Immunohistochemical demonstration of fibronectin in the most superficial layer of normal rabbit articular cartilage

Keiichiro Nishida, H. Inoue, T. Murakami

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Objective-To locate fibronectin ultrastructurally in the most superficial layer of normal articular cartilage of rabbits, in order to clarify its role in joint physiology. Methods-Articular cartilage was obtained from the femoral condyle of seven normal adult rabbits and prepared by a method that included tannic acid fixation. Polyclonal antibodies against rabbit fibronectin were used in an immunohistochemical electron microscopic study, without any enzymic digestion but with a pre-embedding method for the transmission electron microscopy. Results-The cardlage surface was successfully preserved by tannic acid fixation. The most superficial layer in electron photomicrographs was approximately 200-300 nm thick, cell free, and appeared to have two parallel components: the more superficial lamina and the deeper lamina. Gold labelled fibronectin lined this layer in immunohistochemical electron photomicrographs. Conclusions-Fibronectin covering the surface ofthe articular cartilage may have a role in joint lubrication and protection of the cardlage by binding with the collagenous matrix and hyaluronic acid in synovial fluid. Chondroitin sulphates may act as a charge barrier in close relationship with the collagen fibrils in the deeper lamina. Significant alteration in these functions may be one of the first causal steps leading to destruction of the articular cardlage.

Original languageEnglish
Pages (from-to)995-998
Number of pages4
JournalAnnals of the Rheumatic Diseases
Volume54
Issue number12
DOIs
Publication statusPublished - 1995

Fingerprint

Cartilage
Articular Cartilage
Fibronectins
Demonstrations
Rabbits
Joints
Tannins
Electrons
Lubrication
Chondroitin Sulfates
Synovial Fluid
Physiology
Hyaluronic Acid
Thigh
Transmission Electron Microscopy
Gold
Digestion
Collagen
Transmission electron microscopy
Bone and Bones

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience
  • Immunology
  • Rheumatology

Cite this

Immunohistochemical demonstration of fibronectin in the most superficial layer of normal rabbit articular cartilage. / Nishida, Keiichiro; Inoue, H.; Murakami, T.

In: Annals of the Rheumatic Diseases, Vol. 54, No. 12, 1995, p. 995-998.

Research output: Contribution to journalArticle

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