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Discovery of Driver Genes in Colorectal HT29-derived Cancer Stem-Like Tumorspheres
Published on: July 22, 2020
[SIGNIFICANCE OF NONCODING RNAS IN COLORECTAL CANCER: REVIEW]
Abstract:
Recent advances in the field of RNA research have shown that microRNAs (MiRNAs) are among noncoding RNAs that function in posttranscriptional regulation of target gene expression via base-pairing with complementary sequences in mRNAs to induce mRNA degradation and translational inhibition. Together with several causes of colorectal cancer (CRC) initiation and progression which are regulated by both genetic and epigenetic modifications, aberrant expression of oncogenic and tumor suppressor MiRNAs in cancer cells was found to be up- or downregulated by targeted mRNAs specific to tumor promoter or inhibitor genes. In particular, the study of MiRNAs as CRC biomarkers utilizes expression profiling methods from tissue samples along with newly introduced noninvasive samples of feces and body fluids, since MiRNAs are known to be extremely stable under several conditions. Additionally, MiRNAs could be employed to predict chemo- and radiotherapy responses and be manipulated in order to alleviate CRC characteristics. This article introduces progress in the utilization of MiRNAs as noninvasive biomarkers for cancer detection, estimation of recurrence and prognosis, and prediction of chemotherapeutic agent response in CRC. It also discusses the obstacles that have limited the routine use of MiRNA biomarkers in the clinical setting.
Insights
MicroRNAs (MiRNAs) show promise as noninvasive biomarkers for colorectal cancer (CRC) detection, prognosis, and treatment response prediction. Their stability and detectability in various samples offer new avenues for early cancer diagnosis and management.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Context:
- MicroRNAs (MiRNAs) are key regulators of gene expression involved in various biological processes.
- Colorectal cancer (CRC) development is influenced by genetic and epigenetic alterations, including aberrant miRNA expression.
- MiRNAs are stable molecules detectable in various biological samples, making them attractive biomarkers.
Purpose:
- To review the progress and potential of miRNAs as noninvasive biomarkers for colorectal cancer (CRC).
- To discuss the application of miRNAs in cancer detection, recurrence estimation, prognosis, and prediction of treatment response.
- To highlight the challenges hindering the clinical implementation of miRNA biomarkers.
Summary:
- MiRNAs regulate gene expression post-transcriptionally and their aberrant expression is linked to CRC initiation and progression.
- Expression profiling of miRNAs from tissues, feces, and body fluids can aid in CRC detection and monitoring.
- MiRNAs can predict response to chemotherapy and radiotherapy and may be therapeutically manipulated.
Impact:
- MiRNA biomarkers could revolutionize early CRC detection, leading to improved patient outcomes.
- Noninvasive miRNA detection may reduce the need for invasive diagnostic procedures.
- Understanding miRNA roles in CRC can pave the way for novel therapeutic strategies.
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