Navegando por Assunto "Ethnopharmacology"

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Acesso aberto (Open Access)
Avaliação da atividade cicatrizante do extrato hidroalcoólico de Ayapana triplinervis (Vahl) R.M. King & H. Robinson (ASTERACEAE)
(Universidade Federal do Pará, 2020-07-16) NASCIMENTO, Suellen Carolina Martins do; LIMA, Anderson Bentes de; http://lattes.cnpq.br/3455183793812931; https://orcid.org/ 0000-0002-0534-2654; ANDRADE, Marcieni Ataíde de; http://lattes.cnpq.br/8514584872100128; https://orcid.org/ 0000-0001-5875-695X
Wound healing is a complex process that involves the organization of cells, chemical signals and remodeling in order to repair injured tissue. North American statistical data show a prevalence of skin lesions in approximately 22.8% of the world's population. In Brazil, wounds are a serious public health problem. In this sense, the use of medicinal plants as therapeutic agents has aroused interest among researchers due to their most different effects, including healing. Thus, ethnopharmacological studies are found in the literature, which associate the use of A. triplinervis with wound healing, but there is no scientific evidence to prove this activity. Thus, this study aims to evaluate the healing potential of the hydroalcoholic extract of A. triplinervis incorporated in an ointment of 5 and 10%. For that, phytochemical analyzes were carried out: prospecting of the plant drug and the hydroalcoholic extract, by means of colorimetric, precipitation tests, thin layer chromatography and high-performance liquid chromatography of the hydroalcoholic extract. In addition to the macroscopic, morphometric analysis, and histological examination of the hydroalcoholic extract ointment in 5% and 10%, using Dersani® and saline solution, respectively, as positive and negative controls. Through these tests, it was observed that the plant drug presented several compounds: saponins, anthraquinones, steroids and triterpenes, polyphenols and coumarins. For the hydroalcoholic extract the result was similar, but the tests did not indicate the presence of anthraquinones. Analysis by thin layer chromatography of the hydroalcoholic extract revealed positive results for coumarins, steroids and triterpenes. In the chromatographic profile, the extract, obtained by high performance liquid chromatography, showed a peak, being suggestive of coumarin. Macroscopic analysis of the lesions showed that the groups of the 5% and 10% extract ointments had more re-epithelialized wounds. In morphometry there was no statistical difference between the four test groups in the percentage of wound contraction. However, the histological examination showed that the ointment with 10% hydroalcoholic extract showed better quality in the development of tissue repair, as it increased fibroblasts, collagen, keratinization, more than the other groups. Thus, this study showed that A. triplinervis extract ointment did not accelerate the speed of wound closure, however, it did show a beneficial influence on the quality in which the lesions evolved, yet further research is necessary to better understand It is made.
Acesso aberto (Open Access)
Avaliação de atividade antimicrobiana e perfil fitoquimíco de plantas medicinais utilizadas por comunidades remanescentes de quilombos no Marajó
(Universidade Federal do Pará, 2020-12-28) SILVA, Suzana Helena Campelo Nogueira da; MONTEIRO, Marta Chagas; http://lattes.cnpq.br/6710783324317390; https://orcid.org/ 0000-0002-3328-5650; SILVA, Consuelo Yumiko Yoshioka e; http://lattes.cnpq.br/8337688339279747; https://orcid.org/ 0000-0002-9120-1910
The ethnopharmacological survey is recognized as one of the most viable methods in the search for new medicinal plants, with the ultimate purpose of producing medicines of natural or semi-synthetic origin. In this sense, the remaining communities of Amazonian quilombolas (Marajó-PA) carry with them a great deal of knowledge about the use of medicinal plants, which has been passed down for generations in Mararajo soil, promoting the value of popular knowledge and its applicability in future studies. The objective of this study is to provide scientific support for the traditional use of plants in the treatment of dermatological diseases in quilombola communities in Marajó that do not yet have an adequate chemical and / or pharmacological study. During the fieldwork carried out between 2017 and 2018, 13 communities were interviewed, in which 7 plants with use in skin diseases were cited. Such plants were collected, and their exsiccates were prepared. After botanical identification by a qualified professional, an extensive bibliographic review was carried out, after which 3 plants were selected for phytochemical and pharmacological study (in vitro in Microsporum and Staphylococcus aureus). In addition, they were subjected to ORAC antioxidant and TP total polyphenols tests. The phytochemical profile was analyzed using liquid chromatography coupled to mass spectrometry (LC-MS) providing 17 chemical constituents, belonging to the flavonoid class. The results of the in vitro tests showed an antibacterial potential of the ethanolic extract of the leaves of C. alatus (MIC) of 0.625 µg / mL and (CBM) of 0.734 µg / mL and of the ethanol extract of the roots D. floribunda (MIC) of 125, 0 ug / mL and 200.0 μg / mL (CBM) compared to S. aureus, with emphasis on the F3 fraction (MIC) 25.0 μg / mL and (CBM) of 132.0 which presented the highest bacterial inhibition. Therefore, the results contributed to the validation of popular use and chemical characterization of the species that presented antimicrobial potential, which can be a promising candidate for herbal medicine.