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Related Concept Videos

Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
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Cadherins in Tissue Organization01:19

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The cadherins are a superfamily of cell adhesion molecules comprising over 180 variants, with specific tissues expressing a particular combination of cadherin types. Cadherins generally exhibit homophilic binding; i.e., cadherins on one cell bind to cadherins of the same or closely related type on another cell. Thus, cells of the same type have a specific affinity to bind to each other and sort themselves into clusters to form tissues.
Cell Sorting During Development
Cell sorting plays an...
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Adherens Junctions01:24

Adherens Junctions

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Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
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Cancer Cell Migration through Invadopodia01:35

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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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Cell Adhesion Molecules - Types and Functions

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Cell adhesion molecules (CAMs) are pivotal to multicellularity and the coordinated functioning of tissues and organ systems. They enable physical interactions between cells and provide mechanical strength to tissues. They also function as receptors for signal transmission across the plasma membrane. The CAMs are broadly classified into four families - integrins, cadherins, selectins, and immunoglobulin-like CAMs (IgCAMs).
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The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
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Related Experiment Video

Updated: Jul 8, 2025

Analyzing the Communication Between Monocytes and Primary Breast Cancer Cells in an Extracellular Matrix Extract ECME-based Three-dimensional System
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Interfacial Organization and Forces Arising from Epithelial-Cancerous Monolayer Interactions.

Liu-Yuan Guan1, Shao-Zhen Lin1, Peng-Cheng Chen1

  • 1Institute of Biomechanics and Medical Engineering, Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China.

ACS Nano
|December 13, 2023
PubMed
Summary

Epithelial cells form complex structures that physically push back against cancer cells, preventing tumor invasion. This involves mechanical forces and specific cell adhesion molecules, highlighting their role in tissue integrity.

Keywords:
epithelium−cancer interactionforce transmissionintercellular cadherinsinterfacial morphodynamicssubcellular organizations

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Area of Science:

  • Cell Biology
  • Biophysics
  • Cancer Research

Background:

  • Interfacial interactions between epithelial and cancer cells are critical for tumor development and metastasis.
  • Understanding these interactions at the tissue level is essential for developing effective cancer therapies.

Purpose of the Study:

  • To investigate the tissue-level interfacial interactions between nontumorigenic epithelial cells (MCF10A) and breast cancer cells (MDA-MB-231).
  • To elucidate the roles of mechanical forces and cell adhesion molecules in regulating these interactions and preventing cancer cell invasion.

Main Methods:

  • Monolayer confrontation assay of MCF10A and MDA-MB-231 cells.
  • Nanomechanical modeling combining atomic force microscopy and finite element simulations.
  • Tracking substrate displacements using fluorescent nanobeads.
  • Investigating the roles of E-cadherin and P-cadherin in epithelial cell organization.

Main Results:

  • Epithelial cells form hierarchical finger-like structures that penetrate the cancer cell monolayer.
  • Mechanical forces generated by epithelial cells lead to cancer cell squeezing, extrusion, and p53 apoptosis signaling.
  • E-cadherin influences interfacial geometry and force localization, while P-cadherin maintains long-range force transmission.

Conclusions:

  • Collaborative molecular and mechanical behaviors of epithelial cells are crucial for preventing tumor invasion.
  • Epithelial cell structures and forces act as a physical barrier against cancer progression.
  • Differential roles of E-cadherin and P-cadherin in regulating epithelial-cancerous interfaces offer therapeutic targets.