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progesterone/hypoxie
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Effects of progesterone on the neonatal brain following hypoxia-ischemia.
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Progesterone displays a strong potential for the treatment of neonatal hypoxic-ischemic encephalopathy since it has been shown to be beneficial in the treatment of the central nervous system injuries in adult animals. Here, we evaluated the effects of the administration of progesterone (10 mg/kg) in
Hypoxia-inducible factor 1 mediates hypoxia-enhanced synthesis of progesterone during luteinization of granulosa cells.
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Hypoxia has been suggested to enhance progesterone (P4) synthesis in luteinizing granulosa cells (GCs), but the mechanism is unclear. The present study was designed to test the hypothesis that the hypoxia-induced increase in P4 synthesis during luteinization in bovine GCs is mediated by
Long-Lasting Actions of Progesterone Protect the Neonatal Brain Following Hypoxia-Ischemia.
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Neonatal hypoxia-ischemia (HI) is the leading cause of mortality and morbidity in newborns, occurring in approximately 2% of live births. Neuroprotective actions of progesterone (PROG) have already been described in animal models of brain lesions. However, PROG actions on neonates are still
The Expression of Decidual Protein Induced by Progesterone (DEPP) is Controlled by Three Distal Consensus Hypoxia Responsive Element (HRE) in Hypoxic Retinal Epithelial Cells.
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Hypoxia affects the development and/or progression of several retinopathies. Decidual protein induced by progesterone (DEPP) has been identified as a hypoxia-responsive gene that may be part of cellular pathways such as autophagy and connected to retinal diseases. To increase our
Advancement of reproductive senescence and changes in the early expression of estrogen, progesterone and micro-opioid receptors induced by neonatal hypoxia in the female rat.
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Perinatal hypoxia is a frequent birth complication, and although its early consequences on brain development have been well studied, few studies address any long-term effects. Postnatal insults producing small disturbances in endocrine function can have marked and long-lasting effects. In the
Hypoxia promotes progesterone synthesis during luteinization in bovine granulosa cells.
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To determine whether hypoxia has an effect on luteinization, we examined the influence of hypoxia on a model of bovine luteinizing and non-luteinizing granulosa cell culture. The granulosa cells were obtained from small antral follicles (≤ 6 mm in diameter). To induce luteinization, the cells were
Effects of progesterone on hypoxia-induced inhibition of excitatory synaptic transmission in the rat nucleus tractus solitarius.
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The present study evaluated the ability of progesterone to alleviate the synaptic transmission disturbed by hypoxia in the nucleus tractus solitarius (NTS). Hypoxia with N2 inhibited spontaneous and tractus solitarius-evoked excitatory postsynaptic currents (sEPSCs and eEPSCs) in NTS
Effect of progesterone on respiratory response to moderate hypoxia and apnea frequency in developing rats.
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We used whole-body plethysmography and pulse oximetry to assess the effects of acute administration of progesterone (4 mg/kg, i.p.) on normoxic ventilation, hypoxic ventilatory response (HVR: FiO(2)=12% over 20 min), metabolism, and apnea frequency in rats on postnatal (P) days P1, P4, P7, and P12.
An Overview on the Respiratory Stimulant Effects of Caffeine and Progesterone on Response to Hypoxia and Apnea Frequency in Developing Rats.
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The respiratory stimulant caffeine is the most frequently used xanthine (theophylline or aminophylline) for the treatment of apnea in premature infants. It decreases but does not eliminate apnea. In most cases such decreases is insufficient to prevent the use of artificial ventilation. Progesterone
Progesterone reverses the neuronal responses to hypoxia in rat nucleus tractus solitarius in vitro.
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The nucleus tractus solitarius (NTS) is a relay nucleus that integrates peripheral chemoreceptor input in response to hypoxia and hence influences the generation of respiratory rhythm. Several studies have shown that administration of progesterone stimulates ventilatory responses to hypoxia. There
Alterations of estrous cycle, 3β hydroxysteroid dehydrogenase activity and progesterone synthesis in female rats after exposure to hypobaric hypoxia.
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The underlying mechanism regulating hypoxia induced alteration in female steroid hormones is first time explored in this study. To understand the mechanistic approach, female Sprague- Dawley rats were exposed to acute and chronic hypobaric hypoxia (282 mm-Hg, ~7620 m, 6 hours, 3 and 7 days). Estrous
Hypoxia-induced gene expression of aquaporin-4, cyclooxygenase-2 and hypoxia-inducible factor 1α in rat cortical astroglia is inhibited by 17β-estradiol and progesterone.
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17β-Estradiol (E2) and progesterone (P) are neuroprotective in acute brain injury by attenuating neuropathophysiological processes and regulating local glial function. Besides controlling brain-intrinsic immune responses, astrocytes are cellular targets for sex steroids in health and disease and
Effect of hypoxia on progesterone production by cultured bovine early and mid luteal cells.
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A major role of the corpus luteum (CL) is to produce progesterone (P4). The CL has immature vasculature shortly after ovulation, suggesting it exists under hypoxic conditions. To elucidate the mechanism involved in regulation of luteal cell function during CL development, we compared the effect of
Progesterone and interferon tau regulate hypoxia-inducible factors in the endometrium of the ovine uterus.
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In ruminants, progesterone (P4) from the ovary and interferon tau (IFNT) from the elongating blastocyst regulate expression of genes in the endometrium that are hypothesized to be important for uterine receptivity and blastocyst development. These studies determined effects of the estrous cycle,
Benefits of progesterone on brain immaturity and white matter injury induced by chronic hypoxia in neonatal rats
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Objectives: This study aims to evaluate the protective effects of progesterone on white matter injury and brain immaturity in neonatal rats with chronic hypoxia.
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