Abstract:
BACKGROUND:The fibrinolytic system and its inhibitors play a number of roles, apart from their function in blood haemostasis and thrombosis, namely in ovarian folliculogenesis and in ovulation. Plasminogen is converted to active plasmin at the time of follicular rupture through a decrease in plasminogen activator inhibitor-1 (PAI-1) and an increase in plasminogen activators. Oligo-/anovulation and follicle arrest are key characteristics of PCOS, but studies evaluating fibrinolytic/proteolytic markers within human or animal PCOS ovaries are lacking. We aimed to investigate and compare the expression and distribution of the plasminogen system markers in PCOS and control ovaries. METHODS:A hyperandrogenised PCOS mouse model was used that mimics the ovarian, endocrine and metabolic features of the human condition. Immunohistochemistry and digital image analysis were used to investigate and compare fibrinolytic/proteolytic markers plasminogen, plasminogen/plasmin, tissue plasminogen activator, urokinase plasminogen activator and inhibitor PAI-1 in PCOS and control ovaries. Student's t-test was used to compare data sets for normally distributed data and Wilcoxon-Mann Whitney test for non-normally distributed data. RESULTS:We noted differences in the ovarian distribution of PAI-1 that was expressed throughout the PCOS ovary, unlike the peripheral distribution observed in control ovaries. Plasminogen was present in small follicles only in PCOS ovaries but not in small follicles of control ovaries. When we assessed and compared PAI-1 expression within follicles of different developmental stages we also noted significant differences for both the PCOS and control ovaries. While we noted differences in distribution and expression within specific ovarian structures, no differences were noted in the overall ovarian expression of markers assessed between acyclical PCOS mice and control mice at the diestrus stage of the estrous cycle. CONCLUSIONS:Our novel study, that comprehensively assessed the fibrinolytic/proteolytic system in the mouse ovary, showed the expression, differential localisation and a potential role for the plasminogen system in the physiological mouse ovary and in PCOS. Androgens may be involved in regulating expression of the ovarian plasminogen system. Further studies evaluating these markers at different time-points of ovulation may help to further clarify both physiological and potential pathological actions these markers play in ovulatory processes distorted in PCOS.
journal_name
Reprod Biol Endocrinoljournal_title
Reproductive biology and endocrinology : RB&Eauthors
Burchall GF,Pouniotis DS,Teede HJ,Ranasinha S,Walters KA,Piva TJdoi
10.1186/s12958-019-0472-0subject
Has Abstractpub_date
2019-03-16 00:00:00pages
33issue
1issn
1477-7827pii
10.1186/s12958-019-0472-0journal_volume
17pub_type
杂志文章abstract:BACKGROUND:Mares have an annual reproductive rhythm, with a phase of inactivity in midwinter. The aim of this study was to determine the impact of food restriction on physiological and metabolic hallmarks of this rhythm. METHODS:Over three successive years, 3 groups of 10 mares were kept under natural photoperiod. A '...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,随机对照试验
doi:10.1186/1477-7827-9-130
更新日期:2011-09-29 00:00:00
abstract:BACKGROUND:Endocannabinoids (ECs) are important contributors to implantation and decidualization and are suppressed in early pregnancy. Elevated levels of anandamide (AEA), the endogenous ligand for the CB1 and CB2 receptors (R), interfere with receptivity of the blastocyst. Ang-(1-7) is down-regulated in the implantat...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-13-5
更新日期:2015-01-17 00:00:00
abstract:BACKGROUND:To study the expression of Plexin-B1, Glycodelin, and MMP7 during the menstrual cycle in the endometrium and in the fallopian tube. METHODS:The research included women undergoing hysterectomy, tubal sterilization or salpingo-oophoerectomy. Total RNA from endometrial and fallopian tube tissues was extracted ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-7-152
更新日期:2009-12-29 00:00:00
abstract:BACKGROUND:Progesterone plays an important role in the proliferation and differentiation of human endometrial cells (hECs). Large-dose treatment with progesterone has been used for treatment of endometrial proliferative disorders. However, the mechanisms behind remain unknown. METHODS:To investigate the role of cyclin...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-7-144
更新日期:2009-12-07 00:00:00
abstract:BACKGROUND:Endometriosis is a known cause of infertility. Differences in immune tolerance caused by regulatory T cells (Tregs) and transforming growth factor-β (TGF-β) are thought to be involved in the pathology of endometriosis. Evidence has indicated that Tregs can be separated into three functionally and phenotypica...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-018-0325-2
更新日期:2018-02-01 00:00:00
