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Updated: Jul 15, 2026

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Gab2 antisense oligonucleotide blocks rat basophilic leukemic cell functions.

Jasmine H P Chan1, Wupeng Liao, H Y Alaster Lau

  • 1Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.

International Immunopharmacology
|May 15, 2007
PubMed
Summary

An antisense oligonucleotide (ASO) targeting Gab2 effectively reduced mast cell activation and degranulation. This Gab2 ASO suppressed key signaling pathways and cytokine release, indicating therapeutic potential for allergic disorders.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Pharmacology

Background:

  • Grb2-associated binder-like protein 2 (Gab2) is crucial for mast cell activation via FcepsilonRI.
  • Mast cell degranulation and activation are central to allergic responses.

Purpose of the Study:

  • To investigate the effects of a Gab2-targeted antisense oligonucleotide (ASO) on mast cell immune responses.
  • To evaluate the therapeutic potential of Gab2 ASO for mast cell-dependent allergic disorders.

Main Methods:

  • Gab2 ASOs were designed and transfected into rat basophilic leukemic (RBL)-2H3 cells.
  • Gab2 mRNA and protein knockdown were confirmed using RT-PCR and immunoblotting.
  • Mast cell degranulation, signaling pathways, cytokine expression, adhesion, and migration were assessed.

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Main Results:

  • Gab2 ASO successfully reduced Gab2 mRNA and protein levels in RBL-2H3 cells.
  • Gab2 ASO significantly inhibited IgE-mediated release of histamine and beta-hexosaminidase.
  • Gab2 ASO suppressed key signaling molecules (Akt, p38 MAPK, PKCdelta) and cytokine mRNA expression (IL-4, IL-6, IL-9, IL-13, TNF-alpha).
  • Gab2 ASO also reduced mast cell adhesion and migration.

Conclusions:

  • Gab2 knockdown using ASO strategy effectively suppresses mast cell functions.
  • A selective Gab2 ASO demonstrates potential as a therapeutic agent for allergic diseases.