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[Tumor metastasis and cell adhesion molecules].

J Murata1, I Saiki

  • 1Dept. of Pathogenic Biochemistry, Research Institute for Wakan-yaku, Toyama Medical and Pharmaceutical University.

Gan to Kagaku Ryoho. Cancer & Chemotherapy
|May 11, 1999
PubMed
Summary

Synthetic poly (Arg-Gly-Asp) polypeptides effectively inhibited tumor metastasis by blocking cell adhesion. This anti-adhesive approach shows promise for preventing cancer spread without harming cells.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Oncology

Context:

  • Tumor metastasis involves critical adhesive interactions between cancer cells, host cells, and the extracellular matrix (ECM).
  • Integrin receptors on tumor cells mediate these adhesive interactions.
  • Targeting these interactions is a key strategy in developing anti-metastatic therapies.

Purpose:

  • To investigate the efficacy of synthetic poly (Arg-Gly-Asp) (poly (RGD)) polypeptides in preventing tumor metastasis.
  • To determine the mechanism by which poly (RGD) inhibits metastasis.
  • To assess the safety profile of poly (RGD) in preclinical models.

Summary:

  • Poly (RGD) was synthesized as a repetitive Arg-Gly-Asp (RGD) sequence to antagonize ECM-integrin interactions on tumor cells.
  • Poly (RGD) significantly inhibited experimental lung and liver metastasis across various tumor types when co-injected intravenously.
  • In a spontaneous lung metastasis model, poly (RGD) administration reduced lung colonization, even after primary tumor removal.
  • The inhibitory mechanism involves interference with tumor cell adhesiveness, motility, and invasiveness.
  • Poly (RGD) demonstrated no cytotoxicity to host or tumor cells.

Impact:

  • Anti-adhesive polypeptides like poly (RGD) offer a promising therapeutic strategy for preventing tumor metastasis.
  • This approach targets a fundamental mechanism of cancer spread, potentially applicable to various cancer types.
  • The lack of cytotoxicity suggests a favorable safety profile for clinical translation.

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