Circulating microRNA-203 predicts prognosis and metastasis in human colorectal cancer

Area of Science:

• Oncology
• Molecular Biology
• Biomarker Discovery

Background:

• Distant metastasis is a primary cause of mortality in colorectal cancer (CRC).
• Lack of robust metastasis-predictive biomarkers hinders effective treatment strategies.
• The role of microRNA-203 (miR-203) in CRC metastasis is not well understood.

Purpose of the Study:

• To evaluate serum miR-203 as a non-invasive biomarker for predicting colorectal cancer metastasis.
• To investigate the clinical significance of miR-203 in CRC metastasis.

Main Methods:

• Quantitative reverse-transcription PCR was used to measure miR-203 expression in tumor tissues and serum from CRC patients.
• Expression levels were analyzed in relation to clinicopathological features and survival outcomes.
• Mouse models were utilized to identify the source of circulating miR-203.

Main Results:

• miR-203 expression was significantly upregulated in liver metastasis compared to primary CRC tissues.
• Serum miR-203 levels increased with cancer stage and were associated with poor survival in both patient cohorts.
• Elevated serum miR-203 levels correlated with increased risk of lymph node, liver, peritoneal, and distant organ metastasis.

Conclusions:

• High serum miR-203 levels are associated with poor prognosis and metastasis in colorectal cancer patients.
• Serum miR-203 shows promise as a non-invasive prognostic and metastasis-predictive biomarker for CRC.