Abstract:
:1. We studied the effect of isolation stress in 3- and 12-month-old rats individually housed in metabolic cages for 7 days. Urine (24 hr) was collected daily from one group of animals of each age. The other group was tested in an open field and on a hot plate on days 1 and 7. 2. Total deambulation in the open-field test was lower in young than in older rats both on day 1 (54.7 +/- 9.9 vs 80 +/- 8.9 crossings/session; P < 0.04) and on day 7 (21 +/- 9 vs 48 +/- 7 crossings per session; P < 0.04) and decreased significantly in the two groups when tested on day 7 (P < 0.03). Latency to paw-licking in the hot-plate test was longer in young than in older animals on day 1 (14 +/- 2 vs 8 +/- 4 sec; P < 0.05) but was similar in the two groups on day 7. 3. Urinary excretions of norepinephrine (NE) and epinephrine (E) were determined by HPLC with electrochemical detection. Urinary NE in day 1 was similar in young and older animals (2627 +/- 828 vs 3069 +/- 598 ng/24 hr). In young animals NE excretion decreased along the study and was significantly (P < 0.02) lower than on day 1 during the last 3 days of the study. Conversely, in older animals urinary excretion of NE remained similar throughout the study. On day 7 urinary excretion of NE in older animals was about two fold that in young rats. Urinary E was similar in young and older rats (341 +/- 127 vs 532 +/- 256 ng/24 hr) on day 1 and showed a tendency to increase throughout the study. 4. Urinary monoamine oxidase inhibitory (IMAO) activity was determined by testing the ability of urine extracts to inhibit rat liver MAO activity in vitro and was higher in young than in older animals throughout the study (day 1, 54.8 +/- 4.2 vs 25.1 +/- 5.1%; P < 0.02). In young rats excretion of IMAO was significantly higher during the last 3 days of the study than on day 1 (P < 0.05). In older animals urinary IMAO showed a tendency to increase at the end of the study. 5. Isolation stress caused by housing rats in metabolic cages results in different behavioral and metabolic responses in young and older animals. Young animals exhibit a lower locomotor and analgesic response and excrete lower amounts of NE and higher IMAO activity in the urine than older rats. The metabolic and behavioral responses to isolation stress are highly dependent on the age of the animals tested. These results should be taken into consideration when designing experiments requiring the use of metabolic cages.
journal_name
Cell Mol Neurobioljournal_title
Cellular and molecular neurobiologyauthors
Gil MC,Aguirre JA,Lemoine AP,Segura ET,Barontini M,Armando Idoi
10.1023/a:1006984402291subject
Has Abstractpub_date
1999-10-01 00:00:00pages
625-33issue
5eissn
0272-4340issn
1573-6830journal_volume
19pub_type
杂志文章abstract::Working memory (WM) is a highly heritable cognitive trait that is involved in many higher-level cognitive functions. In the past few years, much evidence has indicated that the reduction of dopamine activity in human brain can impair the WM system of the neuropsychiatric disorders. In this study, we hypothesized that ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-012-9817-3
更新日期:2012-08-01 00:00:00
abstract::Chromogranin A (CgA) is a soluble glycoprotein stored along with hormones and neuropeptides in secretory granules of endocrine cells. In the last four decades, intense efforts have been concentrated to characterize the structure and the biological function of CgA. Besides, CgA has been widely used as a diagnostic mark...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
doi:10.1007/s10571-010-9595-8
更新日期:2010-11-01 00:00:00
abstract::The degenerating muscle (dmu) mouse harbors a loss-of-function mutation in the Scn8a gene, which encodes the alpha subunit of the voltage-gated sodium channel (VGSC) Na(V)1.6. The distribution of c-Fos and c-Jun was examined in spinal and cranial motoneurons of the dmu mouse. In the cervical spinal cord, trigeminal mo...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-010-9498-8
更新日期:2010-07-01 00:00:00
abstract::1. We measured changes in resting membrane potential (Em) and Na-K pump activity, assayed by ouabain-sensitive 86Rb uptake, in response to carbamylcholine (CCh) and its continued presence in single rat skeletal myotubes in culture. 2. CCh caused immediate depolarization from control Em (-80 to -85 mV) to near 0 follow...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/BF00711225
更新日期:1988-12-01 00:00:00
abstract::1. Gonadotropin-releasing hormone (GnRH) was originally isolated as a hypothalamic peptide hormone that regulates the reproductive system by stimulating the release of gonadotropins from the anterior pituitary. However, during evolution the peptide was subject to gene duplication and structural changes, and multiple m...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
doi:10.1007/BF02069556
更新日期:1995-02-01 00:00:00
abstract::D-serine is synthesized by serine racemase (SR) and is a co-agonist at forebrain N-methyl-D-aspartate receptors (NMDARs). D-serine and SR are expressed primarily in neurons, but not in quiescent astrocytes. In this study, we examined the localization of D-serine and SR in the mouse striatum and the effects of genetica...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-020-00880-9
