Abstract:
:The role of axons in the expression of the major myelin glycoprotein, P0, has been investigated using neuron/Schwann cell cultures. These cultures were either nonmyelinating or myelinating due to growth in defined medium or in medium containing serum and chick embryo extract, respectively. The neurons and Schwann cells used in the studies were derived from embryonic day 15 rat dorsal root ganglia (DRG), and the Schwann cells from these ganglia are shown not to synthesize appreciable levels of P0 prior to growth in culture. Myelinating cultures of Schwann cells and neurons grown together for 18-21 days synthesize P0 that is readily identified by immunoblotting. The nonmyelinating cultures, which do not assemble basal lamina, also synthesize P0 that is detectable by either [3H]mannose precursor incorporation or by immunoblotting. The steady-state level of P0 in the nonmyelinating cultures is less than that of the myelinating cultures, and the P0 that is synthesized by the former appears to be catabolized shortly after its biosynthesis. Since nonmyelinating Schwann cells synthesize P0 when in contact with neurites in vitro, we have examined the ability of such nonmyelinating cells to express the glycoprotein in vivo. Very little steady-state P0 is detected in immunoblots of the adult rat cervical sympathetic trunk (CST), a nerve in which approximately 99% of the axons are nonmyelinated. Similarly, the amounts of [3H]mannose and [3H]amino acids that are incorporated into newly synthesized P0 are much lower in the CST than in the adult sciatic nerve.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
J Neurosci Resjournal_title
Journal of neuroscience researchauthors
Brunden KR,Windebank AJ,Poduslo JFdoi
10.1002/jnr.490260202subject
Has Abstractpub_date
1990-06-01 00:00:00pages
135-43issue
2eissn
0360-4012issn
1097-4547journal_volume
26pub_type
杂志文章abstract::In contrast to mammals, teleost fish are able to regrow severed long-range projection axons in the central nervous system (CNS), leading to recovery of function. The optic projection in teleost fish is used to study neuron-intrinsic and environmental molecular factors that determine successful axon regrowth and naviga...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/jnr.21121
更新日期:2007-09-01 00:00:00
abstract::Metabolic abnormalities found in epileptogenic tissue provide considerable evidence of brain hypometabolism, while major risk factors for acquired epilepsy all share brain hypometabolism as one common outcome, suggesting that a breakdown of brain energy homeostasis may actually precede epileptogenesis. However, a caus...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.24019
更新日期:2017-11-01 00:00:00
abstract::To determine whether one or more opioid receptor types might be preferentially involved in gliogenesis, primary mixed glial cultures derived from mouse cerebra were continuously treated with varying concentrations of opioid agonists selective for mu (mu), i.e., DAGO ([D-Ala2, MePhe4, Gly(ol)5]enkephalin), delta (delta...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490290415
更新日期:1991-08-01 00:00:00
abstract::Multi-unit activity was recorded from the diencephalon of unanesthetized, immobilized female rats. Less than 50% of the recording sites in the hypothalamus showed changes in the level of multi-unit activity to changes in the level of glucose utilization induced by injection of 2-deoxy-D-glucose (2-DG). It was also not...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490050308
更新日期:1980-01-01 00:00:00
abstract::The dentate gyrus is selectively reduced in size in the insulin-like growth factor 1 (IGF1) null mouse brain. The purpose of this study was to determine whether this defect is due to reduced granule cell numbers, and if so, to determine whether altered cell proliferation, survival, or both contribute to attenuation of...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.1084
更新日期:2001-05-15 00:00:00
abstract::Peroxisome proliferator-activated receptor gamma coactivator 1alpha (PGC-1alpha) coactivates a number of transcription factors critical for mitochondrial biogenesis. Previously, we found that the expression of PGC-1alpha is governed by neuronal activity, but the signaling mechanism is poorly understood. The present st...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.22222
更新日期:2010-02-15 00:00:00
abstract::Axonal injury is often characterized by axonal transport defects and abnormal accumulation of intra-axonal components. Nitric oxide (NO) has a key role in mediating inflammatory axonopathy in many neurodegenerative diseases, but little is known about how nitrosative/oxidative stress affects axonal transport or whether...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.23556
更新日期:2015-06-01 00:00:00
