Abstract:
BACKGROUND:A hypoxic environment is known to be essential for early placentation. A low oxygen tension induces hypoxia-inducible factor-1 (HIF-1alpha) which may play an important role as a transcription factor in maintaining the proliferative and undifferentiated phenotype in human trophoblasts. METHODS:We analyzed the effect of a low oxygen tension on the rat trophoblast giant cell differentiation pathway using Rcho-1 cells which were derived from rat choriocarcinomas and consist of trophoblast stem cells. RESULTS:We found that a low oxygen tension suppressed the morphological changes and steroidogenesis during differentiation. The anticipated downregulation of the Id-1 transcription factor, a negative regulator of trophoblast giant cell differentiation, was not observed in the hypoxic environment. On the other hand, deferoxamine, which mimics hypoxia and induces HIF-1alpha, caused downregulation of Id-1 transcription factor and trophoblast giant cell differentiation. CONCLUSION:These results indicate that hypoxia represses rat trophoblast giant cell differentiation via an HIF-1alpha-independent pathway.
journal_name
Gynecol Obstet Investjournal_title
Gynecologic and obstetric investigationauthors
Takeda T,Sakata M,Isobe A,Yamamoto T,Nishimoto F,Minekawa R,Okamoto Y,Tasaka K,Murata Ydoi
10.1159/000097634subject
Has Abstractpub_date
2007-01-01 00:00:00pages
188-94issue
4eissn
0378-7346issn
1423-002Xpii
97634journal_volume
63pub_type
杂志文章abstract::Fetal atrial septal aneurysm (ASA) is uncommon and little is known regarding its prevalence and clinical significance. In this report we describe 2 cases of fetal ASA diagnosed by ultrasonography. They were referred for examination because of fetal tachyarrhythmia in 1 case, and polyhydramnios in the other. The first ...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章,评审
doi:10.1159/000292030
更新日期:1996-01-01 00:00:00
abstract::Maternofetal transfer of ritodrine and its effect on placental glucose and oxygen consumption were studied using a recycling perfusion of maternal and fetal circulations of an isolated cotyledon of a term human placenta. 3H-labeled ritodrine was introduced into the maternal side of the perfusion system. Transfer was c...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000292983
更新日期:1991-01-01 00:00:00
abstract:OBJECTIVE:The purpose of this study is to investigate the in vivo magnetic resonance spectroscopy features of uterine leiomyomas using long echo time and to characterize the spectral patterns of these lesions. METHODS:We calculated metabolites in 15 patients with uterine leiomyomas and myometrium of 20 healthy control...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000080020
更新日期:2004-01-01 00:00:00
abstract::Placental hemosiderin deposition representing intrauterine bleeding at least 24-48 h before delivery is detected frequently in prematurity. The objective of this study was to assess incidence and site of histologic evidence of intrauterine bleeding in association with fetal growth in prematurity. Placentas of consecut...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000010289
更新日期:2000-01-01 00:00:00
abstract::The psychological state of 102 infertile women undergoing in vitro fertilization and embryo transfer was investigated. The levels of anxiety were measured by the state trait anxiety inventory and the manifest anxiety scale. The process of accepting infertility and attitudes toward treatment were explored by a semistru...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000291510
更新日期:1997-01-01 00:00:00
abstract::The 784 cases, from which 701 complained of abnormal uterine bleeding, were reviewed by age groups, presenting symptoms, sex steroid medication and endometrial findings. Endometrial polyps and endometritis, which showed an incidence of 17.5 and 10.0%, respectively, were correlated with clinicopathologic findings. Peri...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000299980
更新日期:1979-01-01 00:00:00
abstract::We studied the effects of caffeine ingestion during pregnancy. A total number of 9,921 healthy pregnant women with a gestational age after 24 weeks were subjected to the study. The women who drank more than 5 cups of coffee per day had a high incidence of impending abortion, premature labor, and fetuses small for gest...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000299032
更新日期:1985-01-01 00:00:00
abstract::Fetal echocardiographic and Doppler ultrasonographic prospective studies were performed in utero on 299 babies delivered at Hirata Municipal Hospital, Shimane, Japan, from May 1984 to June 1986. Two or three ultrasonographic examinations were performed on each fetus from 20 weeks of gestation to term. Three congenital...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000293682
