Advertisement

Cellular and Molecular Life Sciences

, Volume 65, Issue 3, pp 395–413 | Cite as

Hyaluronan synthesis and degradation in cartilage and bone

  • E. R. Bastow
  • S. Byers
  • S. B. Golub
  • C. E. Clarkin
  • A. A. Pitsillides
  • A. J. FosangEmail author
Review

Abstract.

Hyaluronan (HA) is a large but simple glycosaminoglycan composed of repeating D-glucuronic acid, β1–3 linked to N-acetyl-D-glucosamine β1–4, found in body fluids and tissues, in both intra- and extracellular compartments. Despite its structural simplicity, HA has diverse functions in skeletal biology. In development, HA-rich matrices facilitate migration and condensation of mesenchymal cells, and HA participates in joint cavity formation and longitudinal bone growth. In adult cartilage, HA binding to aggrecan immobilises aggrecan, retaining it at the high concentrations required for compressive resilience. HA also appears to regulate bone remodelling by controlling osteoclast, osteoblast and osteocyte behaviour. The functions of HA depend on its intrinsic properties, which in turn rely on the degree of polymerisation by HA synthases, depolymerisation by hyaluronidases, and interactions with HA-binding proteins. HA synthesis and degradation are closely regulated in skeletal tissues and aberrant synthetic or degradative activity causes disease. The role and regulation of HA synthesis and degradation in cartilage, bone and skeletal development is discussed.

Keywords.

Hyaluronan hyaluronan synthase hyaluronidase cartilage bone growth plate skeletal development limb morphogenesis 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Birkhaueser 2007

Authors and Affiliations

  • E. R. Bastow
    • 1
  • S. Byers
    • 2
  • S. B. Golub
    • 1
  • C. E. Clarkin
    • 3
  • A. A. Pitsillides
    • 3
  • A. J. Fosang
    • 1
    Email author
  1. 1.Arthritis Research Group, University of Melbourne Department of Paediatrics and Murdoch Childrens Research InstituteRoyal Children’s HospitalParkvilleAustralia
  2. 2.Matrix Biology Unit, Department of Genetic MedicineChildren, Youth and Women’s Health ServicesNorth AdelaideAustralia
  3. 3.Department of Veterinary Basic SciencesRoyal Veterinary CollegeLondonUK

Personalised recommendations