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Zhang W, Chen XS, Wei Y, Wang XM, Chen XJ, Chi BT, Huang LQ, He RQ, Huang ZG, Li Q, Chen G, He J, Wu M. Overexpressed KCNK1 regulates potassium channels affecting molecular mechanisms and biological pathways in bladder cancer. Eur J Med Res 2024; 29:257. [PMID: 38689322 PMCID: PMC11059691 DOI: 10.1186/s40001-024-01844-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 04/15/2024] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND This study aimed to explore the expression, molecular mechanism and its biological function of potassium two pore domain channel subfamily K member 1 (KCNK1) in bladder cancer (BC). METHODS We integrated large numbers of external samples (n = 1486) to assess KCNK1 mRNA expression levels and collected in-house samples (n = 245) for immunohistochemistry (IHC) experiments to validate at the KCNK1 protein level. Single-cell RNA sequencing (scRNA-seq) analysis was performed to further assess KCNK1 expression and cellular communication. The transcriptional regulatory mechanisms of KCNK1 expression were explored by ChIP-seq, ATAC-seq and ChIA-PET data. Highly expressed co-expressed genes (HECEGs) of KCNK1 were used to explore potential signalling pathways. Furthermore, the immunoassay, clinical significance and molecular docking of KCNK1 were calculated. RESULTS KCNK1 mRNA was significantly overexpressed in BC (SMD = 0.58, 95% CI [0.05; 1.11]), validated at the protein level (p < 0.0001). Upregulated KCNK1 mRNA exhibited highly distinguishing ability between BC and control samples (AUC = 0.82 [0.78-0.85]). Further, scRNA-seq analysis revealed that KCNK1 expression was predominantly clustered in BC epithelial cells and tended to increase with cellular differentiation. BC epithelial cells were involved in cellular communication mainly through the MK signalling pathway. Secondly, the KCNK1 transcription start site (TSS) showed promoter-enhancer interactions in three-dimensional space, while being transcriptionally regulated by GRHL2 and FOXA1. Most of the KCNK1 HECEGs were enriched in cell cycle-related signalling pathways. KCNK1 was mainly involved in cellular metabolism-related pathways and regulated cell membrane potassium channel activity. KCNK1 expression was associated with the level of infiltration of various immune cells. Immunotherapy and chemotherapy (docetaxel, paclitaxel and vinblastine) were more effective in BC patients in the high KCNK1 expression group. KCNK1 expression correlated with age, pathology grade and pathologic_M in BC patients. CONCLUSIONS KCNK1 was significantly overexpressed in BC. A complex and sophisticated three-dimensional spatial transcriptional regulatory network existed in the KCNK1 TSS and promoted the upregulated of KCNK1 expression. The high expression of KCNK1 might be involved in the cell cycle, cellular metabolism, and tumour microenvironment through the regulation of potassium channels, and ultimately contributed to the deterioration of BC.
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Affiliation(s)
- Wei Zhang
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Xiao-Song Chen
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Ying Wei
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Xiao-Min Wang
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Xian-Jin Chen
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Bang-Teng Chi
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Lin-Qing Huang
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Rong-Quan He
- Department of Medical Oncology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Zhi-Guang Huang
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Qi Li
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Gang Chen
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Juan He
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China.
| | - Mei Wu
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong RD, Nanning, 530021, Guangxi Zhuang Autonomous Region, People's Republic of China.
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Rua C, Guéguinou M, Soubai I, Viel E, Potier-Cartereau M, Chantome A, Barbe C, Bougnoux P, Barin-Le Guellec C, Vandier C. SK3 Gene Polymorphism Is Associated with Taxane Neurotoxicity and Cell Calcium Homeostasis. Clin Cancer Res 2018; 24:5313-5320. [PMID: 30037821 DOI: 10.1158/1078-0432.ccr-18-0870] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 06/13/2018] [Accepted: 07/17/2018] [Indexed: 11/16/2022]
Abstract
Purpose: Taxane-induced peripheral neuropathy is a common side effect induced by anticancer agents, and no drug capable of preventing its occurrence or ameliorating its long-term course has been identified. The physiology of taxane neuropathy is not clear, and diverse mechanisms have been suggested, with ion channels regulating Ca2+ homeostasis appearing good candidates. The calcium-activated potassium channel SK3 is encoded by the KCNN3 gene, which is characterized by a length polymorphism due to variable number of CAG repeats.Experimental Design: To study the influence of the polymorphism of CAG motif repeat of KCNN3 on the development of taxane-induced neuropathy, we evaluated 176 patients treated with taxanes for breast cancer. In parallel, we measured Ca2+ entry using Fura2-AM dye in HEK cells expressing short versus long CAG alleles of KCNN3 Results: In the current study, we report that in the presence of docetaxel, Ca2+ entry was significantly increased in cells expressing short versus long CAG alleles of SK3 and that a SK3-lipid blocker inhibits this effect. We found that patients carrying a short KCNN3 allele exhibited significantly increased incidence of taxane neuropathy compared with those carrying longer alleles.Conclusions: The clinical implication of these findings is that KCNN3 polymorphism may increase patient susceptibility to taxane neurotoxicity and that the use of SK3 blockers during taxanes' administration may represent an interesting approach for the prevention of this neurotoxicity. Clin Cancer Res; 24(21); 5313-20. ©2018 AACR.
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Affiliation(s)
- Carina Rua
- Université de Tours, Inserm, N2C UMR1069, Tours, France.,CHRU Bretonneau, Tours, France.,Ion channels and Cancer Network of Canceropole Grand Ouest (IC-CGO), Nantes, France
| | - Maxime Guéguinou
- Université de Tours, Inserm, N2C UMR1069, Tours, France.,Ion channels and Cancer Network of Canceropole Grand Ouest (IC-CGO), Nantes, France
| | - Imane Soubai
- CHRU Bretonneau, Tours, France.,Université de Tours, Faculté de Pharmacie, Tours, France
| | | | - Marie Potier-Cartereau
- Université de Tours, Inserm, N2C UMR1069, Tours, France.,Ion channels and Cancer Network of Canceropole Grand Ouest (IC-CGO), Nantes, France.,Université de Tours, Faculté de Sciences et Techniques, Tours, France
| | - Aurélie Chantome
- Université de Tours, Inserm, N2C UMR1069, Tours, France.,Ion channels and Cancer Network of Canceropole Grand Ouest (IC-CGO), Nantes, France
| | | | - Philippe Bougnoux
- Université de Tours, Inserm, N2C UMR1069, Tours, France.,CHRU Bretonneau, Tours, France.,Ion channels and Cancer Network of Canceropole Grand Ouest (IC-CGO), Nantes, France.,Université de Tours, Faculté de Médecine, Tours, France
| | - Chantal Barin-Le Guellec
- Université de Tours, Faculté de Médecine, Tours, France.,Université de Limoges, Inserm, UMR1248, Limoges, France
| | - Christophe Vandier
- Université de Tours, Inserm, N2C UMR1069, Tours, France. .,Ion channels and Cancer Network of Canceropole Grand Ouest (IC-CGO), Nantes, France.,Université de Tours, Faculté de Sciences et Techniques, Tours, France
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