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Related Concept Videos

The Extracellular Matrix01:42

The Extracellular Matrix

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The Extracellular Matrix01:29

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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...
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Extracellular Matrix01:26

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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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Cell-matrix's Response to Mechanical Forces01:13

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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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Overview of Cell-Matrix Interactions01:24

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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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Electrospray Ionization (ESI) Mass Spectrometry01:12

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Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
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Related Experiment Video

Updated: Feb 3, 2026

Light-Induced Molecular Adsorption of Proteins Using the PRIMO System for Micro-Patterning to Study Cell Responses to Extracellular Matrix Proteins
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Electrosprayed extracellular matrix nanoparticles induce a pro-regenerative cell response.

Patrick A Link1, Alexandria M Ritchie1, Gabrielle M Cotman1

  • 1Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia.

Journal of Tissue Engineering and Regenerative Medicine
|October 28, 2018
PubMed
Summary
This summary is machine-generated.

New decellularized extracellular matrix (ECM) nanoparticles effectively target the distal lung. This formulation retains ECM

Keywords:
electrospray depositionextracellular matrixnanoparticlesrespiratory drug deliverytissue regeneration

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Pulmonary Drug Delivery

Background:

  • Decellularized extracellular matrix (ECM) shows promise as a lung protectant and tissue repair scaffold.
  • Current ECM processing methods yield variable particle sizes, hindering effective delivery to distal lung regions like alveoli.
  • Optimizing ECM formulation is crucial for enhancing lung deposition and therapeutic efficacy.

Purpose of the Study:

  • To develop a decellularized ECM formulation for targeted delivery to the distal lung.
  • To retain the pro-regenerative properties of ECM in nanoparticle form.
  • To assess the biocompatibility and cellular effects of the novel ECM nanoparticles.

Main Methods:

  • Decellularized ECM was digested using acid treatment.
  • The resulting solution was electrosprayed to form nanoparticles with an average size of 225 (±67) nm.
  • Nanoparticle cytotoxicity was evaluated using A549 and BEAS-2B cell lines, and macrophage phenotype was assessed via CD206 expression.

Main Results:

  • Electrosprayed ECM nanoparticles achieved sizes suitable for alveolar deposition.
  • The nanoparticles demonstrated no cytotoxicity in BEAS-2B cells and promoted cellular proliferation in A549 cells at 0.125 mg/ml.
  • Macrophages exposed to ECM nanoparticles exhibited increased expression of CD206, indicating a pro-regenerative phenotype.

Conclusions:

  • Electrosprayed decellularized ECM nanoparticles offer a promising strategy for improved bronchoalveolar deposition.
  • This formulation preserves the inherent pro-regenerative benefits of ECM.
  • The developed nanoparticles represent a potential advancement in lung repair and regenerative therapies.