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15 résultats
Synthesis of 2-hydroxyacetyl-7-acetyl-xanthone, a new xanthone derivative endowed with antianaphylactic, analgesic, and antiinflammatory activities.
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2-Hydroxyacetyl-7-acetylxanthone (V), a new xanthone derivative, was synthesized in four steps starting from xanthene, by two synthetic approaches. The new compound displayed antianaphylactic activity in the PCA test and in the anaphylaxis shock test in rats. It also displayed analgesic activity in
Inhibitory effect of norathyriol, a xanthone from Tripterospermum lanceolatum, on cutaneous plasma extravasation.
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Norathyriol, a xanthone aglycon isolated from Tripterospermum lanceolatum, was demonstrated to reduce the plasma leakage elicited by the passive cutaneous anaphylactic reaction in normal as well as in adrenalectomized mice. Capsaicin pretreatment greatly suppressed the local edema caused by
Antinociceptive properties of the hydroalcoholic extract and preliminary study of a xanthone isolated from Polygala cyparissias (Polygalaceae).
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Polygala cyparissias (Polygalaceae) grows abundantly on Brazil's Atlantic coast, belonging to the typical underbrush vegetation of dunes and have been used in folk medicine for treatment of several diseases, such as disturbances of bowel and kidney. The hydroalcoholic extract of P. cyparissias (HE,
New xanthone derivatives as potent anti-inflammatory agents.
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A series of novel xanthone derivatives were synthesized as potential anti-inflammatory compounds. The compounds were examined for anti-inflammatory and analgesic properties. Aspirin and ketoprofen were used as reference compounds.
METHODS
Acute inflammation was induced by subplantar injection of 0.1
Synthesis and some biological properties of substituted xanthone-2-carboxylic acids.
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Xanthone-2-carboxylic acids 4a-4k were synthesized as potential antiphlogistic compounds, and compounds 4a-4c and 4f-4i were tested for anti-inflammatory and analgesic properties. In the carrageenin paw edema the most potent of the series acid 4b displayed the activity which was approx one third of
Xanthone-rich dichloromethane fraction of Securidaca inappendiculata, the possible antirheumatic material base with anti-inflammatory, analgesic, and immunodepressive effects.
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BACKGROUND
Securidaca inappendiculata Hassk. is an traditional Chinese medicine curing rheumatoid arthritis, but there is a lack of reports on material base research.
OBJECTIVE
To find the active fraction of S. inappendiculata contributing the most to antirheumatic activity.
METHODS
Prior to assays
Anti-inflammatory activity of mangostins from Garcinia mangostana.
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The fruit hull of Garcinia mangostana Linn (Guttiferae) is used as an anti-inflammatory drug in Southeast Asia. Two xanthones, alpha- and gamma-mangostins, were isolated from the fruit hull of G. mangostana, and both significantly inhibited nitric oxide (NO) and PGE(2) production from
Jacareubin inhibits FcεRI-induced extracellular calcium entry and production of reactive oxygen species required for anaphylactic degranulation of mast cells.
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Mast cells (MCs) are important effectors in allergic reactions since they produce a number of pre-formed and de novo synthesized pro-inflammatory compounds in response to the high affinity IgE receptor (FcεRI) crosslinking. IgE/Antigen-dependent degranulation and cytokine synthesis in MCs have been
Final report on the safety assessment of Hypericum perforatum extract and Hypericum perforatum oil.
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Hypericum Perforatum Extract is an extract of the capsules, flowers, leaves, and stem heads of Hypericum perforatum, commonly called St. John's Wort. Hypericum Perforatum Oil is the fixed oil from H. perforatum. Techniques for preparing Hypericum Perforatum Extract include crushing in stabilized
Protective anti-inflammatory activity of tovophyllin A against acute lung injury and its potential cytotoxicity to epithelial lung and breast carcinomas.
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Tovophyllin A (TA) is a xanthone isolated from Garcinia mangostana L. (GM, Guttiferae) pericarps that possesses various beneficial bioactivities. However, its protective effects on acute lung injury (ALI) and lung carcinoma have not yet been explored. The current work was designed to investigate the
Pharmacological and toxicological studies of Drimys angustifolia Miers. (Winteraceae).
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Drimys angustifolia Miers. (Winteraceae) is a Brazilian medicinal plant used as analgesic, antiulcer and anti-inflammatory without studies to assure its efficacy and safety Leaf and stem bark extracts were evaluated to determine the antiulcer, analgesic, antiinflammatory and antioxidant activities.
Analgesic and anti-inflammatory activities of the 2,8-dihydroxy-1,6-dimethoxyxanthone from Haploclathra paniculata (Mart) Benth (Guttiferae).
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In the present study, the pharmacological effects of 2,8-dihydroxy-1,6-dimethoxyxanthone from the bark of Haploclathra paniculata were investigated in mice using in vivo inflammation and nociception models. Acetic acid-induced writhing, paw licking induced by formalin, hot plate, and
Mangiferin protect myocardial insults through modulation of MAPK/TGF-β pathways.
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Mangiferin, a xanthone glycoside isolated from leaves of Mangifera indica (Anacardiaceae) is known to modulate many biological targets in inflammation and oxidative stress. The present study was designed to investigate whether mangiferin exerts protection against myocardial ischemia-reperfusion (IR)
Topical and systemic anti-inflammatory effects of Echinodorus macrophyllus (Kunth) Micheli (Alismataceae).
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Echinodorus macrophyllus leaf has been used in Brazilian folk medicine to treat inflammatory conditions and kidney dysfunctions. The present study evaluated the effects of leaf ethanolic extract from E. macrophyllus (EEEm) in acute and subchronic models of inflammation. The EEEm was found to cause
Nrf2/HO-1 mediates the neuroprotective effect of mangiferin on early brain injury after subarachnoid hemorrhage by attenuating mitochondria-related apoptosis and neuroinflammation.
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Early brain injury (EBI) is involved in the process of cerebral tissue damage caused by subarachnoid hemorrhage (SAH), and multiple mechanisms, such as apoptosis and inflammation, participate in its development. Mangiferin (MF), a natural C-glucoside xanthone, has been reported to exert beneficial
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