Abstract:
:Transient global ischemia induces selective, delayed neuronal death of pyramidal neurons in the hippocampal CA1. Whereas long term treatment of middle-aged female rats with estradiol at physiological doses ameliorates neuronal death, the signaling pathways that mediate the neuroprotection are, as yet, unknown. Protein kinase B (Akt) and downstream transcription factors, the cAMP response element binding protein (CREB) and signal transducer and activator of transcription (STAT3) are critical players in cellular survival following injury. The present study was undertaken to determine whether long term estradiol alters the phosphorylation status and activity of Akt, STAT3 and CREB in ovariohysterectomized, middle-aged and young female rats subjected to global ischemia. Irrespective of either hormone or ischemic condition, middle-aged females exhibited lower levels of p-CREB and higher levels of Akt and STAT3 in CA1 than young females, as assessed by Western blot. In middle-aged animals, ischemia increased the phosphorylation status/activity of Akt and STAT3, and decreased the phosphorylation status/activity of CREB in the hippocampal CA1. Whereas estradiol did not detectably alter the phosphorylation status/activity of Akt or STAT3, it prevented the ischemia-induced decrease in nuclear p-CREB. Similar results were observed for the young females. Collectively, these data demonstrate that CREB, STAT3, and Akt are involved in the molecular response to global ischemia and that age influences the status of CREB, STAT3 and Akt activity in CA1 under physiological as well as pathological conditions, further emphasizing the importance of including older rodents in neuroprotection studies.
journal_name
Brain Resjournal_title
Brain researchauthors
De Butte-Smith M,Zukin RS,Etgen AMdoi
10.1016/j.brainres.2012.06.036subject
Has Abstractpub_date
2012-08-30 00:00:00pages
118-28eissn
0006-8993issn
1872-6240pii
S0006-8993(12)01111-0journal_volume
1471pub_type
杂志文章相关文献
BRAIN RESEARCH文献大全abstract::The dorsal vagal complex of the medulla oblongata is a key centre involved in the regulation of numerous autonomic functions, including cardiovascular control. Adenosine has been implicated as a potential neuromodulator of the baroreceptor reflex, and therefore the current study has investigated the presence and chara...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(94)90327-1
更新日期:1994-07-25 00:00:00
abstract::The activity of single dopaminergic (DA) neurons (total n = 77) in the midbrain of awake, unrestrained rats was examined. The firing rates and patterns of ventral tegmental area (A10) cells (n = 39) were similar to those of identified DA neurons in anesthetized and paralyzed rats. Unit activity was briefly stimulated ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(87)90988-7
更新日期:1987-03-03 00:00:00
abstract::Many AIDS patients suffer from cognitive impairments including deficits in learning and memory. The Human Immunodeficiency Virus-1 (HIV-1) envelope glycoprotein gp120 is one possible mediator of these impairments. This is because gp120 activates brain microglial cells and astrocytes, and in vivo activation of glia lea...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(99)02445-2
更新日期:2000-04-07 00:00:00
abstract::Some kinds of nociception appear to be partially mediated by the release of substance P (SP) in the spinal cord dorsal horn from terminals of primary afferent nociceptors. Only some nociceptors contain and release SP however. Specifically, SP appears to be released by unmyelinated (C) nociceptive afferents when activa...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(96)01466-7
更新日期:1997-03-28 00:00:00
abstract::Previous research with deafferented subjects suggests that efference copy can be used to update limb position. However, the contributions of efference copy to limb localization are currently unclear. We examined the performance of JDY, a woman with severe, longstanding proprioceptive deficits from a sensory peripheral...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2010.07.063
更新日期:2010-10-08 00:00:00
abstract::Ca2+-permeable AMPA receptors (AMPAR) which crucially modify maturational programs of the developing brain are involved in seizure-induced glutamate excitotoxicity and apoptosis. Regulatory effects on AMPAR subunit composition and RNA-editing in the developing brain and their significance as therapeutic targets are no...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2020.146760
更新日期:2020-05-15 00:00:00
abstract::A major mesolimbic projection towards the hippocampal formation (HF) has been extensively described, but no clear evidence of its dopaminergic content has been demonstrated. In order to evaluate the percentage of dopaminergic (DA) cells of ventral tegmental area (VTA-A10) and adjacent substantia nigra (SN-A9) projecti...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(94)90512-6
