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Related Concept Videos

Growth of Cartilage and Bone Tissue01:27

Growth of Cartilage and Bone Tissue

Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
Bone Formation by Endochondral Ossification01:24

Bone Formation by Endochondral Ossification

Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...

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Related Experiment Video

Updated: May 16, 2026

Mechanical Stimulation of Chondrocyte-agarose Hydrogels
12:45

Mechanical Stimulation of Chondrocyte-agarose Hydrogels

Published on: October 27, 2012

Scaffold architecture determines chondrocyte response to externally applied dynamic compression.

Tariq Mesallati1, Conor T Buckley, Thomas Nagel

  • 1Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland.

Biomechanics and Modeling in Mechanobiology
|November 20, 2012
PubMed
Summary

Dynamic compression (DC) of engineered cartilage influences chondrocyte activity. Modifying scaffold architecture alters fluid flow, enhancing collagen production and improving engineered tissue development.

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A Microfluidic Platform for Stimulating Chondrocytes with Dynamic Compression
07:23

A Microfluidic Platform for Stimulating Chondrocytes with Dynamic Compression

Published on: September 13, 2019

Related Experiment Videos

Last Updated: May 16, 2026

Mechanical Stimulation of Chondrocyte-agarose Hydrogels
12:45

Mechanical Stimulation of Chondrocyte-agarose Hydrogels

Published on: October 27, 2012

A Microfluidic Platform for Stimulating Chondrocytes with Dynamic Compression
07:23

A Microfluidic Platform for Stimulating Chondrocytes with Dynamic Compression

Published on: September 13, 2019

Area of Science:

  • Biomedical Engineering
  • Tissue Engineering
  • Mechanobiology

Background:

  • Chondrocyte biosynthetic activity is regulated by mechanical signals, particularly dynamic compression (DC).
  • Interstitial fluid flow, induced by DC, is thought to enhance cartilage-specific matrix production.
  • Controlling chondrocyte behavior via fluid flow modification in dynamically compressed hydrogels is a promising approach.

Purpose of the Study:

  • To determine how construct architecture influences the mechanical environment in dynamically compressed agarose hydrogels using finite element (FE) modeling.
  • To investigate chondrocyte responses to altered mechanical environments within these hydrogels.
  • To explore methods for controlling spatial levels of biophysical cues in engineered tissues.

Main Methods:

  • Finite element (FE) modeling was used to predict fluid flow in solid and channeled agarose hydrogels under dynamic compression.
  • Agarose hydrogels with an array of channels were fabricated to modify construct architecture.
  • Chondrocyte responses, including sGAG and collagen synthesis, were measured in response to altered fluid flow environments.

Main Results:

  • FE modeling predicted increased fluid flow in the periphery of solid constructs and around channels in channeled constructs.
  • Dynamic compression significantly increased sulfated glycosaminoglycan (sGAG) synthesis in solid constructs.
  • Collagen accumulation was preferentially increased in regions with higher predicted fluid flow, indicating fluid flow's importance for collagen production.

Conclusions:

  • Modifying hydrogel architecture alters spatial levels of biophysical cues, leading to more uniform collagen accumulation in engineered tissues.
  • This study demonstrates a method to enhance collagen production throughout engineered cartilage, not just in the periphery.
  • The developed system offers a novel approach to study chondrocyte responses to varying biophysical stimulation levels.