Linked Life Data

10591518

Source:http://linkedlifedata.com/resource/pubmed/id/10591518

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2000-1-24
pubmed:abstractText
Methyl bromide, a disinfectant gas amply used worldwide, is neurotoxic in humans and other mammals. To study its short-term effects on neurons, it was applied in aqueous solution to hippocampal slices of young rats (1.4 and 0.7 mM; for 8 minutes). Extracellular field recordings and intracellular microelectrode recordings from CA1 pyramidal neurons showed that the neurons stay viable for at least one hour after application of the mono-halomethane. However, a moderate, but consistent, irreversible decrease in synaptic excitability was observed. The intracellular recordings indicate that this may be attributed to a decrease in excitatory postsynaptic potentials. No effects were observed at 0.7 mM methyl bromide. Bromide, in a dose-dependent, partly reversible manner (during one hour), produced a similar decrease in excitability. Quantitatively, the action of bromide at 0.5 mM resembled the one seen with methyl bromide at the concentration of 1.4 mM. Since methyl bromide did not induce electrophysiologic changes consistent with evidence of neurotoxicity during one hour of observation it is concluded that it lacks immediate toxic effects on hippocampal rat neurons. Its neurotoxicity may be entirely due to metabolites or other indirect effects. The slight decrease in excitability may be due to the effect of bromide that is set free as tissue proteins and other cell molecules are methylated.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0161-813X
pubmed:author
pubmed:issnType
Print
pubmed:volume
20
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
827-32
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Methyl bromide decreases excitability without having immediate toxic effects in rat hippocampal CA1 neurons in vitro.
pubmed:affiliation
University of Santiago de Chile, Technological Faculty, Program of Management in Agriculture. mzeise@lauca.usach.cl
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't