Abstract：
:beta-Amyloid and related peptides are components of the neurofibrillary tangles found in the brains of patients with Alzheimer's disease and have been suggested to be directly involved in the pathophysiology of that condition. It is unclear whether the amyloid deposited in the brain arises from the peripheral circulation, which would require passage across the blood-brain barrier (BBB), or whether it is produced within the brain itself. We examined the ability of beta-amyloid1-28 (beta Am), a commercially available, biologically active fragment, radioactively labeled with 125I (I-beta Am), to cross the BBB. After IV injection of I-beta Am, radioactivity entered the brain slowly, but to a greater extent than could be attributed to its being trapped in the vascular space of the brain. Entry was not inhibited by an excess of unlabeled beta Am or by pretreatment with aluminum, indicating that entry was by the nonsaturable mechanism of transmembrane diffusion. After intraventricular injection of I-beta Am, radioactivity was cleared slowly from the brain and was not affected by excess unlabeled beta Am or by pretreatment with aluminum, indicating that clearance probably occurred with reabsorption of cerebrospinal fluid. The excess beta Am did not alter the brain/blood ratio or the clearance rate of radioactively labeled albumin, indicating that under the conditions of this experiment beta Am did not have measurable effects on BBB integrity or on the rate of reabsorption of cerebrospinal fluid. High performance liquid chromatography (HPLC) showed that I-beta Am was rapidly degraded, especially by the brain, to smaller peptide fragments.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Brain Res Bulljournal_title
Brain research bulletinauthors
Banks WA,Kastin AJ,Barrera CM,Maness LMdoi
10.1016/0361-9230(91)90215-6subject
Has Abstractpub_date
1991-12-01 00:00:00pages
819-23issue
6eissn
0361-9230issn
1873-2747pii
0361-9230(91)90215-6journal_volume
27pub_type
杂志文章abstract：:Trisomy of the whole or distal part of human chromosome 21 (HSA 21) (Ts21) results in Down Syndrome (DS), which is characterized in part by mental retardation and associated neurological abnormalities. Structural abnormalities observed frequently include reduced brain weight, decreased number and depth of sulci in the...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/0361-9230(86)90074-2
更新日期：1986-06-01 00:00:00
abstract：:Massively obese males often show symptoms of hypogonadism, but the mechanism for this is unclear. Increased endogenous opioid inhibition of the hypothalamic GnRH pulse generator resulting in insufficient stimulation of the pituitary gonadotroph has been proposed as a possible mechanism. If this hypothesis is correct, ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(94)90142-2
更新日期：1994-01-01 00:00:00
abstract：:Amyotrophic lateral sclerosis (ALS) is a degenerative disease with a progressive loss of motor neurons in the central nervous system (CNS). However, there are unsolved problems with the therapies for this disease. α-Lipoic acid (LA) is a natural, universal antioxidant capable of scavenging hydroxyl radicals as well as...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2018.05.019
更新日期：2018-06-01 00:00:00
abstract：:Cell-free incorporation of (14C) leucine into protein was 38% greater for cerebral cortical microsomes from 22-day old neonatally thyroidectomized rats compared to littermate controls. In contrast, incorporation by liver microsomes of hypothyroid rats was 33% lower compared to controls, confirming their deficient horm...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(80)90275-0
更新日期：1980-01-01 00:00:00
abstract：:Hippocampal theta activity is a large amplitude, sinusoidal wave that occurs during attentive immobility and exploratory behaviour in the rat, and it is thought to be involved in memory formation. Recent reports suggest that corticotropin-releasing hormone (CRH) has pro-mnemonic effects in rodents. Because memory-enha...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(99)00039-8
更新日期：1999-04-01 00:00:00
abstract：:Prenatal cocaine exposure has been shown to cause neurobehavioral abnormalities. To determine whether effects on basic patterns of cell development underlie these functional deficits, we examined the aftermath of acute and chronic cocaine exposure on ontogenetic patterns of ornithine decarboxylase (ODC), a key regulat...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(93)90043-b
更新日期：1993-01-01 00:00:00
abstract：:Three sets of experiments have been conducted that suggest that adrenal glucocorticoids play a role in the long-term control of intake and in dietary preferences. First, obesity is dependent upon glucocorticoid-modulated metabolic pathways. Surgical or pharmacological manipulations in obese animals that eliminate or d...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(91)90136-8
