1
|
Liu X, Yuan R, Peng J, Xu A, Nie X, Tang R, Li G. SLMO2 is a potential prognostic and immunological biomarker in human pan-cancer. Sci Rep 2024; 14:1070. [PMID: 38212657 PMCID: PMC10784594 DOI: 10.1038/s41598-024-51720-5] [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: 06/06/2023] [Accepted: 01/09/2024] [Indexed: 01/13/2024] Open
Abstract
SLMO2 is a lipid transporter that transports phosphatidylserine to the interior of mitochondria, also known as PRELID3B, which plays an important role in lipid metabolism. It has also been reported to be involved in the growth process of breast and lung tumors. However, its functions and underlying mechanisms in cancer progress remain elusive, and the potential as pan-cancer biomarker and therapeutic target remains unexplored. Using the TCGA project and GEO database, we performed pan-cancer analysis of SLMO2, which including the expression pattern, prognostic value, mutation landscape, methylation modification, protein-protein interaction network and the relationship between SLMO2 expression and immune infiltration. KEGG enrichment analysis was also performed to predict function and relevant cellular pathways of SLMO2. In addition, proliferation and migration assays were performed to detect the proliferation and metastasis capacity of breast cancer and lung cancer cells. In our study, we found that SLMO2 was overexpressed in pan-cancer and the elevated expression of SLMO2 was correlated with poorer prognosis. SLMO2 mutations were distributed in a variety of tumors and correlated with prognosis. Promoter methylation analysis showed that SLMO2 methylation levels were lower in most tumors compared with normal tissues, while a few tumors showed increased methylation levels of SLMO2. SLMO2 expression was also positively correlated with immune infiltration of MDSCs. Further pathway enrichment analysis indicated that SLMO2 was involved in regulating of cytoplasmic transport and other oncogenic processes. In vitro experiments have shown that SLMO2 promotes the proliferation and migration of breast cancer and lung cancer cells. In conclusion, our findings suggested that SLMO2 was a potential prognostic and immunological marker in pan-cancer. This study suggested a potential strategy for targeting SLMO2 to treat tumors, including manipulating tumor growth or the tumor microenvironment, especially the infiltration of MDSC.
Collapse
Affiliation(s)
- Xiong Liu
- Clinical Laboratory, Hunan Aerospace Hospital, 189 Fenglin 3rd Road, Yuelu District, Changsha, 410205, Hunan, China.
- School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
| | - Renming Yuan
- Clinical Laboratory, Hunan Aerospace Hospital, 189 Fenglin 3rd Road, Yuelu District, Changsha, 410205, Hunan, China
| | - Jie Peng
- Clinical Laboratory, Hunan Aerospace Hospital, 189 Fenglin 3rd Road, Yuelu District, Changsha, 410205, Hunan, China
| | - Ailei Xu
- Clinical Laboratory, Hunan Aerospace Hospital, 189 Fenglin 3rd Road, Yuelu District, Changsha, 410205, Hunan, China
| | - Xiaoxia Nie
- Clinical Laboratory, Hunan Aerospace Hospital, 189 Fenglin 3rd Road, Yuelu District, Changsha, 410205, Hunan, China
| | - Ruiti Tang
- Clinical Laboratory, Hunan Aerospace Hospital, 189 Fenglin 3rd Road, Yuelu District, Changsha, 410205, Hunan, China.
| | - Guangqiang Li
- Biomedical Translational Research Institute, The First Affiliated Hospital, Jinan University, 601 W. Huangpu Ave., Guangzhou, 510632, Guangdong, China.
| |
Collapse
|
2
|
Guo X, Liang X, Wang Y, Cheng A, Qin C, Zhang H, Wang Z. Construction and Comprehensive Prognostic Analysis of a lncRNA-miRNA-mRNA Regulatory Network and Tumor Immune Cell Infiltration in Colorectal Cancer. Front Genet 2021; 12:652601. [PMID: 34276767 PMCID: PMC8281064 DOI: 10.3389/fgene.2021.652601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 06/11/2021] [Indexed: 11/25/2022] Open
Abstract
Colorectal cancer (CRC) is a malignant tumor with high morbidity and mortality worldwide. Recent studies have shown that long noncoding RNAs (lncRNAs) play an important role in almost all human tumors, including CRC. Competitive endogenous RNA (ceRNA) regulatory networks have become hot topics in cancer research. Tumor-infiltrating immune cells (TICs) have also been reported to be closely related to the survival and prognosis of CRC patients. In this study, we used the lncRNA–miRNA–mRNA regulatory network combined with tumor immune cell infiltration to predict the survival and prognosis of 598 CRC patients. First, we downloaded the lncRNA, mRNA, and miRNA transcriptome data of CRC patients from The Cancer Genome Atlas (TCGA) database and identified differentially expressed genes through “limma” package of R software. The ceRNA regulatory network was established by using the “GDCRNATools” R package. Then, univariate Cox analysis and least absolute shrinkage and selection operator analysis were performed to identify the optimal prognostic network nodes, including SRPX, UST, H19, SNHG7, hsa-miR-29b-3p, and TTYH3. Next, we analyzed the differences in 22 types of TICs between 58 normal subjects and 206 CRC patients and included memory CD4 T cells, dendritic cells and neutrophils in the construction of a prognostic model. Finally, we identified the relationship between the ceRNA prognostic model and the infiltrating immune cell prognostic model. In conclusion, we constructed two prognostic models that provide insights on the prognosis and treatment strategy of CRC.
Collapse
Affiliation(s)
- Xiong Guo
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaolong Liang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yujun Wang
- Department of Pathology, Daping Hospital, Army Military Medical University, Chongqing, China
| | - Anqi Cheng
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Chuan Qin
- Department of Gastrointestinal Surgery, Three Gorges Hospital, Chongqing University, Chongqing, China
| | - Han Zhang
- Department of Digestive Oncology, Three Gorges Hospital, Chongqing University, Chongqing, China
| | - Ziwei Wang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| |
Collapse
|