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RNA Splicing01:32

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Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
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Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
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A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
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Resolving Spliceosomal Malfunctions Advances RNA-Based Therapeutics.

Zhao Zhang1, Shengli Li1, Leng Han2

  • 1Department of Biochemistry and Molecular Biology, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.

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|December 15, 2019
PubMed
Summary

Recent studies reveal recurrent mutations in spliceosomes, the cellular machinery for RNA splicing. These spliceosome mutations alter cancer-related gene splicing, promoting cancer development and suggesting new RNA-based cancer therapies.

Keywords:
RNA-based therapeuticsalternative splicingcancer genomicsspliceosomal mutation

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Area of Science:

  • Molecular Biology
  • Genomics
  • Cancer Research

Background:

  • Spliceosomes are essential molecular machines composed of small nuclear (sn)RNAs and proteins.
  • Cancer development involves complex genetic and molecular alterations.
  • Understanding gene regulation in cancer is crucial for therapeutic development.

Purpose of the Study:

  • To investigate the role of spliceosomal mutations in cancer.
  • To identify genome-wide splicing alterations induced by these mutations.
  • To explore the potential of targeting spliceosomes for novel anticancer therapies.

Main Methods:

  • Genome-wide analyses of large-scale tumor samples.
  • Identification of recurrent spliceosomal mutations.
  • Analysis of splicing alterations in cancer-related genes.

Main Results:

  • Recurrent spliceosomal mutations were identified across various cancer types.
  • These mutations led to widespread alterations in the splicing of cancer-related genes.
  • The identified splicing changes were linked to the promotion of malignancy.

Conclusions:

  • Spliceosomal mutations are a significant factor in cancer development.
  • Altered splicing patterns driven by spliceosome mutations contribute to tumorigenesis.
  • These findings highlight spliceosomes as potential targets for innovative RNA-based cancer treatments.