Penetração cutânea passiva e iontoforética de propionato de clobetasol incorporado em carreadores lipídicos nanoestruturados
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Data
2013-03-18
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Universidade Federal de Goiás
Resumo
Clobetasol propionate is one of the most potent topical corticosteroids usually available and has been established the use in treatment of various skin pathology. However its systemic absorption may cause serious side effects. The use of lipids nanocarriers and application of iontophoretic current shown potential to further controlled release of clobetasol propionate and increase their retention in the stratum corneum, thus making its management more effective and safe. In this study an analytical method was developed and validated for quantification of clobetasol propionate in nanocarriers and pig skin, used as model membranes in vitro permeation studies. Nanostructured lipid carriers (NLC) were obtained by dilution of microemulsion and chitosan-coated NLC (NLC-Ch) by the dripping of NLC in
chitosan solution. The developed nanocarriers were characterized to mean diameter,
polydispersity index, zeta potential, drug loading, recovery and encapsulation
efficiency. The in vitro release and permeation profile of clobetasol free and
nanoencapsulated was evaluated using Franz cells. The nanocariers obtained of 125
nm and uniform size distribution, whit PdI 0,25. The increase in size of NLC-Ch and
the inverting the value of zeta potential, suggest that there was a coating of the CLN
by chitosan, though interaction of charges. The NLC and NLC-Ch showed recovery
values greater than 80% and encapsulation efficiency than 90%. The release profile
of clobetasol from the developed formulations showed a controlled release with 35%
in 24 hours of study. The nanoenapsulation of clobetasol in the NLC-Ch and NLC
resulted in retention increased in the stratum corneum of 9.2 an 7.8 fold, respectively,
compared to free drug. The retention of the clobetasol in the stratum corneum was 4
and 2 times higher when electric current was applied to the formulation CLNQ,
compared to the free drug and encapsulated in NLC, respectively. The accumulation
of the drug in the stratum corneum, promoted by lipid carriers, shows that these
systems are effective for potential topical delivery to minimize the permeation of the
drug into the bloodstream and reduces the side effects.
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Silva, Luis Antônio Dantas - Penetração cutânea passiva e iontoforética de propionato de clobetasol incorporado em carreadores lipídicos nanoestruturados - 2013 - 40 f. - Dissertação - Programa de Pós-graduação em Ciências Farmacêuticas (FF) - Universidade Federal de Goiás - Goiânia - Goiás - Brasil.