WU Dong-sheng,CAO Hui,ZHANG Yu,et al.Shaoyaotang Treats Ulcerative Colitis by Inhibiting HIF-1α and Regulating Th17/Treg Balance[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(16):9-15.
WU Dong-sheng,CAO Hui,ZHANG Yu,et al.Shaoyaotang Treats Ulcerative Colitis by Inhibiting HIF-1α and Regulating Th17/Treg Balance[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(16):9-15. DOI: 10.13422/j.cnki.syfjx.20211503.
Shaoyaotang Treats Ulcerative Colitis by Inhibiting HIF-1α and Regulating Th17/Treg Balance
To explore the effect of hypoxia-inducible factor (HIF)-1
α
on T helper 17 (Th17)/regulatory T cell (Treg) balance in ulcerative colitis and the intervention mechanism of Shaoyaotang.
Method
2
Forty-eight SD rats were randomly divided into normal group (normal saline), model group, mesalazine group (0.42 g·kg
-1
), Shaoyaotang group (11.1 g·kg
-1
), inhibitor group [2-methoxyestradiol (2ME
2
), 0.015 g·kg
-1
], and Shaoyaotang+inhibitor group. The ulcerative colitis model was induced by 2,4,6-trinitrobenzene sulfonic acid (TNBS). The rats in all groups received corresponding treatments for 7 d, and the general condition and disease activity index (DAI) were observed. Hematoxylin-eosin (HE) staining was used to observe histopathological changes of the colon. Enzyme-linked immunosorbent assay (ELISA) was employed to detect serum levels of interleukin (IL)-10, IL-17, and IL-23 in rats. Western blot was used to detect the expression levels of forkhead box protein 3 (FoxP3), retinoic acid-related orphan receptor
γ
t (ROR
γ
t), and HIF-1
α
proteins in the colon tissue.
Result
2
Compared with the normal group, the model group showed elevated disease activity index (DAI) score and pathological score for intestinal mucosa (
P
<
0.01), reduced serum IL-10 level (
P
<
0.01), up-regulated IL-17 and IL-23 levels (
P
<
0.01), increased ROR
γ
t and HIF-1
α
expression (
P
<
0.01), and decreased FoxP3 protein expression (
P
<
0.01). Compared with the model group, the Shaoyaotang group displayed diminished DAI score and pathological score for intestinal mucosa (
P
<
0.05,
P
<
0.01), increased serum IL-10 level (
P
<
0.01), decreased IL-17 and IL-23 levels (
P
<
0.01), dwindled protein levels of ROR
γ
t and HIF-1
α
(
P
<
0.01), and up-regulated expression of FoxP3 (
P
<
0.01). Compared with the inhibitor group, the Shaoyaotang group and the Shaoyaotang+inhibitor group exhibited significant differences in the expression of ROR
γ
t, FoxP3, and HIF-1
α
proteins (
P
<
0.05,
P
<
0.01).
Conclusion
2
Shaoyaotang could effectively treat ulcerative colitis, and the underlying mechanism of action might be related to the regulation of Th17/Treg rebalance by inhibiting HIF-1
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