更新日期:2020-05-22 00:00:00
abstract::1. The central nervous systems (CNS) of males and females differ in the control mechanisms for the release of gonadotropins from the anterior pituitary gland as well as the capacity to display sex specific behaviors. 2. In guinea pigs and monkeys, these differences are organized through the actions of prenatal androge...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
doi:10.1023/a:1022534019718
更新日期:1997-12-01 00:00:00
abstract::Naked2 (NKD2), one member of Naked family, has been shown to negatively regulate Wnt/β-catenin signaling pathway. It has been recognized that NKD2 plays a vital role in cell homeostasis and prevention of tumorigenesis. However, NKD2 expression and its functional role in the brain in neuroinflammatory processes remain ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-015-0219-1
更新日期:2016-01-01 00:00:00
abstract::1. Wobbler mice suffer an autosomal recessive mutation producing severe motoneuron degeneration and dense astrogliosis, with increased levels of glial fibrillary acidic protein (GFAP) in the spinal cord and brain stem. They have been considered animal models of amyotrophic lateral sclerosis and infantile spinal muscul...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/BF02578387
更新日期:1996-02-01 00:00:00
abstract::Modulation of enzyme activity through nitrosylation has recently been identified as a new physiological activity of nitric oxide (NO). We hypothesized that NO enhances the TNF-α-induced death of retinal neurons through a suppression of nuclear factor-κB (NF-κB) by nitrosylation. In this study, cells from the RGC-5 lin...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-011-9739-5
更新日期:2012-01-01 00:00:00
abstract::We provide a comprehensive review of the available evidence on the pathophysiological implications of genetic variants in the human trace amine-associated receptor (TAAR) superfamily. Genes coding for trace amine-associated receptors (taars) represent a multigene family of G-protein-coupled receptors, clustered to a s...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
doi:10.1007/s10571-019-00743-y
更新日期:2020-03-01 00:00:00
abstract::1. The electrophysiological actions of excitatory amino acids and serotonin were investigated in slices from cat neocortex in vitro. Intracellular recordings were obtained from neurons (mainly in layer V) and the drugs applied extracellularly to the same neurons by microiontophoresis. 2. Serotonin, and to some extent ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/BF00733789
更新日期:1987-12-01 00:00:00
abstract::Mental retardation, which occurs in phenylketonuric patients, is associated with increased levels of phenylalanine, increased oxidative stress, and an imbalance of amino acids in the brain. Recent studies have shown that oxidative stress plays a role in the pathogenesis of phenylketonuria. In this work, we aimed to co...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-017-0573-2
更新日期:2018-07-01 00:00:00
abstract::1. The visual transduction system of the vertebrate retina is a well-studied model for biochemical and molecular studies of signal transduction. The structure and function of rhodopsin, a prototypical G protein-coupled receptor, and transducin or Gt, the photoreceptor G protein, have been particularly well studied. Me...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
doi:10.1007/BF00741446
更新日期:1991-12-01 00:00:00
abstract::Human mesenchymal stem cells (MSCs) are considered a promising tool for cell-based therapies of nervous system diseases. Bone marrow (BM) has been the traditional source of MSCs (BM-MSCs). However, there are some limitations for their clinical use, such as the decline in cell number and differentiation potential with ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-013-9922-y
更新日期:2013-05-01 00:00:00
abstract::Chromogranin A (CHGA) plays a fundamental role in the biogenesis of catecholamine secretory granules. Changes in storage and release of CHGA in clinical and experimental hypertension prompted us to study whether genetic variation at the CHGA locus might contribute to alterations in autonomic function, and hence hypert...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-010-9600-2
更新日期:2010-11-01 00:00:00
abstract::1. Several weeks after administration of 5,7-dihydroxytryptamine (5,7-DHT) to Aplysia, a dark pigmentation appears in serotonin-containing neurons, and this pigmentation allows visual identification of serotonergic neurons but does not appear to alter their physiology. 2. We have determined the distribution of labeled...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/BF00734932
更新日期:1992-08-01 00:00:00
abstract::Inhibitory mechanism of cerebellum epileptic activity can be involved depending on the intensity and frequency of seizure convulsions. N-methyl-D-aspartate receptors (NMDARs) play key roles in excitatory synaptic transmission and have been implicated in neurological disorders: in cerebellum, they have specific charact...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-010-9546-4
