MicroRNAs in cancer

Gianpiero Di Leva1, Michela Garofalo, Carlo M Croce

  • 1Department of Molecular Virology, Immunology, and Medical Genetics, Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio 43210; email: michela.garofalo@osumc.edu , carlo.croce@osumc.edu.

Insights

MicroRNAs (miRNAs) regulate gene expression and are crucial in cellular processes. Their dysregulation is linked to cancer development, highlighting potential for targeted therapies.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cancer Research

Background:

  • MicroRNAs (miRNAs) are small noncoding RNAs regulating gene expression by inhibiting mRNA translation and stability.
  • miRNAs control fundamental cellular processes including inflammation, cell-cycle regulation, stress response, differentiation, apoptosis, and migration.
  • Dysregulation of miRNA activity is implicated in the development and progression of various cancers.

Purpose of the Study:

  • To provide a brief overview of miRNA genomics, biogenesis, and function.
  • To discuss the impact of miRNA dysregulation on cellular pathways driving cancer.
  • To explore the potential of miRNA-targeted therapies for cancer treatment.

Main Methods:

  • Review of existing literature on miRNA biology and cancer.
  • Analysis of cellular pathways affected by miRNA dysregulation.
  • Discussion of current and emerging miRNA-targeted therapeutic strategies.

Main Results:

  • miRNAs are integral regulators of nearly all intracellular signaling circuits.
  • Aberrant miRNA expression patterns are a hallmark of cancer cells.
  • Specific miRNAs can promote or suppress tumor development depending on their targets.

Conclusions:

  • Understanding miRNA function and dysregulation is key to comprehending cancer biology.
  • miRNA-based molecular therapies offer promising avenues for cancer treatment.
  • Further research into miRNA genomics and targeted interventions is warranted.

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
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