Fang Zhongyang,Zhang Buxin,Lu Yu,et al.Geniposide alleviates imiquimod-induced psoriasis-like dermatitis in mice by regulating the interleukin-23/T helper 17 cells axis[J].Journal of Chongqing Medical University,2026,51(10):1472-1478.
Fang Zhongyang,Zhang Buxin,Lu Yu,et al.Geniposide alleviates imiquimod-induced psoriasis-like dermatitis in mice by regulating the interleukin-23/T helper 17 cells axis[J].Journal of Chongqing Medical University,2026,51(10):1472-1478.DOI: 10.13406/j.cnki.cyxb.004171.
Geniposide alleviates imiquimod-induced psoriasis-like dermatitis in mice by regulating the interleukin-23/T helper 17 cells axis
To investigate the effect of geniposide on imiquimod-induced psoriasis-like dermatitis in mice and its potential mechanism of action based on the interleukin(IL)-23/T helper 17 cells(Th17) axis.
Methods
2
A total of 60 specific pathogen-free healthy male BALB/c mice(age:6-7 weeks; body weight:20-25 g) were used,among which 6 mice were randomly selected as the control group,and the remaining mice were used to establish a model of psoriasis-like dermatitis using the imiquimod cream induction method. After successful modeling,the mice were divided into model group,low-dose geniposide group(intraperitoneal injection of 20 mg/kg geniposide daily for 1 week),high-dose geniposide group (intraperitoneal injection of 40 mg/kg geniposide daily for 1 week),and positive drug group(intragastric administration of 5 mg/kg dexamethasone daily for 1 week),with 6 mice in each group. The Psoriasis Area and Severity Index(PASI) score and epidermal water content were measured for all mice;HE staining was used to observe the morphological changes of skin lesions and determine Baker score; flow cytometry was used to measure the percentages of Th17 and Treg cells and calculate Th17/Treg ratio; kits were used to measure the levels of IL-23,IL-17A,IL-22,IL-6,and IL-10,and Western blot was used to measure the expression levels of the proteins associated with the IL-23/Th17 axis in skin lesions.
Results
2
Compared with the control group,the model group had a significant reduction in epidermal water content(
t
=13.350,
P
<
0.05),significant increases in PASI and Baker scores(
t
=17.105,15.588,
P
<
0.05),aggravated pathological damage in skin lesions,and significant increases in the percentage of Th17 cells,Th17/Treg ratio,the levels of IL-23,IL-17A,IL-22,and IL-6,the protein expression level of IL-23,p-STAT3/STAT3 ratio,and the protein expression level of IL-17A(
0.05),as well as significant reductions in the percentage of Treg cells and the level of IL-10(
t
=13.426,18.219,
P
<
0.05).
Compared with the model group,the low- and high-dose geniposide groups and the positive drug group had a significant increase in epidermal water content(
t
=6.485,10.423,10.912,
P
<
0.05),significant reductions in PASI score(
t
=5.282,5.961,11.173,
P
<
0.05) and Baker score(
t
=3.856,10.078,10.078,
P
<
0.05),alleviation of pathological damage in skin lesions,and significant reductions in the percentage of Th17 cells(
t
=4.477,11.675,11.751,
P
<
0.05),Th17/Treg ratio (
t
=11.407,18.936,19.061,
P
<
0.05),the levels of IL-23(
t
=4.868,10.860,11.156,
P
<
0.05),IL-17A(
t
=7.087,14.536,13.887,
P
<
0.05),IL-22 (
t
=4.317,10.076,10.561,
P
<
0.05),and IL-6(
t
=5.200,10.573,10.240,
P
<
0.05),the protein expression level of IL-23(
t
=4.322,11.758,12.163,
P
<
0.05),p-STAT3/STAT3 ratio(
t
=2.939,8.764,9.129,
P
<
0.05),and the protein expression level of IL-17A (
t
=3.964,11.758,11.758,
P
<
0.05),as well as significant increases in the percentage of Treg cells(
t
=7.838,12.433,12.888,
P
<
0.05) and the level of IL-10(
t
=10.999,16.800,17.279,
P
<
0.05). The high-dose group had significantly greater improvements than the low-dose group.
Conclusion
2
Geniposide can alleviate imiquimod-induced psoriasis-like dermatitis in mice,possibly by inhibiting the IL-23/Th17 axis and regulating Th17/Treg balance.
关键词
Keywords
references
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