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Studying TGF-β Signaling and TGF-β-induced Epithelial-to-mesenchymal Transition in Breast Cancer and Normal Cells
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Gremlin-1 induces BMP-independent tumor cell proliferation, migration, and invasion

Minsoo Kim1, Soomin Yoon, Sukmook Lee

  • 1Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Chongno-gu, Seoul, Republic of Korea.

Plos One
|April 20, 2012
PubMed

Insights

Gremlin-1 protein directly interacts with cancer cells, promoting migration, invasion, and proliferation. A novel antibody, GRE1, effectively inhibits these cancer-promoting effects, offering a potential therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Gremlin-1, a bone morphogenetic protein (BMP) antagonist, is overexpressed in many cancers.
  • Its specific role in cancer development (carcinogenesis) remains largely unestablished.

Purpose of the Study:

  • To investigate the direct interaction of gremlin-1 with cancer cells.
  • To determine the functional consequences of this interaction on cancer cell behavior.
  • To evaluate the efficacy of a novel gremlin-1 antibody (GRE1) in blocking these effects.

Main Methods:

  • Assessing gremlin-1 binding to various cancer cell lines.
  • Utilizing a newly developed gremlin-1 antibody (GRE1) to inhibit binding.
  • Evaluating the impact of gremlin-1 on cell morphology, E-cadherin expression, and cell migration (scratch wound healing assay).
  • Assessing the effects of gremlin-1 on cell invasiveness and proliferation.

Main Results:

  • Gremlin-1 directly binds to cancer cells independently of BMPs (BMP-2, BMP-4, BMP-7) and VEGFR2.
  • Gremlin-1 induces fibroblast-like morphology, decreases E-cadherin expression, and enhances cell migration, invasion, and proliferation in A549 cells.
  • The GRE1 antibody successfully inhibited gremlin-1-induced cell migration, invasion, and proliferation.

Conclusions:

  • Gremlin-1 directly interacts with cancer cells through a BMP- and VEGFR2-independent mechanism.
  • Gremlin-1 promotes key hallmarks of cancer: migration, invasion, and proliferation.
  • The GRE1 antibody demonstrates potential as a therapeutic agent by neutralizing gremlin-1's pro-cancer effects.

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