Abstract：
OBJECTIVE:We tested the hypothesis that oxytocin (OT) contracts blood vessels via vasopressin V1A (VP) receptors, and that this depends on pregnancy. STUDY DESIGN:Concentration-contraction relationships (CCR) to OT and VP (10(-12)-10(-6) mol/L) were obtained in different blood vessels. CCR were obtained in uterine arteries (UA) from nonpregnant, mid-pregnant, and late pregnant rats (n = 6-10 per group) in the absence and presence of selective antagonists (10(-7) mol/L). RESULTS:Sensitivity to OT, but not to VP, is attenuated in pregnant rat UA. Antagonists shifted CCR of OT and VP to the right, and, to a lesser extent, of the counterpart, in all UA. VP antagonist depresses oxytocin CCR much more than OT antagonist in pregnant rat UA. CONCLUSION:OT and VP contract UA via their own receptors, although partial cross-activation is evident. Adaptation to pregnancy led to attenuated sensitivity of UA smooth muscle to OT and transformed OT receptors into VP-like ones.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Vedernikov YP,Betancourt A,Wentz MJ,Saade GR,Garfield REdoi
10.1016/j.ajog.2005.05.006subject
Has Abstractpub_date
2006-01-01 00:00:00pages
252-60issue
1eissn
0002-9378issn
1097-6868pii
S0002-9378(05)00648-4journal_volume
194pub_type
杂志文章abstract：OBJECTIVE:The purpose of this study was to evaluate the effect of prophylactic vaginal progesterone in decreasing preterm birth rate in a high-risk population. STUDY DESIGN:A randomized, double-blind, placebo-controlled study included 142 high-risk singleton pregnancies. Progesterone (100 mg) or placebo was administer...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1067/mob.2003.41
更新日期：2003-02-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to report the clinical experience collated from the 1995 and 1997 case list summary sheets of United States and Canadian active candidates who were completing the American Board of Obstetrics and Gynecology oral examination for the first time. STUDY DESIGN:Data from the case lis...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2001.119181
更新日期：2001-12-01 00:00:00
abstract：OBJECTIVE:This study was undertaken to compare the effectiveness of fixation of the vaginal apex to the coccygeus fascia with fixation to the sacrospinous ligament during surgical repair of vaginal vault eversion with enterocele. STUDY DESIGN:The records of 121 patients with posthysterectomy vaginal vault eversion wit...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(95)91429-3
更新日期：1995-06-01 00:00:00
abstract：:We have studied the effects of magnesium sulfate (MgSO4) administration in chronically instrumented normotensive and hypertensive pregnant sheep. Animals of 90 to 144 days' gestation were divided in two groups; those with normotensive arterial pressure and those in which renovascular hypertension had been produced. Ou...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(77)90255-1
更新日期：1977-04-01 00:00:00
abstract：:Relaxin is a peptide hormone produced by the corpus luteum during pregnancy in human beings. There are no extraluteal sites of production of relaxin in women. By means of a heterologous porcine radioimmunoassay, serial serum relaxin concentrations were determined in three women throughout pregnancy and into labor. All...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1979-09-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to investigate the potential efficacy of high-intensity focused ultrasound for the treatment of uterine fibroid tumors in a nude mouse model. STUDY DESIGN:A total of 60 female athymic nude mice were inoculated subcutaneously with 3 to 5 x 10(6) ELT-3 cells, a uterine fibroid tum...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2000.105347
更新日期：2000-07-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to determine the effect of discordant fetal growth on subsequent perinatal and neonatal outcome for different degrees of birth weight discordance in preterm twin gestations. STUDY DESIGN:One hundred twenty-two live born twin sets delivered between 25 and 34 completed weeks' gest...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(95)90027-6
更新日期：1995-03-01 00:00:00
abstract：OBJECTIVE:We quantified the impact of chorioamnionitis on both the white and gray matter structures of the preterm ovine central nervous system (CNS). STUDY DESIGN:The CNS was studied at 125 days of gestation, either 2 or 14 days after the intraamniotic administration of 10 mg of lipopolysaccharide (LPS) (Escherichia ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2008.12.003
更新日期：2009-04-01 00:00:00
