Abstract:
:Estrogen action is necessary for evidencing the stimulatory action of mifepristone and naloxone on prolactin (PRL) secretion during late pregnancy. Our aim is to determine the mechanism mediating this facilitator action of estrogens. To investigate the hypothalamic mechanisms involved in estrogen actions in PRL secretion at the end of pregnancy, we measured the effect of pretreatment with the estrogen antagonist tamoxifen on the expression of tyrosine hydroxylase (TH), hormone receptors (ERα and β, PRs, PRLR(long)), and μ- and κ- opioid receptors (ORs) at mRNA (by semiquantitative RT-PCR) and protein (by western blot for TH, PRLR(long), ERα, PRs, μ- and ORs) levels in extracts of medial basal hypothalamus (MBH) and serum PRL, E2 and P4 levels (by RIA) in mifepristone- and naloxone-treated rats. Tamoxifen administration partially prevented PRL release induced by the combined treatment. TH expression diminished and ERα expression increased in mifepristone-treated rats at mRNA and protein levels and tamoxifen partially prevented these changes with no effect on PRs expression. Mifepristone increased PRLR(long) mRNA levels; this increase was blocked by tamoxifen. Combined tamoxifen and mifepristone treatment decreased μ- and k-ORs mRNA but not protein levels. In conclusion, E2 induces neuroadaptive mechanisms necessary to facilitate PRL release preceding delivery. Acting through ERα, E2 modulates hypothalamic dopaminergic neurons activity, regulating TH, μ- and κ-ORs and PRLR(long) expression, and is necessary for evidencing the effects of P4 withdrawal. Its presence on days 14 and 15 of pregnancy is crucial to facilitate the opioid system modulation of PRL secretion at the end of pregnancy in the rat.
journal_name
Neurochem Resjournal_title
Neurochemical researchauthors
Villegas-Gabutti C,Pennacchio GE,Jahn GA,Soaje Mdoi
10.1007/s11064-016-2067-xsubject
Has Abstractpub_date
2016-12-01 00:00:00pages
3344-3355issue
12eissn
0364-3190issn
1573-6903pii
10.1007/s11064-016-2067-xjournal_volume
41pub_type
杂志文章abstract::Cysteinyl leukotrienes (CysLTs) are potent pro-inflammatory and immune modulating lipid mediators involved in inflammatory diseases and were boosted in human brain after acute phase of cerebral ischemia. The antagonism of CysLTs receptors may offer protection against ischemic damage. Therefore it seemed interesting to...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-014-1478-9
更新日期:2015-01-01 00:00:00
abstract::Gangliosides, the acidic glycosphingolipids (GSLs) containing N-acetylgalactosamine and sialic acid are ubiquitous in the central nervous system. At least six DSL-glycosyltransferase activities (GLTs Gangliosides, the acidic glycosphingolipids (GSLs) containing N-acetylgalactosamine and sialic acid (or NAc-Neuraminic ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-012-0762-9
更新日期:2012-06-01 00:00:00
abstract::The frontal cortex, hippocampus, and cerebellum of the Fischer 344 rat were examined for an age-dependent change in neuronal and non-neuronal binding. Clonazepam and Ro5-6669 displaceable [3H]diazepam binding were used as indicators of [3H]diazepam binding on neuronal and non-neuronal membranes, respectively. In both ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00964927
更新日期:1983-09-01 00:00:00
abstract::The axonal transport of tRNA has been investigated in the chick optic system. Chicks were injected with [3H]uridine intraocularly or intracranially and the RNA of the retina, nerve complex, and tecta separated by polyacrylamide gel electrophoresis and then counted. The ratio of tRNA to rRNA specific activities increas...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00966323
更新日期:1978-08-01 00:00:00
abstract::Several studies showed that the up-regulation of glial glutamate transporter-1 (GLT-1) participates in the acquisition of brain ischemic tolerance induced by cerebral ischemic preconditioning or ceftriaxone pretreatment in rats. To explore whether GLT-1 plays a role in the acquisition of brain ischemic tolerance induc...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-011-0639-3
更新日期:2012-03-01 00:00:00
abstract::Sex differences exist in the functioning of the two brain corticosteroid receptor systems. Ovarian steroid replacement alters receptor mRNA expression, receptor binding capacities, and receptor affinity. The abundance of both mineralocorticoid receptor (MR) and glucocorticoid receptor (GR) message can be reduced by es...
