细胞凋亡
癌症研究
癌细胞
间充质干细胞
癌症干细胞
癌症
生物
干细胞
细胞
分子生物学
化学
细胞生物学
生物化学
遗传学
作者
Qingkun Gao,Chao-Yuan Huang,Ting Liu,Fumeng Yang,Zhihong Chen,Li Sun,Yuanyuan Zhao,Mei Wang,Ling Luo,Chenglin Zhou,Wei Zhu
摘要
Abstract Despite surgical treatment combined with multidrug therapy having made some progress, chemotherapy resistance is the main cause of recurrence and death of gastric cancer (GC). Gastric cancer mesenchymal stem cells (GCMSCs) have been reported to be correlated with the limited efficacy of chemotherapy in GC, but the mechanism of GCMSCs regulating GC resistance needs to be further studied. The gene set enrichment analysis (GSEA) was performed to explore the glycolysis‐related pathways heterogeneity across different cell subpopulations. Glucose uptake and lactate production assays were used to evaluate the importance of B7H3 expression in GCMSCs‐treated GC cells. The therapeutic efficacy of oxaliplatin (OXA) and paclitaxel (PTX) was determined using CCK‐8 and colony formation assays. Signaling pathways altered by GCMSCs‐CM were revealed by immunoblotting. The expression of TNF‐α in GCMSCs and bone marrow mesenchymal stem cells (BMMSCs) was detected by western blot analysis and qPCR. Our results showed that the OXA and PTX resistance of GC cells were significantly enhanced in the GCMSCs‐CM treated GC cells. Acquired OXA and PTX resistance was characterized by increased cell viability for OXA and PTX, the formation of cell colonies, and decreased levels of cell apoptosis, which were accompanied by reduced levels of cleaved caspase‐3 and Bax expression, and increased levels of Bcl‐2, HK2, MDR1, and B7H3 expression. Blocking TNF‐α in GCMSCs‐CM, B7H3 knockdown or the use of 2‐DG, a key enzyme inhibitor of glycolysis in GC cells suppressed the OXA and PTX resistance of GC cells that had been treated with GCMSCs‐CM. This study shows that GCMSCs‐CM derived TNF‐α could upregulate the expression of B7H3 of GC cells to promote tumor chemoresistance. Our results provide a new basis for the treatment of GC.
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