Distribution of nitric oxide synthase in the rock cavy (Kerodon rupestris) brain I: The diencephalon.

Autor: Reis MEMD; Laboratory of Neuroanatomy, Department of Morphology, Biosciences Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil., Araújo LTF; Laboratory of Neuroanatomy, Department of Morphology, Biosciences Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil., de Andrade WMG; Laboratory of Neuroanatomy, Department of Morphology, Biosciences Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil., Resende NDS; Laboratory of Neuroanatomy, Department of Morphology, Biosciences Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil., Lima RRM; Laboratory of Neuroanatomy, Department of Morphology, Biosciences Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil., Nascimento ESD Jr; Laboratory of Neuroanatomy, Department of Morphology, Biosciences Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil., Costa MSMO; Laboratory of Neuroanatomy, Department of Morphology, Biosciences Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil., Cavalcante JC; Laboratory of Neuroanatomy, Department of Morphology, Biosciences Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil. Electronic address: judney@cb.ufrn.br.
Jazyk: angličtina
Zdroj: Brain research [Brain Res] 2018 Apr 15; Vol. 1685, pp. 60-78. Date of Electronic Publication: 2018 Feb 10.
DOI: 10.1016/j.brainres.2018.01.020
Abstrakt: Nitric oxide (NO) is a highly soluble and membrane-permeable neurotransmitter, so it does not need to be packed in vesicles or have a membrane receptor. In the nervous system, NO is synthesized by the neuronal form of the nitric oxide synthase (NOS) enzyme and has been considered as a local neurotransmitter. NOS distribution is widespread in the nervous system of various vertebrate species, which may explain its participation in many functions such as memory, blood pressure regulation and sexual behavior. Here we used immunohistochemistry against NOS and NADPH diaphorase histochemistry to map the distribution of NO in the diencephalon of the rock cavy (Kerodon rupestris), a rodent endemic to the Brazilian Northeast. Rock cavy has crepuscular habits and is adapted to ecological conditions such as heat and scarcity of water and food. This study found that NOS distribution was more concentrated in the hypothalamus of this animal. Among the hypothalamic nuclei, the median preoptic, supraoptic, paraventricular nucleus of the hypothalamus, ventromedial nucleus of the hypothalamus, ventral and dorsal premammillary nucleus, supramammillary nucleus, lateral mammillary nucleus and dorsal hypothalamic nucleus had the largest collections of NOS immunoreactive (NOS-ir) neurons. Some nuclei of the thalamus and epithalamus such as the paraventricular nucleus of the thalamus, the ventral lateral geniculate nucleus, the medial geniculate nucleus and the lateral habenula showed NOS-ir neurons. This distribution is similar to that described in other rodents, indicating that NO also has an important role in rock cavy's physiology.
(Copyright © 2018. Published by Elsevier B.V.)
Databáze: MEDLINE
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