CA1 pyramidal neuron: dendritic Ca2+ inhibition (Muellner et al. 2015)

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Accession:206244
In our experimental study, we combined paired patch-clamp recordings and two-photon Ca2+ imaging to quantify inhibition exerted by individual GABAergic contacts on hippocampal pyramidal cell dendrites. We observed that Ca2+ transients from back-propagating action potentials were significantly reduced during simultaneous activation of individual nearby GABAergic synapses. To simulate dendritic Ca2+ inhibition by individual GABAergic synapses, we employed a multi-compartmental CA1 pyramidal cell model with detailed morphology, voltage-gated channel distributions, and calcium dynamics, based with modifications on the model of Poirazi et al., 2003, modelDB accession # 20212.
Reference:
1 . Müllner FE, Wierenga CJ, Bonhoeffer T (2015) Precision of Inhibition: Dendritic Inhibition by Individual GABAergic Synapses on Hippocampal Pyramidal Cells Is Confined in Space and Time. Neuron 87:576-89 [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;
Brain Region(s)/Organism: Hippocampus;
Cell Type(s): Hippocampus CA1 pyramidal GLU cell;
Channel(s): I Calcium; I Sodium; I Potassium; I h;
Gap Junctions:
Receptor(s):
Gene(s):
Transmitter(s): Gaba;
Simulation Environment: NEURON;
Model Concept(s): Action Potentials; Dendritic Action Potentials; Active Dendrites; Calcium dynamics;
Implementer(s): Muellner, Fiona E [fiona.muellner at gmail.com];
Search NeuronDB for information about:  Hippocampus CA1 pyramidal GLU cell; I h; I Sodium; I Calcium; I Potassium; Gaba; 
% Compare synapse activation to voltage-clamp at the same position
% ---
% Fiona Müllner, MPI Neurobiology
% Email: fiona.muellner at gmail.com

clearvars -except rootfolder
figure;
cd(sprintf('%s\\CA1_multi\\experiment\\regular',rootfolder))
filen='simulationData_2.dat';
pathn=cd;
LoadAndSave

subplot(2,3,1)
hold all; xlim([5 12])
pos=1;cond=[1];time=9;chan=4;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'b','LineWidth',2);
pos=1;cond=[3];time=9;chan=4;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'r','LineWidth',2);
subplot(2,3,2)
hold all; xlim([5 12])
pos=1;cond=[1];time=9;chan=2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'b','LineWidth',2);
pos=1;cond=[3];time=9;chan=2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'r','LineWidth',2);
subplot(2,3,3)
hold all; xlim([5 12])
pos=1;cond=[1];time=9;chan=12;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'b','LineWidth',2);
pos=1;cond=[3];time=9;chan=12;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'r','LineWidth',2);

subplot(2,3,4)
hold all; xlim([5 12]); ylim([1 1.42]*1e-4)
pos=1;cond=[1];time=9;chan=4+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'b','LineWidth',2);
pos=1;cond=[3];time=9;chan=4+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'r','LineWidth',2);
subplot(2,3,5)
hold all; xlim([5 12]); ylim([1 1.42]*1e-4)
pos=1;cond=[1];time=9;chan=2+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'b','LineWidth',2);
pos=1;cond=[3];time=9;chan=2+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'r','LineWidth',2);
subplot(2,3,6)
hold all; xlim([5 12]); ylim([1 1.42]*1e-4)
pos=1;cond=[1];time=9;chan=12+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'b','LineWidth',2);
pos=1;cond=[3];time=9;chan=12+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'r','LineWidth',2);

clearvars -except rootfolder
cd(sprintf('%s\\CA1_multi\\experiment\\vclamp',rootfolder))
filen='simulationData_2.dat';
pathn=cd;
LoadAndSave

subplot(2,3,1)
hold all; xlim([5 12])
pos=1;cond=[1];time=9;chan=4;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'c','LineWidth',1);
pos=1;cond=[3];time=9;chan=4;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'m','LineWidth',1);
subplot(2,3,2)
hold all; xlim([5 12])
pos=1;cond=[1];time=9;chan=2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'c','LineWidth',1);
pos=1;cond=[3];time=9;chan=2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'m','LineWidth',1);
subplot(2,3,3)
hold all; xlim([5 12])
pos=1;cond=[1];time=9;chan=12;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'c','LineWidth',1);
pos=1;cond=[3];time=9;chan=12;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'m','LineWidth',1);

subplot(2,3,4)
hold all; xlim([5 12]); ylim([1 1.42]*1e-4)
pos=1;cond=[1];time=9;chan=4+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'c','LineWidth',1);
pos=1;cond=[3];time=9;chan=4+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'m','LineWidth',1);
subplot(2,3,5)
hold all; xlim([5 12]); ylim([1 1.42]*1e-4)
pos=1;cond=[1];time=9;chan=2+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'c','LineWidth',1);
pos=1;cond=[3];time=9;chan=2+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'m','LineWidth',1);
subplot(2,3,6)
hold all; xlim([5 12]); ylim([1 1.42]*1e-4)
pos=1;cond=[1];time=9;chan=12+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'c','LineWidth',1);
pos=1;cond=[3];time=9;chan=12+n/2;
plot(timeref,A(2:end-2,(pos-1)*nk*nj*n + (cond-1)*nj*n + (time-1)*n + chan),'m','LineWidth',1);