Ortho-eugenol exhibits anti-nociceptive and anti-inflammatory activities.

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Fonseca DV, Salgado PR, Aragao Neto Hde C, Golzio AM, Caldas Filho MR, Melo CG, Leite FC, Piuvezam MR, Pordeus LC, Barbosa Filho JM, Almeida RN

Ortho-eugenol exhibits anti-nociceptive and anti-inflammatory activities.

Int Immunopharmacol. 2016 Sep;38:402-8. doi: 10.1016/j.intimp.2016.06.005. Epub 2016 Jun 27.

PubMed ID
27355133 [ View in PubMed
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Abstract

Ortho-eugenol is a much used phenylpropanoid whose ability to reduce pain and inflammation has never been studied. Researching ortho-eugenol's antinociceptive and anti-inflammatory activity, and its possible mechanisms of action is therefore of interest. The administration of vehicle, ortho-eugenol (50, 75 and 100mg/kg i.p.), morphine (6mg/kg, i.p.) or dexamethasone (2mg/kg, s.c.) occurred 30min before the completion of pharmacological tests. Pretreatment with ortho-eugenol did not change motor coordination test results, but reduced the number of writhes and licking times in the writhing test and glutamate test, respectively. The reaction time from thermal stimulus was significantly increased in the hot plate test after administration of ortho-eugenol. Treatment with yohimbine reversed the antinociceptive effect of ortho-eugenol, suggesting involvement of the adrenergic system. In anti-inflammatory tests, ortho-eugenol inhibited acetic acid induced vascular permeability and leukocyte migration, reducing TNF-alpha and IL-1beta by virtue of its suppression of NF-kappaB and p38 phosphorylated forms in the peritonitis test. From these results, ortho-eugenol antinociceptive effects mediated by the adrenergic system and anti-inflammatory activity through regulation of proinflammatory cytokines and phosphorylation of NF-kB and p38 become evident for the first time.

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