abstract:BACKGROUND:To evaluate the association between leukocytes (polymorphonuclear granulocytes -PMNL) and semen parameters at different leukocyte concentrations. METHODS:This was a retrospective clinical study at a university hospital andrology clinic. Semen samples from infertile men were analyzed for sperm morphology and...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-8-12
更新日期:2010-02-05 00:00:00
abstract:BACKGROUND:Several kinds of anti-oxidants have drawn a lot of intention for their benefits on vascular protection. In addition, it has been demonstrated that exercise training could improve endothelial function by up-regulating endothelial nitric oxide synthase (eNOS) protein. Therefore, the present study aims to inves...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-7-93
更新日期:2009-09-07 00:00:00
abstract:BACKGROUND:The objective was to determine the effect of prepartum diets supplemented with rolled canola seed (high in oleic acid) or sunflower seed (high in linoleic acid) on luteinizing hormone (LH) pulsatility and gonadotropin releasing hormone (GnRH)-induced LH release during early postpartum. METHODS:Thirty-one pr...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-015-0060-x
更新日期:2015-07-03 00:00:00
abstract:BACKGROUND:Intracytoplasmic morphologically selected sperm injection (IMSI) is still proposed and employed in the clinical practice to improve the reproductive outcome in infertile couples scheduled for conventional intracytoplasmic sperm injection (cICSI). The aim of the current randomized controlled trial (RCT) was t...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,随机对照试验,收录出版
doi:10.1186/s12958-015-0096-y
更新日期:2015-08-27 00:00:00
abstract::Preimplantation embryo development involves four stages: fertilization, cell cleavage, morula and blastocyst formation. During these stages, maternal and zygotic epigenetic factors play crucial roles. The gene expression profile is changed dramatically, chromatin is modified and core histone elements undergo significa...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/1477-7827-7-59
更新日期:2009-06-05 00:00:00
abstract:BACKGROUND:In natural cycles, women conceive when intercourse takes place during a six-day period ending on the day of ovulation. The current practice in intrauterine insemination (IUI) cycles is to perform the IUI 24-36 hours after the hCG administration, when the ovulation is already imminent. In this study hCG was a...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-8-18
更新日期:2010-02-23 00:00:00
abstract:BACKGROUND:In-situ hybridisation studies demonstrate that Notch receptors and ligands are expressed in granulosa cells (GCs) and in the theca layer vasculature of growing follicles. Notch signaling involves cell-to-cell interaction mediated by transmembrane receptors and ligands. This signaling pathway may represent a ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-11-43
更新日期:2013-05-15 00:00:00
abstract:BACKGROUND:Endocrine mechanisms governing canine reproductive function remain still obscure. Progesterone (P4) of luteal origin is required for maintenance of pregnancy. Corpora lutea (CL) are gonadotrop-independent during the first third of dioestrus; afterwards prolactin (PRL) is the primary luteotropic factor. Inter...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-9-109
更新日期:2011-08-03 00:00:00
abstract:BACKGROUND:Pregnancy-associated plasma protein-A2 (PAPP-A2) is consistently upregulated in the placentae of pregnancies complicated by preeclampsia and fetal growth restriction. The causes and significance of this upregulation remain unknown, but it has been hypothesized that it is a compensatory response to improve pl...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-018-0376-4
更新日期:2018-06-12 00:00:00
abstract:BACKGROUND:Serum leptin levels are augmented in obese infertile men and in men with azoospermia. They also correlate inversely with sperm concentration, motility and normal forms. The mechanisms underlying the adverse effects of excess leptin on male reproductive function remain unclear. The present study aimed to eval...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-018-0368-4
更新日期:2018-05-31 00:00:00
abstract:BACKGROUND:Dehydroepinadrosterone (DHEA) supplementation improves pregnancy chances in women with diminished ovarian reserve (DOR), by possibly reducing aneuploidy. Since a large majority of spontaneous miscarriages are associated with aneuploidy, one can speculate that DHEA supplementation may also reduce miscarriage ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-7-108
更新日期:2009-10-07 00:00:00
abstract:BACKGROUND:To examine the effects of IVF, ICSI and FET, as well as in vitro culture, on the safety of offspring, this study was conducted from the perspective of genetic imprinting to investigate whether assisted reproductive technology would influence the parental and maternal imprinting genes. METHODS:Eighteen foetu...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-018-0344-z
更新日期:2018-07-05 00:00:00