abstract::The close homologue of L1 (CHL1) is a member of the L1 family of cell recognition molecules. The protein is expressed by a variety of nerve cell types and subpopulations of glial cells in vivo and promotes elongation of neurites and survival of nerve cells in vitro. Here we demonstrate that glial cells up-regulate exp...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.10533
更新日期:2003-03-15 00:00:00
abstract::Mutations in the beta-amyloid precursor protein (APP) gene cause familial Alzheimer's disease (AD). Although amyloid beta peptide (Abeta) is the principal constituent of senile plaques in AD, other cleavage products of APP are also implicated in playing a role in the pathogenesis of AD. C-terminal fragments of APP (AP...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4547(20000515)60:4<565::AID-JNR
更新日期:2000-05-15 00:00:00
abstract::The ErbB family, ErbB1 (also known as the epidermal growth factor receptor EGFR), ErbB2, ErbB3, and ErbB4 comprise a group of receptor tyrosine kinases that interact with ligands from the epidermal growth factor (EGF) superfamily, subsequently dimerize, catalytically activate each other by cross-phosphorylation, and t...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.20381
更新日期:2005-03-01 00:00:00
abstract::Using [3H]-dopamine (DA) as the ligand of choice, we have shown that rat lymphocytes possess DA binding sites. The binding of [3H]-DA was specific, saturable, and of high affinity. The specific binding in membranes obtained from Con A-activated lymphoblasts was greater than the binding in respective unactivated lympho...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490180112
更新日期:1987-01-01 00:00:00
abstract::There is supporting evidence of alcohol negative effects on the brain: neuroimaging and psychophysiological studies finding anatomical and functional connectivity (FC) changes associated with the dependence process. Thus, the aim of this work was to evaluate brain FC and network characteristics of alcohol-dependent in...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.24673
更新日期:2020-10-01 00:00:00
abstract::We have previously shown that Na+, K(+)-ATPase activity in hypothalamus is increased after administration of an acute dose of desipramine, a noradrenaline uptake inhibitor (Viola et al., Cell Molec Neurobiol 9:263-271, 1989). In this report the same treatment (10 mg per kg) was applied to evaluate 3H-ouabain binding i...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(sici)1097-4547(19970101)47:1<77::aid-jnr8
更新日期:1997-01-01 00:00:00
abstract::The number of older people who are suffering from memory impairment is increasing among populations throughout the world. Alzheimer's disease (AD) affects about 5% of people over 65 years old. The hippocampus, a brain area critical for learning and memory, is especially vulnerable to damage in the early stages of AD. ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.23319
更新日期:2014-04-01 00:00:00
abstract::To examine the role of platelet-derived growth factor (PDGF) in the in vivo regulation of Schwann cell proliferation, steady-state levels of mRNAs encoding PDGF A and B chains, and PDGF alpha and beta receptors were measured in immature and adult rat sciatic nerves and in cultured rat Schwann cells. PDGF B chain and P...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490310206
更新日期:1992-02-01 00:00:00
abstract::The effects of ischemia (removal of oxygen and glucose for 4 h) and anoxia (removal of oxygen alone) on astrocytes were studied in dissociated cultures of E14 spinal cord containing both neurons and astrocytes. In addition, a group of cultures was treated with a low Na+, low Ca2+, and high K+ medium during the 4-h isc...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490170212
更新日期:1987-01-01 00:00:00
abstract::The balance of bone morphogenic protein (BMP), transforming growth factor-β (TGFβ)/activin/nodal, and Wnt signals regulates the early lineage segregation of human embryonic stem cells (ESCs). Here we demonstrate that a combination of small-molecule inhibitors of BMP (Dorsomorphin) and TGFβ/activin/nodal (SB431542) sig...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.22547
更新日期:2011-02-01 00:00:00
abstract::Anoxia during delivery is a complication that can disturb infant brain development leading to various types of neurological disorders. Our studies have shown that increased body temperature of newborn rats of both sexes intensifies the postanoxic oxidative stress and prevents triggering the endogenous adaptive respons...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.24486
更新日期:2019-10-01 00:00:00
