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Related Concept Videos

The Extracellular Matrix01:42

The Extracellular Matrix

In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.Composition of the Extracellular MatrixThe extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse molecules.
The Extracellular Matrix01:29

The Extracellular Matrix

Overview
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
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...

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Customizable Hydrogel Coating of ECM-Based Microtissues for Improved Cell Retention and Tissue Integrity.

Shani Elgin1, Eric Silberman1,2,3, Assaf Shapira1,2,3

  • 1The Shmunis School of Biomedicine and Cancer Research, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel.

Gels (Basel, Switzerland)
|August 28, 2024
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Summary

Researchers developed a new hydrogel coating for microtissues to overcome oxygen diffusion limits in tissue engineering. This protective barrier prevents cell leakage and degradation, enhancing regenerative therapy potential.

Keywords:
ECM-based hydrogelhydrogelsmicrofluidicsmicrotissuesnanoparticles

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Oxygen diffusion limits hinder the development of large tissue-engineered constructs.
  • Existing hydrogel microtissues face challenges with in vivo degradation and cell expulsion.

Purpose of the Study:

  • To develop a customizable protocol for creating a protective hydrogel barrier around microtissues.
  • To enhance the stability and cell retention of microtissues for regenerative therapies.

Main Methods:

  • Calcium carbonate nanoparticles were embedded within ECM-based microtissues.
  • Microtissues were exposed to alginate to form a hydrogel coating via diffusion.
  • The thickness of the hydrogel coating was controlled by adjusting various parameters.

Main Results:

  • A biocompatible hydrogel barrier was successfully generated around microtissues.
  • The hydrogel coating prevented cell escape from the microtissues.
  • In vitro and in vivo tests confirmed the protective function against degradation.

Conclusions:

  • This novel technique provides a customizable hydrogel coating for microtissues.
  • The technology addresses key limitations in microtissue stability and cell retention.
  • It offers potential for advanced regenerative therapies using engineered microtissues.