4.6 Article

Dendrobium nobile protects against ovalbumin-induced allergic rhinitis by regulating intestinal flora and suppressing lung inflammation

期刊

CHINESE JOURNAL OF NATURAL MEDICINES
卷 20, 期 6, 页码 443-457

出版社

CHINESE JOURNAL NATURAL MEDICINES
DOI: 10.1016/S1875-5364(22)60168-7

关键词

Dendrobium nobile (Shihu); Allergic rhinitis; Intestinal flora; Regulator T cell; Inflammation

资金

  1. Shenzhen Key Discipline of Medicine [2020-2024, SZXK039]
  2. Science and Tech-nology Development Special Fund of Shenzhen Longgang District [LGKCYLWS2019000749, LGKCYLWS2019000846]
  3. China Postdoctoral Science Foundation [2020M683137]

向作者/读者索取更多资源

This study investigated the mechanism by which Dendrobium nobile (Shihu) extract may improve allergic rhinitis. The results showed that Shihu extract restored the balance in intestinal flora, alleviated inflammation in the lungs of allergic rhinitis mice, and predicted a potential therapeutic approach using Traditional Chinese Medicine for allergic rhinitis.
Antibiotic exposure-induced dysbiosis of the intestinal flora increases the risk of developing allergic rhinitis. Hence, regulating the balance of intestinal flora may be useful for preventing and treating allergic rhinitis. However, the underlying mechan-ism is unclear. Dendrobium nobile (Shihu) exhibits anti-inflammatory and immune activities. Hence, in this study, we investigated the mechanism via which Shihu may improve allergic rhinitis. Mouse models of allergic rhinitis with intestinal flora dysbiosis (Model-D, antibiotics induce intestinal flora dysbiosis with ovalbumin-induced allergy) and normal intestinal flora with allergic rhinitis (Model-N, ovalbumin-induced allergy) were established. The effect of Shihu on intestinal flora and inflammation caused during allergic rhinitis were analyzed. Allergic symptoms, infiltration of hematoxylin and eosin in the lungs and nose, and the release of various factors [inter-leukin (IL)-2, IL-4, IFN-?? , IL-6, IL-10, and IL-17] in the lungs were evaluated. The results indicate that intestinal flora dysbiosis ex-acerbated lung and nose inflammation in allergic rhinitis. However, treatment with the Shihu extract effectively reversed these symp-toms. Besides, the Shihu extract inhibited the PI3K/AKT/mTOR pathway and increased the level of Forkhead box protein in the lungs. Additionally, the Shihu extract reversed intestinal flora dysbiosis at the phylum and genus levels and improved regulator T cell differ-entiation. Furthermore, in the Model-D group, the Shihu extract inhibited the decrease in the diversity and abundance of the intestinal flora. Screening was performed to determine which intestinal flora was positively correlated with Treg differentiation using Spearman??? s correlation analysis. In conclusion, we showed that Shihu extract restored the balance in intestinal flora and ameliorated inflamma-tion in the lungs of allergic rhinitis mice and predicted a therapeutic new approach using Traditional Chinese Medicine to improve al-lergic rhinitis.

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