Abstract:
:Serine proteases such as plasminogen activators are produced by granulosa cells both in vivo and in vitro and have been implicated in the process of ovulation. For a study of potential roles of serine proteases in early follicular development, immature rats were injected with pregnant mare serum gonadotropin, followed 2 hours later by laparotomy and injection of the serine protease inhibitors benzamidine and epsilon-aminocaproic acid into the bursa of one ovary. As a control, saline solution was injected into the contralateral bursa. Animals were put to death 48 hours after injection of serine protease inhibitors, and three to five randomly selected longitudinal sections were evaluated by computerized morphometry. The area occupied by antral follicles relative to the total cross-sectional area of each section was computed. Resultant ratios from serine protease inhibitor-treated ovaries were compared with those from contralateral control ovaries. Ninety-three percent of serine protease inhibitor-treated ovaries showed a reduction in antral follicular size when compared with corresponding control ovaries, which is indicative of inhibitory effects of serine protease inhibitor treatment on folliculogenesis. To further investigate this effect, ovulation was induced by human chorionic gonadotropin administration 48 hours after pregnant mare serum gonadotropin and 46 hours after serine protease inhibitor or saline solution treatment. Animals were put to death 20 hours later and the number of oocytes ovulated into oviducts was determined. Oviducts from serine protease inhibitor-treated ovaries contained 51% fewer oocytes than their control counterparts. Artifacts of surgical stress or vascular diffusion of serine protease inhibitor from treated to control sides were ruled out by appropriate control experiments. We conclude that early serine protease inhibitor treatment of pregnant mare serum gonadotropin-stimulated rat ovaries impairs folliculogenesis. Thus, in addition to involvement in ovulation, serine proteases appear to play important roles throughout follicular development.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Pellicer A,Lightman A,Ariza A,DeCherney AH,Naftolin F,Littlefield BAdoi
10.1016/0002-9378(88)90051-8subject
Has Abstractpub_date
1988-03-01 00:00:00pages
670-6issue
3 Pt 1eissn
0002-9378issn
1097-6868pii
0002-9378(88)90051-8journal_volume
158pub_type
杂志文章abstract::Fetal plasma amino acid concentrations were obtained by cordocentesis at midgestation in 11 normal (appropriate for gestational age) fetuses and at late gestation in 12 small-for-gestational-age fetuses, and at cesarean section in 14 normal term infants. In normal fetuses total molar amino acid concentrations and feta...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(90)90860-a
更新日期:1990-01-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to determine factors responsible for the increasing number of deaths from corpus cancer over three time periods. STUDY DESIGN:Data were collected from the Surveillance, Epidemiology and End Results database from 1988-2001. Kaplan-Meier and Cox proportional hazards regression ana...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2007.08.075
更新日期:2008-02-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to determine cervical cancer screening practices of obstetrician/gynecologists in the US after recent revised guidelines. STUDY DESIGN:Questionnaires were mailed to 355 randomly selected US obstetrician/gynecologists. Questions were structured as clinical vignettes. RESULTS:Que...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2004.09.026
更新日期:2005-02-01 00:00:00
abstract::Static pressure is defined as the pressure existing at all points in the circulation when the heart is stopped and is a determinant of cardiac output and blood pressure. By using the proposed relationship that static pressure = cardiac output X "resistance to venous return," estimates were made of peripheral static pr...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(85)80158-7
更新日期:1985-06-15 00:00:00
abstract:OBJECTIVE:The purpose of this study was to identify the factors that affect the quality of cytologic cervical cancer screening conducted in public sector clinics in Sonora, Mexico. STUDY DESIGN:We assessed the quality of cervical cytology before and after a 2-hour training session and the implementation of cervical sp...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1067/s0002-9378(03)00490-3
更新日期:2003-08-01 00:00:00
abstract::Maternal and fetal cord leukocytes were tested in cytotoxicity assays against cultured autochthonous trophoblast cells. Significant lysis occurred with both categories of leukocyte, but the degree of cytotoxicity was less with fetal cells. These results suggest reduced fetal immunocompetence, the presence of fetal sup...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(80)90251-3
更新日期:1980-10-01 00:00:00
