miR-155 as a diagnostic and prognostic marker in hematological and solid malignancies

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• MicroRNAs (miRNAs) are key regulators of gene expression in cellular responses.
• miRNAs show potential as diagnostic, prognostic, and therapeutic targets for various diseases, including cancer.
• miR-155 is a well-characterized oncomiR (cancer-associated miRNA) with roles in cell proliferation and apoptosis.

Purpose of the Study:

• To review the expressional regulation of the miR-155 host gene.
• To summarize the role of miR-155 in regulating target gene messenger RNAs (mRNAs).
• To highlight the clinical significance of miR-155 as a biomarker in cancer.

Main Methods:

• Literature review of miR-155 regulation and function.
• Analysis of studies reporting miR-155 expression in various diseases.
• Synthesis of data on miR-155's role as a diagnostic and prognostic marker.

Main Results:

• miR-155 expression is upregulated in cells with high proliferation and reduced apoptosis.
• Altered miR-155 levels are observed in multiple cancers, correlating with staging, progression, and treatment outcomes.
• miR-155 is detectable in peripheral blood, suggesting its utility as a biomarker.

Conclusions:

• miR-155 is a multifunctional oncomiR with significant implications in cancer.
• Its altered expression patterns make it a promising biomarker for cancer detection, staging, and prognosis.
• Further clinical research is warranted to utilize miR-155 in patient management.