Abstract:
BACKGROUND:Estradiol (E2) and progesterone (P) are well known regulators of progesterone receptor (PR) expression in the rat uterus. However, it is not known which receptor subtypes are involved. Little knowledge exist about possible differences in PR regulation through ERalpha or ERbeta, and whether the PR subtypes are differently regulated depending on ER type bound. Thus, in the present study PR immunostaining has been examined in uteri of ovariectomized (ovx) rats after different treatments of estrogen and P, in comparison with that in immature, cycling, and pregnant animals. METHODS:The uteri were collected from 1) ovx rats treated with E2 and/or P; 2) immature rats, intact cycling rats and animals pregnant day 8 and 18; 3) ovx rats treated with E2 or an estrogen receptor (ER)alpha agonist or an ERbeta agonist. Two antibodies were used, one detecting PRA+B and another one specific for PRB. Real-time PCR was used to determine mRNA levels for PRAB and PRB in experiment 3. RESULTS:In stroma and myometrium faint staining was detected in ovx controls (OvxC), whereas E2 treatment resulted in strong staining. In contrast to this, in luminal epithelium (LE) the staining was strong in the OvxC group, whereas E2 treatment during the last 24 hrs before sacrifice caused a decrease. Similar to OvxC the LE of the immature animals was strongly stained. In the pregnant rats LE was negative, well in agreement with the results seen after E2 treatment. In the pregnant animals the stroma and decidua was strongly stained for PRAB, but only faint for PRB, indicating that PRA is the most expressed isoform in this state. The increase in stromal and myometrial immunostaining after E2 treatment was also found after treatment with the ERalpha agonist PPT. The ERbeta agonist DPN caused a decrease of the PR mRNA levels, which was also found for PRAB and PRB immunostaining in the GE. CONCLUSION:Stromal and myometrial PRAB levels are increased via ERalpha, as shown by treatment with E2 and the ERalpha agonist PPT, while the levels in LE are decreased. The uterine stroma of pregnant rats strongly expressed PRAB, but very little PRB, which is different to E2 treated ovx animals where both PRAB and PRB are strongly expressed. The ERbeta agonist DPN decreased the mRNA levels of PRAB and PRB, as well as the PRAB protein level in GE. These results suggest that ERbeta signals mainly down-regulate PR levels in the epithelial cells. ERalpha, on the other hand, up-regulates PR levels in the stroma and myometrium while it decreased them in LE. Thus, the effects from E2 and PPT on the mRNA levels, as determined by PCR, could be annihilated since they are increased and decreased depending on cell type. The distribution and amount of PR isoforms strongly depend on the hormonal milieu and cell type within the rat uterus.
journal_name
Reprod Biol Endocrinoljournal_title
Reproductive biology and endocrinology : RB&Eauthors
Sahlin L,Masironi B,Akerberg S,Eriksson Hdoi
10.1186/1477-7827-4-47subject
Has Abstractpub_date
2006-09-11 00:00:00pages
47issn
1477-7827pii
1477-7827-4-47journal_volume
4pub_type
杂志文章abstract:BACKGROUND:In early pregnancy, increased plasma levels of the endocannabinoid anandamide (AEA) are associated with miscarriage through mechanisms that might affect the developing placenta or maternal decidua. METHODS:In this study, we compare AEA levels in failed and viable pregnancies with the levels of the trophobla...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-9-152
更新日期:2011-11-29 00:00:00
abstract:BACKGROUND:Di(2-ethylhexyl) phthalate (DEHP) exposure reduces embryo implantations, increases embryonic loss, and decreases fetal body weights. However, whether it is associated with the alteration of luteal function remains unknown. Thus, our aim in this study was to explore the effect and mechanism of DEHP on luteal ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-015-0013-4
更新日期:2015-03-03 00:00:00
abstract:BACKGROUND:Flow cytometric sorting can be used to separate sperm based on sex chromosome content. Differential fluorescence emitted by stained X- vs. Y-chromosome-bearing sperm enables sorting and collection of samples enriched in either X- or Y-bearing sperm for use to influence the likelihood that the offspring will ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 临床试验,杂志文章
doi:10.1186/1477-7827-12-106
更新日期:2014-11-24 00:00:00
abstract:BACKGROUND:Sperm of poor quality can negatively affect embryo development to the blastocyst stage. The aim of this comparative prospective randomized study was to evaluate the role of an intracytoplasmic morphologically selected sperm injection (IMSI) in the same infertile couples included in the programme of intracyto...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,随机对照试验
doi:10.1186/1477-7827-9-123
更新日期:2011-08-29 00:00:00
