Distribution and synaptic relations of NOS neurons in the dorsal raphe nucleus: a comparison to 5-HT neurons

Brain Research Bulletin
Q P WangY Nakai

Abstract

Anti-nitric oxide synthase antibody was used to study the distribution, cytoarchitecture, and synaptic relations of nitric oxide synthase-like immunoreactive neurons in the whole rostral-caudal length of the dorsal raphe nucleus of the rat and compared them with serotonergic neurons. Results showed that the distribution of the nitric oxide synthase in the dorsal raphe nucleus was similar to that of the serotonergic neurons at the rostral part of the dorsal raphe nucleus, including the mediodorsal and the medioventral cell groups, and changed at the middle and caudal parts of the dorsal raphe nucleus. The cytoarchitecture of the nitric oxide synthase-like immunoreactive neurons in the medioventral cell group of the dorsal raphe nucleus was similar to that of the serotonergic neurons. Similar to the serotonergic neurons there, nitric oxide synthase-like immunoreactive neurons also received synapses from axon terminals that contained round, or flattened vesicles, or both kinds. Different to the serotonergic neurons, the few nitric oxide synthase-like immunoreactive axon terminals that were in this area formed synapses.

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Citations

Sep 8, 2005·Brain Research Bulletin·Jesús M LópezAgustín González
Jan 27, 2004·Brain Research. Developmental Brain Research·Sergio Gustavo EvrardAlicia Brusco
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