Anti-dermatophyte activity of the aqueous extracts of Thai medicinal plants / Atividade antidermatófita dos extratos aquosos de plantas medicinais tailandesas

Medicinal plants have long been prescribed in Thailand for centuries. Different constituents of extracts have been used for treating of various infectious diseases. However, there is even less information available regarding the use in fungal skin infection. In order to assess traditional Thai claims about the therapeutic potential, this study is focused on exploring the anti-dermatophyte property of the plants that are currently used as traditional medicines. The potential of four different plant species were selected for investigate in vitro anti-dermatophyte activity. Ethanolic extracts of Chromolaena odorata (L.), Ageratina adenophora (Spreng.), Eclipta prostrate (Linn.), and Acorus calamus (L.). were analysed for their total phenolic content as well as total flavonoid content and were then subjected to test of their anti-dermatophyte properties using agar well diffusion method. Qualitative flavonoids and phenolics analysis of the extracts showed their biologically active constituents. Among the species examined, the result indicated that most of the extracts demonstrated anti-dermatophyte activity. In particular, A. calamus showed the highest efficacy against test organisms. The experiment confirmed the chemical constituents and efficacy of some selected plants and provides a scientific confirmation of the use of Thai plants in traditional medicine for fungal skin infections.

As plantas medicinais são prescritas há muito tempo na Tailândia, há séculos. Diferentes constituintes de extratos têm sido usados para o tratamento de várias doenças infecciosas. No entanto, existem ainda menos informações disponíveis sobre o uso em infecções fúngicas da pele. A fim de avaliar as alegações tradicionais tailandesas sobre o potencial terapêutico, este estudo está focado em explorar a propriedade antidermatófita das plantas que são usadas atualmente como medicamentos tradicionais. O potencial de quatro espécies de plantas diferentes foi selecionado para investigar a atividade antidermatófita in vitro. Extratos etanólicos de Chromolaena odorata (L.), Ageratina adenophora (Spreng.), Eclipta prostrate (Linn.) e Acorus calamus (L.) foram analisados quanto ao seu conteúdo fenólico total, bem como ao conteúdo de flavonoides totais. E então submetidos ao teste de suas propriedades antidermatófitas usando o método de difusão em ágar bem. A análise qualitativa de flavonoides e fenólicos dos extratos mostrou seus constituintes biologicamente ativos. Entre as espécies examinadas, o resultado indicou que a maioria dos extratos demonstrou atividade antidermatófita. Em particular, A. calamus mostrou a maior eficácia contra organismos de teste. O experimento confirmou os constituintes químicos e a eficácia de algumas plantas selecionadas e fornece uma confirmação científica do uso de plantas tailandesas na medicina tradicional para infecções fúngicas da pele.

Anti-dermatophyte activity of the aqueous extracts of Thai medicinal plants

Abstract Medicinal plants have long been prescribed in Thailand for centuries. Different constituents of extracts have been used for treating of various infectious diseases. However, there is even less information available regarding the use in fungal skin infection. In order to assess traditional Thai claims about the therapeutic potential, this study is focused on exploring the anti-dermatophyte property of the plants that are currently used as traditional medicines. The potential of four different plant species were selected for investigate in vitro anti-dermatophyte activity. Ethanolic extracts of Chromolaena odorata (L.), Ageratina adenophora (Spreng.), Eclipta prostrate (Linn.), and Acorus calamus (L.). were analysed for their total phenolic content as well as total flavonoid content and were then subjected to test of their anti-dermatophyte properties using agar well diffusion method. Qualitative flavonoids and phenolics analysis of the extracts showed their biologically active constituents. Among the species examined, the result indicated that most of the extracts demonstrated anti-dermatophyte activity. In particular, A. calamus showed the highest efficacy against test organisms. The experiment confirmed the chemical constituents and efficacy of some selected plants and provides a scientific confirmation of the use of Thai plants in traditional medicine for fungal skin infections.

