Linked Life Data

8987782

Source:http://linkedlifedata.com/resource/pubmed/id/8987782

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1997-11-28
pubmed:abstractText
To explore mechanisms of long-term, pathway-specific synaptic plasticity, we examined consequences of differential stimulation of Aplysia sensorimotor connections in culture where two sensory neuron (SN) inputs converge on a single target motor cell L7. A single pairing of tetanus in one SN with bath application of 5-HT evoked long-term (24 hr) increase in efficacy of the SN connection given paired stimulation that was comparable in magnitude to the increase in synaptic efficacy evoked with repeated applications of 5-HT. Repeated pairing of tetanus in one SN with applications of 5-HT evoked a significant increase in efficacy of the SN connection given paired stimuli, and significant reduction in facilitation that is normally evoked by repeated applications of 5-HT in the unpaired SN connection. Hyperpolarization of L7 or incubation with APV interfered with both enhancement of facilitation with paired stimulation and suppression of facilitation with unpaired stimulation, but without interfering with long-term facilitation evoked either by repeated applications of 5-HT or by a single pairing. The results suggest that a single connection can undergo at least two forms of activity-dependent, pathway-specific facilitation lasting more than 24 hr. One form, evoked with a single pairing, is initiated and maintained primarily by activity in the presynaptic neuron. The other form, evoked with repeated paired stimuli, requires target-dependent activity that differentially modulates long-term heterosynaptic facilitation at the converging inputs.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0270-6474
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
17
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
597-606
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Pathway-specific synaptic plasticity: activity-dependent enhancement and suppression of long-term heterosynaptic facilitation at converging inputs on a single target.
pubmed:affiliation
Center for Neurobiology and Behavior, Columbia University College of Physicians and Surgeons, New York, New York, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.