/gaz015
更新日期:2019-05-01 00:00:00
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journal_title:Molecular human reproduction
pub_type: 杂志文章
doi:10.1093/molehr/6.11.1055
更新日期:2000-11-01 00:00:00
abstract:STUDY HYPOTHESIS:In women with preterm premature rupture of the membranes (PPROM), increased oxidative stress may accelerate premature cellular senescence, senescence-associated inflammation and proteolysis, which may predispose them to rupture. STUDY FINDING:We demonstrate mechanistic differences between preterm birt...
journal_title:Molecular human reproduction
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更新日期:2016-02-01 00:00:00
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journal_title:Molecular human reproduction
pub_type: 杂志文章
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更新日期:2012-10-01 00:00:00
abstract::We purified by fractionation on 10-40% glycerol gradients, 26S proteasomes from normal human spermatozoa. These proteasomes, which participate in the ATP-dependent degradation of ubiquitinated proteins, share a similar sedimentation coefficient to those purified from other human tissues. Fluorogenic peptide assays rev...
journal_title:Molecular human reproduction
pub_type: 杂志文章
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更新日期:1997-12-01 00:00:00