Topical Application of A New Herbal Complex, NI-01, Ameliorates House Dust Mite-Induced Atopic Dermatitis in NC/Nga Mice.

ABSTRACT: Atopic dermatitis (AD) is a chronic inflammatory skin disease characterized by pruritus and cutaneous dry skin. Here, we investigated whether topical application of NI-01 composed of six herbal medicines has a therapeutic effect on AD in vivo. Twelve marker compounds of NI-01 were analyzed by high-performance liquid chromatography with a photodiode array detector for quality control. To induce AD, house dust mite extract was applied to the shaved dorsal skin and ear surfaces of NC/Nga mice twice a week for 6 weeks. NI-01 (1, 2, or 4 mg/mouse) was applied daily to the site for experiment periods. The coefficient of determination of each compound showed good linearity (? 0.9999). The recovery rate of the 12 marker components was 96.77%-105.17%; intra and interday precision and repeatability were ? 1.40%. Topical application of NI-01 reduced house dust mite induced AD symptoms. The increased expressions of interleukin-4 and intercellular adhesion molecule-1 caused by house dust mites were markedly suppressed in NI-01-treated mice. Corticosterone levels significantly decreased, whereas serotonin levels increased with NI-01 application. These results suggest that NI-01 alleviates AD symptoms by inhibiting infiltration of inflammatory cells, thereby decreasing AD-related stress. NI-01 could be beneficial for the treatment of AD-like skin diseases.

SUBMITTER: Jin SE 

PROVIDER: S-EPMC7284439 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature