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CA1 pyramidal neuron: functional significance of axonal Kv7 channels (Shah et al. 2008)
Accession: 112546
The model used in this paper confirmed the experimental findings suggesting that axonal Kv7 channels are critically and uniquely required for determining the inherent spontaneous firing of hippocampal CA1 pyramids, independently of alterations in synaptic activity. The model predicts that the axonal Kv7 density could be 3-5 times that at the soma.
Reference: Shah MM, Migliore M, Valencia I, Cooper EC, Brown DA (2008) Functional significance of axonal Kv7 channels in hippocampal pyramidal neurons. Proc Natl Acad Sci U S A 105(22):7869-7874 [PubMed]
Citations  Citation Browser
Model Information (Click on a link to find other models with that property)
Model Type:  Neuron or other electrically excitable cell; Axon; Channel;
Brain Region(s)/Organism:  
Cell Type(s):  CA1 pyramidal neuron;  
Channel(s):  I Na,t; I T low threshold; I A; I K; I M; I Calcium;  
Gap Junctions:  
Receptor(s):  
Gene(s):  
Transmitter(s):  
Simulation Environment:  Neuron;
Model Concept(s):  Action Potential Initiation; Detailed Neuronal Models; Axonal Action Potentials; Action Potentials;
Implementer(s):  Migliore, Michele [Michele.Migliore at Yale.edu];
Search NeuronDB for information about:  CA1 pyramidal neuron; I Na,t; I T low threshold; I A; I K; I M; I Calcium;
Model files   Download zip file   Auto-launch             Help downloading and running models
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km
readme.html
screenshot.jpg
cal2.mod
can2.mod
cat.mod
h.mod
kadist.mod
KahpM95.mod
kaprox.mod
kdrca1.mod
km.mod
na3n.mod
naxn.mod
cacumm.mod
cagk.mod
fig4a.hoc
fixnseg.hoc
geo9068802.hoc
mosinit.hoc
                            
NEURON mod files from the paper:

Shah MM, Migliore M, Valencia I, Cooper EC, Brown DA (2008) Functional
significance of axonal Kv7 channels in hippocampal pyramidal
neurons. Proc Natl Acad Sci U S A 105(22):7869-7874

In this paper, the model confirmed the experimental findings
suggesting that axonal Kv7 channels are critically and uniquely
required for determining the inherent spontaneous firing of
hippocampal CA1 pyramids, independently of alterations in synaptic
activity.  This action was primarily due to modulation of action
potential threshold and membrane potential (RMP), amplified by control
of intrinsic axosomatic membrane properties.  The model predicts that
the axonal Kv7 density could be 3-5 times that at the soma.
The fig4a.hoc reproduces the traces shown in Fig.4a of the paper.

Under linux/unix systems:
to compile the mod files use the command 
nrnivmodl 
and run the simulation hoc file with the command 
nrngui fig4a.hoc

Under Windows systems:
to compile the mod files use the "mknrndll" command.
A double click on the simulation file
fig4a.hoc 
will open the simulation window.

Under MAC OS X:
to compile the mod files drag and drop the extracted folder onto the
mknrndll icon. Drag and drop the mosinit.hoc file onto the nrngui
icon.

Once the model is running you can click on a button, for example,
fig. 4(ii) leads to:

screenshot

Questions on how to use this model
should be directed to michele.migliore@pa.ibf.cnr.it

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