Abstract：
:Postmortem caudate and substantia nigra tissue samples from human parkinsonian patients (PD) and age-matched controls (NC) were analyzed for uric acid (UA), dopamine (DA), and ascorbic acid (AA) by HPLC/UV/ED. Uric acid and DA levels were significantly lower in the substantia nigra of PD by 54% and 85%, respectively. In the caudate, DA levels were significantly lower while UA levels were nonsignificantly reduced (0.10 < p < 0.05). Ascorbic acid levels were not significantly different from the controls in either brain region. Conditions favorable for oxidative stress were evaluated by measuring the oxidation of DA in individual brain homogenates. The rate constant for DA oxidation in control caudate was 0.34 x 10(-2) min-1 and in parkinsonian caudate was 4.20 x 10(-2) min-1. In control and parkinsonian substantia nigra DA oxidation rate constants were 2.82 x 10(-2) min-1 and 4.57 x 10(-2) min-1, respectively. Addition of UA or catalase to parkinsonian homogenate decreased the rate of DA oxidation, while addition of uricase to control homogenate increased the rate of DA oxidation. The data support the hypothesis that UA is decreased in nigrostriatal dopamine neurons in parkinsonian patients which contributes to an environment susceptible to oxidative stress, particularly through dopamine oxidation reactions.
journal_name
Brain Res Bulljournal_title
Brain research bulletinauthors
Church WH,Ward VLdoi
10.1016/0361-9230(94)90285-2subject
Has Abstractpub_date
1994-01-01 00:00:00pages
419-25issue
4eissn
0361-9230issn
1873-2747pii
0361-9230(94)90285-2journal_volume
33pub_type
杂志文章abstract：:Glaucoma is no longer viewed simply as elevated intraocular pressure (IOP) that damages the optic nerve. In addition to high IOP, evidence is rapidly accumulating that suggests damage to the optic nerve may be initiated or sustained by any number of factors including ischemia, excitotoxicity, neurotrophin insufficienc...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/S0361-9230(03)00074-1
更新日期：2004-02-15 00:00:00
abstract：:Pretreatment with the 5-HT2 antagonist ketanserin and the 5-HT1A/2 antagonist spiperone did not reduce nicotine-induced hypomotility in mice, nor did MDL 7222, a selective 5-HT3 antagonist. In addition, 8-OH-DPAT and buspirone, 5-HT1A agonists, had no significant effects on nicotine-induced hypomotility. However, 8-OH...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(94)90252-6
更新日期：1994-01-01 00:00:00
abstract：:A new silver method for senile plaques and neurofibrillary tangles (NFT) in paraffin sections is presented. This new technique is rapid in execution (15 min) and reveals senile plaques of all morphological types as well as NFT. The silver staining is spatially congruent with immunocytochemical staining for the beta-am...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(94)90135-x
更新日期：1994-01-01 00:00:00
abstract：:It has been suggested that the stimulation of the secretion of PRL by the alpha 2 adrenergic receptor antagonists (yohimbine, piperoxane) results from blockade of an inhibitory influence imposed on PRL release by the central alpha 2 receptors (7, 15). Our present results do not support these conclusions for the follow...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(89)90184-6
更新日期：1989-12-01 00:00:00
abstract：:Fenfluramine, an anorexigenic drug, lowers serotonin (5-hydroxytryptamine) and 5-hydroxyindoleacetic acid levels in brain, spinal fluid, and blood, and has been used as a treatment for autism. Fenfluramine's mode of action is unknown. We present evidence from chromatography and nuclear magnetic resonance spectroscopy ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(84)90209-0
更新日期：1984-01-01 00:00:00
abstract：:The effects of chronic administration of delta 9-tetrahydrocannabinol (delta 9-THC) on the plasma and brain catecholamine (CA) levels were measured using high performance liquid chromatography-electrochemical detection (LC-EC) system. Intact male rats were injected daily with vehicle (50 microliter oil) or with delta ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(85)90179-0
更新日期：1985-01-01 00:00:00
abstract：:Endogenous opioids (EO) probably do not modulate endotoxin (LPS)- or interleukin 1 (IL1)-induced fever because naloxone does not prevent its development. Yet, increases in CSF and hypothalamic levels of beta-endorphin have been reported during LPS-and IL1-induced fevers. Since IL1 also reduces the specific binding of ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(85)90210-2
更新日期：1985-12-01 00:00:00
