Abstract:
:Synemin (Syn) is an intermediate filament (IF) protein. To gain insight into a morphogenetic role of Syn, we have studied its expression patterns in the developing human retina and lens and compared it with those of other IF proteins. In addition, we have tested Syn expression in fetuses (23 and 28 weeks) affected by Walker-Warburg syndrome (WWS), Meckel syndrome, and trisomy 13. In the retina, Syn expression starts in the nerve fiber and ganglion cell layers (NFL and GCL) at 15 weeks, remains there in up to 20 weeks, and spreads to other layers and may be colocalized with vimentin, GFA, or neurofilaments in the subsequent 16 weeks. This expansion of Synemin expression from 20 to 28 weeks is not observed in WWS in which Syn immunoreactivity in NFL is reduced and Vim expression is increased. Changes are seen in Syn or vimentin expressions in the retinae of 23-week-old Meckel syndrome or 28-week-old trisomy 13 fetuses. Syn expression in the lens is, at first (16 weeks), uniformly distributed, becoming stronger in the epithelium of the anterior part at 25 weeks and later. As in the retina, Syn expression in lens is also selectively affected in WWS. The colocalization of Synemin with vimentin, GFA, or NF supports the idea that Syn is a key cross-linking protein that connects different cytoskeletal structures. Moreover, stagnant Syn expression in WWS retina and lens reinforces the notion of a significant role of this protein in morphogenesis.
journal_name
Exp Neuroljournal_title
Experimental neurologyauthors
Tawk M,Titeux M,Fallet C,Li Z,Daumas-Duport C,Cavalcante LA,Paulin D,Moura-Neto Vdoi
10.1016/s0014-4886(03)00240-1keywords:
subject
Has Abstractpub_date
2003-10-01 00:00:00pages
499-507issue
2eissn
0014-4886issn
1090-2430pii
S0014488603002401journal_volume
183pub_type
杂志文章abstract::The effects of methylmercury (MeHg) on cytoplasmic microtubules in cultured neuroblastoma cells, glioma cells, and fibroblasts were compared. Neuroblastoma cells appeared to be more sensitive to disruption of microtubules by MeHg than the glioma cells or fibroblasts; cellular concentrations of mercury after MeHg were ...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/0014-4886(84)90147-x
更新日期:1984-08-01 00:00:00
abstract::Radiosurgery is an important non-invasive procedure for the treatment of tumors and vascular malformations. However, in addition to killing target tissues, cranial irradiation induces damage to adjacent healthy tissues leading to neurological deterioration in both pediatric and adult patients, which is poorly understo...
journal_title:Experimental neurology
pub_type: 杂志文章,评审
doi:10.1016/j.expneurol.2012.03.011
更新日期:2012-06-01 00:00:00
abstract::Microglia were described by Pio del Rio-Hortega (1932) as being the 'third element' distinct from neurons and astrocytes. Decades after this observation, the function and even the very existence of microglia as a distinct cell type were topics of intense debate and conjecture. However, considerable advances have been ...
journal_title:Experimental neurology
pub_type: 杂志文章,评审
doi:10.1016/j.expneurol.2011.11.012
更新日期:2012-04-01 00:00:00
abstract::c-fos expression in response to noxious mechanical stimulation of the peripheral receptive field was used to study the somatotopic representation of the oral mucous membrane and trigeminal cutaneous receptive fields in the trigeminal subnucleus caudalis and the cervical spinal dorsal horn. Fos-neurons (neurons with c-...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1006/exnr.1994.1167
更新日期:1994-10-01 00:00:00
abstract::To determine whether or not brain damage is likely to occur in the repeated apneic episodes experienced by some alcoholics during intoxicated sleep, rats were anesthetized with alcohol and subjected to repeated episodes to asphyxia. Each episode lasted 90 s, arterial PO2 was less than 50 mm Hg for 60 s, and 30 episode...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/0014-4886(84)90017-7
更新日期:1984-04-01 00:00:00
abstract::RNA interference appears to have a great potential not only as an in vitro target validation, but also as a novel therapeutic strategy based on the highly specific and efficient silencing of a target gene. We hypothesize that MMP-9 siRNA can be effective as an MMP-9 protein inhibitor in a rat focal ischemia model. Mal...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2008.11.007
更新日期:2009-03-01 00:00:00
abstract::Diffuse axonal injury is thought to be the basis of the functional impairments stemming from mild traumatic brain injury. To examine how axons are damaged by traumatic events, such as motor vehicle accidents, falls, sports activities, or explosive blasts, we have taken advantage of the spinal cord with its extensive w...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2015.04.023
更新日期:2015-09-01 00:00:00
abstract::Zebrafish is an excellent model to study central nervous system (CNS) axonal degeneration and regeneration since we can observe these processes in vivo and in real time in transparent larvae. Previous studies have shown that Mauthner cell (M-cell) axon regenerates poorly after mechanical spinal cord injury. Inconsiste...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2017.10.028
更新日期:2018-02-01 00:00:00
