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Previous issue date: 2017-07-24 / O ?xido n?trico (NO) ? uma mol?cula gasosa que exerce papel de neurotransmissor, regulando eventos sin?pticos e participando de fun??es neurais como mem?ria e aprendizado. No sistema nervoso, o NO ? catalisado pela ?xido n?trico sintase neuronal (nNOS). Por ser uma mol?cula gasosa, o NO pode se difundir livremente atravessando a membrana das c?lulas, desta forma agindo como um neurotransmissor retr?grado, geralmente considerado um moderador de a??o local. NO e nNOS s?o mol?culas altamente conservadas entre as esp?cies e est?o presentes no sistema nervoso de diversos vertebrados. N?s realizamos imunoistoqu?micas anti-nNOS e histoqu?micas para revela??o de NADPH-diaforase com o objetivo de investigar a distribui??o de c?lulas nitr?rgicas no compartimento subcortical do telenc?falo de moc? (Kerodon rupestris). Os dados mostram uma distribui??o heterog?nea de neur?nios imunorreativos a nNOS ou com atividade NADPH-diaforase ao longo de todo o compartimento subcortical. Observou-se neur?nios imunorreativos a nNOS no n?cleo accumbens, associando o NO a mecanismos de v?cio e recompensa; nos n?cleos da am?gdala e no hipocampo, podendo estar associados a aprendizado e mem?ria; no n?cleo intersticial da estria terminal, associado a comportamentos de defesa, analgesia e fun??es cardiovasculares; e nos n?cleos da base, sugerindo papel neuroprotetor e de regula??o neural do movimento, associando-se ainda a doen?as neurodegenerativas nessas regi?es. A distribui??o de NO no telenc?falo subcortical de moc? ? ampla, heterog?nea e complexa, mas guarda muitas semelhan?as com a distribui??o em outros roedores, o que pode significar um amplo papel do NO nas fun??es cerebrais desta esp?cie. Al?m disso, o mapeamento da distribui??o de nNOS est? sendo importante para a defini??o morfol?gica de certas ?reas encef?licas de moc?, em compara??o com outras esp?cies de roedores e outros mam?feros. / Nitric oxide (NO) is a gaseous molecule that acts as a neurotransmitter, regulating synaptic events and participating in neural functions such as memory and learning. In the nervous system, NO is catalysed by neuronal nitric oxide synthase (nNOS). As a gaseous molecule, NO can diffuse freely trespassing the cells membrane. Because of this NO can act as a retrograde neurotransmitter and is usually treated as a local moderator. NO and nNOS are highly conserved among species and are present in the nervous system of many vertebrates. We performed immunohistochemical anti-nNOS and histochemical for NADPH-diaphorase in order to investigate the distribution of nitrergic cells in the subcortical compartment of the rock cavy (Kerodon rupestris) telencephalon. The data show a heterogeneous distribution of neurons immunoreactive to nNOS or with NADPH-diaphorase activity throughout the subcortical compartment. Neurons immunoreactive to nNOS were observed in the nucleus accumbens, associating NO with mechanisms of addiction and reward; in the nuclei of the amygdala and in the hippocampus, that are associated with learning and memory; in the bed nucleus of the stria terminalis, associated to defense behaviors, analgesia and cardiovascular functions; and in the basal nuclei, suggesting a putative neuroprotector role and neural regulation of the movement, being still associated with neurodegenerative diseases in these regions. The distribution of NO in the subcortical telencephalon of the rock cavy is broad, heterogeneous and complex, suggesting a broad role of NO in the cerebral functions of this species. In addition, the mapping of nNOS distribution is being important for the morphological definition of the rock cavy's brain areas in comparison with other species of rodents and other mammals.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24337 |
| Date | 24 July 2017 |
| Creators | Andrade, Wylqui Mikael Gomes de |
| Contributors | 00932163432, Cavalcanti, Jos? Rodolfo Lopes de Paiva, 04961702447, Costa, Miriam Stela Maris de Oliveira, Cavalcante, Judney Cley |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM BIOLOGIA ESTRUTURAL E FUNCIONAL, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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