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12-Acetoxyhawtriwaic acid lactone, a diterpene from Egletes viscosa, attenuates capsaicin-induced ear edema and hindpaw nociception in mice: possible mechanisms.

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The diterpene, 12-acetoxyhawtriwaic acid lactone (AHAL, tanabalin) isolated from the flower buds of Egletes viscosa Less. (Asteraceae) was evaluated on capsaicin-induced ear edema and hindpaw nociception in mice. AHAL (12.5, 25 and 50 mg/kg, P. O.) significantly attenuated the ear edema response to

Synthesis and evaluation of sesquiterpene lactone inhibitors of phospholipase A2 from Bothrops jararacussu.

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Several sesquiterpene lactone were synthesized and their inhibitive activities on phospholipase A(2) (PLA(2)) from Bothrops jararacussu venom were evaluated. Compounds Lac01 and Lac02 were efficient against PLA(2) edema-inducing, enzymatic and myotoxic activities and it reduces around 85% of

Artemisia annua L.: evidence of sesquiterpene lactones' fraction antinociceptive activity.

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BACKGROUND Artemisia annua L. has been used for many centuries in Chinese traditional medicine. Artemisinin, the active principle was first isolated and identified in the 1970s becoming the global back bone to the fight against malaria. Our research group previously developed an economic and

Sesquiterpene lactone from Wunderlichia crulsiana inhibits the respiratory burst of leukocytes triggered by distinct biochemical pathways.

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The sesquiterpene lactone tubiferin was chemically purified from the brazilian native plant Wunderlichia crulsiana and identified by NMR and GC/MS data. Its ability to inhibit the respiratory burst of peritoneal inflammatory polymorphonuclear leukocytes (PMN) stimulated upon addition of phorbol

Effects of FK224, a novel compound NK1 and NK2 receptor antagonist, on airway constriction and airway edema induced by neurokinins and sensory nerve stimulation in guinea pigs.

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FK224 (N-[N2-[N-[N-[N-[2,3-didehydro-N-methyl-N-[N-[3-(2- penthylphenyl)-propionyl]-L-threonyl]tyrosyl]-L-leucynyl]-D- phenylalanyl]-L-allo-threonyl]-L-asparaginyl]-L-serine-nu-lactone) is a novel neurokinin (NK) antagonist that exhibits selectivity for NK1 and NK2 receptors. The effects of FK224 on

Oxidative bioactivation of the lactol prodrug of a lactone cyclooxygenase-2 inhibitor.

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The lactol derivative of a lactone cyclooxygenase-2 inhibitor (DFU) was evaluated in vivo and in vitro for its potential suitability as a prodrug. DFU-lactol was found to be 10 to 20 times more soluble than DFU in a variety of aqueous vehicles. After administration of DFU-lactol at 20 mg kg-1 p.o.

Novel glucocorticoid antedrugs possessing a 17beta-(gamma-lactone) ring.

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The chemical synthesis and structure-activity relationships of a novel series of 17beta-glucocorticoid butyrolactones possessing either a 16alpha,17alpha-isopropylidene or -butylidene group are described. The sulfur-linked gamma-lactone group was incorporated onto the 17beta-position of the

Conformationally constrained analogues of diacylglycerol. 12. Ultrapotent protein kinase C ligands based on a chiral 4,4-disubstituted heptono-1,4-lactone template.

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Conformationally constrained analogues of diacylglycerol (DAG) built on a 5(-)[(acyloxy)methyl]-5-(hydroxymethyl)tetrahydro-2-furanone template (1, Chart 1) were shown previously to bind tightly to protein kinase C alpha (PK-C alpha) in a stereospecific manner. These compounds, however, racemized

Potential Anti-inflammatory Sesquiterpene Lactones from Eupatorium lindleyanum.

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Eupatorium lindleyanum has traditionally been used as folk medicine in Asian countries for its therapeutic effects on tracheitis and tonsillitis. Investigation of the anti-inflammatory active constituents from E. lindleyanum led to the isolation of two novel sesquiterpene lactones, named

Anti-inflammatory and antinociceptive effects of racemic goniothalamin, a styryl lactone.

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OBJECTIVE The present study aimed to further investigate the anti-inflammatory activity of goniothalamin (GTN), a styryl lactone, as well as its antinociceptive effects. METHODS The anti-inflammatory activity was evaluated in models of paw edema induced by different mediators in mice and

Pharmacological insight into the anti-inflammatory activity of sesquiterpene lactones from Neurolaena lobata (L.) R.Br. ex Cass.

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OBJECTIVE Neurolaena lobata is a Caribbean medicinal plant used for the treatment of several conditions including inflammation. Recent data regarding potent anti-inflammatory activity of the plant and isolated sesquiterpene lactones raised our interest in further pharmacological studies. The present

Lupane triterpenes with a δ-lactone at ring E, from Lippia mexicana.

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Three new lupane-type triterpenes, lippiolide (1), lippiolidolic acid (2), and lippiolic acid (3), were isolated from aerial parts of Lippia mexicana. Compounds 1 and 2 exhibited a δ-lactone at ring E. The known cycloartane triterpene 5 was also isolated. The structures of these compounds were

[Cerebral vascular protective effect of ginkgo diterpene lactone meglumine injection].

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The left middle cerebral artery occlusion (MCAO) model was made by inserting the nylon thread plug into the internal carotid artery. The behavioral score, cerebral infarction area, brain water content, ethidium bromide (EB) spillover, coagulation four indices, occludin and MMP-9 expression in brain

Mode of action of sesquiterpene lactones as anti-inflammatory agents.

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Sesquiterpene lactones containing an alpha-methylene-gamma-lactone moiety were shown to be potent inhibitors of carrageenan-induced edema and chronic adjuvant-induced arthritis in rodents at 2.5 mg/kg/day. The mode of action of sesquiterpene lactones as anti-inflammatory agents appeared to be at

The Pseudomonas aeruginosa quorum-sensing molecule N-(3-oxododecanoyl)homoserine lactone contributes to virulence and induces inflammation in vivo.

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Pseudomonas aeruginosa has two well-characterized quorum-sensing systems, Las and Rhl. These systems are composed of LuxR-type proteins, LasR and RhlR, and two acyl homoserine lactone (AHL) synthases, LasI and RhlI. LasI catalyzes the synthesis of N-(3-oxododecanoyl)homoserine lactone (3O-C12-HSL),

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