Summary
This study describes the catecholaminergic innervation of rat hippocampal neurons at the electron microscopic level by using an antibody against tyrosine hydroxylase (TH) and immunocytochemical techniques. In a first series of experiments, the course and distribution as well as the synaptic contacts of TH-immunoreactive fibers were analyzed with the peroxidase-antiperoxidase (PAP) method. Next, peroxidase immunostaining of TH fibers was combined with glutamate decarboxylase (GAD) immunostaining, using avidinated ferritin as a second electrondense marker. Our results demonstrate that TH-immunostained terminals establish asymmetric synaptic contacts with spines of pyramidal neurons, and symmetric synaptic contacts with cell bodies and dendritic shafts of ferritin-labeled GAD-immunoreactive nonpyramidal cells.
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Dedicated to Professor Dr. T.H. Schiebler on the occasion of his 65th birthday.
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Frotscher, M., Leranth, C. Catecholaminergic innervation of pyramidal and GABAergic nonpyramidal neurons in the rat hippocampus. Histochemistry 88, 313–319 (1988). https://doi.org/10.1007/BF00570289
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DOI: https://doi.org/10.1007/BF00570289