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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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...
MicroRNAs01:22

MicroRNAs

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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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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Characterization of Functionally Associated miRNAs in Glioblastoma and their Engineering into Artificial Clusters for Gene Therapy
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Normal and oncogenic roles for microRNAs in the developing brain.

Africa Fernandez-L1, Paul A Northcott, Michael D Taylor

  • 1Department of Cancer Biology and Genetics and Brain Tumor Center, Memorial Sloan-Kettering Cancer Center, New York, NY, USA.

Cell Cycle (Georgetown, Tex.)
|November 11, 2009
PubMed
Summary

MicroRNAs (miRNAs) are crucial for brain development and can contribute to medulloblastoma, a pediatric brain tumor. Research is uncovering miRNA roles in tumor development and potential therapeutic targets.

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Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Oncology

Background:

  • MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression.
  • Altered miRNA expression is implicated in tumorigenesis.
  • Medulloblastoma, a pediatric brain tumor, arises from cerebellar neural progenitor cells.

Purpose of the Study:

  • To review the role of miRNAs in normal mammalian brain development.
  • To explore the involvement of miRNAs in medulloblastoma pathogenesis.
  • To identify potential miRNA-based therapeutic strategies for medulloblastoma.

Main Methods:

  • Literature review of recent studies on miRNAs in medulloblastoma and brain development.
  • Analysis of miRNA expression profiling data from mouse and human medulloblastomas.

Main Results:

  • miRNAs are key regulators in mammalian development and tumorigenesis.
  • miRNA signatures correlate with medulloblastoma molecular subgroups, diagnosis, and treatment response.
  • Specific miRNAs represent potential therapeutic targets for medulloblastoma.

Conclusions:

  • Understanding miRNA roles in brain development and medulloblastoma is vital for targeted therapies.
  • miRNA profiling offers insights into medulloblastoma subtypes and treatment outcomes.
  • Further research into miRNAs may lead to more effective and less toxic treatments for pediatric brain tumors.