Abstract:
BACKGROUND:Metformin decreases polycystic ovary syndrome (PCOS) symptoms, induces ovulation, and may improve developmental competence of in vitro oocyte maturation. This study was designed to define the effects of metformin on the characteristics of in vitro oocyte maturation in estradiol valerate (EV) PCOS-induced rats. METHODS:Forty-five adult female Sprague-Dawley rats were randomly divided into control; sham and PCOS-induced (treated by a single dose of estradiol valerate, 4 mg/rat, IM) groups. The body weight was measured weekly for 12 weeks. At the end of week 12, the serum levels of testosterone, estrogen, progesterone, LH, and FSH and blood glucose of all the rats were measured. About 380 cumulus oocyte complexes (control, 125; sham, 122; PCOS-induced rats, 133) were incubated in Ham's F10 in the absence and/or presence of metformin (M 5(-10)) for 12, 24, 36, and 48 h. The cumulus cells expansion and nuclear and cytoplasmic maturation of the oocytes was evaluated using 1 % aceto-orcein staining, and transmission electron microscopy (TEM). RESULTS:No significant differences were observed in the body weight of the rats. The serum level of testosterone was reduced, and progesterone and LH were significantly increased in the PCOS-induced rats (p < 0.05). However, no significant differences were observed in the serum levels of estrogen and FSH among the groups. Blood glucose level was higher in the PCOS-induced rats than control, (p < 0.01). The expansion of cumulus cells was observed in the metformin-treated oocytes. The oocytes retrieved from PCOS-induced rats show a stage of meiotic division (GVBD, MI, A-T, and MII) in 57.12 % of metformin-untreated and fairly significantly increased to 64.28 % in metformin-treated oocytes, (p < 0.05), but no differences were observed in the MII stage within groups. The redistribution of some cytoplasmic organelles throughout the ooplasm, particularly the peripheral cortical granules, was defined in the metformin-treated oocytes. CONCLUSIONS:Single dose of EV can creates a reversible PCO adult rat model. Metformin enhances the COCs to initiate meiotic resumption at the first 6 h of IVM. In our study the metformin inability to show all aspects of in vitro oocyte maturation and may be resulted from deficiency of EV to induce PCOS.
journal_name
J Ovarian Resjournal_title
Journal of ovarian researchauthors
Mesbah F,Moslem M,Vojdani Z,Mirkhani Hdoi
10.1186/s13048-015-0203-xsubject
Has Abstractpub_date
2015-11-14 00:00:00pages
74issn
1757-2215pii
10.1186/s13048-015-0203-xjournal_volume
8pub_type
杂志文章abstract:OBJECTIVE:To review utilisation of elective embryo cryopreservation in the expectant management of patients at risk for developing ovarian hyperstimulation syndrome (OHSS), and report on reproductive outcome following transfer of thawed embryos. MATERIALS AND METHODS:Medical records were reviewed for patients undergoi...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/1757-2215-1-7
更新日期:2008-11-06 00:00:00
abstract:BACKGROUND:Ovarian thecoma-fibroma groups (OTFG) are uncommon sex cord-stromal neoplasms. The objective of the study was to demonstrate clinical and sonographic features of OTFG and compare with surgical histopathology. METHODS:A total of 61 patients with surgically proven OTFG were enrolled in this retrospective stud...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-016-0291-2
更新日期:2016-11-22 00:00:00
abstract:BACKGROUND:Wnt-inducible signaling pathway protein 2 (WISP2) is a wnt1-induced signaling pathway protein 2. Although studies indicate that WISP2 may promote the development of various tumors, its role in ovarian cancer remains unclear. The objective of the current study was to analyze the effects of WISP2 on the prolif...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-020-00687-8
更新日期:2020-07-25 00:00:00
abstract::AbstractThe original article [1] contains errors in Figs. 6 and 8. The corrected figures can be shown ahead. ...
