Effects of Astragalus polysaccharides on immune escape of tumor cells in bladder cancer mice
10.13699/j.cnki.1001-6821.2024.24.018
- VernacularTitle:红芪多糖调控膀胱癌小鼠肿瘤细胞免疫逃逸的研究
- Author:
Dong-mei FAN
1
;
Shi-yu ZHANG
;
Shu-wen WANG
;
Guan-hai WANG
Author Information
1. 广东医科大学第二临床医学院,广东东莞 523808
- Publication Type:Journal Article
- Keywords:
Astragalus polysaccharide;
transforming growth factor-β;
recombinant forkhead box protein P3;
retinoic acid receptor-related orphan receptor gamma t;
immune escape
- From:
The Chinese Journal of Clinical Pharmacology
2024;40(24):3611-3615
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore whether Astragalus polysaccharide can inhibit immune escape of T helper cells 17(Th17)and regulatory T cells(Treg)-mediated tumor cell immune escape in mice with bladder cancer by regulating the transforming growth factor-β1(TGF-β1)/FOXP3/retinoic acid receptor-associated orphan receptor-γT(RORγt)pathway.Methods Human bladder cancer cell line 5637 was injected into the BALB/c male nude mice to establish the model.After successful mold making,the model mice were randomly divided into model group,control group and experimental-L,-M,-H groups,10 mice per group;another 10 normal mice were taken as the blank group.The experimental-L,-M,-H groups were administered with stragalus polysaccharide solutions at doses of 100,200 and 300 mg·kg-1·d-1 by gavage,respectively.The model group and blank group were administered with 0.9％NaCl solution at a dose of 20 mL·kg-1·d-1 by gavage.The control group was administered with cisplatin at a dose of 5 mg·kg-1·d-1 by gavage.Six groups were treated for one month with once a day.After the drug,the tumor suppression was calculated.The cell apoptosis was determined by the TUNEL assay.The counts of Th1 and Treg cells were determined by flow cytometry.The expression levels of TGF-β1,FoxP3 and RORγt in bladder tissues were determined by Western blotting.Results The tumor weight of the experimental-H,the control group and the model group were(0.89±0.12),(0.67±0.09)and(2.09±0.31)g,respectively;the apoptosis indexes were(21.93±2.53)％,(23.91±2.18)％and(4.18±0.39)％,respectively.The contents of Treg cells in experimental-H group,control group,model group and blank group were(3.18±1.15)％,(2.97±0.98)％,(17.23±5.34)％and(2.73±1.04)％,respectively;the contents of Th7 cells were(1.03±0.36)％,(0.92±0.33)％,(6.28±1.96)％and(0.86±0.33)％,respectively;the relative expression levels of TGF-β1 protein were 0.34±0.13,0.33±0.11,0.69±0.10 and 0.32±0.08,respectively;the relative expression levels of FoxP3 protein were 0.21±0.05,0.20±0.06,0.72±0.16 and 0.19±0.06,respectively;the relative expression levels of RORγt protein were 0.34±0.12,0.32±0.12,0.66±0.17 and 0.36±0.09,respectively.Compared with experimental-H and control groups,the above indexes in the model group were statistically significant(all P＜0.05).Conclusion Astragalus polysaccharide can regulate the TGF-β1/FoxP3/RORγt pathway to inhibit Treg and Th7 cells-mediated immune evasion of bladder cancer in mice.
