Roles of afadin in the formation of the cellular architecture of the mouse hippocampus and dentate gyrus.
2017
Abstract The
hippocampal formationwith tightly packed neurons, mainly at the
dentate gyrus, CA3, CA2, and CA1 regions, constitutes a one-way neural circuit, which is associated with learning and memory. We previously showed that the
cell adhesion molecules
nectinsand its binding protein afadin play roles in the formation of the mossy fiber synapses which are formed between the mossy fibers of the
dentate gyrus
granule cellsand the dendrites of the CA3
pyramidal cells. We showed here that in the afadin -deficient
hippocampal formation, the
dentate gyrus
granules cellsand the CA3, CA2, and CA1
pyramidal cellswere abnormally located; the mossy fiber trajectory was abnormally elongated; the CA3
pyramidal cellswere abnormally differentiated; and the densities of the presynaptic boutons on the mossy fibers and the
apical dendritesof the CA3
pyramidal cellswere decreased. These results indicate that afadin plays roles not only in the formation of the mossy fiber synapses but also in the formation of the
cellular architectureof the hippocampus and the
dentate gyrus.
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