miR-559 rs58450758 polymorphism is associated with colorectal cancer risk and prognosis in Chinese Han population

<b>Aim:</b> This research examined the correlation between miR-559 rs58450758 and the clinical pathological characteristics and prognosis of CRC.<b>Materials & methods:</b> RT-qPCR was utilized to assess the miR-559 expression levels. Chi-square test was used to investigate the relationship between miR-559 and clinical features. The association between rs58450758 different genotypes and CRC risk, as well as clinical pathological parameters, was explored, utilizing logistic regression analysis and chi-square tests. The Cox regression model and Kaplan-Meier analysis evaluated overall survival in individuals with CRC.<b>Results:</b> The miR-559 was down-regulated in CRC patients' serum. The expressions of miR-559 were significantly associated with tumor size, differentiation, TNM stage and lymph node metastasis. The rs58450758 TT genotype and T allele carriers were more prevalent among CRC patients. The rs58450758 polymorphism was notably linked to tumor size, differentiation, TNM stage and lymph node metastasis in CRC patients. Furthermore, CC genotype carriers exhibited a longer survival period than CT/TT genotypes within the CRC population.<b>Conclusion:</b> The miR-559 rs58450758 polymorphism exhibits promise as a potential biomarker for prognosticating the outcomes of CRC.