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Related Concept Videos

Proteoglycans01:05

Proteoglycans

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,...
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...
Protein Glycosylation01:25

Protein Glycosylation

Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
Glycosylation occurs in...

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Related Experiment Video

Updated: May 24, 2026

Bioinformatics Resources for the Study of Glycan-Mediated Protein Interactions
11:21

Bioinformatics Resources for the Study of Glycan-Mediated Protein Interactions

Published on: January 20, 2022

Proteoglycans in prostate cancer.

Iris J Edwards1

  • 1Department of Pathology, Tumor Biology Section and Comprehensive Cancer Center, Wake Forest School of Medicine, Medical Center Boulevard, Winston Salem, NC 27157, USA. iedwards@wakehealth.edu

Nature Reviews. Urology
|February 22, 2012
PubMed
Summary
This summary is machine-generated.

Proteoglycans regulate cell behavior and are altered in prostate cancer. These changes can promote tumor survival, growth, and spread, highlighting their complex role in cancer progression.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Oncology

Background:

  • Proteoglycans are complex molecules regulating diverse cellular functions through interactions with extracellular matrix components.
  • Progressive alterations in proteoglycans within the tumor microenvironment are observed in prostate cancer, but their origins and impacts remain unclear.
  • Specific proteoglycans like versican, decorin, biglycan, lumican, perlecan, syndecan-1, and betaglycan play varied roles in prostate cancer progression.

Purpose of the Study:

  • To explore the multifaceted roles of proteoglycans in prostate cancer.
  • To understand how alterations in proteoglycan structure and composition influence tumor behavior.
  • To investigate the contribution of proteoglycans to cancer survival, growth, and metastasis.

Main Methods:

  • Literature review of studies on proteoglycans in prostate cancer.
  • Analysis of proteoglycan functions including cell signaling, motility, adhesion, growth, and apoptosis.
  • Examination of proteoglycan expression and enzymatic modifications in the tumor microenvironment.

Main Results:

  • Decorin and lumican show inhibitory effects in prostate cancer.
  • Perlecan may promote tumors via sonic hedgehog signaling.
  • Loss of syndecan-1 and betaglycan in early stages may facilitate progression, while its later expression can be detrimental.

Conclusions:

  • Tumor-associated cellular and enzymatic changes modify proteoglycan function.
  • Cancer cells exploit altered proteoglycans to enhance survival, growth, and metastasis.
  • Proteoglycans represent a dynamic regulatory system in prostate cancer progression.