abstract:BACKGROUND:The full maturational capability of mammalian oocytes is accompanied by nuclear and cytoplasmic modifications, which are associated with proliferation and differentiation of surrounding cumulus cells. These events are regulated on molecular level by the expression of target genes involved in signal transduct...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-017-0261-6
更新日期:2017-06-02 00:00:00
abstract:BACKGROUND:To evaluate the relationship between endometrial thickness on day of human chorionic gonadotrophin administration (hCG) and pregnancy outcome in a large number of consecutive in vitro fertilization and embryo transfer (IVF-ET) cycles. METHODS:A retrospective cohort study including all patients who had IVF-E...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-6-37
更新日期:2008-09-02 00:00:00
abstract:BACKGROUND:Bovine luteal parenchymal cells express class II major histocompatibility complex (MHC) molecules and stimulate class II MHC-dependent activation of T cells in vitro. The ability of a class II MHC-expressing cell type to elicit a response from T cells in vivo is also dependent on expression of costimulatory ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-5-5
更新日期:2007-01-31 00:00:00
abstract:BACKGROUND:Polycystic ovary syndrome (PCOS) is a complex endocrine and metabolic disorder associated with ovulatory dysfunction, abdominal obesity, hyperandrogenism, hypertension, and insulin resistance. METHODS:Our objectives in this study were (1) to estimate sympathetic-adrenal medullary (SAM) activity by measuring...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-3-44
更新日期:2005-09-07 00:00:00
abstract:BACKGROUND:The published results regarding lymphocytes immunotherapy for unexplained recurrent miscarriage (uRM) patients are conflicting due to different screening criteria and therapeutic protocols. The objective of the present study is to evaluate the effectiveness of immunotherapy using low-dose lymphocytes in pati...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-017-0315-9
更新日期:2017-12-16 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::For the extrapolation of data obtained from experimental animals to the human situation, it is important to know the similarities and differences between human and animal species. Some important characteristics of nitric oxide synthase (NOS) in myometrium and vagina from human and rat were compared. NOS-activity was m...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-1-10
更新日期:2003-02-06 00:00:00
abstract:BACKGROUND:Adequate maternal nutrition during gestation is requisite for fetal nutrition and development. While a large group of epidemiological studies indicate poor fetal nutrition increases heart disease risk and mortality in later life, little work has focused on the effects of impaired maternal nutrition on fetal ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-3-27
更新日期:2005-07-14 00:00:00
abstract:BACKGROUND:Patients hoping to preserve their fertility receive conservative treatment with high-dose medroxyprogesterone acetate (MPA) for well-differentiated endometrioid adenocarcinoma (EC) or atypical endometrial hyperplasia (AEH) . Such treatment generally involves frequent intrauterine operations, including dilati...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-015-0136-7
更新日期:2016-01-15 00:00:00
abstract:BACKGROUND:Spermatozoa are extremely vulnerable to oxidative stress caused by the unbalance between concentrations of reactive oxygen species and antioxidant scavenging systems present inside the male reproductive tract. In spite of a large number of clinical studies that claimed the beneficial effects of antioxidant o...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-11-81
更新日期:2013-08-16 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:Prostaglandins are important for female reproduction. Prostaglandin-E2 acts via four different receptor subtypes, EP1, EP2, EP3 and EP4 whereas prostaglandin-F2alpha acts through FP. The functions of prostaglandins depend on the expression of their receptors in different uterine cell types. Our aim was to in...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-10-3
更新日期:2012-01-18 00:00:00
abstract:BACKGROUND:Gonadal differentiation in the mammalian fetus involves a complex dose-dependent genetic network. Initiation and progression of fetal ovarian and testicular pathways are accompanied by dynamic expression patterns of thousands of genes. We postulate these expression patterns are regulated by small non-coding ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-9-2
更新日期:2011-01-11 00:00:00
abstract:BACKGROUND:TGF-beta is a multifunctional growth factor involved in regulating a variety of cellular activities. Unlike mammals, the function of TGF-beta in the reproduction of lower vertebrates, such as fish, is not clear. Recently, we showed that TGF-beta1 inhibits gonadotropin- and 17alpha, 20beta-dihydroxyprogestero...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-3-53
更新日期:2005-09-30 00:00:00
