DEFAR - Departamento de Farmácia

URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/530

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2016 - 20172

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Autor: search.filters.author.Ferraz Filha, Zilma SchimithAssunto: search.filters.subject.Inflammation

Resultados da Pesquisa

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    The influence of seasonality on the content of goyazensolide and on anti-inflammatory and anti-hyperuricemic effects of the ethanolic extract of Lychnophora passerina (Brazilian arnica).
    (2017) Ugoline, Bruno César de Albuquerque; Souza, Jacqueline de; Ferrari, Fernanda Cristina; Ferraz Filha, Zilma Schimith; Coelho, Grazielle Brandão; Guimarães, Dênia Antunes Saúde
    Ethnopharmacological relevance: Lychnophora passerina (Mart ex DC) Gardn (Asteraceae), popularly known as Brazilian arnica, is used in Brazilian folk medicine to treat pain, rheumatism, bruises, inflammatory diseases and insect bites. Aim of the study: Investigate the influence of the seasons on the anti-inflammatory and anti-hyperuricemic activities of ethanolic extract of L. passerina and the ratio of the goyazensolide content, main chemical constituent of the ethanolic extract, with these activities. Materials and methods: Ethanolic extracts of aerial parts of L. passerina were obtained from seasons: summer (ES), autumn (EA), winter (EW) and spring (EP). The sesquiterpene lactone goyazensolide, major metabolite, was quantified in ES, EA, EW and EP by a developed and validated HPLC-DAD method. The in vivo antihyperuricemic and anti-inflammatory effects of the ethanolic extracts from L. passerina and goyazensolide were assayed on experimental model of oxonate-induced hyperuricemia in mice, liver xanthine oxidase (XOD) inhibition and on carrageenan-induced paw edema in mice. Results: HPLC method using aqueous solution of acetic acid 0.01% (v/v) and acetonitrile with acetic acid 0.01% (v/v) as a mobile phase in a gradient system, with coumarin as an internal standard and DAD detection at 270 nm was developed. The validation parameters showed linearity in a range within 10.0–150.0 μg/ml, with intraday and interday precisions a range of 0.61–3.82. The accuracy values of intraday and interday analysis within 87.58– 100.95%. EA showed the highest goyazensolide content. From the third to the sixth hour after injection of carrageenan, treatments with all extracts at the dose of 125 mg/kg were able to reduce edema. Goyazensolide (10 mg/kg) showed significant reduction of paw swelling from the second hour assay. This sesquiterpene lactone was more active than extracts and presented similar effect to indomethacin. Treatments with ES, EA and EP (125 mg/kg) and goyazensolide (10 mg/kg) reduced serum urate levels compared to hyperuricemic control group and were able to inhibit liver XOD activity. One of the mechanisms by which ES, EA, EP and goyazensolide exercise their anti-hyperuricemic effect is by the inhibition of liver XOD activity. Goyazensolide was identified as the main compound present in ES, EA, EW and EP and it is shown to be one of the chemical constituents responsible for the anti-inflammatory and anti-hyperuricemic effects of the ethanolic extracts. Conclusion: The anti-inflammatory and anti-hyperuricemic activities of the ethanolic extracts from L. passerina were not proportionally influenced by the variation of goyazensolide content throughout the seasons. The involvement of goyazensolide on in vivo anti-inflammatory and anti-hyperuricemic activities of L. passerina extracts was confirmed, as well as the possibility of participation of other constituents on these effects. This study demonstrated that the aerial parts of L. passerina may be collected in any season for use as anti-inflammatory agent. For use in hyperuricemia, the best seasons for the collection are summer, autumn and spring. The ethanolic extract of L. passerina and goyazensolide can be considered promising agents in the therapeutic of inflammation, hyperuricemia and gout.
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    Effects of Pimenta pseudocaryophyllus extracts on gout : anti-inflammatory activity and anti-hyperuricemic effect through xantine oxidase and uricosuric action.
    (2016) Ferrari, Fernanda Cristina; Lima, Rita de Cássia Lemos; Ferraz Filha, Zilma Schimith; Barros, Camila Helena; Araújo, Marcela Carolina de Paula Michel; Guimarães, Dênia Antunes Saúde
    Ethnopharmacological relevance: Leave sin fusion of Pimenta pseudocaryophyllus (Gomes) Landrum is used in Brazilian folk medicine to treat the predisposition to arthritical and gouty affections of the joints, fever and other diseases. A refreshing drink prepared with the specie is al soused due to its diuretic, sedative and aphrodisiac actions. Aim of the study: The study was under taken to investigate the mechanisms of anti-hyperuricemic effect and anti-inflammatory activity of P. pseudocaryophyllus extracts. Materials and methods: Anti-hyperuricemic effect was investigated using xanthine oxidase assay and uricosuric studies with rats in which hyperuricemia was induced by potassium oxonate and uric acid. Anti-inflammatory activity was investigate don MSU crystal-induced paw edema model. Ethyl acetate extracts of the leaves (EAL) and branches (EAB), ethanolic extracts of leaves (EEL) and branches (EEB) and aqueous extracts of leaves (AL) and branches (AB) were evaluated. Results: The extracts of P. pseudocaryophyllus evaluated showed expressive results regarding the in-hibition of xanthine oxidase enzyme in vitro and they were also able to reduce serum uric acid levels in hyperuricemicrats. The investigation of the mechanism of action, it was found that EAL, EAB, EEB, AB (125and250mg/kg) and AL (250mg/kg) promoted an increase on the urinary excretion of uric acid and EEL, EEB, AB (125and250mg/kg) and EAB (250mg/kg) were capable to inhibit liver xanthine oxidase. Treatments with EEL (125and250mg/kg) and EEB (250mg/kg) were able to reduce edema at 48thh. EAL and EAB (125and250mg/kg) showed significant anti-inflammatory activity on monosodium urate crystal-induced paw edema model at all evaluated times. Conclusions: The specie P. pseudocaryophyllus showed remark able anti-hyperuricemic effects through uricosuric effects and inhibition of xanthine oxidase and therefore can be considered as a promise in the treatment of diseases related to hyperuricemia. Moreover, ethyl acetate extracts had significant anti- inflammatoryactivity.