Involvement of dendritic adhesion molecule telencephalin in hippocampal long-term potentiation.
Telencephalin (TLCN) is a cell adhesion molecule belonging to the immunoglobulin superfamily whose expression is restricted to neurons within the most highly developed brain segment, telencephalon. Immunoelectronmicroscopic study revealed that in the hippocampal CA1 region, TLCN was localized at the surface membrane of postsynaptic spines of pyramidal cell dendrites but not at that of axonal terminals. Blocking of TLCN function using anti-TLCN antibody or recombinant soluble TLCN protein caused a striking suppression of the long-term potentiation (LTP) at the Schaffer collateral-CA1 synapses. The suppression was observed even when the blocking was initiated immediately after the tetanic stimuli. These observations suggest a role for TLCN-mediated cell-cell interactions as a key step in the development of LTP.
Sakurai
E
E
Department of Molecular Pharmacology, Faculty of Pharmaceutical Sciences, Kyoto University, Japan.
Hashikawa
T
T
Yoshihara
Y
Y
Kaneko
S
S
Satoh
M
M
Mori
K
K
D000818:Animals; D015815:Cell Adhesion Molecules; D015816:Cell Adhesion Molecules, Neuronal / Q000378:metabolism*; D002450:Cell Communication / Q000502:physiology; D003712:Dendrites / Q000502:physiology*; D006624:Hippocampus / Q000502:physiology*; D006801:Humans; D007150:Immunohistochemistry; D066298:In Vitro Techniques; D017774:Long-Term Potentiation / Q000502:physiology*; D008297:Male; D008562:Membrane Glycoproteins / Q000378:metabolism*; D009419:Nerve Tissue Proteins / Q000378:metabolism*; D009473:Neuronal Plasticity / Q000502:physiology; D017966:Pyramidal Cells / Q000502:physiology; D051381:Rats; D017207:Rats, Sprague-Dawley; D011994:Recombinant Proteins / Q000378:metabolism; D013569:Synapses / Q000502:physiology
D015815:Cell Adhesion Molecules; D015816:Cell Adhesion Molecules, Neuronal; C086747:ICAM5 protein, human; D008562:Membrane Glycoproteins; D009419:Nerve Tissue Proteins; D011994:Recombinant Proteins