scholarly journals Expression of genes and proteins of multidrug resistance in gastric cancer cells treated with resveratrol

2018 ◽  
Author(s):  
Katarzyna Mieszala ◽  
Malgorzata Rudewicz ◽  
Agnieszka Gomulkiewicz ◽  
Katarzyna Ratajczak‑Wielgomas ◽  
Jedrzej Grzegrzolka ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Multidrug Resistance ◽  
Cancer Cells ◽  
Gastric Cancer Cells ◽  
Expression Of Genes

scholarly journals Berberine Improves Chemo-Sensitivity to Cisplatin by Enhancing Cell Apoptosis and Repressing PI3K/AKT/mTOR Signaling Pathway in Gastric Cancer

2020 ◽  
Vol 11 ◽  
Author(s):  
Yingying Kou ◽  
Bending Tong ◽  
Weiqing Wu ◽  
Xiangqing Liao ◽  
Min Zhao
Keyword(s):  
Gastric Cancer ◽  
Drug Resistance ◽  
Multidrug Resistance ◽  
Cell Viability ◽  
Cancer Cells ◽  
Cell Apoptosis ◽  
Mtor Signaling ◽  
Multi Drug Resistance ◽  
Gastric Cancer Cells

Gastric cancer is one of the most common malignancies ranks as the second leading cause of cancer-related mortality in the world. Cisplatin (DDP) is commonly used for gastric cancer treatment, whereas recurrence and metastasis are common because of intrinsic and acquired DDP-resistance. The aim of this study is to examine the effects of berberine on the DDP-resistance in gastric cancer and explore the underling mechanisms. In this study, we established the DDP-resistant gastric cancer cells, where the IC50 values of DDP in the BGC-823/DDP and SGC-7901/DDP were significantly higher than that in the corresponding parental cells. Berberine could concentration-dependently inhibited the cell viability of BGC-823 and SGC-7901 cells; while the inhibitory effects of berberine on the cell viability were largely attenuated in the DDP-resistant cells. Berberine pre-treatment significantly sensitized BGC-823/DDP and SGC-7901/DDP cells to DDP. Furthermore, berberine treatment concentration-dependently down-regulated the multidrug resistance-associated protein 1 and multi-drug resistance-1 protein levels in the BGC-823/DDP and SGC7901/DDP cells. Interestingly, the cell apoptosis of BGC-823/DDP and SGC-7901/DDP cells was significantly enhanced by co-treatment with berberine and DDP. The results from animals also showed that berberine treatment sensitized SGC-7901/DDP cells to DDP in vivo. Mechanistically, berberine significantly suppressed the PI3K/AKT/mTOR in the BGC-823/DDP and SGC-7901/DDP cells treated with DDP. In conclusion, we observed that berberine sensitizes gastric cancer cells to DDP. Further mechanistic findings suggested that berberine-mediated DDP-sensitivity may be associated with reduced expression of drug transporters (multi-drug resistance-1 and multidrug resistance-associated protein 1), enhanced apoptosis and repressed PI3K/AKT/mTOR signaling.

DJ-1 is involved in the multidrug resistance of SGC7901 gastric cancer cells through PTEN/PI3K/Akt/Nrf2 pathway

2020 ◽  
Vol 52 (11) ◽  
pp. 1202-1214
Author(s):  
Lejia Qiu ◽  
Zhaoxia Ma ◽  
Xiaoran Li ◽  
Yizhang Deng ◽  
Guangling Duan ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Multidrug Resistance ◽  
Cancer Cells ◽  
Gastric Cancer Cells ◽  
Glycoprotein P ◽  
Nrf2 Pathway ◽  
P Glycoprotein ◽  
New Findings ◽  
Nrf2 Signaling Pathway ◽  
Common Malignancy

Abstract Gastric cancer is a common malignancy worldwide. The occurrence of multidrug resistance (MDR) is the major obstacle for effective gastric cancer chemotherapy. In this study, the in-depth molecular mechanism of the DJ-1-induced MDR in SGC7901 gastric cancer cells was investigated. The results showed that DJ-1 expression level was higher in MDR variant SGC7901/VCR cells than that in its parental SGC7901 cells. Moreover, DJ-1 overexpression conferred the MDR phenotype to SGC7901 cells, while DJ-1 knockdown in SGC7901/VCR cells induced re-sensitization to adriamycin, vincristine, cisplatin, and 5-fluorouracil. These results suggested that DJ-1 mediated the development of MDR in SGC7901 gastric cancer cells. Importantly, further data revealed that the activation of PI3k/Akt and Nrf2 signaling pathway were required for the DJ-1-induced MDR phenotype in SGC7901 gastric cancer cells. Meanwhile, we found that PI3k/Akt pathway was activated probably through DJ-1 directly binding to and negatively regulating PTEN, consequently resulting in Nrf2 phosphorylation and activation, and thereby inducing Nrf2-dependent P-glycoprotein (P-gp) and Bcl-2 expressions in the DJ-1-mediated MDR of SGC7901 gastric cancer cells. Overall, these results revealed that activating PTEN/PI3K/Akt/Nrf2 pathway and subsequently upregulating P-gp and Bcl-2 expression could be a critical mechanism by which DJ-1 mediates the development of MDR in SGC7901 gastric cancer cells. The new findings may be helpful for understanding the mechanisms of MDR in gastric cancer cells, prompting its further investigation as a molecular target to overcome MDR.

scholarly journals Regulation of multidrug resistance by ribosomal protein L6 in gastric cancer cells

2005 ◽  
Vol 4 (2) ◽  
pp. 250-255 ◽  
Author(s):  
Jingping Du ◽  
Yongquan Shi ◽  
Yanglin Pan ◽  
Xiaohang Jin ◽  
Changjiang Liu ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Multidrug Resistance ◽  
Ribosomal Protein ◽  
Cancer Cells ◽  
Gastric Cancer Cells

scholarly journals Octarepeat peptides of prion are essential for multidrug resistance in gastric cancer cells

2012 ◽  
Vol 13 (3) ◽  
pp. 143-152 ◽  
Author(s):  
Ji Heng WANG ◽  
Jing Ping DU ◽  
Shu Jun LI ◽  
Li Ping ZHAI ◽  
Xin Yan YANG ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Multidrug Resistance ◽  
Cancer Cells ◽  
Gastric Cancer Cells

scholarly journals CIAPIN1 confers multidrug resistance by upregulating the expression of MDR-1 and MRP-1 in gastric cancer cells

2006 ◽  
Vol 5 (3) ◽  
pp. 261-266 ◽  
Author(s):  
Zhiming Hao ◽  
Xiaohua Li ◽  
Taidong Qiao ◽  
Rui Du ◽  
Liu Hong ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Multidrug Resistance ◽  
Cancer Cells ◽  
Gastric Cancer Cells ◽  
Mdr 1

scholarly journals Reversal of Multidrug Resistance of Gastric Cancer Cells by Downregulation of TSG101 with TSG101siRNA

2004 ◽  
Vol 3 (6) ◽  
pp. 561-565 ◽  
Author(s):  
Huiqin Shen ◽  
Yanglin Pan ◽  
Zheyi Han ◽  
Na Liu ◽  
Shuang Han ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Multidrug Resistance ◽  
Cancer Cells ◽  
Gastric Cancer Cells
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