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1023/a:1022023207326
更新日期:1997-11-01 00:00:00
abstract::In this report data are summarized on changes in the quantity of proteolipid protein (PLP), its amino acid composition, and the lipid moiety of these lipid-protein complexes in rat brain during postnatal development. In all three parts of the central nervous system (CNS) studied (cerebral hemispheres, medulla oblongat...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:
更新日期:1985-11-01 00:00:00
abstract::Cortical spreading depression (CSD) enhances ischemic tolerance to temporary focal ischemia. Although this effect most likely requires the expression or activation of neuroprotective factors, their identity remains relatively unknown. One important factor involved in neuroprotection is adenosine monophosphate-dependen...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-014-1447-3
更新日期:2014-12-01 00:00:00
abstract::We examined the role of hippocampal metabotropic glutamate receptor 5 (mGlu5) in spatial learning and memory. Although it has been shown that mGlu5 signalling is required for certain forms of learning and memory, its role in spatial learning is unclear since studies using pharmacological or knockout mice models provid...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-015-1595-0
更新日期:2015-06-01 00:00:00
abstract::The first mentioning of the word "receptor" for the structure with which a bioactive compound should react for obtaining its specific influence on a physiological system goes back to the years around 1900. The receptor concept was adapted from the lock and key theory for the enzyme substrate and blockers interactions....
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1007/s11064-014-1398-8
更新日期:2014-10-01 00:00:00
abstract::We have investigated gene expression changes produced by acute and chronic daily treatment with a prototypical antidepressant, imipramine, using DNA microarrays. The analysis of similarities in gene expression patterns among functionally related genes revealed four expression profile cluster areas that showed a highly...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/b:nere.0000023610.89631.d6
更新日期:2004-06-01 00:00:00
abstract::Chronic acrylamide (ACR) exposure induces peripheral-central axonopathy in occupational workers and laboratory animals, but the underlying mechanisms remain unclear. In this study, we first investigated the effects of ACR on slow axonal transport of neurofilaments in cultured rat dorsal root ganglia (DRG) neurons thro...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-015-1782-z
更新日期:2016-05-01 00:00:00
abstract::In this communication, the effect of acute treatment with lamotrigine (LTG) was investigated on release of main excitatory amino acids (EAA) such as glutamate (Glu) and aspartate (Asp) in the hippocampus of pentylenetetrazol (PTZ)-induced and PTZ-kindled freely moving rats using micro dialysis. The results show that, ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-012-0942-7
更新日期:2013-03-01 00:00:00
abstract::Mice with a heterozygous knock-out of the myelin protein P0 gene (P0+/-) develop a neuropathy similar to human Charcot-Marie-Tooth disease. They are indistinguishable from wild-types (WT) at birth and develop a slowly progressing demyelinating neuropathy. The aim of this study was to investigate whether the regenerati...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-013-1030-3
更新日期:2013-06-01 00:00:00
abstract::Status epilepticus is a common manifestation of nerve agent toxicity and represents a serious medical emergency with high rates of mortality and neurologic injury in those that survive. The aim of the current study was to determine if targeting oxidative stress with the catalytic antioxidant, AEOL10150, would reduce p...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-017-2273-1
更新日期:2017-07-01 00:00:00
abstract::The effects of palmitate on intracellular and extracellular amino acid concentrations of cultured astrocytes was studied. Exposure of astrocytes to either 0.72 mM or 0.36 mM palmitate was associated with a significant reduction in the intracellular pool of glutamine and taurine. In contrast, the intracellular concentr...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF01000040
更新日期:1989-04-01 00:00:00
abstract::Populations of enriched glial precursor cells and astrocytes isolated from primary cultures of newborn rat brain were used to study the synthesis of sulfated glycoproteins. Both cell types incorporated [3H]glucosamine and [35S]sulfate into carbohydrate side chains of proteoglycans and glycoproteins. The rate of incorp...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00965947
更新日期:1986-08-01 00:00:00
abstract::As is known to all, neuroinflammation plays a vital role in early brain injury pathogenesis following subarachnoid hemorrhage (SAH). It has been shown that rutin have a property of inhibiting inflammation in many kinds of animal models. However, the effect of rutin on neuroinflammation after SAH remains uninvestigated...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-016-1863-7
