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IL-4 and TNF-alpha induce changes in integrin expression and adhesive properties and decrease the lung-colonizing

F Herzberg1, M Schöning, M Schirner

  • 1Department of Hematology and Oncology, University Medical Center Benjamin Franklin, Free University of Berlin, Germany. herzberg@fub46.zedat.fu-berlin.de.

Clinical & Experimental Metastasis
|March 1, 1996
PubMed
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Interleukin-4 (IL-4) and tumor necrosis factor alpha (TNF-alpha) alter colon cancer cell adhesion and integrin expression. These cytokines impact tumor cell metastasis, with IL-4 showing a more significant reduction in lung colonization.

Area of Science:

  • Oncology
  • Immunology
  • Cell Biology

Background:

  • Integrins are crucial for tumor cell adhesion and metastasis.
  • Cytokines like IL-4 and TNF-alpha can modulate cellular functions.
  • Understanding cytokine effects on tumor cell integrins is vital for cancer research.

Purpose of the Study:

  • To investigate how IL-4 and TNF-alpha affect integrin expression in HT-29 colon carcinoma cells.
  • To examine the impact of these cytokines on tumor cell adhesion to extracellular matrix proteins.
  • To evaluate the in vivo metastatic potential of cytokine-treated tumor cells.

Main Methods:

  • HT-29 colon carcinoma cells were treated with IL-4 or TNF-alpha.
  • Integrin subunit expression was analyzed using flow cytometry.

Related Experiment Videos

  • Cell adhesion assays were performed using fibronectin and vitronectin.
  • An experimental metastasis model in nude mice was employed to assess lung colonization.

    • Main Results:

    • IL-4 downregulated integrin subunits alpha 2, alpha 3, beta 1, and beta 4, while upregulating alpha 1.
    • TNF-alpha selectively upregulated integrin subunit alpha v.
    • Both cytokines enhanced tumor cell adhesion to fibronectin and vitronectin.
    • IL-4 pre-treatment significantly reduced lung colonization in vivo, while TNF-alpha showed a less pronounced effect.

    Conclusions:

    • IL-4 and TNF-alpha directly regulate tumor cell integrin expression and adhesive properties.
    • These cytokine-induced changes in adhesion influence the metastatic capacity of colon carcinoma cells.
    • Targeting cytokine-integrin interactions may offer therapeutic strategies for reducing cancer metastasis.