abstract:BACKGROUND:Previous caesarean scar pregnancy is one type of ectopic pregnancy in myometrium and fibrous tissue of previous caesarean scar. One of the therapeutic methods of this type of ectopic pregnancy is treatment with methotrexate. Given various findings on the treatment of caesarean scar pregnancy with methotrexat...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-020-00666-0
更新日期:2020-11-09 00:00:00
abstract::Cloning mammals by nuclear transfer is a powerful technique that is quickly advancing the development of genetically defined animal models. However, the overall efficiency of nuclear transfer is still very low and several hurdles remain before the power of this technique will be fully harnessed. Among these hurdles in...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/1477-7827-1-84
更新日期:2003-11-07 00:00:00
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journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-7-49
更新日期:2009-05-21 00:00:00
abstract:BACKGROUND:Premutation range CGGn repeats of the FMR1 gene denote risk toward primary ovarian insufficiency (POI), also called premature ovarian failure (POF). This prospective cohort study was undertaken to determine if X-chromosome inactivation skew (sXCI) is associated with variations in FMR1 CGG repeat length and, ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-017-0250-9
更新日期:2017-04-28 00:00:00
abstract:BACKGROUND:Nucleotide-binding oligomerization domain (NACHT), leucine rich repeat (LRR) and pyrin domain (PYD) 7 containing protein, NLRP7, is a member of the NLR family which serves as innate immune sensors. Mutations and genetic variants of NLRP7 have been found in women with infertility associated conditions, such a...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-017-0286-x
更新日期:2017-08-15 00:00:00
abstract:BACKGROUND:hCG is a wonder. Firstly, because hCG is such an extreme molecule. hCG is the most acidic glycoprotein containing the highest proportion of sugars. Secondly, hCG exists in 5 common forms. Finally, it has so many functions ranging from control of human pregnancy to human cancer. This review examines these mol...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/1477-7827-10-24
更新日期:2012-03-28 00:00:00
abstract:BACKGROUND:In several species, considerably higher levels of estradiol-17 (E2) are synthesized in the CL. E2 has been suggested to participate in the regulation of luteal steroidogenesis and luteal cell morphology. In pregnant rats, several experiments have been carried out to examine the effects of inhibition of lutea...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-016-0153-1
更新日期:2016-04-12 00:00:00
abstract::Although Calbindin-D9k (CaBP-9k), a cytosolic calcium binding protein which has calcium binding sites, is expressed in various tissues, i.e., intestine, uterus, and placenta, potential roles of this gene and its protein are not clearly understood. Uterine CaBP-9k may be involved in controlling myometrial activity rela...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/1477-7827-3-66
更新日期:2005-11-16 00:00:00
abstract:BACKGROUND:In Spanish public hospital Reproduction Units it is very problematic to perform programmed intrauterine insemination (IUI) on weekends, if indicated. Small previous pilot studies suggest that using a GnRH antagonist to avoid an LH weekend surge would allow to perform IUI on the following Monday, not impairin...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-016-0187-4
更新日期:2016-09-02 00:00:00
abstract:BACKGROUND:Wolfram Syndrome (WS) is an autosomal recessive disorder characterised by non-autoimmune diabetes mellitus, optic atrophy, cranial diabetes insipidus and sensorineural deafness. Some reports have described hypogonadism in male WS patients. The aim of our study was to find out whether Wfs1 deficient (Wfs1KO) ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-7-82
更新日期:2009-08-10 00:00:00
abstract:BACKGROUND:This study was aimed at screening out the potential key genes and pathways associated with gestational diabetes mellitus (GDM). METHODS:The GSE70493 dataset used for this study was obtained from the Gene Expression Omnibus database. Differentially expressed genes (DEGs) in the placental tissue of women with...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-019-0546-z
更新日期:2019-11-29 00:00:00
abstract:BACKGROUND:Infertile men have higher levels of semen reactive oxygen species (ROS) than fertile men. High levels of semen ROS can cause sperm dysfunction, sperm DNA damage and reduced male reproductive potential. This study investigated the effects of supplementation with N-acetyl-cysteine (NAC) on the sperm quality, c...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,随机对照试验
doi:10.1186/s12958-019-0468-9
更新日期:2019-02-16 00:00:00
abstract:BACKGROUND:The injection of estradiol valerate in female rats induces polycystic ovary syndrome, which is characterized by polycystic ovaries, anovulation, and hyperandrogenism. These characteristics have been associated with an increase in the ovarian concentration of norepinephrine, which occurs before establishing t...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-018-0400-8
更新日期:2018-09-07 00:00:00