Journal
AGING-US
Volume 14, Issue 2, Pages 747-769Publisher
IMPACT JOURNALS LLC
Keywords
CCT7; hepatocellular carcinoma; prognosis; diagnosis; spliceosome
Categories
Funding
- Key Project of the Natural Science Foundation of Fujian Province [2020Y0078]
- Surface Project of the Natural Science Foundation of Fujian Province [2020J011144]
- Civil-Military Integration Project of the 900th Hospital [2018J06]
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The expression level of CCT7 is higher in hepatocellular carcinoma (HCC) tissues compared to normal tissues, and this high expression is associated with poor prognosis. CCT7 expression remains higher in HCC tissues compared to normal tissues in early-stage disease and low alpha-fetoprotein expression patients, and it has better diagnostic value than alpha-fetoprotein. Higher CCT7 expression is also associated with poorer overall and recurrence-free survival in HCC patients.
Chaperonin containing TCP1 subunit 7 (CCT7) regulates the expression of many tumor-related proteins. We investigated the diagnostic and prognostic value of CCT7 expression for hepatocellular carcinoma (HCC). In datasets from The Cancer Genome Atlas and the Gene Expression Omnibus, CCT7 mRNA levels were greater in HCC tissues than adjacent normal tissues, and these results were validated using immunohistochemistry. In patients with early-stage disease and low alpha-fetoprotein expression, CCT7 expression was still higher in HCC tissues than normal tissues. Receiver operating characteristic curve analyses indicated that CCT7 expression had better diagnostic value than alpha-fetoprotein for HCC patients with early-stage disease and low alphafetoprotein expression. The positive predictive value of CCT7 expression was higher than that of alphafetoprotein expression. Higher CCT7 mRNA and protein levels were independent risk factors for poorer overall and recurrence-free survival in HCC patients. Greater methylation of the CpG site cg19515186 was associated with better overall survival in HCC patients. Genes co-expressed with CCT7 were upregulated in HCC and associated with poorer overall survival. Gene Ontology, Kyoto Encyclopedia of Genes and Genomes and Gene Set Enrichment Analyses demonstrated that CCT7 expression correlated with spliceosome signaling. These findings demonstrate that CCT7 has diagnostic and prognostic value for HCC.
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