In Vivo Immunomodulatory, Cumulative Skin Irritation, Sensitization and Effect of d-Limonene on Permeation of 6-Mercaptopurine through Transdermal Drug Delivery(Biopharmacy)

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Using skin as a port for systemic drug administration, transdermal drug delivery has expanded greatly over the last two decades. Our aim was to formulate the single layer drug-in-adhesive transdermal patch for 6-mercaptopurine (6-MP). In vitro permeation study was carried out using modified Franz diffusion cell with and without of different concentration of d-limonene in human cadaver skin. In vivo immunomodulatory was carried out in mice, cumulative skin irritation, sensitization and patch adherence study was done in both mice and human subjects. 6-MP flux increased from 43±12.2μg/cm^2h (control) to 162.8±32.2μg/cm^2h (6% w/v d-limonene) data was significant (p<0.05), with decrease in the lag time to 35±9.3 min compared to control of 90±15.3min. In vivo immunomodulatory effect was shown in the Balb/c mice with 100μmol/kg/body wt of animal for 5d (one dose/d) of d-limonene. WBC count of 13469 cells/mm peak was observed on 12th day, bone marrow cells of 26.3×10^6 cells/femur and α-esterase positive cells of 1259±328.4 cells/4000 bone marrow cells. Cumulative skin irritation, sensitisation and patch adherence in animals and human subjects showed no skin irritation and sensitization. Patch adhesion was greater than 90.0% respectively in both human subjects and mice. The percentage of human subjects with adhesive residue was significantly less with scores of zero. d-Limonene proved as good chemical enhancer by increasing in the skin permeability with shortened the lag time. It proved that therapeutic amount of 6-MP can be delivered through transdermal drug delivery.
2008-04-01

In Vivo Immunomodulatory, Cumulative Skin Irritation, Sensitization and Effect of d-Limonene on Permeation of 6-Mercaptopurine through Transdermal Drug Delivery(Biopharmacy)

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