TY - JOUR
T1 - Fractalkine/CX3CL1 depresses central synaptic transmission in mouse hippocampal slices
AU - Bertollini, Cristina
AU - Ragozzino, Davide
AU - Gross, Cornelius
AU - Limatola, Cristina
AU - Eusebi, Fabrizio
PY - 2006/9
Y1 - 2006/9
N2 - This work reports the effect of chemokine fractalkine/CX3CL1, an endogenous small peptide highly expressed in the central nervous system, on evoked synaptic responses investigated in mouse CA1 stratum radiatum using an electrophysiological approach. We report that in acute mouse hippocampal slices, superfusion of CX3CL1 resulted in a reversible depression of the field excitatory postsynaptic potential (fEPSP) which developed within few seconds, increased for up to 10 min of application and disappeared within 30 min after the end of CX3CL1 treatment. We also show that CX3CL1-induced synaptic depression is (i) dose-dependent with IC50 and nH values of 0.7 nM and 1, respectively, (ii) not associated with a change in paired-pulse facilitation, (iii) mediated through CX3CL1 receptor (CX3CR1), being absent in CX3CR1-/- mice and inhibited in wild-type mice by a specific blocking antibody, and (iv) occluded by the induction of homosynaptic long-term depression (LTD). We conclude that CX3CL1 is a potent neuromodulator of the evoked excitatory synaptic transmission, sharing common mechanisms with LTD.
AB - This work reports the effect of chemokine fractalkine/CX3CL1, an endogenous small peptide highly expressed in the central nervous system, on evoked synaptic responses investigated in mouse CA1 stratum radiatum using an electrophysiological approach. We report that in acute mouse hippocampal slices, superfusion of CX3CL1 resulted in a reversible depression of the field excitatory postsynaptic potential (fEPSP) which developed within few seconds, increased for up to 10 min of application and disappeared within 30 min after the end of CX3CL1 treatment. We also show that CX3CL1-induced synaptic depression is (i) dose-dependent with IC50 and nH values of 0.7 nM and 1, respectively, (ii) not associated with a change in paired-pulse facilitation, (iii) mediated through CX3CL1 receptor (CX3CR1), being absent in CX3CR1-/- mice and inhibited in wild-type mice by a specific blocking antibody, and (iv) occluded by the induction of homosynaptic long-term depression (LTD). We conclude that CX3CL1 is a potent neuromodulator of the evoked excitatory synaptic transmission, sharing common mechanisms with LTD.
KW - Chemokines
KW - fEPSP
KW - Long-term depression
KW - Mouse hippocampus
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UR - http://www.scopus.com/inward/citedby.url?scp=33747859685&partnerID=8YFLogxK
U2 - 10.1016/j.neuropharm.2006.05.027
DO - 10.1016/j.neuropharm.2006.05.027
M3 - Article
C2 - 16815480
AN - SCOPUS:33747859685
VL - 51
SP - 816
EP - 821
JO - Neuropharmacology
JF - Neuropharmacology
SN - 0028-3908
IS - 4
ER -