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Research Article Open Access
Calyptranthes restingae Sobral, known as “murta”, is a species of the northeastern Brazilian used to treat fever, pain and inflammatory disorders. The essential oil from Calyptranthes restingae Sobral (Myrtaceae) collected in Sergipe, northeastern Brazil, was obtained through the hydrodistillation and its antinociceptive properties were evaluated. Chromatographic analysis revealed 14 components, but only five were identified, accounting for 98.50% of the oil: (E)-caryophyllene (2.40%), calyptrantone (81.03%), α-humulene (1.52%), β-selinene (8.54%), α-selinene (5.01%). The structure of the major compound, calyptrantone, was elucidated by 1H and 13C-NMR. This is the first time that a β-triketone has been identified in the essential oil of Calyptranthes genus and that calyptrantone has been reported as a natural product. This essential oil showed an antinociceptive effect in mice, reducing acetic-acidinduced abdominal writhing significantly in comparison with the control group (p<0.001), with the possible participation of opioids. In the formalin test, the oil also caused significant inhibition of licking time in both phases without loss of motor coordination. Besides, all doses of the oil decreased the leukocyte migration in peritoneal cavity induced by carrageenan (p<0.01). Together, these results indicate that the essential oil of C. restingae represents an important potential tool for management of neurogenic and inflammatory pain.
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Author(s): Passos LO, Pina LTS, de Jesus AM, de Melo MS, Bispo RM, Alves PB, de Lima PCN, de Souza VRM, Silva GH, Júnior LJQ, Thomazzi SM, Martins LRR, Ferreira AG, de Souza AR, Machado SMF and Guimarães AG
Myrtaceae, Calyptranthes restingae, Î²-triketone, Calyptrantone, Pain, Inflammation, Aromatic Compounds, Aromatic Crops, Aromatic Flowers, Aromatic Plants, Aromatic Shrubs