International Journal of General Medicine (Jan 2022)
Long Non-Coding RNA Signatures Associated with Ferroptosis Predict Prognosis in Colorectal Cancer
Abstract
Na Li,1 Jiangli Shen,1 Ximin Qiao,2 Yuan Gao,3 Hong-Bo Su,4 Shuai Zhang5 1Department of Anorectal Surgery, Xianyang Central Hospital, Xianyang, Shaanxi Province, People’s Republic of China; 2Dean’s Office, Xianyang Central Hospital, Xianyang, Shaanxi Province, People’s Republic of China; 3Surgery Department, Xianyang Central Hospital, Xianyang, Shaanxi Province, People’s Republic of China; 4The Second Ward of the Anorectal Hospital, Xi’an Hospital of TCM, Xi’an, Shaanxi Province, People’s Republic of China; 5Journal Editorial Board, Hebei University of Chinese Medicine, Hebei, People’s Republic of ChinaCorrespondence: Hong-Bo Su; Shuai Zhang Email [email protected]; [email protected]: Currently, colorectal cancer has become a common gastrointestinal malignancy that usually occurs in the colon and rectum, and ferroptosis plays a vital role in the pathology and progression of colorectal tumors.Methods: A total of 627 patients (51 normal and 644 tumor samples) from The Cancer Genome Atlas (TCGA)-COAD and TCGA-READ were included in the study. Lasso and Cox’s regression was employed to analyze the characteristic lncRNAs in colorectal cancer samples, and a distinctive prognostic model of ferroptosis-related lncRNAs was established. By analyzing the divergence between the high and low-risk groups of ferroptosis-related lncRNAs, 15 characteristic lncRNAs related to the prognosis of colorectal cancer were evaluated. Kaplan–Meier analysis, operation characteristic curve (ROC), nomogram, and gene set enrichment analyses (GSEA) further confirmed the validity of the characteristic prognostic model with ferroptosis-related lncRNAs.Results: Kaplan–Meier analysis confirmed a high-risk group of ferroptosis-related lncRNA interrelated with a poor prognosis in colorectal cancer. AUC estimates of 1 -, 3 -, and 5-year survival rates for ferroptosis-related lncRNA characteristic models were 0.745, 0.767 and 0.789. GSEA analysis showed that immune and malignancy-related pathways were active in the high-risk score group. In addition, differential analyses of immune function, including Checkpoint, cytolytic, HLA, and T cell co-inhibition, differed significantly betwixt low - and high-risk groups.CD160, TNFRSF18, CD27, PDCD1, CD200R1, ADORA2A, TNFRSF14, LAIR1, CD244, CD40, TNFRSF4, CD70, TNFSF14, TNFRSF25, CD276, HHLA2, VTCN1, LAG3, TNFSF18, and other immune checkpoints had different expressions betwixt the high- and low-risk group.Conclusion: Fifteen kinds of lncRNAs with different expressions (AP003555.1, AC099850.3, AL031985.3, LINC01857, STPG3-AS1, AL137782.1, AC124067.4, AC012313.5, AC083900.1, AC010973.2, ALMS1-IT1, AC013652.1, AC133540.1, AP006621.2, AC018653.3) were closely associated with poor prognosis of colorectal cancer. These indicators were significantly correlated with the overall survival (OS) rate and could be used as prognostic evaluation criteria.Keywords: colorectal cancer, ferroptosis, lncRNAs, immune infiltration, TCGA