Resumo As plantas medicinais são prescritas há muito tempo na Tailândia, há séculos. Diferentes constituintes de extratos têm sido usados para o tratamento de várias doenças infecciosas. No entanto, existem ainda menos informações disponíveis sobre o uso em infecções fúngicas da pele. A fim de avaliar as alegações tradicionais tailandesas sobre o potencial terapêutico, este estudo está focado em explorar a propriedade antidermatófita das plantas que são usadas atualmente como medicamentos tradicionais. O potencial de quatro espécies de plantas diferentes foi selecionado para investigar a atividade antidermatófita in vitro. Extratos etanólicos de Chromolaena odorata (L.), Ageratina adenophora (Spreng.), Eclipta prostrate (Linn.) e Acorus calamus (L.) foram analisados quanto ao seu conteúdo fenólico total, bem como ao conteúdo de flavonoides totais. E então submetidos ao teste de suas propriedades antidermatófitas usando o método de difusão em ágar bem. A análise qualitativa de flavonoides e fenólicos dos extratos mostrou seus constituintes biologicamente ativos. Entre as espécies examinadas, o resultado indicou que a maioria dos extratos demonstrou atividade antidermatófita. Em particular, A. calamus mostrou a maior eficácia contra organismos de teste. O experimento confirmou os constituintes químicos e a eficácia de algumas plantas selecionadas e fornece uma confirmação científica do uso de plantas tailandesas na medicina tradicional para infecções fúngicas da pele.

Apoptosis Induction Effect of Zingiberis Rhizoma Extract in Microglia BV-2 Cells

Microglia have multiple functions in regulating homeostasis of the central nervous system. Microglia cells have been implicated as active contributors to neuron damage in neurodegenerative disorders. In this study, medicinal plant extracts (MPEs) were used to evaluate the cell-death induction effect in microglia BV-2 cells. Among 35 MPEs tested in this study, 4 MPEs showed less than a 30% cell survival after 24 hours of incubation. These were Foeniculi Fructus, Forsythiae Fructus, Zingiberis Rhizoma and Hedera Rhombea. The concentration showed that 50% cell death (IC50) occurred with 33, 83, 67 Ed highlight: Please confirm wording, and 81 µ /ml, respectively. For further study, we chose Zingiberis Rhizoma (ZR) which showed a reasonably low IC50 value and an induction of cell death in a relatively narrow range. Western blot analysis showed that ZR-treated cells showed activation of caspase-3 and cleavage of PARP Ed highlight: When an acronym is first presented it needs to be spelled out in both dose- and time-dependent manners. However, the level of Bcl-2 and Bax were not changed by ZR-treatment in BV-2 cells. These results suggest that ZR-induced apoptosis in BV-2 cells occured through caspase-3 activation. The results also suggested that ZR may be useful in developing treatments for neurodegenerative diseases.

Antimicrobial agents from selected medicinal plants in Libya / 中国结合医学杂志

<p><b>OBJECTIVE</b>To test the in vitro antimicrobial efficacy of water and methanol extracts of 23 plant species that are commonly used in Libyan folk medicine.</p><p><b>METHODS</b>The antimicrobial activity was determined using the well-diffusion method. Four test microorganisms were used namely, Escherichia coli, Salmonella species, Staphylococcus aureus and Bacillus subtilis. The minimum inhibitory concentration (MIC) was determined for the high biologically active crude plant extracts.</p><p><b>RESULTS</b>Among 23 medicinal plants used in the study, only 5 methanolic extracts [Rosmarinus offcinalis L., Carduus marianium L., Lantana camara L., Rhus tripartite (ueria) Grande, and Thymus capitatus (L.) Hoffm (link)] showed the highest antimicrobial activity against Staphylococcus aureus, Bacillus subtilis and Salmonella species, while 22 methanolic and aqueous extracts showed moderate to weak antimicrobial activity on all tested organisms. However 19 of the extracts showed no activity at all against Gram-ve and Gram +ve microorganisms. MIC was found to be 1.25 mg/mL (Thymus capitatus), 3 mg/mL (Rhus tripartite), 4 mg/mL (Carduus marianium), 5 mg/mL (Rosamarinus officinalis) and 5 mg/mL (Lantana camara), respectively.</p><p><b>CONCLUSIONS</b>The present results revealed that, crude methanolic extracts of the investigated Libyan folk medicinal plants exhibited mild to high in vitro antibacterial activities against Gram-positive and Gram-negative microorganisms.</p>

Larvicidal activity of medicinal plant extracts against Anopheles subpictus & Culex tritaeniorhynchus.

