Development of finasteride proniosomes for transfollicular delivery

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Panikchar Wichayapreecha
Bancha Yingngam
Nattawut Charoenthai
Wandee Rungseevijitprapa

Abstract

Introduction: Transfollicular route is one of the most interesting and important routes for the treatment of skin conditions especially in hair loss, since the target organ of such diseases are located around this area. Moreover, delivery of drug through transfollicular route can reduce side effect. Currently, the U.S. Food and Drug Administration has approves finasteride as tablets used for the treatment of male pattern hair loss. Despite no finasteride available in topical dosage form. The purpose of this research was to develop finasteride proniosomes for transfollicular delivery that may give comparables efficacy to minoxidil solution and can reduce side effect of oral dosage form. Material and method: Finasteride proniosomes were prepared by coacervation phase separation method. In vitro drug release study was performed by dialysis test and transfollicular delivery of finasteride proniosomes was tested by follicular closing technique. Stability test was performed under controlled condition for 4 months.  Results: Release rate of finasteride proniosomes was released in a sustained release manner than that of finasteride solution (ethanol:phosphate buffer 1:1) due to the control release property of proniosmes. Finasteride proniosomes and finasteride solution could penetrated through transfollicular was 2.43 ± 0.63 µg/cm2 and 0.67 ± 0.91 µg/cm2, respectively. The low partition coefficient of finasteride and sebum produce in tranfollicular route that favour the transport of drug from proniosmes was better than that of the solution form. The percentage of encapsulation efficiency and drug loading capacity after stored for 4 months was 86% and 12%, respectively. Particles size was 300-340 nm with an average particle size distribution in the range 0.437±0.041 and was comparable to finasteride proniosomes freshly prepared (p> 0.05).  Conclusion: Development of finasteride proniosomes with particles size in rang 300-340 nm could be delivery through transfollicular route. The particles size and physical characterization of finasteride proniosomes remained stable for 4 months.

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