ABSTRACT
Abstract INTRODUCTION This aim of this study was to evaluate the antibacterial activity of fractions and isolates of Maytenus guianensis, a plant species used in Amazonian folk medicine. METHODS A disk diffusion technique was used to investigate the antibacterial potential. RESULTS The hexanic fractions and tingenone B isolate showed inhibitory effects against Staphylococcus aureus and Streptococcus pneumoniae. CONCLUSIONS These results indicate the antibacterial potential of this species and will enable future studies to identify novel therapeutic alternatives from this species.
Subject(s)
Staphylococcus aureus/drug effects , Streptococcus pneumoniae , Plant Extracts/pharmacology , Maytenus/chemistry , Escherichia coli/drug effects , Klebsiella pneumoniae/drug effects , Anti-Bacterial Agents/pharmacology , Disk Diffusion Antimicrobial Tests , Anti-Bacterial Agents/isolation & purificationABSTRACT
ABSTRACT Diarrhea is an infectious disease caused by bacterial, virus, or protozoan, and dengue is caused by virus, included among the neglected diseases in several underdeveloped and developing countries, with an urgent demand for new drugs. Considering the antidiarrheal potential of species of Maytenus genus, a phytochemical investigation followed by antibacterial activity test with extracts of branches and heartwood and bark of roots from Maytenus gonoclada were conducted. Moreover, due the frequency of isolation of lupeol from Maytenus genus the antiviral activity against Dengue virus and cytotoxicity of lupeol and its complex with β-cyclodextrins were also tested. The results indicated the bioactivity of ethyl acetate extract from branches and ethanol extract from heartwood of roots of M. gonoclada against diarrheagenic bacteria. The lupeol showed potent activity against Dengue virus and low cytotoxicity in LLC-MK2 cells, but its complex with β-cyclodextrin was inactive. Considering the importance of novel and selective antiviral drug candidates the results seem to be promising.
Subject(s)
Antiviral Agents/pharmacology , Plant Extracts/pharmacology , Maytenus/chemistry , Dengue Virus/drug effects , Pentacyclic Triterpenes/pharmacology , Anti-Bacterial Agents/pharmacology , Antidiarrheals/pharmacology , Antiviral Agents/isolation & purification , Cell Line , Maytenus/classification , Pentacyclic Triterpenes/isolation & purification , Anti-Bacterial Agents/isolation & purification , Antidiarrheals/isolation & purificationABSTRACT
Abstract INTRODUCTION Maytenus guianensis is a member of the Celastraceae family that is used in traditional medicine, particularly for its anti-parasitic and anti-cancer effects. To explore the ethnopharmacological potential of this plant, the present study was designed to screen the in vitro antileishmanial activities of extracts and compounds isolated from M. guianensis. METHODS Maytenus guianensis stems and leaves were extracted in acetone, followed by the preparation of eluates and isolation of secondary metabolites using chromatography on a glass column with silica gel as the fixed phase. The chemical components were identified using spectroscopic methods, including one- and two-dimensional nuclear magnetic resonance of hydrogen-1 and carbon-13, mass spectroscopy, and infrared spectroscopy. The anti-Leishmania amazonensis activities of these eluates and compounds were evaluated by direct promastigote counting and viability assays. RESULTS It was found that the hexane bark eluate produced the strongest anti-L. amazonensis effect, with 90-100% inhibition of the promastigote form. The isolated metabolite that produced the best result was tingenone B, followed by a compound formed by the union of tingenone and tingenone B (80-90% inhibition). CONCLUSIONS Maytenus guianensis shows anti-parasite activity that warrants further investigation to determine the mechanisms underlying this antileishmanial effect and to evaluate the pharmacological potential of these eluates and isolated secondary metabolites, while minimizing any adverse effects.
