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The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
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Nonenzymatically modified mRNA for regulating translation and apoptosis by modulating Cancer epigenetics.

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Researchers developed a nonenzymatic method to extend mRNA 3' ends using modified guanosine derivatives. The sugar-modified 2'O-Me-2-amino-IM compound enhanced mRNA expression and stability, showing potential for cancer therapy by inducing apoptosis.

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ApoptosisIn-vitro transcription and translationModified nucleotidesNonenzymatic 3`end extension of mRNAcancer epigenetics

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cancer Research

Background:

  • The 3' poly(A) tail of mRNA is crucial for stability and translation.
  • Nonenzymatic methods offer alternative strategies for mRNA modification.
  • EZH2 is a key regulator in oncogene suppression and cancer epigenetics.

Purpose of the Study:

  • To develop a nonenzymatic method for extending mRNA 3' ends using imidazole-activated guanosine derivatives.
  • To evaluate the impact of these modifications on mRNA translation, stability, and gene expression.
  • To assess the therapeutic potential of modified apoptin mRNA in cancer cells by monitoring apoptosis and EZH2 expression.

Main Methods:

  • Nonenzymatic 3' end mRNA extension using imidazole-activated guanosine derivatives (GMP-2-amino-IM, 2'O-Me-2-amino-IM, N7-(2-MePy)-GMP-IM).
  • Cell studies using GFP, Luciferase, and Apoptin genes.
  • Assays included cell imaging, fluorescence, luminescence, western blot, and RT-qPCR.
  • Transfection of cancer cells with modified apoptin mRNA to induce and monitor apoptosis.

Main Results:

  • The sugar-modified 2'O-Me-2-amino-IM compound significantly enhanced mRNA expression levels and stability compared to control and other tested compounds.
  • Nonenzymatically modified apoptin mRNAs successfully induced apoptosis in cancer cells.
  • Selective modulation of EZH2 expression was observed.

Conclusions:

  • 2'O-Me-2-amino-IM is an effective imidazole-activated guanosine derivative for nonenzymatic mRNA 3' end extension.
  • Modified apoptin mRNA demonstrates potential as a therapeutic agent for cancer treatment.
  • This approach offers a novel strategy for cancer therapy by inducing apoptosis and modulating EZH2 expression.