abstract::The depressant effects of iontophoretically applied dopamine and noradrenaline on glutamate-induced neuronal firing in the amygdaloid complex of cats were significantly reduced 1 and 2 h after induction of a local epileptiform afterdischarge of the kind used in kindling. Neuronal excitation by glutamate and depression...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/0014-4886(84)90059-1
更新日期:1984-01-01 00:00:00
abstract::Dentate gyrus is usually assumed to be resistant to ischemia. However, the mechanisms underlying this functional plasticity are not fully understood. Herein, we aimed at identifying a neuroprotective mechanism in the dentate gyrus of the adult rat after global ischemia. Cyclic AMP response element (CRE)-binding protei...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2006.06.016
更新日期:2006-12-01 00:00:00
abstract::Transplantation of genetically engineered cells can provide sustained focal delivery of naturally occurring molecules, including neurotransmitters and growth factors. We have engineered immortalized mouse cortical neurons and glia to deliver GABA by driving GAD(65) expression. Engineered cell lines showed GAD(65) mRNA...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1006/exnr.1999.7305
更新日期:2000-02-01 00:00:00
abstract::Progesterone and its metabolite, allopregnanolone, are neurosteroids that are present at high concentrations in fetal brains that decrease right after birth. Allopregnanolone is a potent positive modulator of γ-aminobutyric acid A (GABA(A)) receptor function. We examined the effect of exogenous administration of these...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2011.10.004
更新日期:2012-01-01 00:00:00
abstract::Interactions between neurotrophic factors and neurotransmitters participate in the formation and maintenance of appropriate connections, as well as in neurodegenerative processes. Here we have measured changes in the developmental expression pattern of BDNF and NT-3 in the striatum, cortex, and substantia nigra induce...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1006/exnr.2000.7451
更新日期:2000-09-01 00:00:00
abstract::Peripheral nerve crush injury (PNCI) has been used for many years in adult animals to study central and peripheral changes related to regeneration across the injury site. While these adult animals experience full recovery with no neuronal cell loss following PNCI, it has been noted that the injury in perinatal animals...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1006/exnr.1999.7014
更新日期:1999-05-01 00:00:00
abstract::Olfactory ensheathing cells (OECs) have been investigated extensively as a therapy to promote repair in the injured CNS, with variable efficacy in numerous studies over the previous decade. In many studies that report anatomical and functional recovery, the beneficial effects have been attributed to the ability of OEC...
journal_title:Experimental neurology
pub_type: 杂志文章,评审
doi:10.1016/j.expneurol.2010.08.012
更新日期:2011-05-01 00:00:00
abstract::Muscle disuse-induced changes in the cholinergic system of sciatic nerve, slow-twitch soleus (SOL), and fast-twitch extensor digitorum longus (EDL) muscles were studied in rats. Rats with hind limbs suspended for 2 to 3 weeks showed marked elevation in the activity of choline acetyltransferase in sciatic nerve (38%), ...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/0014-4886(85)90012-3
更新日期:1985-09-01 00:00:00
abstract::Transgenic mice whose axons and Schwann cells express fluorescent chromophores enable new imaging techniques and augment concepts in developmental neurobiology. The utility of these tools in the study of traumatic nerve injury depends on employing nerve models that are amenable to microsurgical manipulation and gaugin...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2007.05.028
更新日期:2007-09-01 00:00:00
abstract::Parkinson's Disease (PD) and Extrapyramidal Syndrome (EPS) are movement disorders that result from degeneration of the dopaminergic input to the striatum and chronic inhibition of striatal dopamine D(2) receptors by antipsychotics, respectively. Adenosine A(2A) receptors are selectively localized in the basal ganglia,...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2010.07.011
更新日期:2010-10-01 00:00:00
abstract::The major neutral and acidic cerebellar lipids were studied in audiogenic seizure (AGS)-resistant C57BL/6 (B6) and AGS-susceptible DBA/2J (D2) mice. These cerebellar lipids were also studied in the D2.B6- Iasb congenic mice and in the B6D2F1 hybrids that are mostly AGS resistant. Except for the Iasb gene, which inhibi...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/0014-4886(84)90206-1
更新日期:1984-06-01 00:00:00
abstract::Cordotomy-denervation interactions were studied on contractile and myofibrillar properties of slow (soleus) and fast (extensor digitorum longus) muscles of the rat. The spinal cord was transected midthoracically in neonatal (2-day-old) animals. Two months after birth, a unilateral transection of the sciatic nerve was ...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/0014-4886(88)90214-2
更新日期:1988-04-01 00:00:00
abstract::It has been >20 years since studies first revealed that the brain is insulin sensitive, highlighted by the expression of insulin receptors in neurons and glia, the presence of circulating brain insulin, and even localized insulin production. Following these discoveries, evidence of decreased brain insulin receptor num...
