Abstract:
:The current work tested the hypothesis that the zinc status of a cell influences its sensitivity to iron-induced oxidative stress. Human IMR-32 neuroblastoma cells were cultured for 24 h in nonchelated control media (5 microM zinc; 4.5 microM iron), or in media that was treated with DTPA to reduce its zinc content (chelated media). Chelated media was supplemented with zinc to achieve concentrations of 1.5-50 microM Zn. The media was then replaced with serum-free complex media (0.9 microM Zn) with either no added iron (0.6 microM Fe), or iron (FeCl(3)) added at concentrations ranging from 15 to 100 microM. Cells were cultured for an additional 3- to 24-hour period. Over the 24-hour period, cells cultured in the control iron media had good viability, and they displayed the gross morphology typical of these cells in culture. With 100 microM iron, cell viability was low in all groups. After 24 h and at iron concentrations between 15-50 microM, cells that had been cultured in the low zinc-chelated media (1.5 microM Zn) showed a concentration-dependent increase in 5 (or 6)-carboxy-2'7'-dichlorodihydrofluorescein diacetate (DCDCDHF) fluorescence (oxidative stress) and decrease in cell viability. A positive correlation between both parameters was observed (r = 0.92). These cells had altered morphology and high level of nucleosomes suggestive of cell death by apoptosis. These results support the concept that the zinc status of IMR-32 neuroblastoma cells modulates their sensitivity to iron overload.
journal_name
Dev Neuroscijournal_title
Developmental neuroscienceauthors
Mackenzie GG,Keen CL,Oteiza PIdoi
10.1159/000065691keywords:
subject
Has Abstractpub_date
2002-01-01 00:00:00pages
125-33issue
2-3eissn
0378-5866issn
1421-9859pii
65691journal_volume
24pub_type
杂志文章abstract::Maternal inflammation has been linked to neurodevelopmental and neuropsychiatric disorders such as cerebral palsy, schizophrenia, and autism. We had previously shown that intrauterine inflammation resulted in a decrease in serotonin, one of the tryptophan metabolites, and a decrease in serotonin fibers in the sensory ...
journal_title:Developmental neuroscience
pub_type: 杂志文章
doi:10.1159/000471509
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abstract::The myelin-associated glycoprotein (MAG) is a 100 K-dalton, integral membrane glycoprotein containing 30% carbohydrate that is in central and peripheral myelin sheaths. Recent research on its function during normal myelinogenesis and possible roles in the pathology of demyelinating diseases is reviewed. Emphasis is pl...
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abstract::Neuron-specific enolase (NSE) is a unique form of the glycolytic enzyme, enolase, which, in the brain, is strictly localized in differentiated neurons and neuroendocrine cells. In this report evidence is presented that NSE is first seen in the cell bodies of developing chick auditory and vestibular neurons shortly aft...
journal_title:Developmental neuroscience
pub_type: 杂志文章
doi:10.1159/000112689
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abstract:BACKGROUND:Neonatal hypoxic-ischemic (HI) encephalopathy occurs in 1-4 per 1,000 live term births and can cause devastating neurodevelopmental disabilities. Currently, therapeutic hypothermia (TH) is the only treatment with proven efficacy. Since TH is associated with decreased cerebral metabolism and cerebral blood fl...
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journal_title:Developmental neuroscience
pub_type: 杂志文章
doi:10.1159/000048718
更新日期:2001-01-01 00:00:00
abstract::Perinatal asphyxia is a leading cause of brain injury in neonates, occurring in 2-4 per 1,000 live births, and there are limited treatment options. Because of their similarity to humans, nonhuman primates are ideal for performing preclinical tests of safety and efficacy for neurotherapeutic interventions. We previousl...
journal_title:Developmental neuroscience
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doi:10.1159/000327246
更新日期:2011-01-01 00:00:00
abstract::This study of the molecular forms of acetylcholinesterase in several rat brain regions using sucrose gradient centrifugation has revealed only two major forms throughout postnatal development: the 4S and 10S. In all regions studied (cerebral cortex, cerebellum, caudate nucleus, hippocampus, pons-medulla and superior c...
journal_title:Developmental neuroscience
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journal_title:Developmental neuroscience
pub_type: 杂志文章
doi:10.1159/000112377
更新日期:1980-01-01 00:00:00
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journal_title:Developmental neuroscience
pub_type: 杂志文章
doi:10.1159/000111422
更新日期:1996-01-01 00:00:00
abstract::Birth asphyxia can result in sensory impairment, learning and memory deficits without gross brain injury and severe motor deficits. We developed a model of birth asphyxia resulting in mild neurological injury and cognitive impairment using a long-gestation species with precocial fetal development. Spiny mice (Acomys c...
journal_title:Developmental neuroscience
pub_type: 杂志文章
doi:10.1159/000251907
更新日期:2009-01-01 00:00:00
abstract::Autism spectrum disorder (ASD) comprises a group of neurodevelopmental disorders characterized by social deficits and stereotyped behaviors. While several theories have emerged, the pathogenesis of ASD remains unknown. Although studies report dopamine signaling abnormalities in autistic patients, a coherent dopamine h...
journal_title:Developmental neuroscience
pub_type: 杂志文章,评审
doi:10.1159/000478725
更新日期:2017-01-01 00:00:00
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journal_title:Developmental neuroscience
pub_type: 杂志文章
doi:10.1159/000504960
更新日期:2019-01-01 00:00:00
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journal_title:Developmental neuroscience
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doi:10.1159/000105473
更新日期:2007-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:2005-01-01 00:00:00
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journal_title:Developmental neuroscience
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doi:10.1159/000112698
更新日期:1982-01-01 00:00:00
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journal_title:Developmental neuroscience
pub_type: 杂志文章,评审
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更新日期:1991-01-01 00:00:00
abstract::The distribution of the noradrenergic system within the rat cerebellar cortex following low-level X-irradiation was studied using tyrosine hydroxylase immunocytochemistry. X-Irradiation treatments consisted of 1, 3, or 5 successive daily dose beginning on postnatal day 1. When studied 24 h after the last exposure, a d...
journal_title:Developmental neuroscience
pub_type: 杂志文章
doi:10.1159/000112092
更新日期:1994-01-01 00:00:00
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journal_title:Developmental neuroscience
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更新日期:2015-01-01 00:00:00
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journal_title:Developmental neuroscience
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doi:10.1159/000111320
更新日期:1993-01-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章,评审
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更新日期:1996-01-01 00:00:00