Ilex Paraguariensis

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Grace Gosmann - One of the best experts on this subject based on the ideXlab platform.

  • Extracts of the unripe fruit of Ilex Paraguariensis as a potential chemical control against the golden apple snail Pomacea canaliculata (Gastropoda, Ampullariidae).
    Natural Product Research, 2018
    Co-Authors: Fabiano Carvalho De Brito, Grace Gosmann, Guendalina Turcato Oliveira
    Abstract:

    AbstractPlant extracts can provide a viable alternative to controlling many crop pests. This study sought to assess the efficacy of vegetable extracts of the unripe fruits of Ilex Paraguariensis (y...

  • Extracts of the unripe fruit of Ilex Paraguariensis as a potential chemical control against the golden apple snail Pomacea canaliculata (Gastropoda, Ampullariidae).
    Natural product research, 2018
    Co-Authors: Fabiano Carvalho De Brito, Grace Gosmann, Guendalina Turcato Oliveira
    Abstract:

    Plant extracts can provide a viable alternative to controlling many crop pests. This study sought to assess the efficacy of vegetable extracts of the unripe fruits of Ilex Paraguariensis (yerba mat...

  • evaluation of ursolic acid isolated from Ilex Paraguariensis and derivatives on aromatase inhibition
    European Journal of Medicinal Chemistry, 2008
    Co-Authors: Simone Cristina Baggio Gnoatto, Grace Gosmann, Sophie Da Nascimento, Philippe Galéra, Karim Boumediene, Pascal Sonnet, Alexandra Dassonvilleklimpt, Safa Moslemi
    Abstract:

    Abstract The inhibitory potency of ursolic acid extracted from Ilex Paraguariensis, a plant used in South American population for a tea preparation known as mate, and its derivatives to inhibit aromatase activity was assessed and compared to a phytoestrogen apigenin and a steroidal aromatase inhibitor 4-hyroxyandrostenedione (4-OHA). Among all compounds tested only ursolic acid 1 showed an efficient and dose-dependent aromatase inhibition with IC50 value of 32 μM as did apigenin (IC50 = 10 μM), whereas IC50 value of 4-OHA was 0.8 μM. Our results show that the incorporation of a metallocene moiety into the ursolic acid derivatives decreases the aromatase inhibition. Moreover, comparison of the structure/inhibitory potency relationship of compounds indicates that the presence of cycle A and the configuration of C3-OH and C17-COOH seems to be more favourable to recognize the active site of aromatase and to block its activity.

  • Evaluation of ursolic acid isolated from Ilex Paraguariensis and derivatives on aromatase inhibition.
    European journal of medicinal chemistry, 2007
    Co-Authors: Simone Cristina Baggio Gnoatto, Grace Gosmann, Alexandra Dassonville-klimpt, Sophie Da Nascimento, Philippe Galéra, Karim Boumediene, Pascal Sonnet, Safa Moslemi
    Abstract:

    The inhibitory potency of ursolic acid extracted from Ilex Paraguariensis, a plant used in South American population for a tea preparation known as maté, and its derivatives to inhibit aromatase activity was assessed and compared to a phytoestrogen apigenin and a steroidal aromatase inhibitor 4-hyroxyandrostenedione (4-OHA). Among all compounds tested only ursolic acid 1 showed an efficient and dose-dependent aromatase inhibition with IC50 value of 32 microM as did apigenin (IC50=10 microM), whereas IC50 value of 4-OHA was 0.8 microM. Our results show that the incorporation of a metallocene moiety into the ursolic acid derivatives decreases the aromatase inhibition. Moreover, comparison of the structure/inhibitory potency relationship of compounds indicates that the presence of cycle A and the configuration of C3-OH and C17-COOH seems to be more favourable to recognize the active site of aromatase and to block its activity.

  • Saponins from Ilex dumosa, an Erva-maté (Ilex Paraguariensis) Adulterating Plant
    Journal of Agricultural and Food Chemistry, 1997
    Co-Authors: Viviane Silva Pires, Grace Gosmann, Dominique Guillaume, Eloir Paulo Schenkel
    Abstract:

    Extraction of Ilex dumosa leaves, a material frequently used for the adulteration of erva-mate, resulted in the isolation of 3-O-β-d-glucuronopyranosyl-28-O-β-d-glucopyranosyl-3β-hydroxyolean-12-en-28-oic acid, 3-O-β-d-6-O-methylglucuronopyranosyl-28-O-β-d-glucopyranosyl-3β-hydroxyolean-12-en-28-oic acid, and three new saponins:  3-O-[β-d-glucopyranosyl-(1−2)-β-d-galactopyranosyl]-28-O-β-d-glucopyranosyl-3β,29-dihydroxyolean-12-en-28-oic acid, 3-O-[α-l-arabinopyranosyl-(1−2)-α-l-arabinopyranosyl]-28-O-β-d-glucopyranosyl-3β-hydroxyolean-12-en-28-oic acid, 3-O-β-d-galactopyranosyl-28-O-β-d-glucopyranosyl-3β-hydroxyolean-12-en-28-oic acid. None of these saponins are present in the leaves of Ilex Paraguariensis (genuine erva-mate). Keywords: Ilex Paraguariensis; Ilex dumosa; erva-mate; saponins

Eloir Paulo Schenkel - One of the best experts on this subject based on the ideXlab platform.

