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Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells
10:06

Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells

Published on: April 26, 2017

Antisense-mediated exon skipping to shift alternative splicing to treat cancer

Jing Wan1

  • 1University of North Carolina, Chapel Hill, NC, USA. jingwan@med.unc.edu

Methods in Molecular Biology (Clifton, N.J.)
|March 29, 2012
PubMed

Insights

Researchers modified HER2 pre-mRNA alternative splicing using a splice switching oligonucleotide (SSO). This targeted HER2 exon 15, reducing full-length HER2 mRNA and protein in breast cancer cells.

Area of Science:

  • Molecular Biology
  • Gene Expression Regulation
  • Cancer Therapeutics

Background:

  • Alternative splicing is a key mechanism for gene expression regulation.
  • HER2 overexpression is a hallmark of certain aggressive breast cancers, driving tumor growth.
  • Targeting HER2 expression is a validated therapeutic strategy in breast cancer treatment.

Purpose of the Study:

  • To present a detailed protocol for modifying HER2 pre-mRNA alternative splicing.
  • To investigate the efficacy of splice switching oligonucleotides (SSOs) in downregulating HER2.
  • To evaluate the impact of HER2 splicing modulation on cancer cell expression.

Main Methods:

  • Design and application of a 20-mer splice switching oligonucleotide (SSO).
  • Targeting of exon 15 in the human epidermal growth factor receptor 2 (HER2) pre-messenger RNA (pre-mRNA).
  • Assessment of HER2 messenger RNA (mRNA) and protein levels in the SK-BR-3 cell line.

Main Results:

  • The SSO successfully induced skipping of HER2 exon 15.
  • Significant downregulation of full-length HER2 mRNA was observed.
  • A corresponding reduction in HER2 protein expression was detected in SK-BR-3 cells.

Conclusions:

  • Modulation of HER2 alternative splicing via SSO is feasible.
  • Targeting HER2 exon 15 offers a novel strategy for reducing HER2 expression.
  • This approach holds potential for therapeutic intervention in HER2-overexpressing breast cancers.

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