Abstract:
:The transforming growth factors beta (TGF-beta), a family of regulatory polypeptides, are involved in numerous vital processes including inflammation and wound healing. Since repair of a peripheral nerve lesion includes a series of well-defined steps of cellular actions possibly controlled by TGF-beta s, and since TGF-beta mRNA and immunoreactivity have been found in the normal peripheral nerve, we have examined in the lesioned peripheral nerve. Sciatic nerves of adult rats were either crushed (allowing axonal regeneration) or transfected (to prevent axonal regeneration and to induce Wallerian degeneration in the distal stump). After intervals of 6 hours, 2 and 6 days post-lesion, the rats were sacrificed and each nerve was cut into four segments, two proximal and two distal to the lesion site. TGF-beta 1-3 mRNA were determined for each segment. We demonstrate that TGF-beta 1 mRNA levels are higher than those of TGF-beta 3; the amplitude of mRNA regulation depends on time, type of lesion and localization relative to the lesion site. TGF-beta 2 mRNA could not be detected. For TGF-beta 1-3 immunocytochemistry, animals were sacrificed 12, 24, 48, 72 hours and 7 and 14 days after surgery. TGF-beta immunoreactivity (IR) was observed for all isoforms in lesioned and unlesioned nerves. In the segment directly adjacent to the lesion at its proximal side, an increase of TGF-beta-IR became apparent as soon as 12 hours after surgery; it remained elevated during the whole period observed in both models. In the segment adjoining the distal side of the lesion, an increase of TGF-beta-IR was observed after 48 hours, which was still present after 14 days. At day 7 after crush or transection, an increase of TGF-beta-IR was detected in the most distal segments, which reached its highest levels at the end of our observation period. Our results suggest that the presence of axonal contact might induce an enhancement of TGF-beta expression by Schwann cells in the distal stump of a lesioned and regenerating peripheral nerve. Since we demonstrate an increase of TGF-beta mRNA and protein expression also in the distal stump of transected nerves where Schwann cells are not able to contact sprouting axons from the proximal part, other regulatory pathways must exist. The acquisition of a "reactive" Schwann cell phenotype after peripheral nerve lesion might involve an upregulation of TGF-beta expression.
journal_name
J Neurosci Resjournal_title
Journal of neuroscience researchauthors
Rufer M,Flanders K,Unsicker Kdoi
10.1002/jnr.490390408subject
Has Abstractpub_date
1994-11-01 00:00:00pages
412-23issue
4eissn
0360-4012issn
1097-4547journal_volume
39pub_type
杂志文章abstract::The objective of this study was to compare cerebrospinal fluid (CSF) levels of the light subtype of the neurofilament proteins (NFL), tau, and beta-amyloid42 (Abeta42) in individuals with moderate or severe white matter changes (WMC) and in those with mild or no WMC. Twenty-two patients with Alzheimer's disease (AD), ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.1242
更新日期:2001-11-01 00:00:00
abstract::This study examined the effect of chronic exposure to ethanol and brain-derived neurotrophic factor (BDNF) on the responsiveness of cerebellar granule cells to gamma-aminobutyric acid (GABA). Cerebellar granule cell cultures were chronically exposed to ethanol (100 mM), BDNF (20 ng/ml), or the combination of ethanol a...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.10694
更新日期:2003-09-01 00:00:00
abstract::An experimental model based on kainic acid (KA) injections replicates many phenomenological features of human temporal lobe epilepsy, the most common type of epilepsy in adults. Taurine, 2-aminoethanesulfonic acid, present in high concentrations in many invertebrate and vertebrate systems, is believed to serve several...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.21950
更新日期:2009-05-01 00:00:00
abstract::The birth of cells with neurogenic potential in the adult brain is assessed commonly by detection of exogenous S phase markers, such as bromodeoxyuridine (BrdU). Analysis of other phases of the cell cycle, however, can provide insight into how external factors, such as opiates, influence the cycling of newly born cell...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.20090
更新日期:2004-06-15 00:00:00
abstract::Adhesion responses triggered by integrin-class matrix receptors have been implicated in the synaptic reorganization events necessary for certain types of neuronal plasticity. Hippocampal slice cultures were used to test whether the related structural transformations elicited by NMDA receptor stimulation are regulated ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4547(20000315)59:6<827::AID-JNR
更新日期:2000-03-15 00:00:00
abstract::During late postnatal development, mice with the autosomal recessive wobbler mutation (wr/wr) develop motoneuron degeneration associated with astrogliosis in the spinal cord. In vitro, primary wobbler astrocytes are also affected, exhibiting abnormal cell-cell contacts. To characterize further the wobbler disease, we ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:
更新日期:2000-01-01 00:00:00
abstract::Post-translational modification of neural cell adhesion molecule (NCAM) with alpha2,8-linked polysialic acid, which regulates homophilic adhesion and/or signal transduction events, is crucial to synaptic plasticity in the developing and adult brain. Evidence from in vitro models has implicated polysialylation in the r...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/1097-4547(20000915)61:6<636::AID-JNR7>3.0.