Subject(s)
Leishmania braziliensis/drug effects , Plant Extracts/pharmacology , Maytenus/chemistry , Antiprotozoal Agents/pharmacology , Parasitic Sensitivity Tests , Antiprotozoal Agents/isolation & purificationABSTRACT
Leaf explants of Maytenus boaria were induced towards callus tissue culture with different mixture of cytokinins and auxins. MeOH extract of callus was partitioned with AcOEt and water, and through repeated chromatography procedures were isolated and identified, four triterpenes and three beta-agarofuran sesquiterpenes.
Explantes de hojas de Maytenus boaria fueron inducidos a formar callos mediante diferentes mezclas de citoquininas y auxinas. Un extracto metanólico de los callos fue fraccionado con AcOEt y agua, y mediante repetidas cromatografías fueron aislados e identificados siete compuestos, cuatro triterpenos y 3 sesquiterpenos del tipo agarofurano.
Subject(s)
Maytenus/chemistry , Plant Extracts/chemistry , Plant Leaves/chemistry , Sesquiterpenes/analysis , Triterpenes/analysis , Sesquiterpenes/isolation & purification , Triterpenes/isolation & purificationABSTRACT
In these work the in vitro antioxidant activity and the in vivo genotoxicity of M. dasyclada was compared to the reference species M. aquifolium and M. ilicifolia. M. dasyclada showed in vitro antioxidant activity comparable to M. aquifolium but lower than M. ilicifolia, being that a inverse Pearson correlation between DPPH IC50 values and total phenolic content was detected (–0.932). The carbonyl content of M. dasyclada and M. aquifolium extracts promoted a similar increase in protein oxidation in vivo, while M. ilicifolia no altered the carbonyl levels. The comet assay demonstrated that the three analyzed species promoted a low and similar level of genotoxicity; which is compatible with DNA damage induced by other medicinal plants and is partially recovered by a co-treatment with vitamin C. The data showed M. dasyclada as antioxidant activity in vitro, and that its genotoxic and pro-oxidant effects in vivo are comparable to the Maytenus reference species.
No presente trabalho a atividade antioxidante in vitro e a genotoxicidade in vivo de M. dasyclada foi comparada com as espécies de referência M.aquifolium e M. ilicifolia. M. dasyclada mostrou atividade antioxidante in vitro comparável a de M. aquifolium mas inferior a M. ilicifolia, sendo que foi detectada uma correlação de Pearson inversa entre os valores de IC50 por DPPH e o conteúdo fenólico total (–0,932). Em relação ao teor de carbonila, os extratos de M. dasyclada e M. aquifolium promoveram um aumento semelhante na oxidação das proteínas in vivo, ao passo que Maytenus ilicifolia não alterou os níveis de carbonila. O ensaio do cometa demonstrou que as três espécies analisadas promoveram um nível baixo e semelhante de genotoxicidade, o que é compatível com os danos no DNA induzidos por outras plantas medicinais e é parcialmente recuperada por um co-tratamento com a vitamina C. Os dados mostraram M. dasyclada com atividade antioxidante in vitro, e que os seus efeitos genotóxicos e pró-oxidantes in vivo são comparáveis às espécies de referência de Maytenus.
Subject(s)
Animals , Male , Antioxidants/pharmacology , Maytenus/chemistry , Plant Extracts/pharmacology , Plants, Medicinal/chemistry , Antioxidants/toxicity , Comet Assay , Maytenus/classification , Maytenus/toxicity , Plant Extracts/toxicity , Plants, Medicinal/classification , Plants, Medicinal/toxicity , Rats, WistarABSTRACT
Maytenus ilicifolia Mart. ex Reissek (Celastraceae), conhecida popularmente por espinheira-santa, é nativa e cultivada, principalmente, no sul do Brasil. Suas folhas apresentam triterpenos e substâncias polifenólicas (flavonóides e taninos) relacionadas ao efeito antiulcerogênico. O objetivo do trabalho foi avaliar a produção de massa seca, altura, ramificação, e o teor de polifenóis totais em plantas de M. ilicifolia que se desenvolveram sob duas condições de luminosidade, após dois tratamentos distintos de poda. O delineamento experimental foi em blocos cazualizados com plantas desenvolvidas sob sombra e a pleno sol, e com plantas manejadas por poda parcial e rasa, com quatro repetições. No tratamento de poda rasa a maior altura das plantas foi observada nas plantas cultivadas a sombra em comparação com as conduzidas a pleno sol. No tratamento de poda parcial o número de ramos terciários aumentou significativamente nas plantas conduzidas a pleno sol. As plantas cultivadas a pleno sol apresentaram diferença significativa na concentração de polifenóis totais em relação às plantas produzidas à sombra alcançando valores de 10,29 ± 0,20% (CV=1,94%) e 7,16 ± 0,09% (CV=1,30%) respectivamente.
