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Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
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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,...
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Area of Science:

  • Oncology
  • Biophysics
  • Cancer Biology

Background:

  • Metastasis is the primary cause of cancer mortality.
  • Current anti-metastatic therapies are limited by an incomplete understanding of metastasis mechanisms.
  • The role of mechanical forces in the tumor microenvironment is increasingly recognized.

Purpose of the Study:

  • To propose that mechanical stresses in the primary tumor microenvironment select for and enhance the survival of metastatic tumor cells.
  • To introduce the concept of "mechanical memory" as a mechanism for retaining these adaptations.
  • To explore how matrix stiffness influences tumor cell behavior and promotes metastasis.

Main Methods:

  • This perspective synthesizes existing research on mechanobiology and cancer metastasis.
  • It focuses on the biophysical adaptations of tumor cells under mechanical stress.
  • Potential mechanisms of mechanical memory formation, including mechanotransduction and epigenetic changes, are discussed.

Main Results:

  • Mechanical stresses in the primary tumor microenvironment can select for tumor cells with enhanced metastatic potential.
  • These biophysical adaptations are proposed to be retained via a "mechanical memory."
  • High matrix stiffness, a common mechanical cue, alters tumor cell proliferation, survival, secretion, force generation, deformability, migration, and invasion.

Conclusions:

  • Mechanical memory, influenced by stress magnitude and duration, plays a crucial role in metastasis.
  • Retained biophysical adaptations improve tumor cell survival and colonization in distant organs.
  • Deciphering these mechanical memory mechanisms is essential for developing novel anti-metastatic drugs.