journal_title:Experimental neurology
pub_type: 杂志文章,评审
doi:10.1016/j.expneurol.2018.12.007
更新日期:2019-03-01 00:00:00
abstract::Previous research has shown that Purinergic 2X7 receptor (P2X7R) and NLRP3 inflammasome contribute to the inflammatory activation. In this study, we investigated whether P2X7R/NLRP3 pathway is involved in the caspase-3 dependent neuronal apoptosis after ischemic stroke by using a focal cortex ischemic stroke model. Th...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2017.03.002
更新日期:2017-06-01 00:00:00
abstract::the antiexcitotoxic efficacy of melatonin, a putative endogenous hydroxyl radical scavenger, was studied in primary cultures of rat cerebellar granule neurons. Excitotoxicity was induced in 7- to 9-day-old cultures by an exposure to glutamate (15 min in the absence of magnesium) or to glutamate receptor agonists, kain...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/0014-4886(95)90005-5
更新日期:1995-01-01 00:00:00
abstract::The behavioral effects of augmenting dopamine D1 receptor expression in the brain were investigated in mice incorporating additional copies of the mouse D1 receptor gene. Two transgenic lines showed increases in brain D1 receptor binding sites, which were greatest in extrastriatal regions. The full D1 agonist SKF 8129...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1006/exnr.1999.7037
更新日期:1999-05-01 00:00:00
abstract::Tamoxifen-induced mutagenesis via the so-called CreER(T2) fusion enzyme is a key technology for the inducible gene knockout in the adult murine brain. However, it requires a subchronic transient treatment with high doses of the non-selective estrogen receptor antagonist tamoxifen. It has been shown earlier that acute ...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2007.12.012
更新日期:2008-05-01 00:00:00
abstract::HIV-associated neurocognitive disorders (HAND) continue to persist despite effective control of viral replication. Although the mechanisms underlying HAND are poorly understood, recent attention has focused on altered neuronal population activity as a correlate of impaired cognition. However, while alterations in neur...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2019.113077
更新日期:2020-01-01 00:00:00
abstract::Several independent lines of research suggest that disruption of the ubiquitin proteasome system (UPS) may play a role in the pathophysiology of Parkinson's disease. Direct intracerebral injection of UPS inhibitors (e.g. lactacystin) in animals has consistently produced important features of the disease. In this study...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2013.03.021
更新日期:2013-09-01 00:00:00
abstract::Traumatic brain injury (TBI) in animals and man generates widespread axonal injury characterized by focal axolemmal permeability changes, induction of calpain-mediated proteolysis, and neurofilament side-arm modification associated with neurofilament compaction (NFC) evolving to axonal disconnection. Recent observatio...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1006/exnr.1999.7139
更新日期:1999-09-01 00:00:00
abstract::MicroRNA-21 (miR-21) is consistently up-regulated in various neurological disorders, including epilepsy. Here, we show that the biogenesis of miR-21 is altered following pilocarpine-induced status epilepticus (SE) with an increase in precursor miR-21 (pre-miR-21) in rats. We demonstrate that pre-miR-21 has an energeti...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2016.10.003
更新日期:2016-12-01 00:00:00
abstract::In previous studies on sensory axons we reported that the effect of a conditioning lesion on increasing regeneration rate was enhanced if the two lesions were superimposed, rather than made at separate sites on the nerve, and proposed that this was due to the growth of axons through nerve predegenerated by the conditi...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/0014-4886(85)90027-5
更新日期:1985-11-01 00:00:00