Abstract：
OBJECTIVE:Prior studies have demonstrated that cocaine binds to human placental microvillous membrane vesicles at a single high-affinity site and that both 10 and 500 nmol/L cocaine inhibit sodium-dependent alanine uptake. The purpose of this study was to characterize cocaine binding to human placental basal plasma membrane and to determine the effects of cocaine on basal vesicle uptake of alanine and leucine. STUDY DESIGN:Basal vesicles were isolated from the placentas of uncomplicated human pregnancies with no history of cocaine use. The binding of tritiated cocaine to basal vesicle membrane and the uptakes of tritiated cocaine, alanine, and leucine were determined with filtration assays. Alanine and leucine uptakes were measured in the presence and absence of sodium and 10 and 500 nmol/L cocaine. Cocaine binding was characterized with Scatchard analyses, and uptakes were compared by means of Student t tests. RESULTS:Tritiated cocaine bound to basal membrane at two separate high-affinity sites. Sodium-dependent alanine uptake was significantly inhibited only by 500 nmol/L cocaine. Sodium-independent amino acid uptake was unaffected by cocaine. CONCLUSION:Cocaine may interfere with fetal growth by impairing the activity of sodium-dependent amino acid transporters in both the microvillous and basal membrane. These membranes may be differentially sensitive to the effects of cocaine on such transporters.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Dicke JM,Verges DK,Polakoski KLdoi
10.1016/0002-9378(94)90287-9subject
Has Abstractpub_date
1994-08-01 00:00:00pages
485-91issue
2eissn
0002-9378issn
1097-6868pii
0002-9378(94)90287-9journal_volume
171pub_type
杂志文章abstract：:In this series of gonadoblastomas it appeared that the germ cells were the motivating force underlying either tumor proliferation or regression. The ultrastructural morphology confirmed the presence of undifferentiated gonadal cells with active steroid synthesis by the interstitial cells. The Call-Exner-like bodies wh...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(76)90359-8
更新日期：1976-06-15 00:00:00
abstract：OBJECTIVE:The objective of the study was to determine the relationship between nighttime delivery and neonatal encephalopathy (NE). STUDY DESIGN:The design of the study was a retrospective population-based cohort of 1,864,766 newborns at a gestation of 36 weeks or longer in California, 1999-2002. We determined the ris...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.09.022
更新日期：2011-01-01 00:00:00
abstract：:A 31-year-old nulligravid patient presented with irregular menses, severe hirsutism, and infertility. Evaluation revealed marked increases of serum androstenedione and testosterone levels and a possible ovarian mass. At operation a cystic teratoma was removed from the left ovary and bilateral wedge resection revealed ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(86)90706-4
更新日期：1986-06-01 00:00:00
abstract：OBJECTIVE:Our purpose was to determine the effect of perfusate flow or viscosity on release and action of nitric oxide in the human fetal-placental vasculature in vitro. STUDY DESIGN:Cotyledons from normal term placentas were perfused with Hanks' buffered saline solution gassed with 95% oxygen and 5% carbon dioxide, p...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(95)90327-5
更新日期：1995-09-01 00:00:00
abstract：OBJECTIVE:The objective of the study was to characterize reports to the Vaccine Adverse Event Reporting System (VAERS) in pregnant women who received seasonal influenza vaccines to assess for potential vaccine safety concerns. STUDY DESIGN:We searched VAERS for reports of adverse events (AEs) in pregnant women who rec...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.08.050
更新日期：2011-02-01 00:00:00
abstract：BACKGROUND:Induction of labor occurs in >20% of pregnancies, which equates to approximately 1 million women undergoing an induction in the United States annually. Regardless of how common inductions are, our ability to predict induction success is limited. Although multiple risk factors for a failed induction have been...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2017.11.603
更新日期：2018-02-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to determine the ability of pregnant women to incorporate sophisticated screening information about risk assessment into their decisions about invasive testing in an appropriate way. STUDY DESIGN:Assessment of risk for trisomy 21 was carried out by a combination of maternal age,...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2005.02.134
更新日期：2005-08-01 00:00:00