更新日期：1991-09-01 00:00:00
abstract：:Fos and other immediate early gene products are used as markers for neuronal activity. We identified Fos immunocytochemically after KCI-induced depolarization of cultured hypothalamic neurons. Five-day cultures were treated for 1 h with 50 mM KCI or media and fixed at 0, 0.5, 1, 2, and 4 h posttreatment. Sequential im...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(94)00220-u
更新日期：1995-01-01 00:00:00
abstract：:Cardiolipin is a mitochondrial membrane phospholipid with several well-defined metabolic roles. Cardiolipin can be released extracellularly by damaged cells and has been shown to affect peripheral immune functions. We hypothesized that extracellular cardiolipin can also regulate functions of microglia, the resident im...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2019.01.002
更新日期：2019-03-01 00:00:00
abstract：:Regenerative medicine strategies rely on exogenous cell transplantation and/or endogenous cell stimulation. Biomaterials can help to increase the regenerative potential of cells and biomolecules by controlling transplanted cell fate and provide a local, sustained release of biomolecules. In this review, we describe th...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/j.brainresbull.2019.03.005
更新日期：2019-05-01 00:00:00
abstract：:Using microdialysis, the effects of endogenous dopamine on basal extracellular concentrations of gamma-aminobutyric acid (GABA) and on the increases of GABA produced by glutamate were investigated in the medial prefrontal cortex of the awake rat. The dopamine uptake inhibitor nomifensine (1, 100 and 1000 microM), used...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(00)00353-1
更新日期：2000-10-01 00:00:00
abstract：:Recent accounts of major depression have tended to focus on dysfunction of frontothalamic-striatal reentrant circuits as a possible source of the disorder. Evidence of frontostriatal involvement in unipolar major depression from lesion and neuropsychological studies, and functional and structural imaging studies is ex...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/s0361-9230(98)00126-9
更新日期：1998-11-01 00:00:00
abstract：:Prenatal cocaine exposure increases mu-opioid receptor binding in dopaminergic terminal areas and enhances behavioral responsiveness to mu-opioid agonists. We investigated the influence of early postnatal cocaine treatment on in vitro mu- and delta-opioid receptor activation in male and female weanling rats. Pups rece...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(00)00323-3
更新日期：2000-09-15 00:00:00
abstract：:Adult female Zucker lean and obese rats were treated for 14 days with 3.5 nm/kg oleoyl-estrone (OE) in liposomes (Merlin-2) through continuous i.v. injection with osmotic minipumps. Rat wt. and food intake were measured daily. On days 0, 3, 6, 10, and 14, groups of rats were killed and their hypothalamic nuclei [later...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(98)00050-1
更新日期：1998-08-01 00:00:00
abstract：:The use of neurons induced from stem cells has been introduced as an effective strategy for promoting peripheral nerve regeneration (PNR). The evolution and role of native denervated Schwann cells (SCs) were often ignored when exploring the mechanisms underlying neural transplantation therapy for PNR. The aim of this ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2018.03.005
更新日期：2018-05-01 00:00:00
abstract：:Early life Stress is a worldwide concern linked with development of later life neurological disorders. Early developmental age is sensitive to many prominent environmental insults like malnourishment, immune inflammation, abuse, maternal separation, alcohol and drugs. Hence, an individual during an early age encounter...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/j.brainresbull.2019.02.005
更新日期：2019-04-01 00:00:00
abstract：:Mechanisms underlying shock-induced conditioned fear - a paradigm frequently used to model posttraumatic stress disorder, PTSD - are usually studied shortly after shocks. Some of the brain regions relevant to conditioned fear were activated in all the c-Fos studies published so far, but the overlap between the activat...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2012.04.001
更新日期：2012-07-01 00:00:00
abstract：:Trans-2, 4-dimethoxystibene (S3) is a synthetic stilbenes. In the present study, S3 was investigated to assess its neuroprotective effect against the toxicity induced by Abeta(25-35) in hypercholesterolemic rats. Rats were fed with hypercholesterolemic chow for six weeks, and then received a single intracerebroventric...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2010.04.016
更新日期：2010-07-30 00:00:00