abstract：OBJECTIVE:This study was undertaken to address the role of oxidative stress in preeclampsia. STUDY DESIGN:We measured urinary 8,12-iso-iPF(2alpha)-VI, a chemically stable, free-radical catalyzed product, in a case control study of severe preeclampsia nested within the trial of Calcium for Preeclampsia Prevention. Case...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2001.116754
更新日期：2001-09-01 00:00:00
abstract：:Basic research during the past two decades has led to increased awareness of the role of lipid peroxidation in various physiologic and pathophysiologic processes. A number of reports indicate that preeclampsia is associated with elevated blood levels of lipid peroxidation products. In view of its potentially destructi...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/0002-9378(89)90778-3
更新日期：1989-10-01 00:00:00
abstract：:In pregnancy a decrease in fibrinolytic activity, which is due to an increase in plasminogen activator inhibitor activity and plasminogen activator inhibitor type 1 and type 2, has been described. Because the placenta is a source of both type 1 and type 2 plasminogen activator inhibitor, we have studied them and other...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(91)90242-j
更新日期：1991-07-01 00:00:00
abstract：:Maternal, fetal, and neonatal results and complications were analyzed after 923 genetic amniocenteses. Maternal age of 35 years and beyond was associated with a 2.0% risk of fetal trisomy 21 and a 3.0% risk of all major chromosome abnormalities. Comparable rates for women aged 40 and beyond were 4.8% and 7.2%. Neural ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1983-05-15 00:00:00
abstract：:This systematic review of uterosacral ligament suspension provides a metaanalysis of anatomic outcomes and a summary of subjective outcomes. A successful anatomic outcome was considered present when women had "optimal" or "satisfactory" (pelvic organ prolapse quantification system stage 0 or 1) outcomes. In the anteri...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,meta分析,评审
doi：10.1016/j.ajog.2009.07.052
更新日期：2010-02-01 00:00:00
abstract：OBJECTIVE:With no single regimen recognized as the standard for the treatment of first trimester cervical pregnancy, this report offers a successful treatment option with suction curettage and balloon tamponade. STUDY DESIGN:This is a retrospective review, with institutional review board approval, of 13 consecutive fi...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2014.03.057
更新日期：2014-06-01 00:00:00
abstract：:Since previous data suggested hyperresponsiveness to human menopausal gonadotropin by women with low body weight, the daily dose was reduced to 1.5 ampules in patients undergoing in vitro fertilization weighing less than 55 kg. This allowed the extension of treatment to a minimum of 6 days. These changes were associat...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(88)90778-8
更新日期：1988-01-01 00:00:00
abstract：:A letter is written in response to a report by Drs. Beric, Kupresanin, and Hulka (Am. J, Obslet Gynecol. 114: 273, 1972) which stated that the Karman catheter is not suitable for terminating pregnancies beyond Week 6 of pregnancy. The use of a Karman catheter in terminating pregnancies of 7-10 weeks resulted in 47% t...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(73)91070-3
更新日期：1973-05-15 00:00:00
abstract：OBJECTIVE:Our purpose was to assess the efficacy of double- and triple-screening paradigms for Down syndrome and to develop a more logical, statistical approach to risk prediction that will decrease the cost of screening and allow the incorporation of new parameters appropriately weighted for their contribution. STUDY...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(95)91472-2
更新日期：1995-04-01 00:00:00
abstract：OBJECTIVE:Our purpose was to evaluate the effect of breast-feeding frequency on serum bilirubin levels in the first 3 days after birth. STUDY DESIGN:Two hundred seventy-five infants were randomly assigned to a frequent or demand breast-feeding schedule. RESULTS:Infants in the frequent group (n = 131) nursed nine (7.5...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/s0002-9378(94)70302-7
更新日期：1994-03-01 00:00:00
abstract：OBJECTIVE:Our purpose was to determine the maximal fetal exposure to radiation by use of thermoluminescent dosimeters when pelvic measurements were performed by standard or modified digital radiography. STUDY DESIGN:Digital radiography of the pelvis was performed according to a standard technique. Lithium fluoride the...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(96)70133-3
更新日期：1996-08-01 00:00:00