abstract::The concentrations of prolactin in the milk of nine postpartum lactating mothers were determined by radioimmunoassay between days 3 to 280 of the puerperium (n = 324 samples). In addition, prolactin in milk was also determined at the beginning and the end of suckling in three of the same women, who provided 21 paired ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(88)90032-4
更新日期:1988-03-01 00:00:00
abstract:OBJECTIVE:Our purpose was determine whether there are ethnic differences in vaginal colonization with organisms reputed to be associated with preterm delivery. STUDY DESIGN:In seven urban medical centers in the United States from 1984 to 1989, 13,747 predominantly low-socioeconomic-status women at 23 to 26 weeks' gest...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(96)70617-8
更新日期:1996-05-01 00:00:00
abstract::Current concepts of the pathogenesis of preeclampsia involve the generalized dysfunction of maternal vascular endothelial cells. We measured the endothelial isoform of fibronectin as a marker of endothelial cell injury throughout pregnancy in a prospective, case-control study. Nineteen women met strict criteria for th...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(91)90435-t
更新日期:1991-10-01 00:00:00
abstract::Fifty-five ewes with chronically catheterized singleton gestations were studied to assess changes in basal concentrations of fetal catecholamines with increasing gestational age. All pregnancies were time dated, and measurements of catecholamines were conducted at least 5 days after placement of fetal catheters when f...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(84)90157-1
更新日期:1984-06-15 00:00:00
abstract::Myoelectrical activity and progesterone (P) and 17 beta-estradiol (E2) concentrations were measured in 12 human oviducts with tubal pregnancy. Spikes were frequently superimposed on a single, smooth, slow wave. The region above a large conceptus (P dominance) was inactive in eight of 10 oviducts. The myoelectrical act...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(84)80166-0
更新日期:1984-01-15 00:00:00
abstract::A sensitive and specific double antibody radioimmunoassay for gonadotropin-releasing hormone (GnRH) has been developed for measurement in ethanol extracts of human plasma. Iodinated hormone was prepared with the use of the chloramine-T method, and antibodies were developed in rabbits over a six-month period with a GnR...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(76)90090-9
更新日期:1976-02-15 00:00:00
abstract:OBJECTIVE:Our goal was to achieve a good pregnancy rate after in vitro fertilization; more than one embryo, if available, is transferred to the uterine cavity. This is a recognition of the low implantation rates of embryos from in vitro fertilization. A consequence of this can be high-order multiple implantation with o...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(97)70197-2
更新日期:1997-08-01 00:00:00
abstract:OBJECTIVE:To summarize what is known about satisfaction with childbirth, with particular attention to the roles of pain and pain relief. STUDY DESIGN:A systematic review of 137 reports of factors influencing women's evaluations of their childbirth experiences. The reports included descriptive studies, randomized contr...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1067/mob.2002.121141
更新日期:2002-05-01 00:00:00
abstract::Nuchal cords can be diagnosed prenatally with ultrasonographic imaging. A prospective study determined the timing of nuchal cord formation and, in some cases, resolution before delivery. ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(95)90337-2
更新日期:1995-09-01 00:00:00
abstract:OBJECTIVE:Water absorption across the fetal chorioamniotic membranes is a critical regulatory pathway for amniotic fluid volume homeostasis. Aquaporins are cell membrane proteins that significantly enhance membrane permeability to water by acting as water channels. We recently demonstrated that aquaporin 8 is expressed...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1067/mob.2003.214
更新日期:2003-04-01 00:00:00
abstract::Glycosylated hemoglobin and glycosylated serum protein have been suggested as tools for evaluation of long- and short-term glycemic control, respectively. Twenty-six patients with gestational diabetes were prospectively studied to determine the relationship of glycosylated hemoglobin and glycosylated serum protein to ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(87)80032-7
更新日期:1987-09-01 00:00:00
abstract:OBJECTIVE:The objective of the study was to estimate the impact of human immunodeficiency virus (HIV) infection on the incidence of high-grade cervical intraepithelial neoplasia (CIN). STUDY DESIGN:HIV-seropositive and comparison seronegative women enrolled in a prospective US cohort study were followed up with semian...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2014.12.003
更新日期:2015-05-01 00:00:00
