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Related Experiment Videos

Stromal cell involvement in cancer.

Kasper Almholt1, Morten Johnsen

  • 1The Finsen Laboratory, Rigshospitalet, Strandboulevarden 49, 2100 Copenhagen, Denmark.

Recent Results in Cancer Research. Fortschritte Der Krebsforschung. Progres Dans Les Recherches Sur Le Cancer
|June 7, 2003
PubMed
Summary

Solid tumors use the body's proteases for invasion, with stromal cells providing most of these enzymes. Targeting these stromal cells offers a promising therapeutic strategy against cancer metastasis.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Solid tumors utilize endogenous extracellular proteolysis for invasion and metastasis.
  • The plasminogen activation (PA) system and matrix metalloproteinases (MMPs) are key proteolytic systems in cancer.
  • Stromal cells, not cancer cells, predominantly express these proteolytic components in human tumors.

Purpose of the Study:

  • To investigate the cellular origin and contribution of proteolytic systems in tumor invasion and metastasis.
  • To evaluate the suitability of animal models for studying cancer-associated proteolysis.
  • To highlight stromal cells as potential therapeutic targets.

Main Methods:

  • Histochemical and prognostic studies of human cancer patient material.
  • In situ mRNA hybridization and immunohistochemistry for localization of PA and MMP components.
  • Development and utilization of transgenic and transplantable cancer models in mice.

Main Results:

  • Stromal cells (fibroblasts, macrophages, endothelial cells) are the primary source of PA and MMP components in tumors.
  • Transgenic and mouse models confirm the pivotal role of stromal cells in cancer proteolysis.
  • Restoration of wild-type tumor characteristics by transplanting wild-type stromal cells into deficient mice.

Conclusions:

  • Cancer-associated proteolysis is a collaborative process, with stromal cells contributing the majority of necessary proteolytic components.
  • Stromal cells are critical for tumor invasion and represent a promising target for anti-cancer therapies.
  • Further research into targeting tumor-associated fibroblasts, macrophages, and other stromal cells is warranted.

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