Abstract:
:Seizures have been reported to modify neural development in the immature brain. In this study, we attempted to determine whether pentylenetetrazol (a GABAergic receptor antagonist, PTZ)-induced seizures influence cell proliferation in zebrafish larvae (5 and 15 days of post-fertilization), using bromodeoxyuridine (BrdU) to label dividing cells. In the brains of 5 dpf larvae, PTZ treatment significantly reduced the number of BrdU-labeled cells in the telencephalic area (pallium and subpallium), diencephalic area (thalamus and preoptic area), medial tectal proliferation zone, and medial cerebellar proliferation zone to 52.4%, 62.9%, 47.2%, and 54.0% of the controls, respectively. In contrast, we noted no reductions in the number of BrdU-labeled cells in the brains of the 15 dpf larvae. The double-label of BrdU and Hu, a neuronal marker, demonstrated that the majority of newborn cells showed the neuronal phenotype. Similarly, kainic acid (200 microM), a glutamatergic receptor agonist, significantly reduced the number of BrdU-labeled cells in the telencephalic area, diencephalic area, and medial tectal proliferation zone to 51.4%, 61.9%, and 40.4% of the controls, respectively. Physostigmine (500 microM), an acetylcholinesterase inhibitor, also reduced the number of BrdU-labeled cells in the telencephalic area, diencephalic area, medial tectal proliferation zone, and medial cerebellar proliferation zone to 52.8%, 35.9%, 30.5%, and 39.8% of the controls, respectively. All of these drugs resulted in electrographic seizures in the larval brain when perfused directly through artificial cerebrospinal fluid. These results indicated that seizures result in a massive reduction in cell proliferation in wide-ranging areas of the developing brain.
journal_name
Neurotoxicol Teratoljournal_title
Neurotoxicology and teratologyauthors
Kim YH,Lee Y,Lee K,Lee T,Kim YJ,Lee CJdoi
10.1016/j.ntt.2010.04.054subject
Has Abstractpub_date
2010-09-01 00:00:00pages
551-7issue
5eissn
0892-0362issn
1872-9738pii
S0892-0362(10)00107-8journal_volume
32pub_type
杂志文章abstract::Visual thresholds for luminance increments were obtained behaviorally and electrophysiologically from rats exposed to a polychlorinated biphenyl (PCB) during development. Male Long-Evans rats exposed to 0, 0.25, or 1.0 microg/kg/day of 3,3',4,4', 5-pentachlorobiphenyl (PCB 126) through gestation and weaning were train...
journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
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journal_title:Neurotoxicology and teratology
pub_type: 杂志文章
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journal_title:Neurotoxicology and teratology
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abstract:BACKGROUND:Prenatal tobacco exposure is a risk factor for the development of externalizing behaviors and is associated with several adverse health outcomes. Because pregnancy smoking is a complex behavior with both daily fluctuations and changes over the course of pregnancy, quantifying tobacco exposure is a significan...
journal_title:Neurotoxicology and teratology
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更新日期:2011-01-01 00:00:00
abstract:OBJECTIVE:To examine the association between prenatal exposure to nicotine from tobacco smoke and infant neurobehavior using tobacco biomarkers and a sensitive and comprehensive measure of infant neurobehavior. STUDY DESIGN:Participants were 318 infants (206 White, 95 Black, 17 Other) and their mothers. Prenatal tobac...
journal_title:Neurotoxicology and teratology
pub_type: 杂志文章
doi:10.1016/j.ntt.2009.07.004
更新日期:2009-11-01 00:00:00
abstract::The increased use of cocaine in the United States and worldwide has created great concern about its effects on fetuses and neonates of pregnant cocaine abusers. The effects on neonates are varied: fetal growth delay, microcephaly, abnormal neurological functions, microphthalmia, and maternal obstetric complications. I...
journal_title:Neurotoxicology and teratology
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更新日期:1997-05-01 00:00:00
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journal_title:Neurotoxicology and teratology
pub_type: 临床试验,杂志文章
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更新日期:1997-11-01 00:00:00
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journal_title:Neurotoxicology and teratology
pub_type: 杂志文章
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更新日期:1988-03-01 00:00:00
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journal_title:Neurotoxicology and teratology
pub_type: 杂志文章
doi:10.1016/j.ntt.2010.05.007
更新日期:2010-11-01 00:00:00
abstract::Methylphenidate (MPH) is a psychostimulant commonly used for the treatment of Attention-Deficit Hyperactivity Disorder (ADHD). Since the long-term effects of this drug on the central nervous system (CNS) are not well understood, we conducted microPET/CT scans on young adult male rhesus monkeys (n=4/group) to gather in...
journal_title:Neurotoxicology and teratology
pub_type: 杂志文章
doi:10.1016/j.ntt.2016.06.005
更新日期:2016-07-01 00:00:00