Perlecan maintains the integrity of cartilage and some basement membranes

Research output: Contribution to journalArticle

Abstract

Perlecan is a heparan sulfate proteoglycan that is expressed in all basement membranes (BMs), in cartilage, and several other mesenchymal tissues during development. Perlecan binds growth factors and interacts with various extracellular matrix proteins and cell adhesion molecules. Homozygous mice with a null mutation in the perlecan gene exhibit normal formation of BMs. However, BMs deteriorate in regions with increased mechanical stress such as the contracting myocardium and the expanding brain vesicles showing that perlecan is crucial for maintaining BM integrity. As a consequence, small clefts are formed in the cardiac muscle leading to blood leakage into the pericardial cavity and an arrest of heart function. The defects in the BM separating the brain from the adjacent mesenchyme caused invasion of brain tissue into the overlaying ectoderm leading to abnormal expansion of neuroepithelium, neuronal ectopias, and exencephaly. Finally, homozygotes developed a severe defect in cartilage, a tissue that lacks BMs. The chondrodysplasia is characterized by a reduction of the fibrillar collagen network, shortened collagen fibers, and elevated expression of cartilage extracellular matrix genes, suggesting that perlecan protects cartilage extracellular matrix from degradation.

Details

Authors
  • Mercedes Costell
  • Erika Gustafsson
  • Attila Aszodi
  • Matthias Mörgelin
  • W Bloch
  • E Hunziker
  • K Addicks
  • R Timpl
  • Reinhard Fässler
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Infectious Medicine
  • Cancer and Oncology

Keywords

  • chondrodysplasia, exencephaly, cardiac muscle, perlecan, basement membrane
Original languageEnglish
Pages (from-to)1109-1122
JournalJournal of Cell Biology
Volume147
Issue number5
Publication statusPublished - 1999
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Pathology, (Lund) (013030000), Division of Infection Medicine (BMC) (013024020)