  • Influência do método de extração nos teores de metilxantinas em erva-mate (Ilex Paraguariensis a. St.-Hil., aquifoliaceae)
    Química Nova, 2007
    Co-Authors: Simone Cristina Baggio Gnoatto, Valquiria Linck Bassani, Geraldo Ceni Coelho, Eloir Paulo Schenkel
    Abstract:

    Ilex Paraguariensis A. St. -Hil. is a native species of southern South America. The caffeine content in Ilex Paraguariensis leaves has been considered an important quality parameter for maté-derived products. In this work different extraction methods for the determination of these methylxantines are compared. The influence of the extraction conditions on the methylxanthine yields was evaluated. Extraction by decoction with acidic aqueous solution (H2SO4 4N) presented the higher efficiency in the theobromine extraction. The extraction in a Soxhlet with acidic aqueous solution and decoction with acidic aqueous solution showed the highest caffeine yield. For the concomitant theobromine and caffeine quantification, the decoction with acidic aqueous solution is suggested

  • Effect of light intensity on methylxanthine contents of Ilex Paraguariensis A. St. Hil
    Biochemical Systematics and Ecology, 2007
    Co-Authors: Geraldo Ceni Coelho, Renato Antonio Dedecek, Marcos Fernando Gluck Rachwal, Gustavo Ribas Curcio, Klaus Nietsche, Eloir Paulo Schenkel
    Abstract:

    Mate (Ilex Paraguariensis A. St. Hil.) is a shade-tolerant species, frequently cultivated on agroforestry systems or even in monoculture. Secondary metabolism of mate includes the methylxanthines, caffeine and theobromine. Shading could alter the quantitative profile of these compounds in the plant, and since the secondary chemistry of mate is decisive to determine the quality of raw material, the caffeine and theobromine content under different light intensities were investigated. Artificial shading obtained by a nylon screen and natural shading produced by other trees were tested. Methylxanthines content was increased with the reduction of light, but only in the low light intensity treatment. A negative correlation was found between biomass accumulation and methylxanthines content. But the total methylxanthines yield per plant was not altered.

  • HPLC method to assay total saponins in Ilex Paraguariensis aqueous extract
    Journal of the Brazilian Chemical Society, 2005
    Co-Authors: Simone Cristina Baggio Gnoatto, Eloir Paulo Schenkel, Valquiria Linck Bassani
    Abstract:

    Ilex Paraguariensis St. Hilaire is a South American tree from which leaves and twigs are used to prepare a commonly consumed tea in several South American countries. The plant is known as “erva-mate” in Portuguese or “yerba mate” in Spanish. Considering the potential use of the saponins as surfactant as well as its therapeutic potential, the present work was designed to propose extraction and quantitation methods for the saponins present in Ilex Paraguariensis. The saponins were extracted by decoction, hydrolyzed and quantified by a HPLC method with UV detection. The saponins concentration was expressed in ursolic acid (total saponins). The method showed linearity for ursolic acid in the range of 13.5 to 135 µg mL -1 . The aqueous extract presented total saponins concentration of 352 µg mL -1 . The results also suggest the possibility of use of similar method for assaying triterpenoid saponins in other plants.

  • Triterpenes and triterpenoidal glycosides from the fruits of Ilex Paraguariensis (Maté)
    Journal of the Brazilian Chemical Society, 2004
    Co-Authors: Alexandre Toshirrico Cardoso Taketa, Eberhard Breitmaier, Eloir Paulo Schenkel
    Abstract:

    A new triterpenoid glycoside, 3b-O-a-L-arabinopyranosyl rotundic acid, named here mateside (4), and the known triterpenes ursolic acid (1), acetylursolic acid (2), 23-hydroxyursolic acid (3), the saponins ziyu-glycoside I (5) and Ilexoside II (6), were isolated from fruits of Ilex Paraguariensis. Their structures were established on the basis of 1D and 2D NMR spectroscopic methods. The threshold bitterness values for mateside and Ilexoside II were also determined and compared with saponins obtained from leaves of I. Paraguariensis and other Ilex species. The high bitterness of Ilexoside II, one of the main saponins found the fruits, but not in the leaves of I. Paraguariensis, suggests that the utilization of the fruits in the Mate production can produce a strong taste variation and unknown physiological effects.