更新日期:2000-09-15 00:00:00
abstract::Multiple sclerosis (MS) is an inflammatory, demyelinating disease of the central nervous system with an autoimmune attack on the components of the myelin sheath and axons. The etiology of the disease remains largely unknown, but it is commonly acknowledged that the development of MS probably results from the interacti...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/jnr.24023
更新日期:2017-10-01 00:00:00
abstract::Six different types of spectral responses were recorded from horizontal cells under mesopic conditions in perfused retina, isolated from the dark-adapted mojarra (Eugerres plumieri). They were tentatively termed photopic Lr-, Lg1-, Lg2-, Lb-, and C-type, and scotopic L-type. The Lr-, Lg-, and Lb-type responses showed ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490200214
更新日期:1988-01-01 00:00:00
abstract::Increase of intracellular [Ca(2+)] evoked by action potentials in a cell can induce long-term synaptic plasticity even without concomitant presynaptic stimulation. We used optical recording of the fluorescence of a Ca(2+)-indicator Oregon Green to investigate whether differences in results obtained with modifications ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.20104
更新日期:2004-05-15 00:00:00
abstract::Sympathetic noradrenergic nerve fibers, stained with antiserum for tyrosine hydroxylase (TH), richly innervate the splenic white pulp. These fibers distribute with the vascular and trabecular systems, and associate mainly with the central artery and its branches, the periarteriolar lymphatic sheath (PALS), the margina...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490180107
更新日期:1987-01-01 00:00:00
abstract::Although protein kinase Cdk5-p35 is important in many aspects of the development and function of the central nervous system, relatively little is known about its regulation. In the present study, we examined the relationship between the association of this kinase with membranes and its activity in perinatal and adult ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.21438
更新日期:2007-11-01 00:00:00
abstract::The properties of neuronal plasma membranes are highly specialized, since they include the receptors by which many hormones, neurotransmitters, drugs, and toxins initiate their actions, as well as the components necessary for receiving synaptic input from a variety of sources and for generating the appropriate pattern...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490150412
更新日期:1986-01-01 00:00:00
abstract::Amyotrophic lateral sclerosis is an age-related neurological disease, characterized by neurofilament (NF) accumulation in primary axons followed by degeneration of motor neurons. To elucidate age-related factors that might lead to pathological NF accumulation, NFs were compared between young and aged rats. Electron mi...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:
更新日期:1999-10-15 00:00:00
abstract::A coordinated up-regulation in the expression of all three neurofilament (NF) proteins occurs during postnatal development in the rat (Schlaepfer and Bruce, J Neurosci Res [in press], 1990a). In the present study, sciatic nerves were transected in neonatal rats in order to determine the effects of axotomy on the postn...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490270209
更新日期:1990-10-01 00:00:00
abstract::We review three principally different forms of injury-induced synaptic alterations. (1) Displacement of presynaptic terminals from perikarya and dendrites of axotomized neurons, (2) central changes in primary afferent terminals of peripherally axotomized sensory ganglion cells, and (3) anterograde Wallerian-type degen...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:
更新日期:1999-10-01 00:00:00
abstract::Apolipoprotein E (apo-E), a protein involved in lipid metabolism and cholesterol transport, has been found to be up-regulated in CNS injury and is associated with Alzheimer's disease in humans. In this study, we show that apo-E is also up-regulated after complete spinal cord transection in the C57BL/6 mouse. In the un...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.10482
更新日期:2003-02-01 00:00:00
abstract::As aging population is increasing, new methodologies to apprehend and enhance the mechanisms related to optimal brain function in advancing age become urgent. This review describes how the combined use of non-invasive brain stimulation (NIBS) with functional magnetic resonance imaging (fMRI) provides novel experimenta...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/jnr.24514
更新日期:2019-08-16 00:00:00
