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Updated: May 24, 2026

Studying TGF-β Signaling and TGF-β-induced Epithelial-to-mesenchymal Transition in Breast Cancer and Normal Cells
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Repulsive guidance molecule B (RGMB) plays negative roles in breast cancer by coordinating BMP signaling

Jin Li1, Lin Ye, Andrew J Sanders

  • 1Metastasis & Angiogenesis Research Group, Cardiff University School of Medicine, Heath Park, Cardiff, UK.

Journal of Cellular Biochemistry
|March 15, 2012
PubMed

Insights

Repulsive guidance molecule B (RGMB) suppresses breast cancer progression. Knocking down RGMB enhances cancer cell proliferation, adhesion, and migration, indicating RGMB

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • Repulsive guidance molecules (RGMs) are crucial for axon guidance and iron homeostasis.
  • RGMs function as co-receptors for bone morphogenetic proteins (BMPs).
  • The specific role of RGMs, particularly RGMB, in breast cancer remains largely unelucidated.

Purpose of the Study:

  • To investigate the functional impact of RGMB on breast cancer cell behavior.
  • To elucidate the underlying molecular mechanisms by which RGMB influences breast cancer progression.

Main Methods:

  • RGMB was downregulated in breast cancer cells using an anti-RGMB ribozyme transgene.
  • Assessed cell proliferation, adhesion, and migration capacities.
  • Analyzed Caspase-3 activity, MAPK JNK pathway signaling, and Smad-dependent signaling pathways.

Main Results:

  • RGMB knockdown significantly enhanced breast cancer cell proliferation, adhesion, and migration.
  • RGMB deficiency led to reduced Caspase-3 expression/activity and improved cell survival during serum starvation.
  • Upregulation of Snai1, Twist, FAK, and Paxillin via Smad signaling was observed, correlating with increased adhesion and migration.

Conclusions:

  • RGMB acts as a negative regulator in breast cancer progression.
  • RGMB influences breast cancer cell functions, including proliferation, survival, adhesion, and migration, potentially through BMP signaling.
  • These findings highlight RGMB as a potential therapeutic target in breast cancer treatment.

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