Abstract:
:Valsartan (VLT) is a highly selective and orally active antihypertensive drug. However, its oral administration is associated with drawbacks like low bioavailability. The objective of this study was to design and develop a transdermal delivery system for VLT using ethosomal carriers to investigate their enhanced transdermal delivery potential. VLT ethosomes were prepared by cold method. VLT ethosomes were characterized by scanning electron microscopy. The prepared ethanolic liposomes were characterized to be spherical having low polydispersity of nano-size range with good entrapment efficiency. ETC5 ethosomal suspension with 4% of phospholipon 90H and 40% of ethanol was found to have highest entrapment efficiency, i.e. 80.230 ± 0.8748%. The permeation study of ethosomes was evaluated by ex vivo diffusion study through rat abdominal skin using Franz's diffusion cells and ETC5 ethosomal suspension was found to have highest permeation with flux of 92.819 ± 1.539 µg/cm²/h, when compared to the permeation profiles of drug solutions either in water or in a water-ethanol mixture. Transdermal application of ethosomal VLT on Wistar rats showed better and prolonged antihypertensive activity in comparison to orally administered VLT suspension by virtue of transdermal permeation through Wistar rat skin. Histopathological study of skin applied with ETC5 showed intercellular permeation across skin by dissolving intercellular lipids in epidermis without causing any rigorous changes in the skin cellular structure. In conclusion, ethosomes enabled the transdermal permeation of VLT, which amply proves its superiority over oral administration for antihypertensive treatment.
journal_name
J Liposome Resjournal_title
Journal of liposome researchauthors
Bhosale SS,Avachat AMdoi
10.3109/08982104.2012.753457subject
Has Abstractpub_date
2013-06-01 00:00:00pages
119-25issue
2eissn
0898-2104issn
1532-2394journal_volume
23pub_type
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