Hydroalcoholic extract of Urtica circularis: a neuropharmacological profile.

Context: The genus Urtica has been known since ancient times. It has known to be useful for the treatment of different human ailments.

Objective: The present work evaluated the neuropharmacological effects of a hydroalcoholic extract of Urtica circularis (Hicken) Sorarú (Urticaceae).

Artemisia copa aqueous extract as vasorelaxant and hypotensive agent.

Ethnopharmacological Relevance: Artemisia copa Phil. (Asteraceae) is a medicinal plant commonly used in traditional medicine in Argentina.

Aim Of The Study: The vasorelaxant and hypotensive activities of the aqueous extract of Artemisia copa have been investigated.

Antinociceptive activity of aqueous extract and isolated compounds of Lithrea molleoides.

Ethnopharmacological Relevance: Lithrea molleoides (Vell.) Engl. (Anacardiaceae) is a medicinal plant commonly used in traditional medicine in South America.

Spasmolytic activity of Artemisia copa aqueous extract and isolated compounds.

Artemisia copa Phil. (Compositae) is used in popular medicine as a digestive and for gastric pains. The effects of A.

Vicenin-2, a potential anti-inflammatory constituent of Urtica circularis.

Vicenin-2 (1), a flavonoid glycoside, was isolated and identified from an ethanol extract of the aerial parts of Urtica circularis. This crude extract was found to possess significant anti-inflammatory activity in a carrageenan-induced rat hind paw edema model (41.5% inhibition at a dose of 300 mg/kg; ip).

In vivo immunomodulatory effect of Tilia x viridis extracts on normal lymphocyte proliferation: a direct and an indirect action.

The flowers of Tilia species have been used in Europe for many years to treat colds, bronchitis, fever, inflammations and influenza. It is well known that lymphocytes play a role in acquired immunity related to pathogens and tumor cells attachment. The aim of this study was to determine the effect of an aqueous (AE) and a dichloromethane extract (DM) from Tilia x viridis which is widely used and distributed in Argentina, on normal murine lymphocyte proliferation after being administered to mice.

Psychopharmacological effects of Artemisia copa aqueous extract in mice.

Objective: To evaluate the aqueous extract from aerial parts of Artemisia copa Phil. (Asteraceae) administered orallyfor its psychopharmacological activities in several experimental models.

Methods: The extract was administered p.

Comparative antioxidant activity of an extract of Lithraea molleoides and an isolated 5-alkyl resorcinol derivative. Effects on the proliferation of normal and tumoral lymphocytes.

Lithraea molleoides (Vell.) Engl. (Anacardiaceae), is known in South America for its medicinal properties: antiarthritic, haemostatic, diuretic, tonic and useful for the treatment of respiratory diseases.

Evaluation of antinociceptive, antinflammatory activities and phytochemical analysis of aerial parts of Urtica urens L.

The antinociceptive and antiinflammatory activities of the ethanol extract of the aerial part of Urtica urens were determined by experimental animal models. U. urens extract was found to possess significant antinociceptive activity in chemically induced mouse pain models (ED₅₀ 39.

"In vivo" murine macrophages activation by a dichloromethane extract of Tilia x viridis.

Macrophages are involved in the host defense against infectious pathogens and tumors. Tilia species have been used in folk medicine for the treatment of infectious diseases, previously it was demonstrated that a dichloromethane (DM) extract possess antiproliferative action "in vitro" on a lymphoma cell line. The aim of this work was to study the "in vivo" effect of DM extract upon mice peritoneal macrophages.

Antiproliferative activity of Larrea divaricata Cav. on lymphoma cell line: participation of hydrogen peroxide in its action.

Larrea divaricata is a plant used in Argentina. The aim was to analyze the participation of H2O2 in the antiproliferative effect of L divaricata on BW5147 cells. Different studies were performed: proliferation, viability, nitrite production, apoptosis, oxygen reducing activity, NF-kappa B translocation, H2O2 production, H2O2 scavenging activity, and effect on exogenous superoxide dismutase.

Limonene exerts antiproliferative effects and increases nitric oxide levels on a lymphoma cell line by dual mechanism of the ERK pathway: relationship with oxidative stress.

D-limonene is a common monoterpene found in nature. Previously, it has been demonstrated that it has antiproliferative effects on a lymphoma cell line by increasing the nitric oxide (NO) level. In the present work this mechanism is analyzed by evaluating the participation of MAP38 and ERK pathways.

Modulatory effect of hydrogen peroxide on tumoral lymphocytes proliferation.

BW 5147 (murine lymphoma cell line). We analyzed the effect of H2O2 in cell proliferation testing nitric oxide and apoptosis. Enzymes involved in the regulation of H2O2 levels as superoxide dismutase (SOD) and peroxidase (PER) were analyzed.

Antioxidant activity of limonene on normal murine lymphocytes: relation to H2O2 modulation and cell proliferation.

Limonene is a monoterpene present in citrus fruit and is used as flavouring agents of foods. It was shown that monoterpenes possess antioxidant activity. Previously, it was demonstrated that limonene exerts anti-proliferative action on a lymphoma cell line without modifying normal lymphocyte viability.