更新日期:1994-12-30 00:00:00
abstract::Electrophysiological studies suggest that an increase in excitatory amino acid release may occur in the locus coeruleus during opiate withdrawal. The present study examined directly by microdialysis in anesthetized rats the effect of naltrexone-precipitated opiate withdrawal on the efflux of excitatory amino acids in ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(94)90186-4
更新日期:1994-02-04 00:00:00
abstract::Focal electrical stimulation and glutamate microinjection in the nuclei reticularis gigantocellularis (NGC) and gigantocellularis pars alpha (NGC alpha) both inhibit the nociceptive tail-flick (TF) reflex in rats. The present experiments were undertaken to determine the transmitter(s) at the level of the lumbar spinal...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(90)91825-2
更新日期:1990-12-03 00:00:00
abstract::Focal axonal swellings are characteristic of a wide range of neuropathies. Three neuron-specific monoclonal antibodies have been used to identify focal axonal swellings in the normal developing rat cerebellar cortex. Between 7 and 15 days postnatal, swellings are a common feature of the granular layer and white matter...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(86)91018-8
更新日期:1986-01-22 00:00:00
abstract::Neurons from many brainstem nuclei involved in respiratory control increase their firing rate in response to acidosis in vitro, suggesting that they are central chemoreceptors. This property has been considered to be either unique to neurons involved in respiratory control, or at least very unusual for non-respiratory...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(00)02033-3
更新日期:2000-03-31 00:00:00
abstract::More than 50% of the Xenopus pectoralis twitch muscle fibers with two distant endplates are innervated at both sites by the same neuron. This study indicates that there are three separable twitch motor unit types in this muscle which show very little overlap in innervation. This study also shows that each motor unit i...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(85)90697-3
更新日期:1985-03-25 00:00:00
abstract::We have characterized the effects of retinoic acid (RA) on the growth, morphology and biosynthesis of cytoskeletal proteins in NB2a mouse neuroblastoma cells. In addition, the morphological and biochemical changes were compared to those induced by dibutyryl cyclic AMP (db cAMP). Growth inhibition by RA was concentrati...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0165-3806(85)90220-2
更新日期:1985-08-01 00:00:00
abstract::The present study reveals developmental changes in the number, the phenotype and the distribution pattern of mast cells (MCs) along the cervical, the thoracic and the lumbar parts of the spinal dura mater. Postnatal infiltration of spinal dura by MCs does not appear to follow a sequential developmental pattern and men...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2008.05.057
更新日期:2008-08-21 00:00:00
abstract::Strychnine-sensitive, inhibitory glycine receptors have not until lately been considered to play a significant role in neurotransmission in mammalian forebrain regions. In order to investigate the role of glycine as a neurotransmitter in brain we have measured glycine induced chloride fluxes in different adult rat for...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(95)01484-5
更新日期:1996-03-11 00:00:00
abstract::The effect of the non-competitive N-methyl-D-aspartate antagonist MK-801 on the early development of kindling-induced potentiation was examined in the rabbit hippocampal dentate gyrus. MK-801 (0.5 mg/kg) was administered 2 h before each daily kindling stimulation was applied to the perforant path. This treatment conti...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(91)91182-z
更新日期:1991-10-18 00:00:00
abstract::K+ and Cl- transport using 42K+ and 36Cl- was studied in primary astrocyte cultures prepared from neonatal rat brains. A component of 42K+ uptake was sensitive to both furosemide and bumetanide with maximum inhibition being obtained at 1 and 0.01 mM concentrations of the inhibitors, respectively. Furosemide and bumeta...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(85)91282-x
更新日期:1985-12-30 00:00:00
abstract::The pedunculopontine nucleus (PPN) located in the mesopontine tegmentum is innervated by descending projections from nuclei in the basal ganglia. The present study was performed to determine whether nigrostriatal dopaminergic neuron degeneration is associated with changes in PPN metabolic activity. Unilateral nigrostr...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(99)01268-8
更新日期:1999-05-15 00:00:00
