Combinatorial Approach of Thermosensitive Hydrogels and Solid Microneedles to Improve Transdermal Delivery of Valsartan: an In Vivo Proof of Concept Study.

Autor: Nirmayanti N; Faculty of Pharmacy, Hasanuddin University, Makassar, 90245, Indonesia., Alhidayah A; Faculty of Pharmacy, Hasanuddin University, Makassar, 90245, Indonesia., Usman JT; Faculty of Pharmacy, Hasanuddin University, Makassar, 90245, Indonesia., Nur JF; Faculty of Pharmacy, Hasanuddin University, Makassar, 90245, Indonesia., Amir MN; Faculty of Pharmacy, Hasanuddin University, Makassar, 90245, Indonesia., Permana AD; Faculty of Pharmacy, Hasanuddin University, Makassar, 90245, Indonesia. andi.dian.permana@farmasi.unhas.ac.id.
Jazyk: angličtina
Zdroj: AAPS PharmSciTech [AAPS PharmSciTech] 2022 Nov 29; Vol. 24 (1), pp. 5. Date of Electronic Publication: 2022 Nov 29.
DOI: 10.1208/s12249-022-02462-y
Abstrakt: Due to the limitations of oral administration of valsartan, in this study, we aimed to develop thermosensitive hydrogel for sustained transdermal delivery and improved bioavailability of valsartan, which was further improved using solid microneedles. The thermosensitive gel formula was made using Poloxamer 407 and Poloxamer 188 in various ratios. Valsartan thermosensitive gels were evaluated for their gelation temperature, pH values, drug content, spreadability, viscosity, rheological properties, in vitro drug release, in vitro permeation, and ex vivo permeation. Finally, in vivo study was conducted, compared to oral administration. The results presented the formulations showed required characteristic for transdermal administration with desired thermosensitive properties. Based on the permeation test with and without microneedles, it was found that the use of microneedles could affect the permeation of valsartan. Specifically, the increase of microneedles' needle length also increased valsartan permeation. The combination with the highest permeation was produced by 1.55 mm MNs with the amount of drug permeated of 2.27 ± 0.01 mg. Importantly, the transdermal delivery of valsartan using this combination approach could significantly improve the bioavailability of valsartan in in vivo study. The concentration of poloxamer was able to affect the properties of the hydrogels, and the use of solid microneedles improved the transdermal delivery of valsartan. In vivo studies showed the improvement of the bioavailability of valsartan compared to oral administration, showing the effectiveness of this combination approach.
(© 2022. The Author(s), under exclusive licence to American Association of Pharmaceutical Scientists.)
Databáze: MEDLINE
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