Mechanism of the antiproliferative action of limonene on a lymphoma cell line: participation of nitric oxide. antiproliferative action of limonene on a lymphoma cell line.

Previously limonene demonstrated antiproliferative action on a lymphoma cell line (BW5147). The objective of this study was to investigate the mechanism of the antiproliferative action of limonene on BW 5147 cells. The induction of apoptosis and arrest in cell cycle phases, both phenomena related to nitric oxide (NO) production, was analyzed, as well as NO production.

Effect of caffeine on the secretion of peroxidase in rat submandibular gland: a study of its mechanism of action.

Objective: In this work, we analysed the mechanism of action of caffeine on peroxidase secretion in the female rat submandibular gland. The signaling molecules cAMP and nitric oxide were monitored as potential mediators.

Design: The salivary gland peroxidase secretion of female albino Wistar rats was assessed by a spectroscopic method.

Total polyphenol content and antioxidant capacity of commercially available tea (Camellia sinensis) in Argentina.

Tea, Camellia sinensis (L.) O. Kuntze (Theaceae) is cultivated in Argentina in the northeastern region (provinces of Misiones and Corrientes), between 26 degrees and 28 degrees south latitude, the southernmost area of the world where tea is cultivated.

Effect of Tilia x viridis flower extract on the proliferation of a lymphoma cell line and on normal murine lymphocytes: contribution of monoterpenes, especially limonene.

Tilia species are widely used in Europe as medicinal plants. The selective antiproliferative activity of a Tilia cordata flower dichloromethane extract (DME) on a lymphoma cell line has been reported previously and in order to extend this to other unstudied Tilia species, the effect of Tilia x viridis DME on the proliferation of tumor and normal murine lymphocytes was investigated. The bioguided fractionation of DME yielded a fraction rich in limonene (L), alpha-pinene and beta-pinene, which presented a selective antiproliferative action on tumor lymphocytes (EC(50) on tumor cells: 3.

Neuropharmacological activity of Eupatorium buniifolium aqueous extract in mice.

The aim of this study was to evaluate the neuropharmacological profile of the Eupatorium buniifolium aqueous extract (EB) in mice. EB at doses up to 1.5 g/kg p.

Effect of Ilex extracts and isolated compounds on peroxidase secretion of rat submandibulary glands.

Free radicals are involved in diverse disorders such as tumoral, central nervous system alterations, immunological and inflammatory pathologies. Peroxidase is an oral enzyme involved in the defense of the oral cavity. Ilex species such as Ilex paraguariensis St.

Induction of apoptosis on human hepatocarcinoma cell lines by an alkyl resorcinol isolated from Lithraea molleoides.

Aim: To study the mechanism of cytotoxicity of a new active 5-alkyl resorcinol [1, 3-dihydroxy-5- (tridec-4', 7'-dienyl) benzene] isolated from Lithraea molleoides leaves on liver tumor cells.

Methods: Human hepatocarcinoma cell lines (HepG2 and Hep3B) in culture were treated with inhibitory concentrations, 50% of the compound, for 24 h. The induction of apoptosis was detected in treated cells by analysis of DNA fragmentation, DNA content, and acridine orange and propidium iodide staining.

Comparative immunomodulatory effect of scopoletin on tumoral and normal lymphocytes.

Some coumarins possess enhancing effects on lymphocyte mitogen responsiveness. In this investigation, the activity of scopoletin, a coumarin that has been isolated from different plants and in this case specifically from T. cordata Mill.

Flavonoids from Artemisia copa with anti-inflammatory activity.

Bioactivity-guided fractionation of the dichloromethane and ethanol extracts from the aerial parts of Artemisia copa led to the isolation of the flavonoids spinacetin, jaceosidin, axillarin, penduletin, tricin and chrysoeriol. These compounds were studied for possible inhibitory activity on the generation of inflammatory mediators in a cell line of mouse macrophages (RAW 264.7) stimulated with lipopolysaccharide.

Tilia cordata Mill. Extracts and scopoletin (isolated compound): differential cell growth effects on lymphocytes.

Aqueous extracts or infusions obtained from the flowers of Tilia species are widely used for the treatment of anxiety in folk medicine. In this work, the antiproliferative action of aqueous, dichloromethane and ethanol extracts obtained from Tilia cordata Mill. flowers on tumoral (BW 5147 lymphoma) and normal lymphocytes is described.

In vitro antifungal assay of traditional Argentine medicinal plants.

Methanol extracts from 11 traditionally used Argentine medicinal plants were assayed in vitro for antifungal activity against yeasts, hialohyphomycetes as well as dermatophytes with the microbroth dilution method. Among them, the strongest effect was presented by Eupatorium buniifolium and Terminalia triflora, Trichophyton mentagrophytes and Trichophyton rubrum being the most susceptible species with MICs ranging from 100 to 250 microg/ml. Lithrea molleoides showed the broadest spectrum of action inhibiting all of the tested dermatophytes with MIC=250 microg/ml.