abstract：:Since the second decade of this century it has been known that opiates can influence ingestive behaviors. Generally, opioid agents enhance feeding and opioid antagonists decrease feeding. The present paper reviews the responsiveness of different animal species to opiates in relation to ingestive behaviors, the opioid ...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/0361-9230(85)90116-9
更新日期：1985-06-01 00:00:00
abstract：:The non-adenosine nucleoside guanosine (Guo) was demonstrated to decrease quinolinic acid(QA)-induced seizures, spontaneously emerged absence epileptic seizures and lipopolysaccharide(LPS)-evoked induction of absence epileptic seizures suggesting its antiepileptic potential. It was also described previously that intra...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2016.05.001
更新日期：2016-06-01 00:00:00
abstract：:Studies have indicated that glutamate receptor subunit 3 peptide B antibodies (GluR3B Ab's) by directing against a-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid subtype glutamate receptors (AMPARs) subunit 3 (GluR3B) was involved in the hippocampal neuron damage in the pathogenesis of epilepsy. Glutamate accumula...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2016.12.016
更新日期：2017-04-01 00:00:00
abstract：:Eighty-four percent of principal cells in the dorsal nucleus of the lateral geniculate body exhibited a transient depression of spontaneous activity following optic tract stimulation. Antidromic corticofugal activity, generated by the evoked cortical field potential, was seen in 21% of the cells studied. In those cell...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(80)80002-5
更新日期：1980-07-01 00:00:00
abstract：:Recent studies demonstrate that activation of Ca(2+)-permeable N-methyl-D-aspartate (NMDA) receptors upregulates phosphorylation of mitogen-activated protein kinases (MAPKs) in heterologous cells and neurons. In cultured rat striatal neurons, the present work systematically evaluated the role of a number of protein ki...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2008.11.004
更新日期：2009-03-30 00:00:00
abstract：:Endogenous adrenergic drive regulates the firing rate of serotonergic neurons. However, advocates of feedback theory assert that 5-hydroxytryptamine (5-HT) released in the somatodendritic region of raphe neurons regulates both rate and release of 5-HT. Experiments were done to determine if the somatodendritic region m...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(01)00567-6
更新日期：2001-08-01 00:00:00
abstract：:Interferon-alpha (IFN-alpha, 2.0 x 10(4) units) was bilaterally microinjected into the medial preoptic area and anterior hypothalamus in conscious rats treated 10 min prior with an opioid receptor antagonist, naloxone (NLX, 2 mg/kg, IM) or a prostaglandin synthetase inhibitor, acetaminophen (ACAP, 25 mg/kg, IM). The I...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(94)00259-2
更新日期：1995-01-01 00:00:00
abstract：:Regeneration following bilateral optic nerve crush was studied in groups of goldfish housed either on a standard diurnal cycle or under total light deprivation. Unoperated fish were included in each deprivation condition. Regeneration was only slightly delayed in the surgical group housed under light deprivation (68-8...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(82)90034-x
更新日期：1982-01-01 00:00:00
abstract：:The large neurons in the rat neostriatum consist of at least two morphologically distinct types in Golgi preparations: Type I large cells had smooth somata whereas type II large cells had somatic spines. In the present study, the ultrastructural morphology of the Golgi-stained large neostriatal neurons in the rat was ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(82)90091-0
更新日期：1982-06-01 00:00:00
abstract：:Clinical and pre-clinical evidences indicate an association between inflammation and depression since increased levels of pro-inflammatory cytokines are associated with depression-related symptoms. Atorvastatin is a cholesterol-lowering statin that possesses pleiotropic effects including neuroprotective and antidepres...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2019.01.018
更新日期：2019-03-01 00:00:00
abstract：:The effect of progesterone (P) on monoamine levels and turnover was evaluated in 8 brain nuclei in estrogen-primed rats. Animals were subcutaneously (SC) injected with P or vehicle 21 hours after SC treatment with 5 micrograms of estradiol benzoate (EB). EB-primed animals treated with P showed high levels of lordosis ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(87)90085-2
更新日期：1987-08-01 00:00:00
abstract：:Parkinson's disease (PD) is mostly known as a dopamine deficiency syndrome due the structural and functional changes in striatal projection neurons. However, studies have considered this pathology as a multi-systemic disease in which the neurodegenerative process extends beyond the dopaminergic system. Therefore, the ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2019.01.009
更新日期：2019-03-01 00:00:00
