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CONTEXT Clinical prediction of preterm delivery is largely ineffective, and the mechanism mediating progesterone (P) withdrawal and estrogen activation at the onset of human labor is unclear. OBJECTIVES Our objectives were to determine associations of rates of change of circulating maternal CRH in midpregnancy with preterm delivery, CRH with estriol (E3)(More)
Fifteen centers for orthopaedic treatment of the foot and ankle participated in a prospective randomized trial to compare several nonoperative treatments for proximal plantar fasciitis (heel pain syndrome). Included were 236 patients (160 women and 76 men) who were 16 years of age or older. Most reported duration of symptoms of 6 months or less. Patients(More)
Heme oxygenase (HO) catalyses the formation of endogenous carbon monoxide and bilirubin from heme. CO, a potent vasodilator, and bilirubin, an antioxidant may have local actions in the fetal-placental vasculature of the placenta. We sought evidence of expression of the two known isoforms of HO in normal human term placenta using reverse transcription(More)
In humans, the length of gestation and the onset of parturition have been linked to the exponential production of placental CRH and a late gestational decline in maternal plasma CRH-binding protein (CRH-BP). CRH has been shown to have direct effects on the myometrium and on the fetal adrenal, where it stimulates production of the estrogen precursor(More)
During human pregnancy, plasma CRH immunoreactivity (CRH-IR) rises progressively, peaking during labor and falling after delivery. Among animal species, only higher primates have elevated CRH-IR during pregnancy. This study examines whether changes in plasma CRH-IR in the baboon (Papio hamadryas) are similar to those in the human. CRH-IR was determined by(More)
In humans, placental corticotropin-releasing hormone (CRH) production has been linked to the determination of gestational length, and a late gestational fall in CRH-binding protein (CRH-BP) has been linked to the onset of parturition. Expression of placental CRH mRNA is limited to primates, and only in man has a circulating CRH-BP been described. As the(More)
Corticotropin-releasing hormone (CRH), a potent neuropeptide, is produced by the placenta of anthropoid primates. No other mammals, including prosimian primates, are known to produce placental CRH. In humans, placental CRH appears to play an important role in the progression of pregnancy to parturition. Maternal circulating CRH begins to rise early in(More)
Corticotrophin-releasing hormone (CRH) and arginine vasopressin (AVP) are two potent stimulators for secretion of proopiomelanocortin (POMC)-derived hormones, from corticotrophs. CRH also stimulates POMC synthesis. Atrial natriuretic peptide (ANP) has been reported to inhibit POMC peptide release and is thought to act through cGMP signalling pathways. A(More)
Corticotropin-releasing hormone (CRH) is an endogenous 41-amino acid peptide involved in a wide ranging series of systems including the brain, the coordination of the body's overall response to stress, and more recently as a crucial initiator in the onset of labor, also known as the placental clock. Although more physiological data on CRH is emerging(More)
BACKGROUND The maternal hypothalamic-pituitary-adrenal-axis (HPAA) undergoes dramatic activation during pregnancy. Increased cortisol and corticotrophin-releasing-hormone (CRH) associate with low birthweight and preterm labor. In non-pregnant obesity, the HPAA is activated but circulating cortisol levels are normal or lower than in lean women. We(More)