Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/200639
Type: Artigo de periódico
Title: Transdermal Delivery Of Butamben Using Elastic And Conventional Liposomes.
Author: Cereda, Cintia Maria Saia
Franz-Montan, Michelle
da Silva, Camila Morais Gonçalves
Casadei, Bruna Renata
Domingues, Cleyton Crepaldi
Tofoli, Giovana Radomille
de Araujo, Daniele Ribeiro
de Paula, Eneida
Abstract: Gel formulations containing the local anesthetic butamben (BTB) encapsulated in either conventional (BTBLUV) or elastic (BTBLUV-EL) liposomes were prepared and characterized, and then evaluated in terms of their skin permeability. Parameters measured included vesicle size and surface charge, BTB fluorescence anisotropy, encapsulation efficiency, partition coefficient and liposomal membrane organization. Encapsulation efficiencies and membrane/water partition coefficients were determined using a phase separation. The partition coefficients of the elastic and conventional formulations were 2025 ± 234 and 1136 ± 241, respectively. The sizes of the elastic and conventional liposomes did not change significantly (p > 0.05) following incorporation of the anesthetic. As expected, the elastic liposomes presented order parameters that were lower than those of the conventional liposomes, as determined by electron paramagnetic resonance with a 5-stearic acid nitroxide probe incorporated into the bilayer. After 8 h, the fluxes into the receiving solution (µg/cm(2)/h) were 6.95 ± 1.60 (10% BTB), 23.17 ± 6.09 (10% BTBLUV) and 29.93 ± 6.54 (10% BTBLUV-EL). The corresponding time lags (h) were 1.90 ± 0.48, 1.23 ± 0.28 and 1.57 ± 0.38, respectively. The permeability coefficients (10(-3 )cm/h) were 1.02 ± 0.23, 2.96 ± 0.77 and 4.14 ± 0.9, for 10% BTB, 10% BTBLUV and 10% BTBLUV-EL, respectively. The results demonstrate that anesthetic access through the skin can be considerably enhanced using liposomal gel formulations, compared to plain gel formulations.
Subject: Administration, Cutaneous
Anesthetics, Local
Animals
Benzocaine
Drug Compounding
Elasticity
Fluorescence Polarization
Gels
Liposomes
Particle Size
Reproducibility Of Results
Skin Absorption
Swine
Rights: fechado
Identifier DOI: 10.3109/08982104.2013.796975
Address: http://www.ncbi.nlm.nih.gov/pubmed/23697904
Date Issue: 2013
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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