Abstract
Objective
To determine the role of Tripterygium wilfordii multiglycoside (TGW) in the treatment of psoriatic dermatitis from a cellular immunological perspective.
Methods
Mouse models of psoriatic dermatitis were established by imiquimod (IMQ). Twelve male BALB/c mice were assigned to IMQ or IMQ+TGW groups according to a random number table. Histopathological changes in vivo were assessed by hematoxylin and eosin staining. Ratios of immune cells and cytokines in mice, as well as PAM212 cell proliferation in vitro were assessed by flow cytometry. Pro-inflammatory cytokine expression was determined using reverse transcription quantitative polymerase chain reaction.
Results
TGW significantly ameliorated the severity of IMQ-induced psoriasis-like mouse skin lesions and restrained the activation of CD45+ cells, neutrophils and T lymphocytes (all P<0.01). Moreover, TGW significantly attenuated keratinocytes (KCs) proliferation and downregulated the mRNA levels of inflammatory cytokines including interleukin (IL)-17A, IL-23, tumor necrosis factor α, and chemokine (C-X-C motif) ligand 1 (P<0.01 or P<0.05). Furthermore, it reduced the number of γ δ T17 cells in skin lesion of mice and draining lymph nodes (P<0.01).
Conclusions
TGW improved psoriasis-like inflammation by inhibiting KCs proliferation, as well as the associated immune cells and cytokine expression. It inhibited IL-17 secretion from γ δ T cells, which improved the immune-inflammatory microenvironment of psoriasis.
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Zhang S contributed to validation, formal analysis and wrote original draft. Zhang S, Li HJ, Liu L and Sun XY carried out the experiments. Li HJ contributed to methodology and visualization of study. Yang CM, Wang J, Yan G and Zhou YQ performed formal analysis. Sun XY and Miao X performed validation. Lu Y and Hu MQ contributed to visualization. Liu L, Chen ST and Li X contributed to review and editing of manuscript. Li X was responsible for resources and funding acquisition. Li B contributed to conceptualization, resources, and project administration. All authors have read and approved the final manuscript.
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Supported by the National Natural Science Foundation of China (Nos. 81973860, 82074427), Shanghai Pujiang Talent Program (No. 2020PJD067), and Science and Technology Commission of Shanghai Municipality (Nos. 21Y21920100, 21Y21920102)
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Zhang, S., Li, Hj., Yang, Cm. et al. Inflammatory and Immunomodulatory Effects of Tripterygium wilfordii Multiglycoside in Mouse Models of Psoriasis Keratinocytes. Chin. J. Integr. Med. 30, 222–229 (2024). https://doi.org/10.1007/s11655-023-3599-y
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DOI: https://doi.org/10.1007/s11655-023-3599-y