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Background: One of the primary flavonoids found in the Glycyrrhiza glabra is called glabridin, which has anti-inflammatory, anti-bacterial, and antineoplastic effects. However, the insolubility of glabridin in water limits its application. Liposomes can increase the solubility of insoluble drugs and improve their bioavailability. Objectives: We examined the potential for the treatment of glabridin liposomes on histamine-induced atopic dermatitis. Materials and Methods: After GL treatment, histopathology, inflammatory cytokines, and atopic dermatitis-related proteins were used to evaluate the therapeutic effect of GL. Results: Glabridin liposomes alleviated histamine-induced scratching behavior; reduced mast cell proliferation, infiltration, and degranulation; and restrained the expression of associated pro-inflammatory cytokines. Additionally, glabridin liposomes restored nerve growth factor to normal levels and enhanced the expression of filaggrin to promote cuticle growth and repair skin damage caused by atopic dermatitis. Conclusion: Glabridin liposomes may relieve histamine-induced skin hypersensitivity and cortical hyperplasia by inhibiting the production of inflammatory cytokines, demonstrating their potential for the clinical treatment of atopic dermatitis. [ABSTRACT FROM AUTHOR]

Background: Glabridin is one of the main components of the isoflavonoids in Glycyrrhiza glabra and possesses anti-inflammatory, anti-bacterial, and anti-cancer effects. Objectives: Herein, the therapeutic effects and mechanisms of action of the glabridin liposome (GL) complex were studied in mice with imiquimod-induced psoriasis. Materials and Methods: After treatment with GLs, their effectiveness was assessed using parameters, such as Psoriasis Area and Severity Index (PASI) score, histopathology, inflammatory cytokines, and psoriasis-associated proteins. Results: The results demonstrated that GLs could significantly improve psoriatic symptoms, downregulate mast cell infiltration, and significantly reduce the PASI score of psoriatic mice. Quantitative reverse transcription polymerase chain reaction (RT-qPCR) results showed that GLs significantly decreased IL-23 and STAT3 mRNA expression. The results of immunohistochemistry and the enzyme-linked immunosorbent assay indicated that GLs decreased the expression of tumor necrosis factor-alpha (TNF-α), IL-17, and IL-22. Conclusion: GLs can alleviate psoriasis by inhibiting the expression of keratinocyte-activating proteins. These results suggest that GLs have great potential for the clinical treatment of psoriasis. [ABSTRACT FROM AUTHOR]