Antinociceptive and antiinflammatory activities of grandisin extracted from Virola surinamensis

Abstract

The antinociceptive and antiinflammatory properties of the neolignan, grandisin, isolated from Virola surinamensis (Myristicaceae) were investigated. Grandisin (GRA) is present in several plant species from Brazil used in popular medicine for the treatment of disorders such as colic, inflammation, rheumatism, dyspepsia and liver dysfunction. These studies demonstrated that GRA is able to inhibit the acetic acid-induced writhing in mice dose-dependently, and that this effect is not caused by motor incoordination or sedation due to depressant effect in the CNS. Through the formalin test the antiinflammatory activity of GRA was characterized, this substance reduced the time licking the paw by 60.5% (only in the second phase (inflammatory pain). This activity was also verified by the oil-induced ear oedema test, where GRA 10.0 mg/kg reduced the oedema by 36.4%. The results suggest that GRA has antinociceptive effects arising from antiinflammatory activity.

Triterpenes involved in the anti-inflammatory effect of ethanolic extract of Pterodon emarginatus Vogel stem bark

“…(modified by Carvalho [8]). The number of writhes produced in each group for the following 30 min was counted and the results were expressed as mean ± standard error of mean (SEM) J Nat Med (2012) 66: 202-207 203 in percentage of control group.…”

“…The same volume of acetone was applied to the left ear. Four hours after the treatment with the solution of croton oil, the mice were killed by cervical dislocation and a plug (6 mm in diameter) was taken from both ears with a punch (modified by Carvalho [8]). The inflammatory response (edema) was monitored by measuring the differences in weight (mg) between the two plugs (D).…”

Anti-inflammatory effect ofSpiranthera odoratissimaA. St.-Hil. leaves involves reduction of TNF-α

“…The reduction in chemotaxis is an important response observed in treatments using anti-inflammatory drugs (Carvalho et al, 2009). It is known that vascular permeability is related to cell migration, therefore, we evaluated the capillary permeability by Evan's blue method (Mendonc¸a & Coutinho-Nett, 2009).…”

Synthesis and Antitrypanosomastid Activity of 1,4-Diaryl-1,2,3-triazole Analogues of Neolignans Veraguensin, Grandisin and Machilin G

“…The residue purified by column chromatography on silica gel using hexane/ethyl acetate 8:2 as eluent. General procedure for the preparation of triazole derivatives (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) To a solution of terminal acetylenes 25a-d (2 mmol, 1.0 equiv) and azides 27a-d (2 mmol, 1.0 equiv) in dichloromethane (2 mL) and water (2 mL), were added CuSO 4 .5H 2 O pentahydrate (0.128 mmol, 0.064 equiv) and sodium ascorbate (0.352 mmol, 0.176 equiv). The reaction mixture was stirred for 24 h. Then was added a saturated solution of NH 4 Cl (30 mL) and the product was extracted with dichloromethane (3 × 20 mL).…”

“…10,12,13 Among natural products, our research group has focused on the tetrahydrofuran neolignans, a class that exhibits a great number of biological activities including antibacterial, antifungal, antitumor, and anti-inflammatory. [14][15][16][17][18][19][20][21][22][23] The neolignans veraguensin 1, grandisin 2, and machilin G 3 ( Figure 1) have shown antitrypanosomal and antileishmanial activities. [14][15][16][17][18][19][20][21][22][23] Studies on the antitrypanosomal activity of compounds 1-3 found maximum inhibitory concentration (IC 50 ) values of 2.3, 3.7 and 2.2 µM, respectively.…”