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      Efecto antihelmíntico y antibacteriano in vitro del extracto hidroalcohólico de hojas y tallos de Kalanchoe daigremontiana Translated title: In vitro anthelmintic and antibacterial effect of Kalanchoe daigremontiana leaves and stems hydroalcoholic extract

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          Abstract

          RESUMEN Cinco concentraciones (200 a 12.5 mg mL-1) del extracto hidroalcohólico de Kalanchoe daigremontiana fueron usadas para determinar su efecto antihelmíntico y antibacteriano in vitro. Para determinar el efecto antihelmíntico se realizaron las pruebas de inhibición de la eclosión, inhibición de la motilidad y mortalidad larvaria sobre Haemonchus contortus (HC). La determinación de la Concentración Mínima Inhibitoria y Concentración Mínima Bactericida, permitieron evaluar la actividad antibacteriana del extracto sobre L. monocytogenes, S. typhi, P. aeruginosa, S. choleraesuis, B. subtilis, E. coli and S. aureus. El extracto hidroalcohólico de Kalanchoe daigremontiana a 400 mg mL-1 inhibió la eclosión de huevos de HC en un 99.5%, y redujo la motilidad del 85.2% de larvas L3 del mismo nematodo. Las concentraciones letales 50 y 90 para la inhibición de la eclosión fueron de 66.5 y 87.3 mg mL-1 y de 1.5 y 240.9 mg mL-1, para la inhibición de la motilidad. El extracto mostró actividad sobre bacterias Gram positivas y Gram negativas, determinándose una CMI de 100 mg mL−1 sobre P. aeruginosa y L. monocytogenes y 0.781 mg mL−1 para B. subtilis and S. aureus. Estos resultados indican que el extracto hidroalcohólico de Kalanchoe daigremontiana presenta potencial efecto antihelmíntico y antibacteriano y que podría ser utilizado como una estrategia de control biológico.

          Translated abstract

          ABSTRACT Five concentrations (200 to 12.5 mg mL -1) of Kalanchoe daigremontiana hydroalcoholic extract, were used to determine its anthelmintic and antibacterial effect in vitro. To determine the anthelmintic effect, eggs hatching inhibition, inhibition of motility and larval mortality tests were performed Haemonchus contortus (HC). The determination of the Minimum Inhibitory Concentration and Minimum Bactericidal Concentration allowed to evaluate the antibacterial activity of extract on L. monocytogenes, S. typhi, P. aeruginosa, S. choleraesuis, B. subtilis, E. coli and S. aureus. Kalanchoe daigremontiana hydroalcoholic extract inhibited the 99.5% of HC eggs hatching and reduced the motility of 85.2% of L3 larvae at 400 mg mL -1. The lethal concentrations 50 and 90 for the inhibition of hatching were 66.5 and 87.3 mg mL -1 and 1.5 and 240.9 mg mL -1, for the inhibition of motility. The extract showed activity on Gram positive and Gram-negative bacteria, determining a MIC of 100 mg mL -1 on P. aeruginosa and L. monocytogenes and 0.781 mg mL -1 for B. subtilis and S. aureus. These results indicate that the hydroalcoholic extract of Kalanchoe daigremontiana has a potential anthelmintic and antibacterial effect and that it could be used as a biological control strategy.

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          Studies of the in vitro anticancer, antimicrobial and antioxidant potentials of selected Yemeni medicinal plants from the island Soqotra