更新日期:1988-01-01 00:00:00
abstract:BACKGROUNDS:What is not clear as yet is not only the etiology, but also the management of osseous metaplasia. We describe an infertile patient with osseous metaplasia and subsequent pregnancy after treatment and review the literature from infertility perspective. METHOD:We presented a 30-year-old woman with 8 years of...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章,评审
doi:10.1159/000439529
更新日期:2015-01-01 00:00:00
abstract::Adenocarcinoma of the endometrium with intrauterine pregnancy is extremely rare. We report the case of a 35-year-old woman with endometrial cancer discovered in the 7th gestational week. A therapeutic abortion was performed and because of bleeding and spotting dilatation and curettage was done 10 days later. Histology...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000292043
更新日期:1996-01-01 00:00:00
abstract::ABO blood group was analyzed in 70 patients with hydatidiform mole and 53 patients with malignant trophoblastic disease. 319 healthy pregnant women served as controls. The distribution of ABO blood groups in patients with hydatidiform mole did not deviate significantly from the distribution in the controls. There was ...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000298967
更新日期:1985-01-01 00:00:00
abstract:OBJECTIVE:To describe three-dimensional (3-D) sonographic features of hydrops fetalis. METHODS:A total of 6 cases with hydrops fetalis from 15 to 32 weeks of gestation were studied with transabdominal 3-D sonography (3.5 MHz). RESULTS:Before around 20 weeks of gestation, the skin becomes a transparent-like structure,...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000010167
更新日期:1999-01-01 00:00:00
abstract:AIM:To evaluate the clinical application of the new Hologic quantitative foetal fibronectin (qfFN) bedside test for the prediction of spontaneous preterm birth (sPTB) in patients with symptoms suggestive of spontaneous threatened preterm labour (sPTL). METHODS:A prospective observational study with 154 pregnant women ...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000480235
更新日期:2018-01-01 00:00:00
abstract:BACKGROUND/AIM:We aimed to assess the value of early laparoscopic therapy in management of tubo-ovarian abscess (TOA) or pelvic abscess. METHODS:This was a retrospective study of all consecutive patients who were initially diagnosed with TOA or pelvic abscess at the local hospital between January 2010 and December 201...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000493855
更新日期:2019-01-01 00:00:00
abstract:BACKGROUND:Epithelial ovarian carcinoma produces steroid hormones that may be of prognostic importance. The steroids are mainly bound to plasma albumin and sex hormone-binding globulin. Alterations in plasma protein levels influence hormonal effects. As plasma prealbumin may reflect changes in the patient's clinical st...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000292542
更新日期:1994-01-01 00:00:00
abstract::Among angiogenic factors, VEGF secreted from activated macrophages under the influence of ovarian steroids, IL-8 expressed in endometrial stromal cells, and basic FGF expressed in endometriotic tissue and PD-ECGF expressed in lining epithelial cells independently of the sex steroidal milieu might contribute to the cha...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章,评审
doi:10.1159/000052864
更新日期:1999-01-01 00:00:00
abstract::Progesterone secretion of cultured human granulosa cells treated with LHRH or its analogues was measured. Granulosa cells were also stimulated with LH, FSH, cAMP or forskolin. No differences could be observed in the progesterone basal secretion of cultures treated with or without LHRH or its analogues and after the va...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000292765
更新日期:1992-01-01 00:00:00
abstract::A decade of perinatal audit in the Maputo Central Hospital is reviewed with the objective of addressing the potential value of the audit process in monitoring the different constituents of morbidity and mortality in the perinatal period. The perinatal mortality showed a significant but transient change during the obse...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000292637
更新日期:1993-01-01 00:00:00
abstract::A dietary approach has proven to be effective in alleviating symptoms of premenstrual syndrome. In our previous studies, magnesium improved premenstrual irritability and mood scoings. In this double-blind, placebo-controlled study, we evaluated the effects of a new dietetic preparation (Sillix Donna, Giuliani) in 40 p...
