Navegando por Autor "Guzen, Fausto P."

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Astragaloside IV supplementation promotes a neuroprotective effect in experimental models of neurological disorders: a systematic review
(Bentham Science Publishers, 2019-06-19) Costa, Ianara M.; Lima, Francisca O. V.; Fernandes, Luciana C. B.; Norrara, Bianca; I. Neta, Francisca; Alves, Rodrigo D.; Cavalcanti, José R. L. P.; Lucena, Eudes Euler de Souza; Cavalcante, Jeferson de Souza; Rego, Amalia C. M.; Araújo Filho, Irami; Queiroz, Dinalva B.; Freire, Marco A. M.; Guzen, Fausto P.
Background: Neurological disorders constitute a growing worldwide concern due to the progressive aging of the population and the risky behavior they represent. Herbal medicines have scientific relevance in the treatment of these pathologies. One of these substances, Astragaloside IV (AS-IV), is the main active compound present in the root of Astragalus membranaceus (Fisch.) Bge, a Chinese medicinal herb with neuroprotective properties. Objective: In the present study we performed a systematic review that sought to comprehend the neuroprotective effect presented by AS-IV in experimental models of neurological disorders. Methods: This study is a systematic review, where an electronic search in United States National Library of Medicine (PubMed), Science Direct, Cochrane Library, Scientific Electronic Library Online (SciELO), Scopus, Web of Science, Medline via Proquest and Periodicos Capes databases covering the years between 2007 and 2017, using “Astragaloside IV” and “Neurodegenerative diseases”; “Astragaloside IV” and “ Neurological disorders” as reference terms was made. Results: A total of 16 articles were identified, in which the efficacy of AS-IV was described in experimental models of Parkinson’s disease, Alzheimer’s disease, cerebral ischemia and autoimmune encephalomyelitis, by improving motor deficits and/or neurochemical activity, especially antioxidant systems, reducing inflammation and oxidative stress. Conclusion: The findings of the present study indicate that the administration of AS-IV can improve behavioral and neurochemical deficits largely due to its antioxidant, antiapoptotic and antiinflammatory properties, emerging as an alternative therapeutic approach for the treatment of neurological disorders
Nuclear organization of the substantia nigra, ventral tegmental area and retrorubral field of the common marmoset (Callithrix jacchus): a cytoarchitectonic and TH-immunohistochemistry study
(Elsevier, 2016-11) Cavalcanti, José R. L. P.; Pontes, André L. B.; Fiuza, Felipe P.; Silva, Kayo D. A.; Guzen, Fausto P.; Lucena, Eudes Euler de Souza; Nascimento Júnior, Expedito Silva do; Cavalcante, Judney Cley; Costa, Miriam Stela Maris de Oliveira; Engelberth, Rovena Clara Galvao Januario; Cavalcante, Jeferson de Souza
It is widely known that the catecholamine group is formed by dopamine, noradrenaline and adrenaline. Its synthesis is regulated by the enzyme called tyrosine hydroxylase. 3-hydroxytyramine/dopamine (DA) is a precursor of noradrenaline and adrenaline synthesis and acts as a neurotransmitter in the central nervous system. The three main nuclei, being the retrorubral field (A8 group), the substantia nigra pars compacta (A9 group) and the ventral tegmental area (A10 group), are arranged in the die-mesencephalic portion and are involved in three complex circuitries – the mesostriatal, mesolimbic and mesocortical pathways. These pathways are involved in behavioral manifestations, motricity, learning, reward and also in pathological conditions such as Parkinson’s disease and schizophrenia. The aim of this study was to perform a morphological analysis of the A8, A9 and A10 groups in the common marmoset (Callithrix jacchus – a neotropical primate), whose morphological and functional characteristics support its suitability for use in biomedical research. Coronal sections of the marmoset brain were submitted to Nissl staining and TH-immunohistochemistry. The morphology of the neurons made it possible to subdivide the A10 group into seven distinct regions: interfascicular nucleus, raphe rostral linear nucleus and raphe caudal linear nucleus in the middle line; paranigral and parainterfascicular nucleus in the middle zone; the rostral portion of the ventral tegmental area nucleus and parabrachial pigmented nucleus located in the dorsolateral portion of the mesencephalic tegmentum. The A9 group was divided into four regions: substantia nigra compacta dorsal and ventral tiers; substantia nigra compacta lateral and medial clusters. No subdivisions were made for the A8 group. These results reveal that A8, A9 and A10 are phylogenetically stable across species. As such, further studies concerning such divisions are necessary in order to evaluate the occurrence of subdivisions that express DA in other primate species, with the aim of characterizing its functional relevance

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Navegando por Autor "Guzen, Fausto P."