abstract：:Recently, vasoactive intestinal polypeptide (VIP) has been localized in nerve fibers in the human female genital tract. In the present investigation, the effect and concentration of VIP was studied in uterine tissue from pregnant and nonpregnant women, and the plasma concentration of VIP was measured in relationship t...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(82)90083-7
更新日期：1982-06-15 00:00:00
abstract：:A clinical study was designed to test whether sustained administration of progesterone to nursing mothers could prolong lactation and delay the postpartum recovery of fertility. The hormone was administered by subdermal implantation of six pellets that each contained 100 mg of progesterone. This treatment was administ...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章
doi：
更新日期：1982-09-15 00:00:00
abstract：OBJECTIVE:We conducted a meta-analysis using individual patient data to examine the efficacy of exercise for improving bone mineral density at the femoral neck in postmenopausal women. STUDY DESIGN:Ten controlled clinical trials that included 595 subjects (aged 42-92 years) met our criteria for inclusion. Changes in f...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,meta分析
doi：10.1016/j.ajog.2005.09.006
更新日期：2006-03-01 00:00:00
abstract：OBJECTIVE:The physiopathology of preeclampsia is still unclear, but an imbalance between reactive oxygen species (ROS) and antioxidants, also called oxidative stress, appears to be an important contributing factor. The ROS promote lipid oxidation and are known to induce stress proteins, such as hemeoxygenase 1 (HO-1) a...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2008.12.031
更新日期：2009-05-01 00:00:00
abstract：:This study was undertaken to determine the effect of choice of birth route on infant outcome in fetal breech presentation. The study group excluded infants who were footling breeches and infants with major congenital anomalies. The mothers were in labor with the fetal heartbeat present at entry into the labor room. Ou...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(84)90533-7
更新日期：1984-04-01 00:00:00
abstract：OBJECTIVE:This study was undertaken to examine routine cervical cancer screening diagnoses and outcomes on an age-specific basis in a US population. STUDY DESIGN:We conducted an observational cohort study using 1997-2002 health plan administrative and laboratory data for women enrolled at Kaiser Permanente Northwest (...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2004.01.043
更新日期：2004-07-01 00:00:00
abstract：OBJECTIVE:Our purpose was to report the cancers arising during a familial ovarian cancer screening program and investigate the tumor's clonality and association with BRCA1 and BRCA2 mutations. STUDY DESIGN:Program participants with a diagnosis of ovarian cancer or peritoneal serous papillary carcinoma were identified ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(99)70663-0
更新日期：1999-04-01 00:00:00
abstract：:The Amniostat-FLM rapid slide test (Hana Biologics, Inc., Alameda, Calif.) for detection of phosphatidylglycerol has previously been evaluated and has shown good correlation with the more sophisticated two-dimensional thin-layer chromatographic method. A new, ultrasensitive kit has now been released with a lower level...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90429-8
更新日期：1989-02-01 00:00:00
abstract：:Fetal outcome in 98 patients with spontaneous antepartum late decelerations was studied by combining the data of two obstetric departments. Heart rate variability was used to classify the different patterns into two categories: terminal and decelerative. In 14 of the 47 pregnancies in which a terminal pattern was foun...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(80)90141-6
更新日期：1980-10-15 00:00:00
abstract：OBJECTIVE:The objective of this study was to assess the reliability and validity of an objective structured assessment of technical skills (OSATS) for repair of fourth-degree obstetric lacerations on a surgical model. STUDY DESIGN:Three blinded judges reviewed recordings of 20 junior and 20 senior obstetrics-gynecolog...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2008.07.054
更新日期：2008-12-01 00:00:00
abstract：:Intravenous hydralazine was administered to 16 spontaneously hypertensive rats on day 21 of gestation. The radioactive labeled microsphere technique was used to assess the change in organ perfusion produced by the drug. Vascular resistance to most organs was decreased, except to the placentas, stomach, and cecum, wher...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(87)90283-3
更新日期：1987-02-01 00:00:00
