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Invadosome is a broad category of cell surface structures with proteolytic activity that  degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However, invadopodia can...
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A Macrophage-Tumor Spheroid Co-Invasion Assay
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Cancer cell: using inflammation to invade the host.

José-Ignacio Arias1, María-Angeles Aller, Jaime Arias

  • 1General Surgery Unit, Monte Naranco Hospital, Oviedo, Asturias, Spain. joseignacio.arias@sespa.princast.es

Molecular Cancer
|April 18, 2007
PubMed
Summary

Inflammation plays a key role in cancer development and metastasis. Targeting the metabolic complexity of tumor cells, specifically inducing oxidative phosphorylation, could be a novel cancer gene therapy approach.

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Area of Science:

  • Oncology
  • Cancer Biology
  • Inflammation Research

Background:

  • Inflammation is a recognized factor in tumorigenesis, but its mechanisms remain unclear.
  • The traditional tumor (T), node (N), and metastasis (M) staging system may also reflect underlying tumoral biology.
  • Understanding the link between inflammation and cancer progression is crucial.

Purpose of the Study:

  • To integrate inflammatory response mechanisms into the current cancer staging system.
  • To explore the shared phenotypes between inflammation and cancer progression.
  • To analyze the metabolic complexity of tumor cells in relation to oxygen utilization.

Main Methods:

  • Examined tumor phenotypes during malignant development, including ischemic, leukocytic, and angiogenic stages.
  • Assessed metabolic shifts, such as anaerobic glycolysis and increased glycolytic enzyme activity.
  • Investigated cellular processes like migration, proliferation, and host cachexia in relation to tumor metabolism.

Main Results:

  • Malignant tumors exhibit phenotypes mirroring inflammatory responses: ischemic, leukocytic (with anaerobic glycolysis and migration), and angiogenic.
  • Increasing metabolic complexity in tumor cells facilitates oxygen release, migration, and proliferation.
  • Tumor growth and metastasis are linked to heightened glycolytic enzyme activity and host cachexia.

Conclusions:

  • Inducing oxidative phosphorylation, the final metabolic step in inflammation, is a potential goal for cancer gene therapy.
  • This approach could lead to tissue differentiation and potentially halt tumor progression.
  • Integrating metabolic and inflammatory pathways offers new therapeutic avenues for cancer.