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Related Concept Videos

Healing II: Complications01:24

Healing II: Complications

Complications during healing arise when tissue repair is altered by local or systemic factors. These changes involve abnormal collagen deposition, altered biomechanics, and reduced vascular supply, impairing restoration of normal structure and function.Loss of FunctionScar tissue differs significantly from the original tissue it replaces. In the skin, fibrosis lacks adnexal structures such as hair follicles, sebaceous glands, and sweat glands. Their absence reduces tactile sensitivity, impairs...
Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

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. 
Anchoring junctions mechanically attach a cell to the...
Extracellular Matrix01:26

Extracellular Matrix

Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. This extracellular matrix (ECM) is composed of fibrous proteins like collagen, elastin, and fibronectin in a ground substance consisting of interstitial fluid, cell adhesion proteins, and proteoglycans. The proteoglycans form a gel-like material in the spaces between cells and provide hydration, buffering, binding, and force...
Introduction to Fibroblasts01:09

Introduction to Fibroblasts

Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...

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Related Experiment Video

Updated: May 13, 2026

Fibroblast Derived Human Engineered Connective Tissue for Screening Applications
09:50

Fibroblast Derived Human Engineered Connective Tissue for Screening Applications

Published on: August 20, 2021

Tissue mechanics and fibrosis.

Rebecca G Wells1

  • 1The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA.

Biochimica Et Biophysica Acta
|February 26, 2013
PubMed
Summary

Mechanical forces significantly impact fibrosis development by regulating cell behavior and tissue structure. Understanding these forces is crucial for identifying new therapeutic targets for fibrotic diseases.

Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Pathology

Background:

  • Fibrosis, a pathological process involving excessive extracellular matrix deposition, significantly impacts tissue function and is a hallmark of numerous diseases.
  • While soluble factors have been extensively studied, the role of mechanical forces in fibrosis progression is increasingly recognized as critical.
  • Mechanical forces influence cellular behavior, matrix remodeling, and tissue architecture, suggesting a complex interplay in fibrotic diseases.

Purpose of the Study:

  • To highlight the essential role of mechanical forces in the development and progression of fibrosis.
  • To emphasize the need for a deeper understanding of the types, magnitudes, and characteristics of mechanical forces in biological tissues.
  • To explore the potential of targeting mechanical forces as a therapeutic strategy for fibrotic diseases.

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Micro-Mechanical Characterization of Lung Tissue Using Atomic Force Microscopy

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Last Updated: May 13, 2026

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10:37

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11:10

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Main Methods:

  • Review of existing literature on mechanical forces and fibrosis.
  • Analysis of how mechanical forces regulate cellular phenotypes (e.g., myofibroblasts) and proliferation.
  • Examination of the impact of mechanical forces on growth factor activation and extracellular matrix structure.

Main Results:

  • Mechanical forces are as important as soluble factors in regulating fibrosis.
  • These forces modulate myofibroblast behavior, growth factor activation, and matrix mechanics.
  • Understanding force characteristics in biological tissues is key to comprehending fibrosis.

Conclusions:

  • Mechanical forces are fundamental drivers of fibrosis across multiple tissues.
  • Further research into the biomechanics of fibrosis can reveal novel therapeutic targets.
  • Targeting mechanical forces presents a promising avenue for treating fibrotic diseases.