abstract::Brain metabolism increases during stimulation, but this increase does not affect all energy metabolism equally. Briefly after stimulation, there is a local increase in cerebral blood flow and in glucose uptake, but a smaller increase in oxygen uptake. This indicates that temporarily the rate of glycolysis is faster th...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/jnr.24374
更新日期:2019-08-01 00:00:00
abstract::The citric acid cycle forms a major metabolic hub and as such it is involved in many disease states involving energetic imbalance. In spite of the fact that it is being branded as a "cycle", during hypoxia, when the electron transport chain does not oxidize reducing equivalents, segments of this metabolic pathway rema...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/jnr.23196
更新日期:2013-08-01 00:00:00
abstract::The type 1 metabotropic glutamate receptor (mGluR1) plays an import role in the synaptic physiology and development of cerebellar Purkinje neurons. mGluR1 expression occurs early in the developmental program of Purkinje neurons, at an age that precedes expression of the dendritic structure. Few studies have investigat...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.21493
更新日期:2008-02-01 00:00:00
abstract::Brain slices obtained from young rats were incubated with different radioactive precursors, in the presence and absence of L-cycloserine (an inhibitor of the synthesis of sphingosine) in order to explore the possibility that transport of proteolipids--and specifically of the major myelin proteolipid PLP--to the myelin...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490220309
更新日期:1989-03-01 00:00:00
abstract::Granulocyte colony-stimulating factor (G-CSF) and its related mechanisms were investigated to assess the potential for this factor to exert neuroprotective effects against spinal cord injury in mice. Recombinant human granulocyte colony-stimulating factor (rhG-CSF) was injected into mice spinal cord hemisection models...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.23362
更新日期:2014-06-01 00:00:00
abstract::In chronic demyelinating lesions of the central nervous system, insufficient generation of oligodendrocytes (OLs) is not due to a lack of oligodendrocyte precursor cells (OPCs), because the accumulation of OPCs and premyelinating OLs can be observed within these lesions. Here we sought to identify the basis for the fa...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.23153
更新日期:2013-02-01 00:00:00
abstract::Cultures of rat C6 rat glioma cells exhibit a diminished response to isoproterenol and forskolin after being treated with phorbol 12,13-dibutyrate (PDbU). An IC50 for PDbU of 38 +/- 5 nM and 62 +/- 8 nM was observed in the isoproterenol and forskolin response, respectively. Similarly, C6 cultures exhibited a diminishe...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490250110
更新日期:1990-01-01 00:00:00
abstract::In eukaryotes, mitochondria are critical for cellular bioenergetics and mediating apoptosis. The transcriptional coactivator peroxisome proliferator-activated receptor gamma coactivator 1alpha (PGC-1alpha) is an important regulator of mitochondrial biogenesis and function. However, the role of PGC-1alpha in neuronal a...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.22354
更新日期:2010-07-01 00:00:00
abstract::GM1, GD1a, and GT1b inhibit both PDGF-stimulated and serum-stimulated DNA synthesis in Swiss 3T3 cells and the human glioma cell line U-1242 MG in a dose-dependent manner. The ganglioside inhibitory effect is counteracted in a dose-responsive fashion by serum such that ganglioside-induced inhibition is essentially abo...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490410408
更新日期:1995-07-01 00:00:00
abstract::Sphingolipidoses are a class of inherited diseases that result from the toxic accumulation of undigested sphingolipids in lysosomes and other cellular membranes. Sphingolipids are particularly enriched in cells of the nervous system, and their excessive accumulation during disease has a significant impact on the nervo...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/jnr.23763
更新日期:2016-11-01 00:00:00
abstract::Sexual differentiation of the brain occurs early in life as a result of sex-typical hormone action and sex chromosome effects. Immunocompetent cells are being recognized as underappreciated regulators of sex differences in brain and behavioral development, including microglia, astrocytes, and possibly other less well ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/jnr.23821
更新日期:2017-01-02 00:00:00
abstract::Cultures of dissociated hypothalamic cells taken from rat fetuses of 19 days of gestation were studied using time-lapse recording and sequential microphotography from 1 to 5 days in vitro (DIV) and at 7 and 21 DIV. Cultures were seeded with cells taken from fetuses grouped by sex or sexually mixed; experimental cultur...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490330210
更新日期:1992-10-01 00:00:00