Entangling Relation of Micro RNA-let7, miRNA-200 and miRNA-125 with Various Cancers

Area of Science:

• Molecular Biology
• Genetics
• Oncology

Background:

• MicroRNAs (miRNAs) regulate gene expression post-transcriptionally.
• Dysregulation of specific miRNAs is implicated in various cancers.
• The let-7, miRNA-200, and miRNA-125 families are crucial in cellular processes relevant to cancer.

Purpose of the Study:

• To review the role of let-7, miRNA-200, and miRNA-125 in cancer.
• To elucidate the mechanisms by which these miRNAs affect gene expression and cellular behavior in cancer.
• To summarize their altered expression patterns in different cancer types.

Main Methods:

• Literature review of studies on miRNA involvement in cancer.
• Analysis of the functional roles of let-7, miRNA-200, and miRNA-125.
• Examination of gene targets and pathways affected by these miRNAs.

Main Results:

• Let-7 family miRNAs are involved in cell proliferation and cancer development.
• miRNA-200 family members inhibit epithelial-mesenchymal transition (EMT), preventing malignant transformation.
• miRNA-125 regulates apoptosis and proliferation, impacting multiple cancer-related genes.

Conclusions:

• These key miRNA families are frequently dysregulated (upregulated or downregulated) in various cancers.
• The discussed miRNAs are predominantly downregulated in cancer, with notable exceptions like miRNA-125, which can be upregulated, contributing to cancer formation.