Abstract:
:The authors studied the effects of 4-hydroxyandrostene-3,17-dione (4-OHA) on progesterone (P), 17 beta-estradiol (E2), and 20 alpha-hydroxy-4-pregnen-3-one synthesis and pregnenolone accumulation in cultured human midluteal cells. A dose-dependent inhibition with and without human chorionic gonadotropin (hCG) of E2 and P production was observed. The accumulation of pregnenolone was significantly enhanced three to fourfold by 4-OHA in this culture system, as compared with control value. In addition, a sevenfold increase on pregnenolone accumulation was observed in the presence of 4-OHA plus 10 IU of hCG as compared with control values and 2.2-fold as compared with the 4-OHA treatments. These in vitro findings indicate a direct effect of 4-OHA on luteal steroidogenesis. Nevertheless, the suppressive effect of 4-OHA on P and E2 production is located at different sites of the steroidogenic pathway. In addition, the results demonstrate that hCG in the presence of 4-OHA stimulated pregnenolone accumulation, suggesting that the inhibition of P synthesis is in some steps after the formation of pregnenolone. These data indicate that the actions of 4-OHA on P or E2 formation have different inhibitory mechanisms.
journal_name
Fertil Steriljournal_title
Fertility and sterilityauthors
Devoto L,Vega M,Castro O,Kohen Pdoi
10.1016/s0015-0282(16)54300-3subject
Has Abstractpub_date
1991-05-01 00:00:00pages
922-6issue
5eissn
0015-0282issn
1556-5653pii
S0015-0282(16)54300-3journal_volume
55pub_type
杂志文章abstract::DNA methylation at H19 ICR1 was investigated in the placenta from pregnancies conceived by in vitro fertilization, intracytoplasmic sperm injection, and from natural conception. Our results showed that there were no significant differences in mean methylation between all pregnancy groups; therefore, assisted reproduct...
journal_title:Fertility and sterility
pub_type: 杂志文章,多中心研究
doi:10.1016/j.fertnstert.2011.05.047
更新日期:2011-06-30 00:00:00
abstract::The authors review the current approach to management of the adolescent varicocele which has evolved over the past two decades. Principles of observational, surgical and adjunctive management are discussed relative to significant clinical findings. A selective approach to surgical intervention is advocated with the go...
journal_title:Fertility and sterility
pub_type: 杂志文章,评审
doi:10.1016/j.fertnstert.2011.10.034
更新日期:2011-12-01 00:00:00
abstract::Solid-phase enzyme immunoassays, based on monoclonal antibodies reactive with different forms of human placental-type alkaline phosphatases, were applied to their detection in human seminal plasma from fertile and infertile men. The placental-like form of alkaline phosphatase (PLAP-like AP), known to occur in testicul...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:
更新日期:1986-11-01 00:00:00
abstract::Disorders of development, fusion, or resorption of paired müllerian ducts and urogenital sinus may cause various congenital malformations of the corpus uteri, cervix, vagina, and fallopian tubes. Classification systems have been developed to better characterize these anomalies, and each has advantages and disadvantage...
journal_title:Fertility and sterility
pub_type: 杂志文章,评审
doi:10.1016/j.fertnstert.2019.07.005
更新日期:2019-09-01 00:00:00
abstract:OBJECTIVES:To determine if the total motile sperm count is predictive of IUI success and to apply life-table analysis to a large database of IUI procedures. DESIGN:Contingency table and life-table analyses were used to analyze a large group of couples (n = 546) undergoing 1,205 cycles of therapeutic IUI with husband's...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)56831-9
更新日期:1994-07-01 00:00:00
abstract:OBJECTIVE:To quantify cytoplasmic maturity on the basis of intracytoplasmic sperm injection (ICSI) injection funnel manifestation and to evaluate influence factors of the latter. DESIGN:Prospective study. SETTING:Private fertility center. PATIENT(S):A total of 31 patients with good ovarian response. INTERVENTION(S)...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2016.06.015
更新日期:2016-10-01 00:00:00
abstract:OBJECTIVE:To evaluate the effect of sperm treatment with exogenous platelet-activating factor (PAF) on IUI clinical pregnancy rate. DESIGN:Prospective randomized study. SETTING:Assisted Reproduction Unit, 2nd Department of Obstetrics and Gynecology, University of Athens, Aretaieion Hospital, Athens, Greece. SUBJECT(...
