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Journal of Neuroscience, Vol 15, 1587-1604, Copyright © 1995 by Society for Neuroscience
The dendritic lamellar body: a new neuronal organelle putatively associated with dendrodendritic gap junctions
CI De Zeeuw, EL Hertzberg and E Mugnaini
Laboratory of Neuromorphology, Biobehavioural Sciences, University of Connecticut, Storrs 06269-4154.
It is shown in rat that antiserum alpha 12B/18 specifically labels a new
lamellar organelle that is exclusively located in dendritic appendages.
These dendritic lamellar bodies occur in a restricted number of brain
regions, which include areas like the inferior olive, area CA1 and CA3 of
the hippocampus, dentate gyrus, olfactory bulb, and cerebral cortex. In
these regions the neurons with lamellar bodies form dendrodendritic gap
junctions. Immunoreactivity in the inferior olive is first detected between
P9 and P15, which coincides with the development of gap junctions in this
nucleus. In the adult inferior olive, the density of dendritic lamellar
bodies is highest in the rostral medial accessory olive, the subnucleus
where electrotonic coupling is most prominent. Antiserum alpha 12B/18,
thus, specifically detects a new neuronal organelle that may be related to
dendrodendritic gap junctions.
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