Open AccessIdentification of RORγ as a favorable biomarker for colon cancer
Author(s) -
Xiaofei Pan,
Bao Li,
Gan Zhang,
Yuyong Gong,
Rui Li,
Benxin Chen,
Yang Li
Publication year - 2021
Publication title -
journal of international medical research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 57
eISSN - 1473-2300
pISSN - 0300-0605
DOI - 10.1177/03000605211008338
Subject(s) - colorectal cancer , medicine , microsatellite instability , perineural invasion , metastasis , dna methylation , biomarker , oncology , real time polymerase chain reaction , clinical significance , methylation , cancer , lymphovascular invasion , carcinogenesis , cancer research , pathology , gene expression , microsatellite , biology , gene , genetics , allele
Objective To evaluate the expression of retinoid-related orphan receptor gamma (RORγ) and its potential role in the prognosis of colon cancer.Methods The Cancer Genome Atlas and GSE117606 were used to evaluate to RORγ levels in colon cancer, and real-time quantitative polymerase chain reaction was applied for validation. UALCAN and MEXPRESS were used to analyze the associations of RORγ expression with clinical parameters. The survival analysis was conducted in GEPIA.Results RORγ expression was significantly lower in colon tumors than in adjacent normal mucosa tissues. RORγ expression was significantly associated with tumor stage, lymph node metastasis, and liver metastasis. The area under the curve for diagnosis was 0.71. Decreased RORγ expression was positively correlated with the incidence of lymphatic invasion, microsatellite instability, the presence of residual tumor, venous invasion, and copy number variation. Overall survival was longer in patients with higher RORγ expression, especially those with microsatellite instability-high features. Methylation analysis revealed that hypermethylation of the RORγ promoter was associated with the colon cancer stage.Conclusions RORγ downregulation could be a potential biomarker for colon cancer, especially for predicting prognosis. Decreased RORγ expression in colon tumor may be associated with promoter hypermethylation.