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MicroRNA-552 expression in colorectal cancer and its clinicopathological significance

Journal of Pathology and Translational Medicine 2021년 55권 2호 p.125 ~ 131
Im Joon, 남수경, 이혜승,
소속 상세정보
 ( Im Joon ) - Seoul National University Bundang Hospital Department of Pathology
남수경 ( Nam Soo-Kyung ) - Seoul National University College of Medicine Seoul National University Hospital Department of Pathology
이혜승 ( Lee Hye-Seung ) - Seoul National University College of Medicine Seoul National University Hospital Department of Pathology

Abstract


Background: MicroRNA-552 (miR-552) has been reported to correlate with the development and progression of various cancers, including colorectal cancer (CRC). This study aimed to investigate miR-552 expression in cancer tissue samples compared to normal mucosal tissue and its role as a diagnostic or prognostic marker in CRC patients.

Methods: Normal mucosal tissues and primary cancer tissues from 80 surgically resected CRC specimens were used. Quantitative real-time polymerase chain reaction was performed for miR-552 and U6 small nuclear RNA to analyze miR-552 expression and its clinicopathological significance. Immunohistochemistry for p53 and phosphatase and tension homolog (PTEN) was performed to evaluate their association with miR-552 expression.

Results: miR-552 expression was significantly higher in primary cancer tissues compared to normal mucosal tissues (p<.001). The expression level of miR552 was inversely correlated with that of PTEN (p=.068) and p53 (p=.004). Survival analysis showed that high miR-552 expression was associated with worse prognosis but this was not statistically significant (p=.255). However, patients with CRC having high miR-552 expression and loss of PTEN expression had significantly worse prognosis than others (p=.029).

Conclusions: Our results suggest that high miR-552 expression might be a potential diagnostic biomarker for CRC, and its combined analysis with PTEN expression can possibly be used as a prognostic marker.

키워드

miR-552; Colorectal neoplasms; p53; PTEN; Prognosis

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