Background & objectives: Mosquitoes transmit serious human diseases, causing millions of deaths every year and the development of resistance to chemical insecticides resulting in rebounding vectorial capacity. Plants may be alternative sources of mosquito control agents. The present study assessed the role of larvicidal activities of hexane, chloroform, ethyl acetate, acetone, and methanol dried leaf and bark extracts of Annona squamosa L., Chrysanthemum indicum L., and Tridax procumbens L. against the fourth instar larvae of malaria vector, Anopheles subpictus Grassi and Japanese encephalitis vector, Culex tritaeniorhynchus Giles (Diptera: Culicidae). Methods: Larvicidal activities of three medicinal plant extracts were studied in the range of 4.69 to 1000 mg/l in the laboratory bioassays against early 4th instar larvae of An. subpictus and Cx. tritaeniorhynchus. The mortality data were subjected to probit analysis to determine the lethal concentrations (LC50 and LC90) to kill 50 and 90 per cent of the treated larvae of the respective species. Results: All plant extracts showed moderate effects after 24 h of exposure; however, the highest toxic effect of bark methanol extract of A. squamosa, leaf ethyl acetate extract of C. indicum and leaf acetone extract of T. procumbens against the larvae of An. subpictus (LC50 = 93.80, 39.98 and 51.57 mg/l) and bark methanol extract of A. squamosa, leaf methanol extract of C. indicum and leaf ethyl acetate extract of T. procumbens against the larvae of Cx. tritaeniorhynchus (LC50 =104.94, 42.29 and 69.16 mg/l) respectively. Interpretation & Conclusions: Our data suggest that the bark ethyl acetate and methanol extract of A. squamosa, leaf ethyl acetate and methanol extract of C. indicum, acetone and ethyl acetate extract of T. procumbens have the potential to be used as an ecofriendly approach for the control of the An. subpictus, and Cx. tritaeniorhynchus.

Studies on anti-oral cancer activities of medicinal plant extracts

Treatment of oral cancers with chemotherapeutic agents are evaluated as an effective method for remission to reduce cancer proliferation nowadays. But, minimization of side-effects such as bone marrow suppression, gastrointestinal toxicity and renal damage is another problem to be solved. Thus, a possible approach to develop a clinically applicable chemotherapeutic agents is to screen anticancer activity among traditional medicinal plants which have been used for thousands of years with very low side-effects in orient. In this study we focused on screening anti-oral cancer activities among 14 traditional medicinal plant extracts that revealed anticancer activities on other solid tumors. The results were as follow: 1. Methanol extract of Lepidium apetalum showed the highest anti-oral cancer activity against A253 cells. At concentration of 4 microgram/ml, the cell viability was 48% under our experimental condition. IC50 value obtained was 4 microgram/ml. 2. Methanol extract of Coptis japonica and Solanum nigrum were effective on KB cells. Cell viability observed were 62% and 67% at concentration of 4 microgram/ml, and IC50 values were 12 microgram/ml and 10 microgram/ml respectively. 3. When the methanol extract of Lonicera caerule was combined with 2 microgram/ml of cisplatin, the anticancer activity was synergistically increased. One hundred microgram/ml of Lonicera caerule showed 92% (alone) or 59% (combined with cisplatin) cell viabilities. IC50 value of Lonicera caerule extract against KB cells was reduced from 301 microgram/ml to 126 microgram/ml when combined with 2 microgram/ml of cisplatin. 4. Medicinal plant extracts effective on both A253 and KB cells were Coptis japonica, Lepidium apetalum, Solanum nigrum, Caesalpiniae Lignum, Curcuma aromatica.