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Xiong RH, Yang SQ, Li JW, Shen XK, Jin LM, Chen CY, Yue YT, Yu ZC, Sun QY, Jiang W, Jiang MZ, Wang XY, Song SX, Cao D, Ye HL, Zhao LR, Huang LP, Bu L. Identification of immune-associated biomarker for predicting lung adenocarcinoma: bioinformatics analysis and experiment verification of PTK6. Discov Oncol 2024; 15:102. [PMID: 38573548 PMCID: PMC10994900 DOI: 10.1007/s12672-024-00939-9] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 03/17/2024] [Indexed: 04/05/2024] Open
Abstract
BACKGROUND Abnormal expression of protein tyrosine kinase 6 (PTK6) has been proven to be involved in the development of gynecological tumors. However, its immune-related carcinogenic mechanism in other tumors remains unclear. OBJECTIVE The aim of this study was to identify PTK6 as a novel prognostic biomarker in pan-cancer, especially in lung adenocarcinoma (LUAD), which is correlated with immune infiltration, and to clarify its clinicopathological and prognostic significance. METHODS The prognostic value and immune relevance of PTK6 were investigated by using bio-informatics in this study. PTK6 expression was validated in vitro experiments (lung cancer cell lines PC9, NCI-H1975, and HCC827; human normal lung epithelial cells BEAS-2B). Western blot (WB) revealed the PTK6 protein expression in lung cancer cell lines. PTK6 expression was inhibited by Tilfrinib. Colony formation and the Cell Counting Kit-8 (CCK-8) assay were used to detect cell proliferation. The wound healing and trans-well were performed to analyze the cell migration capacity. Then flow cytometry was conducted to evaluate the cell apoptosis. Eventually, the relationship between PTK6 and immune checkpoints was examined. WB was used to estimate the PD-L1 expression at different Tilfrinib doses. RESULTS PTK6 was an independent predictive factor for LUAD and was substantially expressed in LUAD. Pathological stage was significantly correlated with increased PTK6 expression. In accordance with survival analysis, poor survival rate in LUAD was associated with a high expression level of PTK6. Functional enrichment of the cell cycle and TGF-β signaling pathway was demonstrated by KEGG and GSEA analysis. Moreover, PTK6 expression considerably associated with immune infiltration in LUAD, as determined by immune analysis. Thus, the result of vitro experiments indicated that cell proliferation and migration were inhibited by the elimination of PTK6. Additionally, PTK6 suppression induced cell apoptosis. Obviously, PD-L1 protein expression level up-regulated while PTK6 was suppressed. CONCLUSION PTK6 has predictive value for LUAD prognosis, and could up regulated PD-L1.
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Affiliation(s)
- Ren-Hui Xiong
- School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Shuo-Qi Yang
- School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Ji-Wei Li
- School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Xun-Kai Shen
- School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Lu-Ming Jin
- Department of Thoracic Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Chao-Yang Chen
- Department of Thoracic Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Yu-Ting Yue
- School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Zhi-Chen Yu
- Department of Thoracic Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Qing-Yu Sun
- Department of Thoracic Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Wen Jiang
- Department of Thoracic Surgery, The First People's Hospital of Yunnan Province, Kunming, 650032, China
| | - Ming-Zheng Jiang
- School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Xiao-Yan Wang
- Department of Thoracic Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Shi-Xu Song
- School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Dai Cao
- School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Hong-Li Ye
- School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Li-Ran Zhao
- School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China
| | - Li-Peng Huang
- Department of Thoracic Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China.
| | - Liang Bu
- Department of Thoracic Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361000, Fujian, China.
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