  • Caffeine and theobromine in epicuticular wax of Ilex Paraguariensis A. St.-Hil.
    Phytochemistry, 2000
    Co-Authors: Margareth Linde Athayde, Geraldo Ceni Coelho, Eloir Paulo Schenkel
    Abstract:

    Caffeine and theobromine were identified and quantified in leaf epicuticular waxes of Ilex Paraguariensis A. St.-Hil. (Aquifoliaceae). The total epicuticular leaf wax content was ca. 0.5% on average of dry leaf weight. Epicuticular caffeine and theobromine contents varied from 0.16 to 127.6 microg/mg and from 0 to 9.5 microg/mg of wax, respectively. For some selected samples, the intracellular methylxanthine concentration was also determined. A positive correlation was found between inner and epicuticular caffeine contents.

Guendalina Turcato Oliveira - One of the best experts on this subject based on the ideXlab platform.

Rosana Filip - One of the best experts on this subject based on the ideXlab platform.

  • Supercritical fluid extraction of alkaloids from Ilex Paraguariensis St. Hil.
    Journal of Food Engineering, 2010
    Co-Authors: Eduardo Cassel, Graciela Ferraro, Rubem Mário Figueiró Vargas, Gerti Weber Brun, Diego Erthal Almeida, Laura Cogoi, Rosana Filip
    Abstract:

    Abstract In this work a study about extracts obtained from Ilex Paraguariensis St. Hil. leaves with supercritical CO2 was carried out. Experiments were performed in a pilot-scale extractor with capacity of 1 L at pressure of 120, 150, 170 and 200 bar for four temperature conditions, 313.15, 323.15, 333.15 and 343.15 K. The experimental data were fitted using a mathematical model characterized by the existence of two distinct periods of extraction. Numerical results for the adjusted parameters correlated very well the supercritical extraction experimental data. The confidence of results obtained from mathematical model and experiments was assured through the chi-square test.

  • Antifungal activity of the aqueous extract of Ilex Paraguariensis against Malassezia furfur.
    Phytotherapy research : PTR, 2009
    Co-Authors: Rosana Filip, Roberto Davicino, Claudia Anesini
    Abstract:

    Malassezia furfur is a lipodependent, dimorphic and saprophyte fungus which causes pityriasis versicolor, dandruff and seborrheic dermatitis in humans. The drugs available to treat this fungal infection are few. These drugs are highly toxic and are costly when used in prolonged treatments. For these reasons, it is necessary to find new compounds to treat these infections. Ilex Paraguariensis St Hilaire is a plant that grows in Argentina, Brazil and Paraguay. The aim of this study was to evaluate the effect of the aqueous extract of Ilex Paraguariensis on the growth of M. furfur. High performance liquid chromatography (HPLC) was employed to identify and isolate compounds of I. Paraguariensis and the agar-well diffusion method was used to assess the antifungal activity of the extract. The fungicidal/fungistatic effect was evaluated by the modified Thompson assay. The results demonstrated that the aqueous extract of Ilex Paraguariensis (1000 mg/ml) possesses inhibitory activity against M. furfur. This antimalassezial activity was equivalent to 2.7 microg/ml of ketoconazole. Therefore, the topical use of Ilex Paraguariensis extract as alternative antifungal agent can be suggested.

  • peroxidase like activity of Ilex Paraguariensis
    Food Chemistry, 2006
    Co-Authors: Claudia Anesini, Graciela Ferraro, Rosana Filip
    Abstract:

    Abstract Ilex Paraguariensis St. Hil. (Aquifoliaceae) is widely exploited in northeastern Argentina, southern Brasil and eastern Paraguay. The commercial product named “Mate” or “Yerba Mate” is used to prepare a tea like beverage (infusions or decoctions). Reactive oxygen species (ROS) are well known to have an active role in different disorders such as rheumatoid arthritis, diabetes mellitus, vascular, neurodegenerative and periodontal disease. Normally, enzymes such as peroxidases, superoxide dismutase and catalase eliminate ROS. In this study, the peroxidase-like activity of aqueous extracts from I. Paraguariensis and I. Paraguariensis commercial sample “Yerba Mate” was determined. Caffeoyl derivatives (chlorogenic and caffeic acid) and total polyphenols content were determined in order to establish a relationship between their content and their peroxidase activity. Both aqueous extracts showed peroxidase-like activity, but I. Paraguariensis was significantly more active than “Yerba Mate”. The antioxidant activity expressed as peroxidase-like activity was evidently related to total polyphenol content.

Fabiano Carvalho De Brito - One of the best experts on this subject based on the ideXlab platform.

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