abstract::This article is from the "To The Point" series prepared by the Association of Professors of Gynecology and Obstetrics Undergraduate Medical Education Committee. The purpose of this review was to provide an overview of the importance of well-being in medical education. A literature search was performed by a Reference L...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1016/j.ajog.2019.05.012
更新日期:2019-12-01 00:00:00
abstract:OBJECTIVE:The objective of the study was to determine in the rat model whether the uterotonic action of vasopressin is mediated by the vasopressin V1a receptor in the uterus, by the oxytocin receptor, or by both. The purpose is to assess whether the anti-V1a activity of oxytocin antagonists is a desirable pharmacologic...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(96)70050-9
更新日期:1996-11-01 00:00:00
abstract:OBJECTIVE:Our purpose was to study the effects of long-term treatment with magnesium sulfate on hypoxic-ischemic brain damage in newborn rats. STUDY DESIGN:Seven-day-old rat pups (n = 120) were exposed to unilateral carotid artery ligation and 2 hours of hypoxia (8% oxygen in 92% nitrogen). Neuronal loss was evaluated...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1067/mob.2001.108343
更新日期:2001-01-01 00:00:00
abstract::A 13-year-old patient with an ovarian abscess caused by Salmonella paratyphi C1-7 had positive stool cultures for the same organism. She recovered after surgical removal of the abscess and intravenous antibiotics. ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(95)90118-3
更新日期:1995-01-01 00:00:00
abstract::Prospective pregnancy evaluation through the combined use of a radioimmunoassay (RIA) for the beta-subunit of human chorionic gonadotropin (beta-hCG) and ultrasound during the first 42 days of gestation after ovulation was performed on a population asymptomatic for first-trimester spontaneous abortion. One hundred for...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(83)90977-8
更新日期:1983-08-15 00:00:00
abstract:OBJECTIVE:A depressed skull fracture is an inward buckling of the calvarial bones and is referred to as a "ping-pong" fracture. This study aimed to look at differences between "spontaneous" and "instrument-associated" depressed skull fractures. STUDY DESIGN:This retrospective, case-control analysis included every neon...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.ajog.2004.06.035
更新日期:2005-01-01 00:00:00
abstract:OBJECTIVE:Our purpose was to compare patients' satisfaction with the effect of treatment, health-related quality of life, psychologic status, and sexual functioning 2 years after endometrial resection or vaginal hysterectomy for menorrhagia. STUDY DESIGN:Menorrhagic women < or = 50 years old with a mobile uterus small...
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(97)70445-9
更新日期:1997-07-01 00:00:00
abstract::Assisted reproductive technologies have aided thousands of couples, but complications have resulted in multifetal pregnancies creating a bitter irony for infertility patients. In an effort to increase the rate of intact survival, we have successfully performed transabdominal first-trimester selective termination proce...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(90)90922-t
更新日期:1990-06-01 00:00:00
abstract::Mid-trimester abortion was successfully induced in 70 of 71 patients by administration of vaginal PGE2 suppositories. The one patient who failed to abort with this method was pregnant in the blind horn of a duplex uterus. The mean abortion time for the successful inductions was 11.88 hours. Multiparous patients aborte...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(75)90353-1
更新日期:1975-08-15 00:00:00
abstract::There are conflicting data in the literature concerning the effects of oral contraceptives on platelet aggregation. We studied 26 healthy women who used oral contraceptives for at least three months. The control group consisted of 25 healthy women of childbearing age, who were receiving no medications. No differences ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(78)90897-9
更新日期:1978-10-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to estimate the outcomes of uterine embolization and hysterectomy for uterine leiomyomas. Study design This was a multicenter prospective study of patients who were treated with embolization (n=102 patients) and hysterectomy (n=50 patients) for leiomyomas. Changes in symptoms, co...
journal_title:American journal of obstetrics and gynecology
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1016/j.ajog.2004.03.037
更新日期:2004-07-01 00:00:00
abstract::A study of fetal activity was undertaken as the first step in a series of physiologic fetal movement studies. A simple, safe, noninvasive, clinically applicable method for studying fetal movement with a tocodynamometer is described. Four basic types of fetal movement have been seen and defined in terms of their durati...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(76)90467-1
更新日期:1976-09-01 00:00:00