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Related Concept Videos

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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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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Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult...
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Proteoglycans01:05

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Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
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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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Related Experiment Video

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Perlecan, A Multi-Functional, Cell-Instructive, Matrix-Stabilizing Proteoglycan With Roles in Tissue Development Has

Anthony J Hayes1, Brooke L Farrugia2, Ifechukwude J Biose3

  • 1Bioimaging Research Hub, Cardiff School of Biosciences, Cardiff University, Wales, United Kingdom.

Frontiers in Cell and Developmental Biology
|April 18, 2022
PubMed
Summary

Perlecan (HSPG2) is a multifunctional proteoglycan vital for tissue repair, development, and stabilization. Understanding its diverse roles offers potential for novel therapeutic strategies in regenerative medicine.

Keywords:
cartilage repairgrowth factor deliveryperlecanperlecan domain-Iperlecan domain-Vrepair biologyrepair of blood brain barriervascular repair

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Area of Science:

  • Extracellular Matrix Biology
  • Regenerative Medicine
  • Proteoglycan Function

Background:

  • Perlecan (HSPG2) is a ubiquitous proteoglycan with critical roles in development and tissue homeostasis.
  • Its multifunctional nature spans angiogenesis, mechanosensation, and extracellular matrix stabilization.
  • Dysfunctional perlecan is implicated in genetic disorders like Schwartz-Jampel Syndrome.

Purpose of the Study:

  • To review the multifaceted properties of perlecan (HSPG2) and its therapeutic potential in repair biology.
  • To elucidate perlecan's specific domain functions in tissue development, repair, and disease.
  • To highlight emerging applications of perlecan in tissue engineering and regenerative medicine.

Main Methods:

  • Comprehensive literature review of studies on perlecan's structure, function, and interactions.
  • Analysis of perlecan's role in various biological processes, including angiogenesis, mechanotransduction, and neuroprotection.
  • Examination of perlecan's involvement in tissue development, repair mechanisms, and disease pathology.

Main Results:

  • Perlecan domains exhibit distinct functions: Domain I (growth factor binding), Domain II (lipid/morphogen interaction), Domain III (FGF binding/secretion), Domain IV (cell attachment/matrix stabilization), and Domain V (tissue repair, BBB reconstitution, neuroprotection).
  • Perlecan actively participates in angiogenesis, wound healing, vascular repair, and neuromuscular junction function.
  • Perlecan-derived peptides show promise in tissue engineering for salivary gland and cartilage regeneration.

Conclusions:

  • Perlecan is a pleomorphic molecule with significant biological importance, crucial for tissue development, growth, and repair.
  • Understanding its diverse functions provides valuable insights for developing novel therapeutic strategies in regenerative medicine.
  • Recombinant perlecan domains offer promising avenues for future tissue repair and engineering applications.