27 October 2021 : Database Analysis
[In Press] Low Expression of Long Noncoding RNA SLC26A4 Antisense RNA 1 Is an Independent Prognostic Biomarker and Correlate of Immune Infiltrates in Breast CancerWeiwei Yi1ABCEF, Haiqing Shen2BC, Dexi Sun3BC, Yongchao Xu4BC, Yujie Feng1BC, Dongbing Li5BC, Caixia Wang1ABCEF
Med Sci Monit In Press; DOI: 10.12659/MSM.934522
Available online: 2021-10-27, In Press, Corrected Proof
Publication in the "In-Press" formula aims at speeding up the public availability of the pending manuscript while waiting for the final publication. The assigned DOI number is active and citable. The availability of the article in the Medline, PubMed and PMC databases as well as Web of Science will be obtained after the final publication according to the journal schedule
Aberrant expression of long noncoding RNA (lncRNA) SLC26A4 antisense RNA 1 (SLC26A4-AS1) plays an important role in some cancer types. However, the clinical significance of SLC26A4-AS1 in patients with breast cancer (BC) and the possible regulatory mechanisms of SLC26A4-AS1 are unclear.
MATERIAL AND METHODS
Statistical analysis was used to assess the correlation between SLC26A4-AS1 expression and patients’ clinical characteristics. The Kaplan-Meier method and Cox regression analysis were used to assess the correlation between SLC26A4-AS1 expression and prognosis. Gene set enrichment analysis (GSEA) and immuno-infiltration analysis were used to investigate the possible regulatory mechanisms of SLC26A4-AS1.
Low SLC26A4-AS1 expression in BC was associated with age (P<0.001), estrogen-receptor status (P<0.001), PAM50 (P<0.001), and menopause status (P<0.001). Low SLC26A4-AS1 expression predicted a poorer overall survival (OS) (hazard ratio [HR]: 0.56; 95% confidence interval [CI]: 0.40-0.78; P=0.001) and disease-specific survival (DSS) (HR: 0.57; 95% CI: 0.37-0.88; P=0.011). Also, SLC26A4-AS1 expression (HR: 0.298; 95% CI: 0.154-0.579; P<0.001) was independently correlated with OS in patients with BC. SLC26A4-AS1 was related to CYP2E1 reactions, protein export, mitochondrial_ciii_assembly, formation of adenosine triphosphate by chemiosmotic coupling, budding and maturation of HIV virion, cristae formation, biocarta proteasome pathway, endosomal sorting complex required for transport, and histone modification. SLC26A4-AS1 expression was associated with some types of immune infiltrating cells.
SLC26A4-AS1 expression was significantly associated with poor survival and immune infiltration in patients with BC. It may be a promising prognostic biomarker for BC.
Keywords: Biomarkers, Tumor; Breast Neoplasms; Prognosis
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