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Enhanced penetration and anti-psoriatic efficacy of curcumin by improved smartPearls technology with the addition of glycyrrhizic acid.

  • Nan Jin‎ et al.
  • International journal of pharmaceutics‎
  • 2020‎

smartPearls technology is one appropriate method to produce anti-psoriatic curcumin (Cur) topical delivery system. To prevent the sedimentation of loaded silica and release changing over the storage, which are disadvantages of smartPearls production, extra glycyrrhizic acid (GA) was added in classical smartPearls ingredients (active and porous material) to get an improved smartPearls production (Cur-GA-silica). The capacity of Cur-GA-silica to remain the gelation state after mixing with water was superior compared to that of the solid cluster without GA and that of the physical mixture of Cur, GA and silica. The Cur-GA-silica practically contained Cur with 1.68% ± 0.12% and showed significant difference with Cur raw drug powder in kinetic solubilities (4.55 ± 0.78 µg/mL vs 0 in 5 min; 3.26 ± 0.17 µg/mL vs 0 in 4 h) which was traceable to the amorphous state of Cur-GA-silica detected by X-ray diffractometer. With the amorphous Cur, two times as much penetrated Cur in Cur-GA-silica as in Cur raw drug powder was achieved on the imiquimod-induced psoriasis-like mice model. The anti-psoriatic efficacy of Cur-GA-silica was confirmed by Psoriasis Area and Severity Index (PASI) evaluation, histological evaluation and decreased IL-17A in the imiquimod-induced psoriasiform mouse skin analyzed by enzyme-linked immunosorbent assay. In conclusion, with the addition of GA, a stable amorphous curcumin topical vehicle fabricated by smartPearls technology without extra dermal matrix is available and facilitates penetration efficacy and anti-psoriatic capacity in imiquimod-induced psoriasiform mice.


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