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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...
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...
Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

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...
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...

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Updated: Jun 8, 2026

Design and Construction of Artificial Extracellular Matrix (aECM) Proteins from Escherichia coli for Skin Tissue Engineering
10:30

Design and Construction of Artificial Extracellular Matrix (aECM) Proteins from Escherichia coli for Skin Tissue Engineering

Published on: June 11, 2015

A structurally tunable DNA-based extracellular matrix.

Faisal A Aldaye1, William T Senapedis, Pamela A Silver

  • 1Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, Massachusetts 02115, United States. faisal_aldaye@hms.harvard.edu

Journal of the American Chemical Society
|October 8, 2010
PubMed
Summary
This summary is machine-generated.

Researchers created novel DNA/protein matrices for cell scaffolding. These programmable biomaterials precisely control cell behavior and structure, mimicking natural extracellular environments for research applications.

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Area of Science:

  • Biomaterials Science
  • Molecular Engineering
  • Cell Biology

Background:

  • Extracellular matrices (ECM) are crucial for cell behavior and tissue structure.
  • Current ECM models often lack precise structural control and programmability.
  • Integrating DNA nanotechnology with protein engineering offers new possibilities for synthetic ECM.

Purpose of the Study:

  • To develop a new class of artificial extracellular matrices by combining DNA nanotechnology and protein engineering.
  • To demonstrate the utility of these DNA/protein matrices for ex vivo cellular scaffolding.
  • To establish a modular platform for creating programmable ECMs that mimic natural cellular niches.

Main Methods:

  • Combined DNA nanotechnology principles with protein engineering techniques.
  • Fabricated DNA/protein-based matrices for cellular scaffolding.
  • Engineered single-stranded DNA domains to tune matrix persistence length and stiffness.
  • Cultured human cervical cancer cells on the engineered matrices.
  • Analyzed cell adhesion, viability, migration, cytoskeletal arrangement, p-FAK signaling, and FOXO1a transcription factor localization.

Main Results:

  • Human cervical cancer cells exhibited strong adhesion, high viability, and rapid migration on the DNA/protein matrices.
  • Structural tunability of the DNA/protein matrices was achieved by engineering DNA domains.
  • Matrix stiffness and persistence length influenced cell cytoskeletal organization and shape.
  • Cellular signaling (p-FAK) and transcription factor localization (FOXO1a) were modulated by the engineered matrix properties.

Conclusions:

  • A novel class of programmable, DNA/protein-based artificial extracellular matrices has been successfully developed.
  • These matrices provide a versatile platform for ex vivo cellular scaffolding and the study of cell-matrix interactions.
  • The facile and modular construction allows for systematic replication and investigation of natural extracellular niches.