更新日期:2010-10-01 00:00:00
abstract::1. Spatio-temporal changes in phosphorylated (pNFP) and nonphosphorylated (npNFP) neurofilament proteins were assessed immunocytochemicaly in adult rat cerebellum, 2-30 days following unilateral injection of kainic acid (KA) or physiological saline (s.c.). 2. Analysis of the staining intensity and pattern demonstrated...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1023/b:cemn.0000022769.44211.2b
更新日期:2004-06-01 00:00:00
abstract::1. It has been discussed for over 100 years whether short-term memory (STM) is separate from, or just an early phase of, long-term memory (LTM). The only way to solve this dilemma is to find out at least one treatment that blocks STM while keeping LTM intact for the same task in the same animal. 2. The effect of a lar...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
doi:10.1023/a:1020715800956
更新日期:2002-06-01 00:00:00
abstract::1. Besides having a role in signal transduction, trimeric G proteins may also be involved in membrane trafficking events. In chromaffin cells, G alpha o has been found associated with the membrane of secretory granules. Here we examined the role of Go in regulated exocytosis using pressure microinjection combined with...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1023/a:1026329121099
更新日期:1997-02-01 00:00:00
abstract::Spinal cord libraries subtracted against visual cortex using suppression subtractive hybridization SSH are dominated by abundant gene sequences derived from myelin elements. We compared our subtracted library results of three of these abundant sequences to published expressed sequence tag libraries that are not normal...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-009-9408-0
更新日期:2009-12-01 00:00:00
abstract::1. Although the cellular and molecular mechanisms of the anticonvulsant action of gabapentin (GBP) remain incompletely described, in vitro studies have shown that GBP binds to the alpha2delta subunit of the high voltage-activated (HVA) Ca2+ channels. 2. In this report, we analyzed the effects of GBP on the functional ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1023/a:1019865822069
更新日期:2002-04-01 00:00:00
abstract::Hypothermia treatment is one of the neuroprotective strategies that improve neurological outcomes effectively after brain damage. Minimally invasive surgery (MIS) has been an important treatment of intracerebral hemorrhage (ICH). Herein, we evaluated the neuroprotective effect and mechanism of MIS joint local cooling ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-015-0245-z
更新日期:2016-07-01 00:00:00
abstract::MicroRNAs are small post-transcriptional regulators that modulate gene expression by directly interacting with their target transcripts. Since the interaction between miRNAs and target mRNAs does not require a perfect match, one single miRNA can influence the expression of several genes and lead to a very broad array ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-020-00836-z
更新日期:2021-01-01 00:00:00
abstract::The transforming growth factor betas (TGFbetas) are context-dependent regulators of neurons in vitro, but their physiological functions in the brain are unclear. Haploinsufficiency of either Tgfbeta1 or Tgfbeta2 leads to age-related deterioration of neurons, but the development of the brain is normal in the full absen...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-009-9354-x
更新日期:2009-07-01 00:00:00
abstract::Both sex and steroid hormones are important to consider in human ischemic stroke and its experimental models. Stroke initiates a cascade of changes that lead to neural cell death, but also activates endogenous protective processes that counter the deleterious consequences of ischemia. Steroids may be part of these cer...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
doi:10.1007/s10571-018-0627-0
更新日期:2019-05-01 00:00:00
abstract::1. Taurine applied to mouse brain slices evokes a long-lasting enhancement (LLE) of corticostriatal synaptic transmission, LLE(TAU). 2. The occurrence of LLE(TAU) was significantly decreased in the presence of the specific antagonists at either D1 (SCH23390) or D2 (raclopride) dopamine (DA) receptors. 3. LLE(TAU) was ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/s10571-005-3974-6
更新日期:2005-06-01 00:00:00
abstract::1. The effect of transient forebrain ischemia on endothelin-1 (ET-1) and endothelin-3 (ET-3) production in the hippocampus of stroke-prone spontaneously hypertensive rats (SHRSPs) was investigated using immunohistochemical techniques. 2. In SHRSPs subjected to 10-min bilateral carotid occlusion, neuronal degeneration ...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章
doi:10.1007/BF00712986
更新日期:1993-02-01 00:00:00
abstract::1. We have devised a radioimmunoassay for atrial natriueretic factor (ANF). Its application to rat brain extract led to the discovery of ANF in the brain. In addition to the hypothalamus and the pontine medullary region, it was widely distributed. 2. ANF in the brain is stored in a low molecular weight form, in contra...
journal_title:Cellular and molecular neurobiology
pub_type: 杂志文章,评审
doi:10.1007/BF00711444
更新日期:1989-03-01 00:00:00