Fibronectin associated with infiltrating T lymphocytes. Evidence for in situ localization in biopsies and synthesis in vitro

Eur J Immunol. 1991 Feb;21(2):299-303. doi: 10.1002/eji.1830210209.

Abstract

Dermal and mucosal lymphocyte infiltrates in patients with lichen ruber planus and chronic graft-vs.-host disease exhibited reactivity with anti-fibronectin antibodies. This reactivity was associated with the lymphocytes and localized pericellularly. In contrast, biopsy areas outside lymphocyte accumulations were relatively devoid of reactivity with anti-fibronectin antibodies. Furthermore, the corresponding biopsies from healthy individuals or patients without lymphocyte infiltration showed negligible reactivity with anti-fibronectin antibodies. The fibronectin associated with infiltrating lymphocytes in biopsies may be exogenous of non-lymphoid origin. However, another possibility suggested by in vitro experiments is that this fibronectin is lymphocyte derived. Thus, during cultivation in vitro lymphocytes appear to synthesize a component with fibronectin-like properties. Furthermore, a prerequisite for detection of this synthesis was that the cells were cultured in the presence of serum depleted of fibronectin. These results point to the possibility that fibronectin may play a role for lymphocyte interactions with tissues during infiltrative processes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biopsy
  • Cell Adhesion / immunology
  • Cell Movement / immunology
  • Fibronectins / biosynthesis
  • Fibronectins / physiology*
  • Graft vs Host Disease / immunology*
  • Humans
  • In Vitro Techniques
  • Lichen Planus / immunology*
  • Mouth Mucosa / immunology
  • Skin / immunology
  • T-Lymphocytes / physiology*

Substances

  • Fibronectins