Abstract
Purpose
It has been suggested thatSairei-to (TJ114), a traditional Japanese herbal medicine, has immunomodulatory activities. To evaluate the effects of TJ114 on uveitis, we examined the effectiveness of oral administration in a murine model of experimental autoimmune uveitis (EAU).
Methods
Murine EAU was induced by subcutaneous injection of human inter-photoreceptor retinoid-binding protein (IRBP) peptide mixed with complete Freund’s adjuvant. In the TJ114-treated group, 2 g/kg was administrated orally from 0 to 20 days after immunization. Clinical scoring, histopathological scoring of EAU, cell proliferation, cytokine assessment, and adoptive transfer experiment of splenic T cells into naïve mice were performed.
Results
EAU development occurred in 32 of 38 mice (86 %) in the untreated group and 12 of 33 (36 %) in the TJ114-treated group. The clinical scores for EAU in the vehicle-treated and TJ114-treated groups were 1.56 ± 1.65 and 0.59 ± 0.63 respectively, at 14 days after immunization (p < 0.01, Mann–Whitney U-test), and 2.26 ± 1.56 and 0.75 ± 1.31 respectively at 21 days (p < 0.001, Mann–Whitney U-test), while the histopathological scores at 21 days were 1.47 ± 1.42 and 0.54 ± 0.84 respectively (p < 0.01, Mann–Whitney U-test). Interferon (IFN)-γ and tumor necrosis factor (TNF)-α production by cervical lymph node cells obtained from the TJ114-treated group were significantly reduced as compared with those from the vehicle-treated group (p < 0.01, Student’s unpaired t-test). Moreover, the levels of C-C motif chemokine 2 (CCL2) and IFN-γ were significantly reduced in splenocytes of TJ114-treated mice as compared with the vehicle-treated group (p < 0.01, Student’s unpaired t-test). Mice that received adoptive transfer of splenic T cells from TJ114-treated EAU mice caused significantly lower severity of EAU compared to those that received from vehicle-treated EAU mice.
Conclusion
Oral administration of TJ114 has an inhibitory effect on a murine model of EAU, possibly via reduction in cytokine production by helper type-1 T cells.
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Kaburaki, T., Zhang, Q., Jin, X. et al. Effects of Japanese herbal medicine Sairei-to on murine experimental autoimmune uveitis. Graefes Arch Clin Exp Ophthalmol 251, 2733–2739 (2013). https://doi.org/10.1007/s00417-013-2473-6
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DOI: https://doi.org/10.1007/s00417-013-2473-6