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Related Concept Videos

The Extracellular Matrix01:42

The Extracellular Matrix

Overview
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...
Matrix Proteoglycans and Glycoproteins01:21

Matrix Proteoglycans and Glycoproteins

Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
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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Updated: May 26, 2026

Tunable Hydrogels from Pulmonary Extracellular Matrix for 3D Cell Culture
10:54

Tunable Hydrogels from Pulmonary Extracellular Matrix for 3D Cell Culture

Published on: January 17, 2017

Granular Extracellular Matrix (gECM) Hydrogels Enable Distinct Composition and Mechanics Across Tissue Types for

Juliet O Heye, Shannon A Blanco, Stephanie E Schneider

    Biorxiv : the Preprint Server for Biology
    |May 25, 2026
    PubMed
    Summary

    Researchers developed granular extracellular matrix (gECM) hydrogels for tissue engineering. These biomaterials are printable, stable, and support cell growth, offering a promising platform for tissue repair and in vitro models.

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    Area of Science:

    • Biomaterials Science
    • Tissue Engineering
    • Regenerative Medicine

    Background:

    • Current biomaterials for tissue engineering often lack intentional design for translation, including regulatory compliance, practical delivery, and biomimetic properties.
    • Existing granular hydrogels and ECM-derived scaffolds show promise but require further optimization for clinical applications.

    Purpose of the Study:

    • To develop and characterize a library of granular extracellular matrix (gECM) biomaterials for five key tissues: cartilage, bone, skin, liver, and kidney.
    • To optimize processing methods for gECM hydrogels that preserve native tissue characteristics and align with manufacturing and regulatory standards.
    • To evaluate the printability, stability, mechanical properties, and cellular compatibility of gECM hydrogels.

    Main Methods:

    • Development of gECM hydrogels by densely packing ECM particles within a hyaluronic acid hydrogel.
    • Optimization of tissue processing to preserve proteomic content and structure, considering scale-up and regulatory guidelines.
    • Characterization of gECM hydrogel properties including moldability, extrudability, 3D printability, shape retention, stability at physiological conditions, and bulk mechanics.

    Main Results:

    • gECM hydrogels were successfully developed and characterized for five distinct tissue types.
    • Processing methods were optimized to maintain ECM integrity and meet manufacturing/regulatory considerations.
    • gECM hydrogels demonstrated excellent printability, shape stability, and stabilization at physiological temperature and pH.
    • Bulk mechanics of gECM hydrogels were found to be tissue-specific.
    • gECM hydrogels supported cellular viability, proliferation, and tissue-specific functions.

    Conclusions:

    • gECM hydrogels represent a novel, translational, and biomimetic platform for tissue engineering.
    • These hydrogels are suitable for both advanced in vitro models and clinical tissue repair applications.
    • The developed gECM platform addresses key limitations of current biomaterials, paving the way for improved regenerative strategies.