The Maytenus ilicifolia Mart. ex Reissek (Celastraceae), traditionally known as "espinheira-santa" in Portuguese, is native and cultivated in South Brazil. Its leaves contain triterpenes and polyphenolic compounds (flavonoids and tannins), which are related to the antiulcerogenic effect. The aim of this work was to evaluate the dried biomass production (g), height (m), ramification, and also the total content in polyphenol compounds of the leaves from the M. ilicifolia specie, which were developed under two different light conditions after two different pruning treatments. The design of the experiment was randomized blocks with two levels of light (shadow or full sunlight) and two levels of prune (partial and drastic), with four replications. The height of the plants grown in the shadow was greater for the treatment of drastic pruning than in plants in full sunlight. The ramification increased significantly with drastic prune in full sunlight. The plants grown in full sunlight showed a significant higher content in total polyphenols than the plants grown in the shadow, 10.29±0.20% (RSD=1.94%) and 7.16±0.09% (RSD=1.30%) respectively.
Subject(s)
Shadowing Technique, Histology/methods , Maytenus/chemistry , Growth and Development , Plant Leaves/metabolism , Culture Techniques/classification , Polyphenols/analysisABSTRACT
Maytenus ilicifolia and Maytenus aquifolia species are widely used as a cicatrisation agent, an anti-spasmodic, contraceptive, antiulcerogenic, diuretic and analgesic. Considering the importance of these species in popular medicine, this work is focused on the determination of the chemical content of tannins and the triterpenes friedelan-3-one, friedelan-3-ol and friedelin in 15 native populations of Maytenus ilicifolia distributed in the south and mind-west regions of Brazil. Correlation of the concentration of these compounds with the environmental parameters such as average annual temperature, climate, vegetation, geomorphology, latitude and altitude was determined using Pearson's coefficient. Results showed that average annual temperature and climate have significant effect on tannin content at a 95% confidence level. The highest tannin concentration was found in Ponta Porã population, and for the triterpenes investigated, a significant correlation between their concentrations with the environmental variables studied was not verified.
As espécies de Maytenus ilicifolia e Maytenus aquifolia são utilizadas como antiespasmódico, contraceptivo, antiulcerogênico, diurético, cicatrizante e analgésico. A ação antiulcerogênica dos extratos de Maytenus ilicifolia possuem relação com a presença de taninos e com os triterpenos friedelan-3-ona, friedelan-3-ol e friedelin. Este trabalho está focado na determinação do teor de taninos e dos triterpenos friedelan-3-ona, friedelan-3-ol e friedelin em 15 populações nativas de Maytenus ilicifolia distribuídas nas regiões Sul e Centro-Oeste do Brasil. A correlação entre a concentração destes compostos com variáveis ambientais, tais como temperatura média anual (TMA), clima segundo Koeppen, vegetação, geomorfologia, latitude e altitude foi determinada através do emprego da correlação de Pearson. Os resultados mostraram que as variáveis temperatura média anual e clima apresentaram influência significativa ao nível de confiança de 95% sobre a concentração de taninos. O maior teor de taninos foi encontrado na população de Ponta Porã, a qual possui uma temperatura média anual de 23 °C. Para os triterpenos estudados, friedelan-3-ona, friedelan-3-ol e friedelin, não foi evidenciada correlação significativa entre a concentração destes compostos com as variáveis ambientais estudadas.