abstract:BACKGROUND:Adrenomedullin (ADM), a novel vasorelaxant peptide, was found in human/rat ovaries. The present study investigated the interaction of ADM and endothelin-1 (ET-1) in follicles and newly formed corpora lutea (CL) and the actions of ADM on progesterone production in CL during pregnancy. METHODS:The peptide and...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-9-111
更新日期:2011-08-09 00:00:00
abstract:BACKGROUND:Implantation of the embryo and successful pregnancy are dependent on the differentiation of endometrial stromal cells into decidual cells. Female interleukin-11 receptor alpha (IL-11Ralpha) deficient mice are infertile due to disrupted decidualization, suggesting a critical role for IL-11 and its target gene...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-2-76
更新日期:2004-11-10 00:00:00
abstract:BACKGROUND:Several medical conditions can affect and disrupt human sexuality. The alteration of sexuality in these medical conditions often hinder effective communication and empathy between the patients and their sexual partners because of cultural attitudes, social norms and negative feelings such as anxiety and guil...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-8-118
更新日期:2010-10-13 00:00:00
abstract:BACKGROUND:Human uterine leiomyoma (fibroids; LYO) are the most common benign neoplasms in reproductive-aged women. Dysregulated extracellular matrix and irregular LYO reversion-inducing cysteine-rich protein with Kazal motifs (RECK) expression are thought to be mediated by aberrant microRNA (miR) expression. The relat...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-016-0180-y
更新日期:2016-08-17 00:00:00
abstract:BACKGROUND:Previous studies have demonstrated that progestin-primed ovarian stimulation (PPOS) protocol was a feasible and efficient method in in vitro fertilization (IVF) cycle. However, its application in women with advanced age has not been determined yet. The purpose of this study was to investigate its efficacy in...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-019-0518-3
更新日期:2019-11-09 00:00:00
abstract::Chemokines are small molecular weight peptides responsible for adhesion, activation, and recruitment of leukocytes into tissues. Leukocytes are thought to influence follicular atresia, ovulation, and luteal function. Many studies in recent years have focused attention on the characterization of leukocyte populations w...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/1477-7827-1-94
更新日期:2003-11-10 00:00:00
abstract:BACKGROUND:Embryo selection has been an integral feature of in vitro fertilization (IVF) almost since its inception. Since the advent of extended blastocyst stage embryo culture, and especially with increasing popularity of elective single embryo transfer (eSET), the concept of embryo selection has increasingly become ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-13-3
更新日期:2015-01-11 00:00:00
abstract:BACKGROUND:The transformation of endometrium into decidua is essential for normal implantation of the blastocyst. However, the post-transcriptional regulation and the miRNAs involved in decidualization remain poorly understood. Here, we examined microRNA-181a (miR-181a) expression in decidualized human endometrial stro...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-015-0019-y
更新日期:2015-03-26 00:00:00
abstract::Cloning by nuclear transfer using mammalian somatic cells has enormous potential application. However, somatic cloning has been inefficient in all species in which live clones have been produced. High abortion and fetal mortality rates are commonly observed. These developmental defects have been attributed to incomple...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/1477-7827-1-98
更新日期:2003-11-13 00:00:00
abstract:BACKGROUND:The in vitro maturation (IVM) technique has physical and financial benefits, but a lower efficiency and outcome that is still unclear whether it is related to polycystic ovary syndrome (PCOS) itself or the IVM procedure. In this study, we analyzed the clinical and laboratory outcomes of an optimized IVM prot...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-020-00622-y
更新日期:2020-07-15 00:00:00
abstract:BACKGROUND:Limitations in our current knowledge of normative physiologic changes in thyroid function during the periconception window narrow our ability to establish an optimal approach to screening and diagnosis of thyroid disease in pregnant women. The objective of this study was to characterize changes in thyroid fu...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-10-20
更新日期:2012-03-21 00:00:00
abstract:BACKGROUND:Gestational diabetes mellitus (GDM) is a common complication in pregnancy that poses a serious threat to the health of both mother and child. While the specific etiology and pathogenesis of this disease are not fully understood, it is thought to arise due to a combination of insulin resistance, inflammation,...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-020-00612-0
更新日期:2020-05-20 00:00:00