journal_title:Journal of ovarian research
pub_type: 杂志文章,已发布勘误
doi:10.1186/s13048-019-0487-3
更新日期:2019-01-30 00:00:00
abstract:BACKGROUND:Survivin is an inhibitor of apoptosis and a regulator of mitotic progression. TP53 protein is a negative transcriptional regulator of survivin. The aim of our study was to evaluate the clinical significance of survivin expression in advanced stages ovarian cancer with respect to the TP53 status. METHODS:Sur...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/1757-2215-4-20
更新日期:2011-11-10 00:00:00
abstract::RNA methylation can reverse the methylation modification at the RNA level, which is an extremely important epigenetic modification. The function and mechanism of YTHDF2, as a reader of m6A modification, in epithelial ovarian cancer (EOC) have not been elucidated so far. This study aimed to investigate how YTHDF2 and m...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-020-00717-5
更新日期:2020-09-18 00:00:00
abstract:OBJECTIVES:The ovarian tumor marker CA125 is expressed on human MUC16, a cell surface bound mucin that is also shed by proteolytic cleavage. Human MUC16 is overexpressed by ovarian cancer cells. MUC16 facilitates the binding of ovarian tumor cells to mesothelial cells lining the peritoneal cavity. Additionally, MUC16 a...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/1757-2215-2-8
更新日期:2009-06-18 00:00:00
abstract:BACKGROUND:The aim of this study was to evaluate the concentrations of IgG antibodies against Hsp60 and Hsp65 in sera of patients with ovarian cancer at various stages of clinical progress and for different histopathological types of disease. METHODS:Serum samples from 149 patients with ovarian carcinoma and 80 health...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/1757-2215-7-30
更新日期:2014-03-11 00:00:00
abstract:BACKGROUNDS:Long non-coding RNA is a novel group of non-protein coding transcripts over 200 nt in length. Recent studies have found that they are widely involved in many pathological and physiological processes. In our previous study, we found that lnc-GULP1-2:1 was significantly down-regulated in the ovarian cortical ...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-021-00769-1
更新日期:2021-01-20 00:00:00
abstract:BACKGROUND:The ST6Gal-I glycosyltransferase, which adds α2-6-linked sialic acids to N-glycosylated proteins is upregulated in a wide range of malignancies including ovarian cancer. Prior studies have shown that ST6Gal-I-mediated sialylation of select surface receptors remodels intracellular signaling to impart cancer s...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-019-0574-5
更新日期:2019-10-14 00:00:00
abstract:BACKGROUND:galectin-1 has been implicated in tumor invasion and metastasis and is frequently over-expressed in epithelial ovarian cancer (EOC), but its potential as a biomarker remains unclear. In this novel study, we have explored the possible use of galectin-1 as a biomarker for EOC. METHODS:galectin-1 in sera was e...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-015-0206-7
更新日期:2015-11-21 00:00:00
abstract:BACKGROUND:Ovarian hyperstimulation syndrome remains a serious complication during in vitro fertilization cycles if high dose human chorionic gonadotropin (hCG) is used to trigger ovulation in high responder patients. Though much of this risk is mitigated with trigger using gonadotropin releasing-hormone (GnRH) agonist...
journal_title:Journal of ovarian research
pub_type: 杂志文章,随机对照试验
doi:10.1186/s13048-019-0483-7
更新日期:2019-01-26 00:00:00
abstract:BACKGROUND:Neovascularization is necessary for follicular growth. Vascularization is first observed in preantral follicles, and thereafter the vasculature markedly increases in follicles undergoing development. Neovascularization includes angiogenesis and vasculogenesis. Vasculogenesis is the formation of new blood ves...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/1757-2215-7-10
更新日期:2014-01-21 00:00:00
abstract:BACKGROUND:Glutathione peroxidase 3 (GPX3) is a selenocysteine-containing antioxidant enzyme that reacts with hydrogen peroxide and soluble fatty acid hydroperoxides, thereby helping to maintain redox balance within cells. Serum levels of GPX3 have been found to be reduced in various cancers including prostrate, thyroi...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/1757-2215-4-18
更新日期:2011-10-22 00:00:00
abstract:BACKGROUND:Upregulation of Cyclin dependent kinase 1 (CDK1) protein is closely related with the prognosis of several malignant tumors. Chk1-CDC25C-CDK1 signaling and P53-P21WAF1-CDK1 signaling pathways are closely related with the cell cycle G2/M phase regulation. The present study aimed to analyze the relationship bet...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-017-0356-x
更新日期:2017-09-12 00:00:00
abstract:BACKGROUND:This study aimed to identify the clinical and pathological characteristics and the possible prognostic factors for Chinese patients with early-stage ovarian endometrioid carcinoma. METHODS:The present study reviewed the medical records of patients who received initial treatment and a postoperative pathologi...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-017-0361-0
更新日期:2017-09-18 00:00:00
abstract:PURPOSE:The conversion of androgens into estrogens by aromatase is called aromatization and is inhibited by aromatase inhibitors (AIs). The aim of this article is to evaluate the use of aromatase inhibitors in gynecological diseases such as endometriosis, leiomyoma, estrogen- dependent gynecologic neoplasia and inferti...
