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      A review of antimalarial plants used in traditional medicine in communities in Portuguese-Speaking countries: Brazil, Mozambique, Cape Verde, Guinea-Bissau, São Tomé and Príncipe and Angola

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          Abstract

          The isolation of bioactive compounds from medicinal plants, based on traditional use or ethnomedical data, is a highly promising potential approach for identifying new and effective antimalarial drug candidates. The purpose of this review was to create a compilation of the phytochemical studies on medicinal plants used to treat malaria in traditional medicine from the Community of Portuguese-Speaking Countries (CPSC): Angola, Brazil, Cape Verde, Guinea-Bissau, Mozambique and São Tomé and Príncipe. In addition, this review aimed to show that there are several medicinal plants popularly used in these countries for which few scientific studies are available. The primary approach compared the antimalarial activity of native species used in each country with its extracts, fractions and isolated substances. In this context, data shown here could be a tool to help researchers from these regions establish a scientific and technical network on the subject for the CPSC where malaria is a public health problem.

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          Evidence of artemisinin-resistant malaria in western Cambodia.

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            Natural products as sources of new drugs over the period 1981-2002.

            This review is an updated and expanded version of a paper that was published in this journal in 1997. The time frame has been extended in both directions to include the 22 years from 1981 to 2002, and a new secondary subdivision related to the natural product source but applied to formally synthetic compounds has been introduced, using the concept of a "natural product mimic" or "NM" to join the original primary divisions. From the data presented, the utility of natural products as sources of novel structures, but not necessarily the final drug entity, is still alive and well. Thus, in the area of cancer, the percentage of small molecule, new chemical entities that are nonsynthetic has remained at 62% averaged over the whole time frame. In other areas, the influence of natural product structures is quite marked, particularly in the antihypertensive area, where of the 74 formally synthetic drugs, 48 can be traced to natural product structures/mimics. Similarly, with the 10 antimigraine drugs, seven are based on the serotonin molecule or derivatives thereof. Finally, although combinatorial techniques have succeeded as methods of optimizing structures and have, in fact, been used in the optimization of a number of recently approved agents, we have not been able to identify a de novo combinatorial compound approved as a drug in this time frame.
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              Antimalarials from nature.

              Malaria is a major public health problem mainly due to the development of resistance by the most lethal causative parasitic species, Plasmodium falciparum to the mainstay drugs like chloroquine. New drugs with unique structures and mechanism of action are urgently required to treat sensitive and drug-resistant strains of malaria. Historically, compounds containing novel structure from natural origin represent a major source for the discovery and development of new drugs for several diseases. This review presents recent advances in antimalarial drug discovery from natural sources, including plant extracts, and compounds isolated from plants, bacteria, fungi and marine organisms. These compounds offer new and novel scaffolds for development as antimalarials. The literature from 1998 to October 2008 is reviewed. The review present literature compilation from plant and marine extracts, alkaloids (naphthylisoquinolines, bisbenzylisoquinolines, protoberberines and aporphines, indoles, manzamines, and miscellaneous alkaloids) terpenes (sesquiterpenes, triterpenes, diterpenes, and miscellaneous terpenes) quassinoids, flavonoids, limonoids, chalcones, peptides, xanthones, quinones and coumarines, and miscellaneous antimalarials from nature. The review also provides an outlook to recent semisynthetic approaches to antimalarial drugs discovered from natural sources.
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                Author and article information

                Journal
                mioc
                Memórias do Instituto Oswaldo Cruz
                Mem. Inst. Oswaldo Cruz
                Instituto Oswaldo Cruz, Ministério da Saúde (Rio de Janeiro, RJ, Brazil )
                0074-0276
                1678-8060
                August 2011
                : 106
                : suppl 1
                : 142-158
                Affiliations
                [04] Rio de Janeiro RJ orgnameFiocruz orgdiv1Instituto Oswaldo Cruz Brasil
                [02] orgnameFarmanguinhos orgdiv1Departamento de Produtos Naturais orgdiv2Laboratório de Plantas Medicinais e Derivados
                [01] Manaus AM orgnameUniversidade Federal do Amazonas orgdiv1Departamento de Química orgdiv2Laboratório de Cromatografia Brasil
                [03] Lisboa orgnameUniversidade Nova de Lisboa orgdiv1Instituto de Higiene e Medicina Tropical orgdiv2Unidade de Parasitologia Portugal
                Article
                S0074-02762011000900019 S0074-0276(11)10600000019
                10.1590/S0074-02762011000900019
                5990c6c7-cd49-4fb8-8d88-6642dbc9f13b

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

                History
                : 25 March 2011
                : 26 July 2011
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 140, Pages: 17
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                SciELO Brazil

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                antimalarial,medicinal plants,extracts,malaria,folk medicine

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