abstract::Two fundamental questions about neuron cell culture were addressed. Can one serum-free medium that was developed for optimum growth of hippocampal neurons support the growth of neurons from other regions of the brain? Is the region specific state of differentiation maintained in culture? To answer these questions, we ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490420510
更新日期:1995-12-01 00:00:00
abstract::To study the sequence of degenerative events possibly associated with cholinergic cell death in Alzheimer's disease, septal cholinergic neurons derived from rat embryonic brains were exposed to chronic excitotoxic stress by glutamate. Counts of choline acetyltransferase (ChAT)-immunopositive neurons and measurement of...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490400608
更新日期:1995-04-15 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::A rodent model of Parkinson's disease, the 1-methyl-4-(2'-methylphenyl)-1,2,3,6-tetrahydropyridine treated mouse, was used to determine whether striatal dopamine levels recover following grafting adrenal medulla into the striatum. Four types of grafts were performed: 1) adult mouse adrenal medulla, 2) adult adrenal me...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490250303
更新日期:1990-03-01 00:00:00
abstract::Iron deficiency and chronic mild carbon monoxide (CO) exposure are nutritional and environmental problems that can be experienced simultaneously. We examined the effects of chronic mild CO exposure and iron availability on auditory development in the rat. We propose that chronic mild CO exposure creates an oxidative s...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.20495
更新日期:2005-06-01 00:00:00
abstract::Double immunofluorescence studies using antibodies against NF-L and peripherin revealed three distinct subpopulations of neurons in rat dorsal root ganglia (DRG). In the adult rat, 46% of the DRG neurons were small and peripherin-positive (NF-L-negative), and 48% were large and NF-L-positive (peripherin-negative). Abo...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490300111
更新日期:1991-09-01 00:00:00
abstract::A mouse monoclonal antibody (5B9), directed against a carbohydrate epitope of human epidermal growth factor receptor (EGFR), recognized an 81-kDalton glycoprotein in buffer-soluble and detergent-solubilized rat brain extracts (BE). The glycoprotein was more abundant in extracts prepared from injured brain than in thos...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490400609
更新日期:1995-04-15 00:00:00
abstract::Oxidative stress results in protein oxidation and is implicated in cerebral disease, such as Parkinson's disease, Alzheimer's disease, and ischemic stroke. Sulfiredoxin-1 (Srxn1) is an endogenous antioxidant protein that has neuroprotective effects. The mechanisms of Srxn1 in oxidative stress have not been well studie...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.23218
更新日期:2013-06-01 00:00:00
abstract::Oxidative mechanisms of injury are important in many neurological disorders. Developing oligodendrocytes (pre-OLs) are particularly sensitive to oxidative stress-mediated injury. We previously demonstrated a novel function of phylloquinone (vitamin K(1)) and menaquinone 4 (MK-4; a major form of vitamin K2) in protecti...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.22029
更新日期:2009-07-01 00:00:00
abstract::Human T-cell lymphotropic virus type I (HTLV-I) may infect up to 10% of peripheral blood T cells in patients with HTLV-I myelopathy. To examine the impact of HTLV-I infection on the abilities of T cells to present and respond to peptide antigen, we HTLV-I infected and subcloned a myelin basic protein peptide 84-102 (M...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4547(19960915)45:6<786::AID-JNR
更新日期:1996-09-15 00:00:00
abstract::Adenosine signalling has an important role in cochlear protection from oxidative stress. In most tissues, intracellular adenosine kinase (ADK) is the primary route of adenosine metabolism and the key regulator of intracellular and extracellular adenosine levels. The present study provides the first evidence for ADK di...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.22421
更新日期:2010-09-01 00:00:00
abstract::Netrin-1 regulates axon extension during embryonic development and is expressed by neurons and myelinating oligodendrocytes in the adult CNS. To investigate the potential role of netrin-1 after spinal cord injury, we examined the expression of netrin-1 and netrin receptors after sagittal myelotomy in adult rats. This ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.21070
更新日期:2006-12-01 00:00:00