abstract：:The World Health Organization recommends that countries adopt more effective antiretroviral regimens to increase the effectiveness of the prevention of mother-to-child human immunodeficiency virus (HIV) transmission programs. The 2006 guidelines recommend a tiered approach for the delivery of antiretroviral to pregnan...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,实务指引,评审
doi：10.1016/j.ajog.2007.03.001
更新日期：2007-09-01 00:00:00
abstract：OBJECTIVE:The aim of the study was to determine the most cost-effective delivery management of vertex and nonvertex twin pair gestations. STUDY DESIGN:Two hundred sixty-six consecutive twin gestations were followed up prospectively in a special antepartum Twins Clinic directed by the Maternal-Fetal Medicine Division. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(98)70179-6
更新日期：1998-10-01 00:00:00
abstract：:Immunoglobulins G, M, and A were found in varying concentrations in four different human fetal anatomic compartments of 17 fetuses in the absence of apparent infection. The highest levels were noted in the thoracic cavity. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(88)80146-7
更新日期：1988-10-01 00:00:00
abstract：OBJECTIVE:The objective of this study was to critically review the indications, outcomes, complications, and costs of laparoscopically assisted vaginal hysterectomy in comparison with abdominal and vaginal hysterectomy. STUDY DESIGN:The operating room log was reviewed to determine the number and route of hysterectomie...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(93)90679-d
更新日期：1993-06-01 00:00:00
abstract：:This is a case report of a serious complication that occurred about 5 weeks after the insertion of an IUD. The patient, a 34 year old Caucasian woman, gravida 7, para 5 and abortions 2, was admitted to the hospital for chills, fever, abdominal pain, nausea, vomiting and diarrhoea which began 3 days prior to admission...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(71)90575-8
更新日期：1971-07-15 00:00:00
abstract：OBJECTIVE:Cervical inflammation has been proposed as a cofactor in the development of cervical cancer. The purpose of this study was to document the prevalence of cervical (pre)neoplastic changes in asymptomatic women with a cytologically diagnosed Gardnerella vaginalis infection. STUDY DESIGN:Data were collected from...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2008.04.036
更新日期：2008-11-01 00:00:00
abstract：:A case of late recurrence of uterine inversion is presented. Symptoms included constipation and urinary retention without uterine bleeding. Symptoms resolved 3 months after the replacement of the uterus. It is hypothesized that the symptoms were related to stretch injury to the pelvic parasympathetic nerves. Timely in...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2004.03.027
更新日期：2004-07-01 00:00:00
abstract：:A study was made of the relationship of proton T1 relaxation times and stage of the menstrual cycle. Preliminary data show that these indicators of red blood cell hydration status may be useful as objective markers of premenstrual tension. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(85)90358-8
更新日期：1985-12-01 00:00:00
abstract：OBJECTIVE:The objective of the study was to assess the prevalence of levator ani denervation and reinnervation 6 months after the first delivery. STUDY DESIGN:Ninety-six primigravida women underwent quantitative electromyography of the levator ani during the third trimester and twice postpartum. A 95% confidence inter...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2008.12.044
更新日期：2009-05-01 00:00:00
abstract：:Fifty-four pregnancies that were subsequently complicated by preeclampsia had platelet parameters and uric acid levels measured during pregnancy. The expected fall in platelet count and rise in platelet volume parameters and uric acid levels beyond those that occur in normal pregnancy were seen only in the week before...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(85)90555-1
更新日期：1985-08-15 00:00:00
abstract：OBJECTIVE:Several recent reports have demonstrated the expression of luteinizing hormone-releasing hormone receptors by human ovarian and endometrial cancers. Controversy persists on the relevance of this finding, in particular whether these receptors mediate direct antiproliferative effects of luteinizing hormone-rele...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2002.119633
更新日期：2002-02-01 00:00:00
abstract：:Despite advances in diagnostic techniques, endometriosis remains an enigmatic condition. Clinical symptoms and signs often do not correlate with the anatomic stage of the disease, and morphologic characteristics very widely. A definitive diagnosis can be established only by direct visualization, usually by laparoscopy...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(90)90431-6
