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|Type:||Artigo de periódico|
|Title:||Sufentanil-2-hydroxypropyl-β-cyclodextrin Inclusion Complex For Pain Treatment: Physicochemical, Cytotoxicity, And Pharmacological Evaluation|
de Paula E.
de Araujo D.R.
|Abstract:||Sufentanil (SUF) is a synthetic analgesic opioid widely used for the management of acute and chronic pain. This drug was complexed with 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) and the physicochemical characterization, in vitro/ex vivo toxicity assays, and pharmacological evaluation were performed. Differential scanning calorimetry, Fourier transform infrared spectroscopy (FTIR) analysis, and X-ray powder diffraction showed the formation and the morphology of the complex. Nuclear magnetic resonance afforded data regarding inclusion complex stoichiometry (1:1) with an association binding constant (Ka) value of 515.2 ± 1.2M-1 between SUF and HP-β-CD. Complexation with HP-β-CD protected SUF from light exposure and increased its photostability. Release kinetics revealed a decrease in SUF release rate (Krel = 7.05 ± 0.52 and 5.61 ± 0.39min-1/2 for SUF-HP-β-CD and SUF, respectively) and reduced hemolytic or myotoxic effects after complexation. Time course of tail-flick test showed that the duration of analgesia induced by SUF (150.0 ± 34.6min) was significantly increased (p < 0.001) after complexation with HP-β-CD (355.7 ± 47.2min) when injected at the same dose (1μg kg-1), prolonging the duration of analgesia after intramuscular administration and representing an alternative on the development of effective and safe drug-delivery system for opioid analgesics. © 2012 Wiley Periodicals, Inc.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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