Linked Life Data

3952258

Source:http://linkedlifedata.com/resource/pubmed/id/3952258

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1986-3-28
pubmed:abstractText
Morphological changes in peripheral nerve caused by the venoms of the scorpions Leiurus quinquestriatus and Centruroides sculpturatus were compared with those caused by Phoneutria nigriventer spider venom. Both scorpion venoms are known to delay the inactivation of sodium currents, Centruroides venom also altering the voltage dependence of sodium gating. Venom was injected by means of a glass micropipette into the sciatic nerves of anaesthetized mice. After survival times ranging from 15 min to 24 h the nerves were examined by light and electron microscopy. The two scorpion venoms caused alterations virtually identical to those produced by Phoneutria venom, which included swelling of the nodal axoplasm and accumulation of fluid in the periaxonal space of myelinated fibres. These alterations were most marked after 1 to 2 h and had largely disappeared by 24 h. Pre-treatment of the nerves with tetrodotoxin, which specifically blocks sodium channels, completely prevented both the nodal axoplasmic swelling and the periaxonal oedema. It seems likely that these effects result from an action common to the three venoms and that this is probably a delay in the inactivation of sodium current at the node of Ranvier.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0144-8757
pubmed:author
pubmed:issnType
Print
pubmed:volume
71
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
115-22
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
Morphological abnormalities in myelinated nerve fibres caused by Leiurus, Centruroides and Phoneutria venoms and their prevention by tetrodotoxin.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't