Linked Life Data

9878880

Source:http://linkedlifedata.com/resource/pubmed/id/9878880

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1999-3-4
pubmed:abstractText
Calcium currents were studied in morphologically identified pyramidal and stellate neurons acutely isolated from layer II/III of rat entorhinal cortex, using the whole-cell patch-clamp configuration. The peak amplitude of high-voltage activated current (HVA) measured at +10 mV was not different in both neuron populations with 0.94+/-0.08 nA for pyramidal and 1.03+/-0.08 nA for stellate cells. Stellate neurons had a larger capacitance (14.4+/-1. 1 pF) than pyramidal neurons (9.6+/-0.8 pF), indicating a 50% larger cell surface. Most striking was the difference between the current density in stellate (79+/-8 pA/pF) versus pyramidal neurons (113+/-13 pA/pF). The potential of half maximal inactivation was not different: -37+/-2 mV (pyramidals) and -37+/-3 mV (stellates). Half of the cells contained a low-voltage activated calcium current (LVA) with a peak amplitude that was twice as large in stellate as in pyramidal neurons (0.21+/-0.04 nA resp. 0.11+/-0.03 nA; at -50 mV). In contrast to the HVA component, the current density of the LVA component was not different between cell types (13+/-3 pA/pF vs. 13+/-2 pA/pF). This implies that the relative abundance of LVA and HVA currents in stellate and pyramidal neurons is different which could result in different firing characteristics. The potential of half maximal LVA inactivation was -88+/-4 mV (pyramidals) and -85+/-3 mV (stellates). The slope of the voltage dependent steady state inactivation was steeper in stellate (7+/-1 mV) than in pyramidal cells (10+/-2 mV).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0006-8993
pubmed:author
pubmed:copyrightInfo
Copyright 1999 Elsevier Science B.V.
pubmed:issnType
Print
pubmed:day
23
pubmed:volume
816
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
554-62
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Calcium currents in acutely isolated stellate and pyramidal neurons of rat entorhinal cortex.
pubmed:affiliation
Institute for Neurobiology, University of Amsterdam, Kruislaan 320, 1098 SM, Amsterdam, Netherlands. bruehl@neurologie.uni-dusseldorf.de
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't