          Background Recent years have witnessed that there is a revival of interest in drug discovery from medicinal plants for the maintenance of health in all parts of the world. The aim of this work was to investigate 26 plants belonging to 17 families collected from a unique place in Yemen (Soqotra Island) for their in vitro anticancer, antimicrobial and antioxidant activities. Methods The 26 plants were extracted with methanol and hot water to yield 52 extracts. Evaluation for in vitro anticancer activity was done against three human cancer cell lines (A-427, 5637 and MCF-7) by using an established microtiter plate assay based on cellular staining with crystal violet. Antimicrobial activity was tested against three Gram-positive bacteria, two Gram-negative bacteria, one yeast species and three multiresistant Staphylococcus strains by using an agar diffusion method and the determination of MIC against three Gram-positive bacteria with the broth micro-dilution assay. Antioxidant activity was investigated by measuring the scavenging activity of the DPPH radical. Moreover, a phytochemical screening of the methanolic extracts was done. Results Notable cancer cell growth inhibition was observed for extracts from Ballochia atro-virgata, Eureiandra balfourii and Hypoestes pubescens, with IC50 values ranging between 0.8 and 8.2 μg/ml. The methanol extracts of Acanthospermum hispidum, Boswellia dioscorides, Boswellia socotrana, Commiphora ornifolia and Euphorbia socotrana also showed noticeable antiproliferative potency with IC50 values 15 mm and MIC values ≤ 250 μg/ml. In addition, the methanolic extracts of Acacia pennivenia, Boswellia dioscorides, Boswellia socotrana and Commiphora ornifolia showed good antioxidant potential at low concentrations (more than 80% at 50 μg/ml). Conclusion Our results show once again that medicinal plants can be promising sources of natural products with potential anticancer, antimicrobial and antioxidative activity. The results will guide the selection of some plant species for further pharmacological and phytochemical investigations.
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            Anti-tumor promoting activity of bufadienolides from Kalanchoe pinnata and K. daigremontiana x tubiflora.

            Five bufadienolides (1-5) isolated from the leaves of Kalanchoe pinnata and K. daigremontiana x tubiflora (Crassulaceae) were examined for their inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation in Raji cells induced by the tumor promoter, 12-O-tetradecanoylphorbol-13-acetate. All bufadienolides showed inhibitory activity, and bryophyllin A (1) exhibited the most marked inhibition (IC50 = 0.4 microM) among the tested compounds. Bryophyllin C (2), a reduction analogue of 1, and bersaldegenin-3-acetate (3) lacking the orthoacetate moiety were less active. These results strongly suggest that bufadienolides are potential cancer chemopreventive agents.
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              The antileishmanial activity assessment of unusual flavonoids from Kalanchoe pinnata.

              The importance of flavonoids for the antileishmanial activity of Kalanchoe pinnata was previously demonstrated by the isolation of quercitrin, a potent antileishmanial flavonoid. In the present study, the aqueous leaf extract from the medicinal plant K. pinnata (Crassulaceae) afforded a kaempferol di-glycoside, named kapinnatoside, identified as kaempferol 3-O-alpha-L-arabinopyranosyl (1-->2) alpha-L-rhamnopyranoside (1). In addition, two unusual flavonol and flavone glycosides already reported, quercetin 3-O-alpha-L-arabinopyranosyl (1-->2) alpha-L-rhamnopyranoside (2) and 4',5-dihydroxy-3',8-dimethoxyflavone 7-O-beta-D-glucopyranoside (3), have been isolated. Their structures were determined via analyses of mono and bi-dimensional (1)H and (13)C NMR spectroscopic experiments and HR-MALDI mass spectra. Because of its restricted occurrence and its abundance in K. pinnata, flavonoid (2) may be a chemical marker for this plant species of high therapeutic potential. The three flavonoids were tested separately against Leishmania amazonenis amastigotes in comparison with quercitrin, quercetin and afzelin. The quercetin aglycone - type structure, as well as a rhamnosyl unit linked at C-3, seem to be important for antileishmanial activity.
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                Author and article information

                Journal
                av
                Abanico veterinario
                Abanico vet
                Sergio Martínez González (Tepic, Nayarit, Mexico )
                2007-428X
                2448-6132
                December 2022
                : 12
                : 102
                Affiliations
                [1] orgnameUniversidad Autónoma del Estado de Hidalgo orgdiv1Instituto de Ciencias Agropecuarias Mexico
                [3] orgnameUniversidad Autónoma del Estado de Hidalgo orgdiv1Instituto de Ciencias Agropecuarias Mexico
                [2] orgnameUniversidad Autónoma del Estado de Hidalgo orgdiv1Instituto de Ciencias Agropecuaria Mexico
                Article
                S2448-61322022000100102 S2448-6132(22)01200000102
                10.21929/abavet2022.1
                35d18d30-1392-4d23-a259-514119286e22

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

                History
                : 10 February 2021
                : 13 December 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 40, Pages: 0
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                SciELO Mexico

                Categories
                Artículos originales

                Kalanchoe daigremontiana,hydroalcoholic extract,anthelmintic,antibacterial,antihelmíntico,antibacteriano,extracto hidroalcohólico

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