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Zeng X, Nong WX, Zou XQ, Li F, Ge YY, Zhang QM, Luo B, Huang W, Zou JX, Fan R, Xie XX. Prediction and identification of HLA-A*0201-restricted epitopes from cancer testis antigen CT23. Hum Vaccin Immunother 2023; 19:2293299. [PMID: 38100550 PMCID: PMC10730135 DOI: 10.1080/21645515.2023.2293299] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023] Open
Abstract
Cancer-testis antigen CT23 is a class of tumor-associated antigens (TAA) characterized by restricted expression in male germ cells and a variety of tumor tissues. Numerous studies have shown that CT23 is closely related to tumor cell viability, proliferation, metastasis and invasion. CT23 is immunogenic and can cause specific immune response in tumor patients. Therefore, it is considered to be one of the best target antigens for designing therapeutic tumor vaccines and T-cell-mediated tumor immunotherapy. In this study, we initially obtained seven HLA-A*0201-restricted CT23 epitope candidate peptides through the T cell epitope prediction program. Subsequently, a T2 cell binding assay revealed the potential binding of all candidate peptides with HLA-A2 molecules. Notably, peptide P7 (ALLVLCYSI) exhibited the highest affinity, as evidenced by a fluorescence index (FI) of 2.19. Dendritic cells (DCs) loaded with CT23 candidate peptide can stimulate CD8+T cell activation and proliferation, and compared with other candidate peptides, candidate peptide P7 is superior. The cytotoxic T lymphocytes (CTLs) stimulated by the peptide P7 had killing effect on tumor cells (HLA-A*0201+, CT23+), but no killing effect on tumor cells (HLA-A*0201-, CT23+). The CTLs induced by the peptide P7 also had a specific killing effect on T2 cells bearing the peptide P7. In summary, our findings suggest that the CT23 peptide P7 (ALLVLCYSI) can induce immune responses and holds potential for tumor-specific CTL therapy.
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Affiliation(s)
- Xia Zeng
- Department of Immunology, School of Basic Medicine Science, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
| | - Wei-Xia Nong
- Department of Histology and Embryology, School of Basic Medicine Science, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
| | - Xiao-Qiong Zou
- Department of Histology and Embryology, School of Basic Medicine Science, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
| | - Feng Li
- Department of Histology and Embryology, School of Basic Medicine Science, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
| | - Ying-Ying Ge
- Department of Histology and Embryology, School of Basic Medicine Science, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
| | - Qing-Mei Zhang
- Department of Histology and Embryology, School of Basic Medicine Science, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
- Education Department of Guangxi Zhuang Autonomous Region, Key Laboratory of Basic Research on Regional Diseases (Guangxi Medical University), Nanning, P. R. China
| | - Bin Luo
- Department of Histology and Embryology, School of Basic Medicine Science, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
- Education Department of Guangxi Zhuang Autonomous Region, Key Laboratory of Basic Research on Regional Diseases (Guangxi Medical University), Nanning, P. R. China
| | - Wei Huang
- Department of Gynecology, First Affiliated Hospital, Guangxi University of Traditional Chinese Medicine, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
| | - Jian-Xia Zou
- Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
| | - Rong Fan
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi University of Traditional Chinese Medicine, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
| | - Xiao-Xun Xie
- Department of Histology and Embryology, School of Basic Medicine Science, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, P. R. China
- Education Department of Guangxi Zhuang Autonomous Region, Key Laboratory of Basic Research on Regional Diseases (Guangxi Medical University), Nanning, P. R. China
- Ministry of Education, Key Laboratory of Early Prevention and Treatment of Regional High Frequency Tumor (Guangxi Medical University), Nanning, P. R. China
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Ning W, Huang M, Wu S, Wang H, Yao J, Ge Y, Tang Y, Sun K, Xie X, Hu Q. CT23 knockdown attenuating malignant behaviors of hepatocellular carcinoma cell is associated with upregulation of metallothionein 1. Cell Biol Int 2021; 45:1231-1245. [PMID: 33559934 DOI: 10.1002/cbin.11567] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 01/27/2021] [Accepted: 02/07/2021] [Indexed: 12/17/2022]
Abstract
The cancer-testis antigen 23 (CT23) gene has been reported in association with the pathogenesis and progress of hepatocellular carcinoma (HCC). However, the alterations of gene expression profiling induced by CT23 knockdown in HCC cells remains largely unknown. In this study, the RNA interfering (RNAi) method was used to silence CT23 expression in BEL-7404 cells. Microarray analysis was performed on mRNA extracted from the CT23 knockdown cells and the control cells to determine the alterations of gene expression profiles. The result showed a total of 1051 genes expressed differentially (two-fold change), including 470 genes upregulated and 581 gene downregulated in the CT23 knockdown cells. A bioinformatic analysis showed that the functional differentially expressed genes (DEGs) were linked to cell proliferation, migration, and apoptosis, and metallothionein 1 (MT1) attained the maximum enrichment scores in functional annotation, classification, and pathway analysis of DEGs. Furthermore, Western blot analysis and cell behaviors assays verified that CT23 modulates cell proliferation, migration, and apoptosis by regulating MT1 expression in HCC cells and non-neoplastic hepatocytes. In summary, downregulated CT23 gene in BEL-7404 cells might change the expressions of carcinogenesis and progression related genes in HCC by upregulating MT1 expression, which would provide insight into searching for a novel therapeutic target for HCC.
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Affiliation(s)
- Wanjing Ning
- Department of Cell Biology and Genetics, School of Pre-clinical Medicine, Guangxi Medical University, Nanning, China
| | - Miao Huang
- Radiology Department, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Shengming Wu
- Department of Pathology, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Hong Wang
- Department of Cell Biology and Genetics, School of Pre-clinical Medicine, Guangxi Medical University, Nanning, China
| | - Jiali Yao
- Department of Cell Biology and Genetics, School of Pre-clinical Medicine, Guangxi Medical University, Nanning, China
| | - Yingying Ge
- Department of Histology and Embryology, School of Pre-clinical Medicine, Guangxi Medical University, Nanning, China
| | - Yulu Tang
- Department of Cell Biology and Genetics, School of Pre-clinical Medicine, Guangxi Medical University, Nanning, China
| | - Kejian Sun
- Department of Cell Biology and Genetics, School of Pre-clinical Medicine, Guangxi Medical University, Nanning, China
| | - Xiaoxun Xie
- Department of Histology and Embryology, School of Pre-clinical Medicine, Guangxi Medical University, Nanning, China
| | - Qiping Hu
- Department of Cell Biology and Genetics, School of Pre-clinical Medicine, Guangxi Medical University, Nanning, China
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