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Related Concept Videos

Extracellular Matrix01:26

Extracellular Matrix

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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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The Extracellular Matrix01:42

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Overview
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Collagens are the Major Structural Proteins of ECM01:13

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Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Collagen fiber is made from fibrous protein subunits linked together to form a long, straight fiber. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. These fibers hold connective tissues together, even during the body's movement.
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Matrix Proteoglycans and Glycoproteins01:21

Matrix Proteoglycans and Glycoproteins

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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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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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Connective Tissue Fibers and Ground Substance01:17

Connective Tissue Fibers and Ground Substance

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One of the significant functions of connective tissue is connecting tissues and organs. Unlike epithelial tissue that is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that are embedded within it. It plays a significant role in the functioning of this tissue. The major component of the matrix is a...
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A Rapid, Scalable Method for the Isolation, Functional Study, and Analysis of Cell-derived Extracellular Matrix
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Human extracellular matrix (ECM)-like collagen and its bioactivity.

Hui Zhou1, Wenwei Li2, Lixin Pan2

  • 1State Key Laboratory of Polymer Materials and Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China.

Regenerative Biomaterials
|March 28, 2024
PubMed
Summary

Human ECM-like collagen (hCol) derived from stem cells offers a promising alternative for tissue engineering. This novel collagen source supports cell behaviors and promotes wound healing, showing potential for in vitro and in vivo applications.

Keywords:
cell-derived matrixextracellular matrixhierarchical structurenative-like collagen

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Extracellular Matrix Biology

Background:

  • Collagen is crucial for tissue support and development but sourcing challenges exist.
  • Animal-derived collagen presents immunogenicity risks.
  • Recombinant collagen often exhibits reduced bioactivity.

Purpose of the Study:

  • To develop and evaluate human ECM-like collagen (hCol) as a viable alternative for tissue engineering.
  • To assess the bioactivity and structural resemblance of hCol to native collagen.
  • To investigate hCol's efficacy in promoting stem cell functions and wound healing.

Main Methods:

  • Generated hCol from mesenchymal stem cells using a facile platform.
  • Characterized hCol's hierarchical structure and biochemical properties.
  • Assessed hCol's impact on human adipose-derived stem cell viability, proliferation, migration, and differentiation.
  • Evaluated hCol's efficacy in promoting cutaneous wound closure in vivo.

Main Results:

  • hCol was successfully generated with structural and biochemical properties similar to native collagen.
  • hCol supported essential biological behaviors of human adipose-derived stem cells.
  • hCol demonstrated promotion of cutaneous wound closure.
  • The generated hCol exhibited good bioactivity.

Conclusions:

  • Human ECM-like collagen (hCol) is a promising biomaterial for tissue engineering.
  • hCol offers an alternative to animal-derived and recombinant collagen sources.
  • hCol shows potential for both in vitro and in vivo applications due to its bioactivity and similarity to native collagen.