Qihuang Jianpi Zishen Granules improves renal damage in MRL/lpr mice by inhibiting B cell differentiation via the AIM2/Blimp-1/Bcl-6 axis
10.12122/j.issn.1673-4254.2025.11.02
- VernacularTitle:芪黄健脾滋肾颗粒通过AIM2/Blimp-1/Bcl-6轴抑制B细胞分化改善MRL/lpr小鼠肾损害
- Author:
Lili CHENG
1
;
Zhongfu TANG
;
Ming LI
;
Junjie CHEN
;
Shuangshuang SHANG
;
Sidi LIU
;
Chuanbing HUANG
Author Information
1. 安徽中医药大学第一附属医院风湿科,安徽 合肥 230012
- Publication Type:Journal Article
- Keywords:
Qihuang Jianpi Zishen Granules;
systemic lupus erythematosus;
renal damage;
B cells;
AIM2/Blimp-1/Bcl-6
- From:
Journal of Southern Medical University
2025;45(11):2297-2308
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the efficacy of Qihuang Jianpi Zishen Granules(QJZ)for inhibiting renal B cell differentiation in MRL/lpr mice and explore its underlying mechanism.Methods Thirty 8-week-old female MRL/lpr mice were randomly divided into model group,QJZ group,prednisone(Pred)group,QJZ+Pred group,and AIM2 inhibitor group(n=6),with 6 8-week-old female C57BL/6 mice as the normal control group.After treatments with normal saline,QJZ,Pred,or AIM2 inhibitor for 8 weeks,the mice were examined for urinary total protein-to-creatinine ratio(TPCR)and albumin-to-creatinine ratio(ACR),serum creatinine(Cr)and blood urea nitrogen(BUN)levels,and renal histopathology(with HE,Masson,and PAS staining)and ultrastructural changes(with electron microscopy).ELISA,immunohistochemistry,immunofluorescence staining and flow cytometry were used to detect blood levels of anti-dsDNA antibodies,cytokines and chemokines,renal deposition of complement components C3 and C4,renal expressions of AIM2,CD19,CD27 and CD138,and changes in splenic B lymphocyte subsets.The effect of QJZ on the AIM2/Blimp-1/Bcl-6 signaling axis was examined using Western blotting.Results QJZ treatment significantly improved Cr,BUN,TPCR and ACR in MRL/lpr mice,ameliorated renal pathologies,reduced the expressions of ds-DNA,BAFF,IL-21,CXCL12,CXCL13,C3 and C4,and increased IL-10 levels.QJZ significantly downregulated renal expressions of the key B-cell transcription factors Blimp-1 and XBP-1,upregulated Bcl-6 and PAX5 expressions,inhibited B-cell differentiation,and lowered the expressions of AIM2,CD27,CD138 and CD69.Inhibition of AIM2 similarly reduced renal Blimp-1 and XBP-1 expressions,increased Bcl-6 and PAX5 levels,suppressed B-cell differentiation,decreased IgG production,reduced C3 and C4 deposition,and alleviated renal pathology in MRL/lpr mice.Conclusion QJZ inhibits B cell differentiation and alleviates renal damage in systemic lupus erythematosus possibly by suppressing the AIM2/Blimp-1/Bcl-6 signaling pathway.