journal_title:Fertility and sterility
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/j.fertnstert.2004.07.980
更新日期:2005-03-01 00:00:00
abstract:OBJECTIVE:To identify transcripts whose expression is restricted to germ cells. DESIGN:Expressed sequence tags (ESTs) from unfertilized egg libraries were utilized to perform in silico subtraction and identify germ cell-specific transcripts. SETTING:Baylor College of Medicine, Houston, Texas. ANIMAL(S):C57BL/6J/129S...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(01)01966-5
更新日期:2001-09-01 00:00:00
abstract::Standardized, high-quality training in reproductive endocrinology, infertility, and assisted reproductive technologies (REI-ART) faces challenges owing to the high-tech nature of ART and the important country-to-country differences in clinical practice and regulations overseeing training. Moreover, while the training ...
journal_title:Fertility and sterility
pub_type: 杂志文章,评审
doi:10.1016/j.fertnstert.2015.04.031
更新日期:2015-07-01 00:00:00
abstract:OBJECTIVE:To study the in vivo mechanisms of action of ulipristal acetate (UPA) on uterine myomas. DESIGN:Retrospective histologic and immunohistochemical (IHC) study of myomas. SETTING:Academic research unit. PATIENT(S):Among 59 women with symptomatic myomas who underwent myomectomy, 42 were treated preoperatively ...
journal_title:Fertility and sterility
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.fertnstert.2015.04.025
更新日期:2015-08-01 00:00:00
abstract::Hysteroscopic visualization of the endometrium after 6 months of antitubercular therapy showed an improvement in the mucosal morphology. A closer visualization at increased magnification was helpful in demonstrating the remnants of a healing tubercular pathology after antitubercular therapy. ...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2007.07.1346
更新日期:2008-03-01 00:00:00
abstract:OBJECTIVE:To compare pregnancy rates (PRs) using blastocysts cryopreserved on day 7 with those cryopreserved on days 5 and 6. DESIGN:Retrospective observational cohort study. SETTING:Infertility center performing IVF. PATIENT(S):Eight hundred women with infertility undergoing frozen ET. INTERVENTION(S):Blastocysts ...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2013.06.021
更新日期:2013-10-01 00:00:00
abstract:OBJECTIVE:To determine the expression profiles of the DAZ gene family in men with and without spermatogenic failure. DESIGN:Prospective case study. SETTING:University-based reproductive clinics and genetics laboratory. PATIENT(S):Thirty-four infertile men presenting with azoospermia. INTERVENTION(S):The mRNA transc...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2003.08.047
更新日期:2004-04-01 00:00:00
abstract:OBJECTIVE:To evaluate the independent effects of the degree of blastocoele expansion and re-expansion and the inner cell mass (ICM) and trophectoderm (TE) grades on predicting live birth after fresh and vitrified/warmed single blastocyst transfer. DESIGN:Retrospective study. SETTING:Reproductive medical center. PATI...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2015.12.014
更新日期:2016-04-01 00:00:00
abstract:OBJECTIVE:To describe the reproductive health history and characteristics of women having bariatric surgery and to determine whether this differs by age of onset of obesity. DESIGN:Retrospective and cross-sectional analyses of self-reported survey data. SETTING:Six sites of the Longitudinal Assessment of Bariatric Su...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2009.08.028
更新日期:2010-09-01 00:00:00
abstract:OBJECTIVE:To determine whether cryptorchidism associated with azoospermia or oligozoospermia may be due to microdeletions of the Y chromosome. DESIGN:Controlled clinical study. SETTINGS:Division of Medical Genetics and the Andrology Centre, Department of Obstetrics and Gynecology, University Medical Center, Ljubljana...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(03)00375-3
更新日期:2003-06-01 00:00:00
abstract:OBJECTIVE:To assess the effectiveness of a second laparoscopic ovarian diathermy (LOD) in women with polycystic ovary syndrome (PCOS). DESIGN:Retrospective study. SETTING:Tertiary infertility clinic. PATIENT(S):Twenty anovulatory infertile women with PCOS who underwent LOD 1-6 years previously. Twelve subjects had p...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(02)04960-9
更新日期:2003-05-01 00:00:00
abstract:OBJECTIVE:To study the hormonal regulation of primary and recurrent endometriosis by comparing the levels of estrogen receptors (ER) and progesterone receptors (PR) with the levels in uterine endometrium obtained simultaneously. DESIGN:Tissue samples collected at routine operations. SETTING:One university clinic. PA...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:
更新日期:1993-07-01 00:00:00
abstract:OBJECTIVE:To evaluate endocrine characteristics and clinical outcomes in normal ovulatory patients undergoing controlled ovarian hyperstimulation (COH) with the use of a Duphaston and hMG protocol during in vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI) treatments in combination with frozen-thawed em...
