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Zhou C, Chen L, Chen R, Xu F, Huang Z, Huang R, Wang W, Xu Q. miR-4486 enhances cisplatin sensitivity of gastric cancer cells by restraining the JAK3/STAT3 signalling pathway. J Chemother 2021; 34:35-44. [PMID: 34167436 DOI: 10.1080/1120009x.2021.1936957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Along with the occurrence of cisplatin resistance, treatment on gastric cancer (GC) becomes difficult. Therefore, researches on new therapeutic methods to revert cisplatin resistance are becoming increasingly urgent. qRT-PCR was used to quantify the expression of miR-4486, JAK3 in SGC-7901 or SGC-7901/DDP cell lines. WB was utilized to analyze the expression of JAK3, STAT3 and p-STAT3 in SGC-7901/DDP cell lines. CCK-8 assay was used to determine the IC50 of cisplatin on both cell lines and cell viability of SGC-7901/DDP cell lines. The target relationship between miR-4486 and JAK3 was determined by luciferase assay. MiR-4486 expression on apoptosis of SGC-7901/DDP cell lines was determined by flow cytometry. qRT-PCR testified that miR-4486 decreased in SGC-7901/DDP cells, and the expression of miR-4486 mimic increased significantly compared with miR-4486 NC. By CCK-8 assay, the IC50 of cisplatin on both cell lines were 9 μg/mL and 81.3 μg/mL, and overexpression of miR-4486 decreased the viability of SGC-7901/DDP cells. Compared with DDP group, the expression of miR-4486 accelerated SGC-7901/DDP cells apoptosis. Dual-luciferase assay suggested that JAK3 was the target gene of miR-4486. qRT-PCR and WB proved that miR-4486/JAK3 axis inhibit the activation of JAK3/STAT3 pathway, and JAK3 overexpression can partly reverse this. As shown by CCK-8 and flow cytometry, miR-4486 overexpression decreased viability and stimulated apoptosis of SGC-7901/DDP cells. However, JAK3 overexpression can also partly revert this. miR-4486 overexpression could decrease viability and improve apoptosis of SGC-7901/DDP cells to revert its cisplatin-resistance, and the mechanism may be related to JAK3/STAT3 signalling pathway.
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Affiliation(s)
- Caijin Zhou
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Linxia Chen
- Department of Operating Room, the Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Rihong Chen
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Feipeng Xu
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Zhe Huang
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Renwei Huang
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Weiwei Wang
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Qingwen Xu
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
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