abstract::The climbing fiber input to the cerebellar cortex was destroyed using both electrolytic and chemical (3-acetylpyridine) lesions. The long-term effects of climbing fiber deafferentation on the ansiform lobule of weanling and adult rats were examined at both the light and electron microscopic levels. Image analysis of G...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(86)90022-3
更新日期:1986-09-24 00:00:00
abstract::A potential mechanism for valproate (VPA)-induced increases in glial cell-substratum adhesivity has been demonstrated. Metabolically labelled glioma (C6) and primary astrocytes showed a statistically significant accumulation of protein when cultured in the presence of therapeutic concentrations of VPA (1 mM). This was...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(88)90292-2
更新日期:1988-08-30 00:00:00
abstract::The present experiments were designed to assess whether brain hypothermia can reduce the behavioral and histopathological deficits associated with global forebrain ischemia. Animals were subjected to 12.5 min of four vessel occlusion (4VO) with moderate hypotension, and brain temperature maintained at either 37 degree...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(92)90945-6
更新日期:1992-05-15 00:00:00
abstract::The central nucleus of the amygdala (CEA) is selectively involved in the passive component of the behavioral (immobility) and the accompanying parasympathetic response during conditioned, stressful environmental challenges. Vasopressinergic mechanisms in the brain seem to play a role in these stress responses. The eff...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(92)91529-n
更新日期:1992-11-20 00:00:00
abstract::Exercise has been shown to influence learning and memory. Most studies were performed with a voluntary running paradigm (e.g. running wheel) in mice. However, such effects of exercise on learning and memory are less well demonstrated using a forced running paradigm (e.g. treadmill). The present study was designed to e...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2006.07.023
更新日期:2006-10-03 00:00:00
abstract::To evaluate roles of the sympathetic nervous system in enhancing glucose uptake in skeletal muscles in response to electrical stimulation of the ventromedial hypothalamic nucleus (VMH), the effects of guanethidine treatment and adrenal demedullation on the response were examined in rats anesthetized and injected with ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(94)91085-5
更新日期:1994-06-27 00:00:00
abstract::Amyloid β-protein (Aβ) is the major component of extracellular plaques in the brains of patients with Alzheimer's disease. It has been suggested that the interaction of Aβ with membrane cholesterol is essential for Aβ to exert neurotoxicity; however, the effect of phospholipids, another major membrane lipid component,...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2016.04.035
更新日期:2016-07-01 00:00:00
abstract::A recent physiological report suggested that neurotensin could inhibit the vasopressin releasing from vasopressin-producing neurons in the hypothalamic paraventricular nucleus but not in the supraoptic nucleus. In the present study, the synaptic relationship between the neurotensin-like immunoreactive and vasopressin-...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(99)01455-9
更新日期:1999-07-10 00:00:00
abstract::Rats with electrodes in either the posterior medial forebrain bundle (MFB), the anterior MFB, the medial prefrontal cortex, or the locus coeruleus self-stimulated during a 45 min period following the injection of [14C]2-deoxyglucose. They were then sacrificed and their brains prepared for autoradiography. The autoradi...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(83)91307-0
更新日期:1983-04-25 00:00:00
abstract::In the present study, we describe the cardiovascular effects of local acetylcholine (Ach) microinjection into both the ventrolateral (vlPAG) and dorsal (dPAG) periaqueductal gray areas of anesthetized rats and the possible local receptors involved with these responses. Microinjection of Ach (9, 27, 45 or 81 nmol/50 nL...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2010.11.051
更新日期:2011-01-31 00:00:00
abstract::Calcium currents were studied in morphologically identified pyramidal and stellate neurons acutely isolated from layer II/III of rat entorhinal cortex, using the whole-cell patch-clamp configuration. The peak amplitude of high-voltage activated current (HVA) measured at +10 mV was not different in both neuron populati...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(98)01234-7
更新日期:1999-01-23 00:00:00
abstract::The local cerebral circulatory and metabolic effects of MK-801, a selective non-competitive N-methyl-D-aspartate receptor antagonist have been examined in conscious rats with quantitative autoradiographic techniques using [14C]iodoantipyrine and [14C]2-deoxyglucose as tracers. Local cerebral blood flow (CBF) and local...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(90)90172-8
更新日期:1990-03-19 00:00:00