更新日期:2016-06-01 00:00:00
abstract::An analytical method for the determination of saturated very long chain (VLC) fatty acids in the serum has been devised. Free fatty acids obtained after hydrolysis of total lipid extracts were converted into p-bromophenacyl esters. The derivatives were purified in two sequential steps by clean-up on C18 reversed-phase...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00968082
更新日期:1984-12-01 00:00:00
abstract::Ciliary neurotrophic factor (CNTF) is a promyelinating trophic factor that plays an important role in multiple sclerosis (MS). However, mechanisms by which CNTF expression could be increased in the brain are poorly understood. Recently we have discovered anti-inflammatory and immunomodulatory activities of sodium benz...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-015-1723-x
更新日期:2015-11-01 00:00:00
abstract::This work evaluated the in vitro effect of thiazolidin-4-ones on the activity of AChE (total and isoforms) isolated from the cerebral cortex, hippocampus, and lymphocytes. Kinetic parameters were evaluated and molecular docking was performed. Our results showed that thiazolidinones derived from 4-(methylthio)benzaldeh...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-019-02929-8
更新日期:2020-02-01 00:00:00
abstract::Zonisamide (ZNS), an antiepileptic drug having beneficial effects also against Parkinson's disease symptoms, has proven to display an antioxidant effects in different experimental models. In the present study, the effects of ZNS on rotenone-induced cell injury were investigated in human neuroblastoma SH-SY5Y cells dif...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-013-1181-2
更新日期:2013-12-01 00:00:00
abstract::The features of neuronal damage induced by the mitochondrial toxin NaN(3) were investigated in rat primary cortical neuron cultures. Cell viability (MTT colorimetric determination) and transmembrane mitochondrial potential (J-C1 fluorescence) were concentration-dependently reduced 24 h after NaN(3); neither nuclear fr...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-008-9852-0
更新日期:2009-05-01 00:00:00
abstract::N-Methyl-D-aspartate (NMDA) and L-glutamate activate membrane receptors that produce substantial permeation of Na+, K+ and Ca2+ through the neuronal membrane. These ionic fluxes are intimately linked to processes that regulate neuronal survival, growth and differentiation. Intracellular free Ca2+ concentrations are th...
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1007/BF00966862
更新日期:1992-01-01 00:00:00
abstract::The kinetics of the uptake of p-tyramine, m-tyramine, and dopamine were investigated in slices of the hypothalamus and striatum of the rat in the presence of nialamide. When uptake was analyzed by a least-squares fit to a Lineweaver-Burk plot, each amine appeared to be concentrated by both a "low"-affinity and a "high...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00964440
更新日期:1979-10-01 00:00:00
abstract::Mitochondrially bound brain hexokinase is solubilized by anesthetics and this effect has been suggested to contribute to anesthesia. In the present investigation the influence of the metabolic inhibitor 2-deoxy-D-glucose (2-DOG) was studied. An isolated rat brain preparation was used to avoid the contribution of perip...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00965526
更新日期:1982-06-01 00:00:00
abstract::Metal ions are often used to block calcium channels in various tissues, including synaptosomes. In the present study, Fura-2 was used to determine the effectiveness of various metal ions as calcium channel blockers in rat brain synaptosomes in vitro. In buffer solutions, La3+ and Cd2+ increased the Fura-2 fluorescence...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00965611
更新日期:1989-11-01 00:00:00
abstract::Astrocytes transport the monocarboxylate acetate, but synaptosomes do not. The reason for this is unknown, because both preparations express monocarboxylate transporters (MCT). The transport and metabolism of lactate, another monocarboxylate, was examined in these two preparations, and the results were compared to tho...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/b:nere.0000010450.21586.a6
更新日期:2004-01-01 00:00:00
abstract::The objective of the present study was to investigate the effects of preincubation of hippocampus homogenates in the presence of homocysteine or methionine on Na+, K+-ATPase and Mg2+-ATPase activities in synaptic membranes of rats. Homocysteine significantly inhibited Na+, K+-ATPase activity, whereas methionine had no...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1013907104585
更新日期:2001-11-01 00:00:00
abstract::Rats fed a vitamin E-deficient diet for 7--8 weeks postweaning showed no change in brain weight or the activity in brain of various enzymes involved in neurotransmitter synthesis and metabolism. Body and muscle weights were markedly reduced. Muscle choline acetyltransferase and acetylcholinesterase activities were sig...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00966003
更新日期:1978-12-01 00:00:00