journal_title:Fertility and sterility
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.fertnstert.2017.06.017
更新日期:2017-09-01 00:00:00
abstract::Cell-mediated immunity in rhesus monkeys that had been vasectomized for 2, 4, 7, or 11 years was measured by lymphocyte blastogenesis following stimulation with concanavalin A, phytohemagglutinin (PHA), and pokeweed mitogens. Several of the 7- and 11-year vasectomized animals had significantly reduced PHA reactivity w...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)42983-3
更新日期:1977-12-01 00:00:00
abstract:OBJECTIVE:To develop molecular tools increasing the sensitivity of breast cancer micrometastases detection within ovarian tissue cryopreserved for fertility preservation. DESIGN:Expression of breast markers was evaluated by quantitative polymerase chain reaction in ovarian tissue from patients with benign or cancerous...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2015.04.036
更新日期:2015-08-01 00:00:00
abstract::One hundred men with proven fertility who presented for vasectomy consultation were examined for testicular size and presence of a varicocele, including examination with the Doppler stethoscope for the presence of subclinical varicocele. A diagnosis of varicocele was established in 61%. In 17 patients, the varicocele ...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)59432-1
更新日期:1987-09-01 00:00:00
abstract:OBJECTIVE:To determine whether the use of GnRH antagonist in cycles converted from ovulation induction-IUI to IVF affects cycle outcome and pregnancy rates. DESIGN:Retrospective cohort study. SETTING:Academic research institution. PATIENT(S):One hundred eighty-two consecutive patients with ovulation induction-IUI to...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2009.01.109
更新日期:2010-02-01 00:00:00
abstract:OBJECTIVE:To examine the frequency of anomalies of the vas deferens and the frequency of mutations of the cystic fibrosis transmembrane regulator (CFTR) gene in male candidates for intracytoplasmic sperm injection (ICSI) who had severe oligoasthenoteratozoospermia. DESIGN:The clinical data for male candidates for ICSI...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(98)00050-8
更新日期:1998-05-01 00:00:00
abstract:OBJECTIVE:To assess the role of embryo secretome in modifying the molecular profile of glycodelin A (GdA) in endometrial organoids (ORG) mimicking the implantation window. To verify whether the use of embryo-conditioned culture medium at the time of the embryo transfer may increase in vitro fertilization outcome. DESI...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2020.10.058
更新日期:2021-01-23 00:00:00
abstract:OBJECTIVE:To study fertility among women treated by means of ultrasound-guided drainage and antibiotics for tubo-ovarian abscess (TOA). DESIGN:Retrospective cohort study. SETTING:A tertiary referral center. PATIENT(S):One hundred women of reproductive age treated for TOA between June 1986 and July 2003. INTERVENTIO...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2012.03.054
更新日期:2012-07-01 00:00:00
abstract::We report a patient undergoing hMG-induced superovulation who demonstrated delayed excretion of hCG, originally believed to be because of successive biochemical pregnancies. However, sequential hCG titers after administration of exogenous hCG demonstrated a longer than normal half-life for the excretion of hCG in this...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)54618-4
更新日期:1991-10-01 00:00:00
abstract:OBJECTIVE:To develop and apply efficient and reliable protocols for preimplantation genetic diagnosis (PGD) for Marfan syndrome. DESIGN:Two mutation-specific protocols were developed, and the markers D15S1028, D15S992, D15S196, D15S576, D15S123, and D15S143 were used to set up four multiplex polymerase chain reactions...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2005.12.059
更新日期:2006-08-01 00:00:00
abstract:OBJECTIVE:To assess the effectiveness of luteal start vaginal micronized P in a recurrent pregnancy loss (RPL) cohort. DESIGN:Observational cohort study using prospectively collected data. SETTING:Not applicable. PATIENT(S):Women seen between 2004 and 2012 with a history of two or more unexplained pregnancy losses <...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2016.11.029
更新日期:2017-03-01 00:00:00
abstract:OBJECTIVE:To evaluate the influence of somatostatin analogue (octreotide) in the function of hypothalamic-pituitary-adrenal (HPA) axis in women with polycystic ovary syndrome (PCOS). SETTING:Women referred to the Department of Obstetrics and Gynecology, Università Cattolica del Sacro Cuore. PATIENT(S):Twelve PCOS wom...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(97)81852-3
更新日期:1997-01-01 00:00:00