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      Atividade antibacteriana de plantas úteis e constituintes químicos da raiz de Copernicia prunifera Translated title: Antibacterial activity of useful plants and chemical constituents of the roots of Copernicia prunifera

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          Abstract

          Extratos etanólicos de Qualea grandiflora e Copernicia prunifera e extrato hexânico de Dipteryx lacunifera foram avaliados quanto a atividade antibacteriana, utilizando ensaios de difusão a partir de orifício e concentração inibitória mínima (CIM), frente a cepas Gram positivas e Gram-negativas, incluindo espécies multidroga resistentes. O extrato de Q. grandiflora apresentou atividade moderada para as cepas de Staphylococcus epidermidis (CIM = 500 µg/mL) e atividade fraca sobre as demais bactérias Gram-positivas testadas e inativo sobre bactérias Gram-negativas. Os resultados obtidos com S. epidermidis apesar de moderados são importantes, uma vez que este microorganismo é o principal causador de bacteremias e sepse associada com dispositivos médicos implantados. gama-Tocoferol e a mistura de sitosterol e estigmasterol foram isolados do extrato etanólico de raiz de C. prunifera e as estruturas destes compostos foram identificadas com base na análise dos dados espectrais de RMN e comparação com a literatura.

          Translated abstract

          Ethanol extracts of Qualea grandiflora and Copernicia prunifera and hexane extract of Dipteryx lacunifera were evaluated by diffusion in agar and minimum inhibitory concentration (MIC) against Gram-positive and Gram-negative bacteria including multiresistant drug strains. The extract of Q. grandiflora presented moderate activity for Staphylococcus epidermidis (MIC = 500 µg/mL) and weak activity against other Gram-positive strains and inactive for Gram-negative species. The results obtained for S. epidermidis despite being moderate are important because this pathogen is often recovered from bacteremia and sepsis from infections of implanted devices. gamma-Tocopherol and the mixture of sitosterol and stigmasterol were isolated from the ethanol extract of the roots of C. prunifera. The structures of these compounds were identified by NMR spectroscopy and comparison with literature data.

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          Most cited references32

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          Plant products as antimicrobial agents.

          The use of and search for drugs and dietary supplements derived from plants have accelerated in recent years. Ethnopharmacologists, botanists, microbiologists, and natural-products chemists are combing the Earth for phytochemicals and "leads" which could be developed for treatment of infectious diseases. While 25 to 50% of current pharmaceuticals are derived from plants, none are used as antimicrobials. Traditional healers have long used plants to prevent or cure infectious conditions; Western medicine is trying to duplicate their successes. Plants are rich in a wide variety of secondary metabolites, such as tannins, terpenoids, alkaloids, and flavonoids, which have been found in vitro to have antimicrobial properties. This review attempts to summarize the current status of botanical screening efforts, as well as in vivo studies of their effectiveness and toxicity. The structure and antimicrobial properties of phytochemicals are also addressed. Since many of these compounds are currently available as unregulated botanical preparations and their use by the public is increasing rapidly, clinicians need to consider the consequences of patients self-medicating with these preparations.
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            Plants as source of drugs.

            This work presents a study of the importance of natural products, especially those derived from higher plants, in terms of drug development. It describes the main strategies for obtaining drugs from natural sources, fields of knowledge involved, difficulties and perspectives. It also includes a brief discussion of the specific situation in Brazil regarding the use of, trade in, and research into therapeutic resources of natural origin and the general lack of awareness of the use of potentially toxic plants, mainly in folk medicine.
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              Natural products in drug discovery and development.

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                Author and article information

                Journal
                rbfar
                Revista Brasileira de Farmacognosia
                Rev. bras. farmacogn.
                Sociedade Brasileira de Farmacognosia (Curitiba, PR, Brazil )
                0102-695X
                1981-528X
                March 2008
                : 18
                : 1
                : 90-97
                Affiliations
                [02] Teresina PI orgnameUniversidade Federal do Piauí orgdiv1Centro de Ciências da Saúde orgdiv2Departamento de Parasitologia e Microbiologia Brasil
                [01] Teresina PI orgnameUniversidade Federal do Piauí orgdiv1Centro de Ciências da Natureza orgdiv2Departamento de Química Brasil
                Article
                S0102-695X2008000100017 S0102-695X(08)01800117
                10.1590/S0102-695X2008000100017
                c4c14005-c2ba-4787-95b8-6031969eda7f

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 14 January 2007
                : 12 October 2007
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 35, Pages: 8
                Product

                SciELO Brazil

                Categories
                Trabalhos Originais

                Qualea grandiflora,Copernicia prunifera,Dipteryx lacunifera,atividade antibacteriana,isoprenóides,antibacterial activity,isoprenoids

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