更新日期：1990-02-01 00:00:00
abstract：:Ultrasonography can accurately determine phenotypic sex differences from those of the genetic sex. Two cases were identified; they were the result of a translocation of the SRY gene from the Y chromosome to the X chromosome during meiosis. An ultrasonographic difference may represent an otherwise unsuspected genetic a...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(99)70673-3
更新日期：1999-04-01 00:00:00
abstract：:The significance of midline wavering in the central nervous system as a diagnostic sign in hydrocephalus was evaluated prospectively in 27 hydrocephalic fetuses. No normal fetuses in a control group exhibited a wavering midline at three different times in pregnancy. Wavering along the entire length of the midline was ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(84)90254-0
更新日期：1984-07-15 00:00:00
abstract：BACKGROUND:The relative impact of age, pregnancy, and vaginal delivery on symptomatic pelvic organ prolapse is still an unresolved issue that involves the controversial question about the protective effect of cesarean section. OBJECTIVE:The purpose of this study was to compare the age-related prevalence of symptomatic...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2019.10.007
更新日期：2020-04-01 00:00:00
abstract：:Abnormal uterine bleeding is often the presenting complaint in women with underlying coagulopathies. A clear understanding of the pathophysiology of common bleeding disorders will help the practicing obstetrician/gynecologist in the diagnosis and treatment of these conditions. The normal hemostatic process can be divi...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/s0002-9378(96)80083-4
更新日期：1996-09-01 00:00:00
abstract：:Prostacyclin synthesis is severely depressed in the umbilical arteries of neonates of mothers with gestational diabetes mellitus, juvenile-onset diabetes mellitus, or preeclamptic symptoms, and of mothers who smoke during pregnancy and diabetic mothers who smoke. The reduced production of prostacyclin might be respons...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(82)90354-4
更新日期：1982-12-01 00:00:00
abstract：:Three hundred and eight-four cases of clear cell adenocarcinoma of the vagina and cervix accessioned in the Registry as of December 31, 1978, have been analyzed. The annual incidence of these tumors has been found to correspond closely to the estimated usage of diethylstilbestrol (DES) for pregnancy support in the Uni...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(79)90814-7
更新日期：1979-12-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to define the rate of neoplasia in prophylactic surgical specimens with the use of a careful surgical and pathologic protocol in a prospective study of high-risk women who were undergoing risk-reducing salpingo-oophorectomy. Outcomes of interest were neoplasia that was identified...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2006.03.006
更新日期：2006-06-01 00:00:00
abstract：:We analyzed interview and record review data from 9,823 deliveries to evaluate the relationship between prior history of induced abortion and subsequent late pregnancy outcomes. Complications such as bleeding in the first and third trimesters, abnormal presentations and premature rupture of the membranes, abruptio pla...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(83)91041-4
更新日期：1983-05-15 00:00:00
abstract：:Blood volume (BV), plasma volume (PV), red cell volume (RCV), cardiac output (CO), and organ blood flows were measured in nonpregnant (Group I), 10 to 19 days' pregnant (Group II), and 20 to 30 days' pregnant (Group III) rabbits. BV, PV, and RCV increased throughout pregnancy, with maximum increase during the second t...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(16)32982-9
更新日期：1979-11-01 00:00:00
abstract：:Endocrine disrupting chemicals (EDCs) are defined as exogenous chemicals, or mixtures of chemicals, that can interfere with any aspect of hormone action. The field of endocrine disruption is historically rooted in wildlife biology and reproductive endocrinology where EDCs are demonstrated contributors to infertility, ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2016.01.182
更新日期：2016-05-01 00:00:00
abstract：BACKGROUND:Fibroid tumors are the most common benign tumors in women of reproductive age. Treatment is usually indicated for those who are symptomatic, with different techniques being used. OBJECTIVE:The purpose of this study was to compare the long-term outcome of laparoscopic myomectomy with magnetic resonance-guide...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2018.09.002
更新日期：2018-10-01 00:00:00