journal_title:Journal of ovarian research
pub_type: 杂志文章,评审
doi:10.1186/s13048-015-0131-9
更新日期:2015-02-25 00:00:00
abstract:BACKGROUND:The imbalance of expression of microRNA-802 may have a significant place in tumor progression. However, the bio-function of epithelial ovarian cancer cells remains unclear. Therefore, we setup this study to explore the pathogenesis of epithelial ovarian cancer based on microRNA-802. METHODS:RT-qPCR analysis...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-019-0576-3
更新日期:2019-10-22 00:00:00
abstract:BACKGROUND:In this study we aimed to identify a prognostic signature in BRCA1/2 mutations to predict disease progression and the efficiency of chemotherapy ovarian cancer (OV), the second most common cause of death from gynecologic cancer in women worldwide. METHODS:Univariate Cox proportional-hazards and multivariate...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-020-00712-w
更新日期:2020-09-19 00:00:00
abstract::Both estrogens and androgens are involved in the development and normal functioning of the ovaries. It is also known that ovarian function is regulated by diet. The goal of this study was to estimate the expression of sex hormone receptors in ovaries of mice that were on a 9-month caloric restriction (alternate-day fe...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-015-0185-8
更新日期:2015-08-13 00:00:00
abstract:BACKGROUND:Altered androgen hormone homeostasis and androgen receptor (AR) activity have been implicated in ovarian carcinogenesis but the relationship between AR expression in ovarian cancer and clinical outcome remains unclear. METHODS:In this study, the prognostic impact of AR expression was investigated using immu...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/1757-2215-3-14
更新日期:2010-06-17 00:00:00
abstract:BACKGROUND:Because higher survival of follicles during the freezing/thawing procedure improves the quality of cryopreserved tissue reimplanted after oncological therapies, defining an optimal method for human ovarian tissue cryopreservation remains a major issue in this field. One option to improve the cryopreservation...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-016-0268-1
更新日期:2016-09-26 00:00:00
abstract:BACKGROUND:Recent researches demonstrate that pre-treatment with androgen could increase retrieved oocytes number and clinical pregnancy rate in poor ovarian response (POR) patients. In view of gap junction intercellular communication (GJIC) is important for follicular growth, and androgen plays an important role in im...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-016-0290-3
更新日期:2016-11-23 00:00:00
abstract::The original article [1] contains errors in Fig. 3C, Results and Discussion. ...
journal_title:Journal of ovarian research
pub_type: 杂志文章,已发布勘误
doi:10.1186/s13048-020-00628-5
更新日期:2020-03-13 00:00:00
abstract::Ovarian hyperstimulation syndrome (OHSS) is a serious complication of controlled ovarian hyperstimulation (COH). The syndrome almost always presents either after hCG administration in susceptible patients or during early pregnancy. Despite many years of clinical experience, there are no precise methods to completely p...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/1757-2215-6-77
更新日期:2013-11-05 00:00:00
abstract:OBJECTIVES:Endometrioid carcinoma of the ovary is one of the most types of epithelial ovarian cancer associated to endometrioisis. Endometrioid tumors as well as endometriotic implants are characterized by the presence of epithelial cells, stromal cells, or a combination of booth, that resemble the endometrial cells, s...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/1757-2215-3-3
更新日期:2010-01-28 00:00:00
abstract:BACKGROUND:We aimed to examine the expression of miR-1307 in chemosensitive and chemoresistant epithelial ovarian cancer tissues and cell lines and to analyze the clinicopathological significance of miR-1307 in ovarian cancer. METHODS:MicroRNA microarray was used to screen differentially expressed microRNAs between th...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-015-0143-5
更新日期:2015-04-09 00:00:00
abstract:BACKGROUND:The polycystic ovary syndrome (PCOS) is a complex and heterogeneous endocrine condition characterized by hyperandrogenism, hyperinsulinemia, insulin resistance and chronic anovulation. Regulation and interaction of a multitude of genes required for follicular development are found to be altered in PCOS. Micr...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/1757-2215-6-36
更新日期:2013-05-15 00:00:00
abstract:OBJECTIVE:To explore the risk factors for the recurrence of endometrioma and the risk factors for the recurrence of endometriosis-related pain after long-term follow-up. METHODS:This study retrospectively analyzed 358 women with endometriomas who had a minimum of 5-years follow up after laparoscopic endometrioma excis...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-019-0552-y
更新日期:2019-08-30 00:00:00
abstract:BACKGROUND:Resveratrol (3,5,4'-trihydroxy-trans-stilbene) is a natural antioxidant polyphenol able to exert a wide range of biological effect on several tissues. Despite its important beneficial properties, it has a low water solubility, which limits its therapeutic applications in humans. Resveratrol also acts as a ph...
journal_title:Journal of ovarian research
pub_type: 杂志文章
doi:10.1186/s13048-017-0357-9
更新日期:2017-09-15 00:00:00