• Jie Jiang, Chong Liu, Guoyong Xu, Tuo Liang, Chaojie Yu, Shian Liao, Zide Zhang, Zhaojun Lu, Zequn Wang, Jiarui Chen, Tianyou Chen, Hao Li, and Xinli Zhan.
• Guangxi Medical University, Department First School of Clinical Medicine.
• Medicine (Baltimore). 2021 Jan 29; 100 (4): e24484e24484.

BackgroundEwing sarcoma (ES), the second most prevalent bone malignant tumor has no widely known prognostic biomarker. Earlier studies have suggested that chaperonin containing TCP1 complex 6A (CCT6A), which encodes a molecular protein chaperone, is involved in the pathogenesis of many cancers. However, there are no known reports providing clear evidence of its role in ES pathogenesis.MethodsWe performed a bioinformatic analysis of 32 ES specimens from the GSE17618 dataset concentrating on the differences in gene expression, OS, event-free survival (EFS) in the different subgroups. Immunohistochemical studies were also performed to identify the expression levels of selected genes in ES and immediate paracancerous tissues.ResultsAfter 3 screenings, CCT6A was identified to be highly correlated with ES prognosis. Our survival analysis revealed a low overall survival (OS) for high CCT6A expression (P-value = .024). Our Cox regression analysis identified CCT6A expression, lEFS, and age were strongly associated with prognosis of ES. Our multivariate Cox regression analysis shows that CCT6A (P-value = .015), age (P-value = .026), and EFS (P-value = .002) were independent poor prognostic biomarkers. Our immunohistochemical analysis showed that the expression levels of CCT6A were significantly higher in ES tissues compared to the paracancerous tissues.ConclusionFrom the results of our study, we identified the expression levels of CCT6A to be strongly associated with prognosis of ES. Thus, the expression levels of the CCT6A gene could serve as a biomarker for the prediction of ES prognosis.Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

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