abstract：:We studied mitochondria in the satellite cell sheaths which envelope the spinal ganglion neurons of rabbits aged 12, 42, and 79 months. While the mean cytoplasmic volume of satellite cell sheaths did not change significantly with age, the mean percentage of cytoplasmic volume occupied by mitochondria decreased with ag...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(03)00101-1
更新日期：2003-07-15 00:00:00
abstract：:A novel cholinergic immunotoxin (conjugate of the monoclonal antibody 192IgG against the low-affinity nerve growth factor receptor with the cytotoxin saporin) producing selective lesions of cholinergic neurons in rat basal forebrain was applied to study its effect on hippocampal and cerebral cortical cholinergic neuro...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(95)02002-9
更新日期：1995-01-01 00:00:00
abstract：:Since years there is a hotly discussed dispute whether event-related potentials are either generated by an evoked component or by resetting of ongoing phase. We argue that phase-reset must not be proven in order to accept the general involvement of phase in ERP-generation as it is only one of several possible mechanis...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2011.03.025
更新日期：2011-07-15 00:00:00
abstract：:Evidence concerning the presence or absence of common neuronglia lineages in the postnatal mammalian central nervous system is still a matter of speculation. We address this problem using optic nerve explants, which show an extremely long survival in culture. Morphological, immunocytochemical and immunochemical method...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(92)90225-m
更新日期：1992-01-01 00:00:00
abstract：:Nagase genetically analbuminemic rats (NAR) were run to fatigue. Administration of branched chain amino acids (BCAA) before exhaustive exercise, resulted in a post-fatigue decreased tryptophan uptake (-22%, p < 0.05) and 5-hydroxytryptophan (5-HTP) uptake (-29%, p < 0.01) into the synaptosomes isolated from the striat...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(99)00276-2
更新日期：2000-05-01 00:00:00
abstract：:Thyroid hormones are essential for neonatal brain development. It is well established that absence of thyroid hormones during critical periods of development can alter sensory functions such as visual and auditory processing, but there are few studies on rat somatosensory system development at mild, long-term, and irr...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2019.11.015
更新日期：2020-02-01 00:00:00
abstract：:Cerebral ischemic damage in gerbils was assessed by locomotor activity studies and histopathological examination of the hippocampal CA1 pyramidal cell layer. Pretreatment with AICAr (50 and 500 mg/kg) 30 min prior to a 5-min ischemic episode in unanesthetized gerbils, significantly attenuated the degree of ischemic ne...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(90)90277-7
更新日期：1990-07-01 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：:Nogo, also known as Reticulon-4, is a protein that is specific to the central nervous system (CNS), and has been identified as an inhibitor of neurite outgrowth. Nogo-A is the largest member of the Nogo family and is responsible for inhibition of CNS regeneration. The structural information and biological functions of...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/j.brainresbull.2012.02.011
更新日期：2012-04-10 00:00:00
abstract：:Regions of the midbrain in the rat were stimulated electrically with bipolar electrodes to identify responsive, single neurons in the parafloccular lobule of the cerebellum. Eighty four percent (44/52) of the cells recorded in the paraflocculus showed evidence of a modulation in simple spike discharge activity (mossy ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(84)90054-6
更新日期：1984-03-01 00:00:00
abstract：:Seven benzodiazepine-receptor ligands of the beta-carbolines' group were administered IP in Wistar rats from (1) a strain displaying spontaneous petit mal-like seizures (PMLS) characterized by spike and wave discharges (SWD) and, (2) a strain where no seizure is ever observed (NS). Five different types of effects were...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(87)90101-8
更新日期：1987-09-01 00:00:00
abstract：:Peroxynitrite (ONOO-) is a strong biological oxidant formed by the diffusion-limited reaction of nitric oxide (NO-) and superoxide anion (O2-). It has long been theorized that peroxynitrite generation could be the cause in a number of pathological conditions ranging from atherosclerosis to inflammatory, autoimmune, he...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/j.brainresbull.2017.05.008
更新日期：2017-07-01 00:00:00
