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Medeiros, Maria Alice Miranda Bezerra; Gama E Silva, Mariana; de Menezes Barbosa, Jackson; Martins de Lavor, Érica; Ribeiro, Tiago Feitosa; Macedo, Cícero André Ferreira; de Souza Duarte-Filho, Luiz Antonio Miranda; Feitosa, Thiala Alves; de Jesus Silva, Jussara; Fokoue, Harold Hilarion; Araújo, Cleônia Roberta Melo; de Assis Gonsalves, Arlan; Augusto de Araújo Ribeiro, Luciano; Almeida, Jackson Roberto Guedes da Silva
PloS one, 11/2021, Volume: 16, Issue: 11Journal Article
Pain and inflammation are unpleasant experiences that usually occur as a result of tissue damage. Despite the number of existing analgesic drugs, side effects limit their use, stimulating the search for new therapeutic agents. In this sense, five hydrazone derivatives (H1, H2, H3, H4, and H5), with general structure R1R2C = NNR3R4, were synthesized with molecular modification strategies. In this paper, we describe the ability of hydrazone derivatives to attenuate nociceptive behavior and the inflammatory response in mice. Antinociceptive activity was evaluated through acetic acid-induced writhing and formalin-induced nociception tests. In both experimental models, the hydrazone with the greatest potency (H5) significantly (p < 0.05) reduced nociceptive behavior. Additionally, methods of acute and chronic inflammation induced by different chemicals (carrageenan and histamine) were performed to evaluate the anti-inflammatory effect of H5. Moreover, molecular docking analysis revealed that H5 can block the COX-2 enzyme, reducing arachidonic acid metabolism and consequently decreasing the production of prostaglandins, which are important inflammatory mediators. H5 also changes locomotor activity. In summary, H5 exhibited relevant antinociceptive and anti-inflammatory potential and acted on several targets, making it a candidate for a new multi-target oral anti-inflammatory drug.
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