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Homologous Canavalia lectins elicit different patterns of antinociceptive responses
Nilson Vieira Pinto1, Cláudia Ferreira Santos1, Benildo Sousa Cavada2
1Instituto Superior de Ciências Biomédicas, Universidade Estadual do Cearcá, Av. Paranjana 1700, 60.740-000, Fortaleza-CE-Brasil.
Abstract:
Canavalia gladiata (CGL), C. maritima (ConM) and C. brasiliensis (ConBr) lectins were evaluated in nociception models. ConBr inhibited first (32%) and second (100%) phases of the formalin test; CGL inhibited only the first (74%) and ConM only the second (59%) phase. Hypernociception evaluated in the Von Frey test was inhibited by ConM (55%), CGL (41%) and ConBr (38%). Acetic acid-induced abdominal writhing was reduced by ConBr (66%), CGL (52%) and ConM (60%). ConBr and CGL effects were reversed by the lectin association with its ligand sugar. The antinociceptive activity of the structural homologous lectins was differentiated by potency, efficacy and mechanisms.
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