Anti-inflammatory effect of an adhesive resin containing indomethacin-loaded nanocapsules

Publication date: December 2017
Source:Archives of Oral Biology, Volume 84
Author(s): Bruna Genari, Maria Beatriz Cardoso Ferreira, Liciane Fernandes Medeiros, Joice Soares de Freitas, Stefania Giotti Cioato, Iraci Lucena da Silva Torres, Adriana Raffin Pohlmann, Silvia Stanisçuaski Guterres, Vicente Castelo Branco Leitune, Fabrício Mezzomo Collares, Susana Maria Werner Samuel
ObjectiveTo analyze the anti-inflammatory and analgesic effects of an adhesive resin containing indomethacin-loaded nanocapsules in rat model.DesignAdhesive resin disks with or without indomethacin-loaded nanocapsules were subcutaneously implanted into right hind paw of rats. A week after surgical procedure, 2% formalin solution was intradermally injected into plantar surface of paw. Nociceptive and inflammatory responses were evaluated by formalin test. Paw edema by pletismometer and mechanical hyperalgesia by von Frey test were performed on day 2, day 4, day 6, day 8, day 10 and day 12 after surgery. IL-6, IL-10, and lactate dehydrogenase (LDH) serum levels were determined by ELISA-sandwich test.ResultsGroup containing indomethacin-loaded nanocapsules (NC) presented lower edema in the right hind paw at 24h after formalin injection than those of the control group (CT) (P<0.01). NC group showed decrease in the nociceptive response in phase I (neurogenic pain) compared to CT group (NC − 66.86±22.83s X CT − 130.17±35.83s, P<0.001). NC group presented supporting higher intensity of stimulus on days 8 and 12 (24h and 72h after formalin injection) (P<0.01 and P<0.02 respectively). The IL-6 serum level was also significantly higher in the NC group than CT group (p<0.001).ConclusionsThese results indicate that an adhesive resin containing indomethacin-loaded nanocapsules has anti-inflammatory and nociceptive activities in a chemical model of acute inflammation. The present investigation confirms an adhesive resin with drug-loaded nanocapsules may be useful for improving therapeutic effect for adhesives to be used in deep cavities.



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