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Ohhara Y, Tomaru U, Kinoshita I, Hatanaka KC, Noguchi T, Hatanaka Y, Amono T, Matsuno Y, Dosaka-Akita H. Polymorphisms of the PD-L1 gene 3'-untranslated region are associated with the expression of PD-L1 in non-small cell lung cancer. Genes Chromosomes Cancer 2024; 63:e23216. [PMID: 38169142 DOI: 10.1002/gcc.23216] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 09/01/2023] [Accepted: 11/29/2023] [Indexed: 01/05/2024] Open
Abstract
Recent results show that polymorphisms of programmed death ligand 1 (PD-L1, also known as CD274 or B7-H1) might be used as a possible marker for effectiveness of chemotherapy and cancer risk. However, the effect of PD-L1 gene variations on PD-L1 expression remain unclear. Given the post-transcriptional machinery in tumor PD-L1 expression, we investigated single nucleotide polymorphisms (SNPs) in the 3'-untranslated region (3'-UTR) of the PD-L1 gene, rs4143815 and rs4742098, using formalin-fixed paraffin-embedded sections of 154 patients with non-small cell lung cancers (NSCLCs). In rs4143815, the GG genotype showed significant association with PD-L1 expression (P = 0.032). In rs4742098, the AA genotype was significantly associated with histology and PD-L1 expression (P = 0.022 and P = 0.008, respectively). In multivariate logistic regression analysis, the AA genotype in rs4742098 was correlated with PD-L1 expression (odds ratio 0.408, P = 0.048). Interestingly, approximately 10% of the NSCLC cases showed somatic mutation when we compared genotypes of these SNPs between NSCLC tissues and non-tumor tissues from the same patients. In addition, cases with somatic mutation showed higher levels of PD-L1 expression than cases with germline mutation in rs4143815 GG. In conclusion, we demonstrated that the rs4143815 and rs4742098 SNPs in the 3'-UTR of PD-L1 were associated with tumor PD-L1 expression in NSCLCs.
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Affiliation(s)
- Yoshihito Ohhara
- Department of Medical Oncology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Utano Tomaru
- Department of Surgical Pathology, Hokkaido University Hospital, Sapporo, Japan
| | - Ichiro Kinoshita
- Department of Medical Oncology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
- Division of Clinical Cancer Genomics, Hokkaido University Hospital, Sapporo, Japan
| | - Kanako C Hatanaka
- Research Division of Genome Companion Diagnostics, Hokkaido University Hospital, Sapporo, Japan
- Center for Development of Advanced Diagnostics, Hokkaido University Hospital, Sapporo, Japan
| | - Takuro Noguchi
- Department of Medical Oncology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yutaka Hatanaka
- Research Division of Genome Companion Diagnostics, Hokkaido University Hospital, Sapporo, Japan
| | - Toraji Amono
- Clinical Research and Medical Innovation Center, Hokkaido University Hospital, Sapporo, Japan
| | - Yoshihiro Matsuno
- Department of Surgical Pathology, Hokkaido University Hospital, Sapporo, Japan
| | - Hirotoshi Dosaka-Akita
- Department of Medical Oncology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
- Research Division of Cancer Immunotherapy, Hokkaido University Hospital, Sapporo, Japan
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