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Updated: May 21, 2026

Detection of a Circulating MicroRNA Custom Panel in Patients with Metastatic Colorectal Cancer
Published on: March 14, 2019
The role of microRNAs in colorectal cancer
Aaron J Schetter1, Hirokazu Okayama, Curtis C Harris
1Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
Abstract:
During the last decade, it has become clear that aberrant microRNA expression has a functional role in the initiation and progression of colorectal cancer (CRC). Specific microRNAs can act as either tumor suppressors or oncogenes depending on the cellular environment in which they are expressed. The expression of microRNAs is reproducibly altered in CRC, and their expression patterns are associated with diagnosis, prognosis, and therapeutic outcome in CRC. Studies have begun to examine the association of microRNA-related polymorphisms and their association with CRC incidence and prognosis as well as the possibility of using circulating microRNAs or fecal microRNA expression as noninvasive early detection biomarkers. These data suggest that microRNAs may be potential molecular classifiers, early detection biomarkers, and therapeutic targets for CRC. Here, we will review the evidence demonstrating a role of microRNAs in CRC.
Insights
Aberrant microRNA expression plays a key role in colorectal cancer (CRC) development and progression. These microRNAs show potential as diagnostic, prognostic, and therapeutic tools for CRC.
Area of Science:
- Molecular biology
- Oncology
- Genetics
Background:
- Aberrant microRNA (miRNA) expression is increasingly recognized for its role in colorectal cancer (CRC) initiation and progression.
- MicroRNAs can function as tumor suppressors or oncogenes, contingent upon the cellular context.
- Altered miRNA expression patterns in CRC correlate with diagnosis, prognosis, and treatment outcomes.
Purpose of the Study:
- To review the evidence implicating microRNAs in the development and progression of colorectal cancer.
- To highlight the potential of microRNAs as biomarkers and therapeutic targets for CRC.
Main Methods:
- Literature review of studies investigating microRNA expression in colorectal cancer.
- Analysis of research on microRNA-related polymorphisms and their association with CRC.
- Examination of studies exploring circulating and fecal microRNAs as noninvasive biomarkers.
Main Results:
- MicroRNA expression is consistently altered in CRC.
- MicroRNA expression patterns are linked to clinical outcomes and therapeutic responses.
- MicroRNA polymorphisms are associated with CRC incidence and prognosis.
- Circulating and fecal microRNAs show promise as noninvasive early detection biomarkers.
Conclusions:
- MicroRNAs are integral to colorectal cancer pathogenesis.
- MicroRNAs represent promising candidates for molecular classification, early detection, and targeted therapy in CRC.
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