Pharmacodynamic study of eprosartan mesylate-loaded transfersomes Carbopol® gel under Dermaroller® on rats with methyl prednisolone acetate-induced hypertension

Abstract

The objective of present study was to prepare eprosartan mesylate (EM)-loaded transfersomes Carbopol^® gel and characterized for various parameters, including in vitro skin permeation, in vivo antihypertensive study, skin irritation, and histological study. Furthermore, effect of transfersomes gel on angiotensin II type-1 receptor (AT₁R) mRNA and protein expressions on smooth vascular muscles of aorta was determined by real-time polymerase chain reaction (RT-PCR) and western blot analysis. The physical evaluation parameters were detected to be in correspondence with reference marketed gel formulation. The transdermal flux, permeability coefficient, and T_lag of EM from transfersomes gel were found to be 26.76 ± 1.66μg/cm²/h, 8.93 ± 0.55 ×10^-3 cm/h, and 2.17 ± 0.29h, respectively, across rat skin pretreated with microneedle (Dermaroller^®). Pharmacodynamic study showed prolonged and better management of hypertension after the application of transfersomes gel in experimentally induced hypertensive Wistar rats as compared with oral control formulation. The in vivo angiotensin II type-1 blocking efficacy of prepared transfersomes gel and control formulation was also supported with RT-PCR and western blot analysis of AT₁R mRNA and protein expressions on smooth vascular muscles of aorta. Skin irritation and skin histological assessment showed that the prepared transfersomes Carbopol^® gel was safe to be used for transdermal route. It is concluded that the incorporation of transfersomes into gel formulation offered enhanced skin contact, ease of application, and found to be a suitable drug reservoir for the transdermal delivery of EM for the management of hypertension in Wistar rats.

Keywords: Antihypertensive activity; Carbopol(®) gel; Eprosartan mesylate; Skin irritation; Transfersomes; Western blot.