Objective: This paper aims to investigate the therapeutic effect of the combination of Emilia Sonchifolia and Coptidis Rhizoma on oral ulcer rats. Methods: 36 SD rats of half male and half female were kept for 7 days, and 6 rats among them were selected as normal group by random sampling method, and the rest rats were randomly divided into model group, positive control group, Emilia Sonchifolia group, Coptidis Rhizoma group and combined group after the establishment of oral ulcer model. The normal group and model group were given blank film, the positive control group was given Guilin Watermelon Frost, and the Emilia Sonchifolia group, Coptidis Rhizoma group and combined group were given the corresponding oral film, which was administered to the ulcer for 7 days continuously, 2 times per day. The healing of oral ulcer was assessed at the end of the last day of administration, and the ulcer area was calculated on the 1st, 3rd, 5th and 7th days after successful modeling, and the serum levels of IL-2 and TNF-α in rats were detected by Emilia Sonchifolia. Results: The grading of ulcer healing in the positive control group and the combined group was better than the other groups, and the difference was statistically significant when compared with the model group (p < 0.05). On the 3rd, 5th and 7th days, the ulcer area in the Coptidis Rhizoma group, Emilia Sonchifolia group, combined group and positive control group was smaller than that in the model group, and the difference was statistically significant (p < 0.05), indicating that the Emilia Sonchifolia group, Coptidis Rhizoma group and combined group were all effective in reducing the area of oral ulcer, among which the combined group was more effective. The level of pro-inflammatory factor TNF-α was reduced and the level of anti-inflammatory factor IL-2 was increased in the Emilia Sonchifolia group, Coptidis Rhizoma group and combined group, and the difference was statistically significant (p < 0.05) when compared with the model group, with the positive control group and combined group having better effects than the other groups. Conclusion: The combination of Coptidis Rhizoma and Emilia Sonchifolia is effective in the treatment of oral ulcer in rats, and the effect of the combination is better than that of the drug alone.
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