abstract：:Patterns of female sexual behavior in the hamster are qualitatively different from that observed in the rat. Hamsters demonstrate tonic immobility and a sustained lordotic response that can last for several minutes following minimal stimulation from the male while in rats, the lordotic response is highly dependent upo...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(87)90064-5
更新日期：1987-12-01 00:00:00
abstract：:Extracellular matrix (ECM) molecules in the central nervous system form highly organized ECM structures around cell somata, axon initial segments, and synapses and play prominent roles in early development by guiding cell migration, neurite outgrowth and synaptogenesis, and by regulating closure of the critical period...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/j.brainresbull.2017.03.003
更新日期：2018-01-01 00:00:00
abstract：:The two experiments of the present study examined the influence of bilateral electrophysiologically-guided ibotenic acid lesions of the medial (gustatory) and lateral (viscerosensory) subdivisions of the parabrachial nucleus (PBN) on lipoprivic feeding and on the acquisition of a conditioned taste aversion. In Experim...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(02)00766-9
更新日期：2002-05-01 00:00:00
abstract：:Levels of serotonin were measureed in microdissected, individual brain nuclei in ovariectomized rats after treatment with ovarian hormones. Regions sampled included nuclei in the forebrain, rostral and medial hypothalamus, and midbrain tegmentum. Estradiol benzoate decreased levels of luteinizing hormone in plasma but...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(79)90044-3
更新日期：1979-07-01 00:00:00
abstract：:Central nervous system habituation in humans was studied using functional magnetic resonance imaging and repeated presentations of single fearful and neutral faces. Habituation of blood-oxygenation-level-dependent (BOLD) signal during exposure to face stimuli, collapsed over fearful and neutral expressions, was eviden...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(02)00940-1
更新日期：2003-01-30 00:00:00
abstract：:The morphological interactions between astroglial and neuronal elements were elucidated in the rat suprachiasmatic nucleus (SCN) by light and electron microscopic immunocytochemistry using antibodies against glial fibrillary acidic protein (GFAP), vasoactive intestinal peptide (VIP) and arginine-vasopressin (AVP). Thr...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(97)00403-6
更新日期：1998-01-01 00:00:00
abstract：:The catecholamines dopamine, epinephrine and norepinephrine, as well as the indoleamine serotonin were measured using radioenzymatic assays, in the frontal cortex of normal rats and of rats in which serotonin synthesis had been inhibited with p-chlorophenylalanine. Besides serotonin, norepinephrine levels were signifi...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(82)90010-7
更新日期：1982-05-01 00:00:00
abstract：:Results using radial mazes suggest rats may have a greater short-term memory (STM) capacity than the human "magical number seven." We examined spatial STM in humans using a radial maze analog drawn on paper. Subjects were instructed to lift, in "random" order, each of 17 cardboard flaps arranged radially around a cent...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(93)90058-j
更新日期：1993-01-01 00:00:00
abstract：:Comparison of detailed physiological and morphological data shows that the hypothalamic aggression region in the rat largely coincides with the intermediate hypothalamic area. This region has a neuronal density of about 35.10(3) neurons per mm3, a synaptic density of about 300.10(6) per mm3, and a synapse to neuron ra...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(93)90030-f
更新日期：1993-01-01 00:00:00
abstract：:The processing of amyloid precursor protein (APP) to amyloid beta (Aβ) is of great interest to the Alzheimer's disease (AD) field. Decades of research define how APP is altered to form Aβ, and how Aβ generates oligomers, protofibrils, and fibrils. Numerous signaling pathways and changes in cell physiology are known to...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/j.brainresbull.2016.08.009
更新日期：2017-07-01 00:00:00
abstract：:Astrocytes are key active elements of the brain that contribute to information processing. They not only provide neurons with metabolic and structural support, but also regulate neurogenesis and brain wiring. Furthermore, astrocytes modulate synaptic activity and plasticity in part by controlling the extracellular spa...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/j.brainresbull.2017.02.001
更新日期：2018-01-01 00:00:00
