QIN Yeping, DAI Dan, XIAO Xue, SONG Ping
Journal of Jiangsu University(Medicine Edition).
2023, 33(02):
118-125.
Objective： To investigate the effects of Kaixuan-Jiedu decoction (KXJD) on psoriasis-like mice model and its regulation of S1P. Methods： Twenty-five BALB/c mice were randomly and equally divided into normal group, model group, methotrexate group, KXJD-M and KXJD-H group. In addition to the normal group, the psoriasislike mice model were established by external application of imiquimod in other groups, and samples were taken after 7 days of continuous intervention. During the period, the skin lesions were photographed and the psoriasis area and severity index (PASI) score was calculated; HE staining was used to observe the pathological changes of skin lesions and measure the thickness of epidermis; the spleen and thymus were photographed and weighed; the expression of Ki67 and S1P in epidermis was detected by immunohistochemistry; Western blotting assay was used to detect the expression of KRT17, Claudin and Occludin in skin lesions; the mRNA levels of IL-17, IL-23 and S1PRs were detected by qRT-PCR. Results： Compared with the model group, KXJD could alleviate the psoriatic skin lesions, reduce the PASI score and epidermal hyperplasia (both P<0.01), improve the index of thymus and spleen and vascular proliferation (P<0.01 or P<0.05), reduce the mRNA expression of inflammatory factors IL-17 and IL-23 (P<0.01), and repair the skin barrier (P<0.05). Meanwhile, KXJD could downregulate the expression of S1P and S1PRs mRNA in epidermis (P<0.05). Conclusion： KXJD could alleviate the symptoms of local skin lesions in psoriasis, and its possible mechanism may be related with the regulation of S1P.