journal_title:Gynecologic and obstetric investigation
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1159/000291836
更新日期:1997-01-01 00:00:00
abstract:OBJECTIVE:To evaluate whether prolactin, alpha-fetoprotein (AFP) or B-human chorionic gonadotropin (BHCG) is the most effective marker in vaginal fluid for diagnosing prelabor rupture of membranes (PROM). These proteins are present in amniotic and vaginal fluid and have been reported to be potent markers of PROM, but h...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000097844
更新日期:2007-01-01 00:00:00
abstract::A small dermatan sulphate proteoglycan has been isolated from the human uterine cervix. The concentration of this proteoglycan has been shown to decrease during pregnancy. To study the mechanism behind this change fibroblasts from the human uterine cervix were established in culture. Their synthesis and secretion of p...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000299026
更新日期:1985-01-01 00:00:00
abstract:INTRODUCTION:The role of defective fimbrio-ovarian relation in cases of unexplained infertility has not been extensively studied. The aim of the study was to assess the role of fimbrio-ovarian relation as an investigative modality in women with unexplained infertility. We also aimed to evaluate the efficacy of superovu...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000086004
更新日期:2005-01-01 00:00:00
abstract::We present the unusual case of a 27-year-old Japanese woman who exhibited recurrences of metastatic tumors from uterine leiomyosarcoma after five operations. Chemotherapy with cisplatin, pirarubicin, and cyclophosphamide was ineffective. Substituting ifosfamide for cyclophosphamide, we obtained a complete response. Th...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000291415
更新日期:1997-01-01 00:00:00
abstract::Since not all problems in endometriosis can be studied in the human, there is need of an animal model. We transplanted endometrial tissue of the rabbit into the peritoneal cavity and studied the changes after 12 weeks. At that time the endometrial implants in the rabbit had become cystic structures. The macroscopic an...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000293611
更新日期:1989-01-01 00:00:00
abstract::Pre-implantation blastocysts or trophoblast, obtained from ectoplacental cones, were transferred to the right oviducts of both pregnant and nonpregnant mice. Blastocysts which remained within the oviductal lumen did not show evidence of further differentiation into trophoblast although they readily implanted on variou...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000299117
更新日期:1984-01-01 00:00:00
abstract::Pathologic material was reviewed and survival data were obtained on 182 of the endometrial cancer patients reported in our previous study (1975) to compare histopathologic characteristics and clinical behavior (survival) between endometrial adenocarcinoma in estrogen users and nonusers. In addition, relative risk esti...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000299600
更新日期:1981-01-01 00:00:00
abstract::We report 2 cases of true uterine artery aneurysms diagnosed during pregnancy. Both cases presented with nonspecific symptoms such as urethral obstruction, minimal vaginal bleeding and lower abdominal pain in the 2nd trimester. Both aneurysms were diagnosed by color Doppler ultrasound. In the first case labor was indu...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000449384
更新日期:2017-01-01 00:00:00
abstract::A prospective randomized trial comprising 90 patients was undertaken to evaluate three different regimens of tinidazole in the treatment of anaerobic vaginosis. Each group consisted of 30 women. The three regimens were: (A) oral tinidazole (150 mg X 2) for 7 days, (B) same oral treatment as above but also the partner ...
journal_title:Gynecologic and obstetric investigation
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1159/000293524
更新日期:1989-01-01 00:00:00
abstract::The rate of spontaneous and methotrexate (MTX)-induced chromosome breakage was studied in individuals with a history of habitual abortions in whom a structural chromosomal aberration was found in a single cell during routine cytogenetic analysis. Twelve such individuals were selected because they were not under the in...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000292599
更新日期:1993-01-01 00:00:00
abstract::In order to investigate the effect of hormone replacement therapy (HRT) on plasma homocysteine and C-reactive protein (CRP) levels 46 healthy postmenopausal women were prospectively enrolled. HRT, which was either 0.625 mg/day conjugated equine estrogen (CEE) plus 2.5 mg/day medroxyprogesterone acetate (MPA) or 0.625 ...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000049412
更新日期:2002-01-01 00:00:00