WEI Jingjing,ZHU Zhongbo,LIU Xiping,et al.Effect of Banxia Xiexintang-containing Intestinal Absorption Solution on PMN-MDSCs Apoptosis in Gastric Cancer Microenvironment[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(10):58-64.
WEI Jingjing,ZHU Zhongbo,LIU Xiping,et al.Effect of Banxia Xiexintang-containing Intestinal Absorption Solution on PMN-MDSCs Apoptosis in Gastric Cancer Microenvironment[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(10):58-64. DOI: 10.13422/j.cnki.syfjx.202201725.
Effect of Banxia Xiexintang-containing Intestinal Absorption Solution on PMN-MDSCs Apoptosis in Gastric Cancer Microenvironment
To observe the effect of Banxia Xiexintang (BXT)-containing intestinal absorption solution on the apoptosis of polymorphonuclear myeloid-derived suppressor cells (PMN-MDSCs) in gastric cancer microenvironment.
Method
2
BXT-containing intestinal absorption solution was prepared, and gastric cancer cells and PMN-MDSCs were non-contact co-cultured in Transwell chamber to establish gastric cancer microenvironment. Cell counting kit-8 (CCK-8) assay was used to screen the optimal intervention concentration and time of 0-100% BXT-containing intestinal absorption solution prepared by 0.63 g·mL
-1
reconstitution solution. Cells were classified into blank group, model group, oxaliplatin group (10 mg·L
-1
), and BXT (26%, 18%, 10% BXT-containing intestinal absorption solution) group, and the apoptosis of PMN-MDSCs was detected by flow cytometry. The expression of apoptosis-related B-cell lymphoma 2 (Bcl-2), Bcl-2-associated X protein (Bax), and cysteine-aspartic acid protease-3 (Caspase-3) in PMN-MDSCs was detected by Western blot.
Result
2
After treatment for 24 h and 48 h, the PMN-MDSCs-inhibiting rate was increased by 5%, 50%, 75%, and 100% BXT-containing intestinal absorption solution compared with that in the blank group (
P
<
0.05,
P
<
0.01). At 72 h, the PMN-MDSCs-inhibiting rate by 50% BXT-containing intestinal absorption solution was lower than that at 48 h (
P
<
0.01), and the PMN-MDSCs-inhibiting rate by 5%, 75%, and 100% BXT-containing intestinal absorption solution showed no significant difference from that at 48 h. Moreover, the half-maximal inhibitory concentration (IC
50
) at 48 h was 18.40%. Thus, 18% BXT-containing intestinal absorption solution and 48 h were the optimal intervention concentration and time. The survival rate of PMN-MDSCs in model group was higher than that in the blank group (
P
<
0.05), and the apoptosis rate was lower than that in the blank group (
P
<
0.05). Compared with model group, BXT containing intestinal absorption solution lowered the survival rate and raised apoptosis rate of PMN-MDSCs (
P
<
0.05), particularly the 26% BXT-containing intestinal absorption solution (
P
<
0.05). The expression of Bax and Caspase-3 in PMN-MDSCs was lower in the model group than in the blank group (
P
<
0.05), and the expression of Bcl-2 was higher in the model group than in the blank group (
P
<
0.05). The expression of Caspase-3 in PMN-MDSCs increased (
P
<
0.05) and the expression of Bcl-2 decreased (
P
<
0.05) in oxaliplatin group and BXT group compared with those in the model group. The expression of Bax rose in oxaliplatin group and BXT group (10% BXT-containing intestinal absorption solution) (
P
<
0.05).
Conclusion
2
BXT can induce the apoptosis of PMN-MDSCs by regulating the expression of apoptosis-related proteins Bax, Caspase-3, and Bcl-2 in gastric cancer microenvironment.
关键词
Keywords
references
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