Mononuclear leukocytes preferentially bind via CD44 to hyaluronan on human intestinal mucosal smooth muscle cells after virus infection or treatment with poly(I·C)

Carol A. De La Motte, Vincent C. Hascall, Anthony Calabro, Belinda Yen-Lieberman, Scott A. Strong*

*Corresponding author for this work

Research output: Contribution to journalArticle

161 Scopus citations

Abstract

Pathological changes in inflammatory bowel disease include an increase in intestinal mucosal mononuclear leukocytes and hyperplasia of the muscularis mucosae smooth muscle cells (M-SMCs). Because virus infections have correlated with disease flare, we tested the response of cultured M-SMCs to respiratory syncytial virus, measles virus, and the viral analogue, poly(I·C). Adhesion of U937 cells and peripheral blood mononuclear cells was used to measure the leukocyte-interactive potential of M-SMCs. Untreated M- SMCs, only minimally adhesive for leukocytes, bound U937 cells after treatment with respiratory syncytial virus or measles virus. Mononuclear leukocytes also bound to poly(I·C)-treated M-SMCs. Although both vascular cell adhesion molecule-1 mRNA and protein increased 3-4-fold in poly(I·C)- treated M-SMC cultures, U937 cell adhesion was not blocked by an anti- vascular cell adhesion molecule-1 monoclonal antibody. However, hyaluronidase digestion of poly(I·C)- or virus-treated M-SMCs dramatically reduced leukocyte adhesion (~75%). Fluorophore-assisted carbohydrate electrophoresis demonstrated a ~3-fold increase in surface-bound hyaluronan on poly(I·C)- treated M-SMCs compared with untreated controls. In addition, pretreatment of mononuclear cells with a blocking anti-CD44 antibody, greatly decreased adhesion to poly(I·C)-treated M-SMCs. Recognition of this virus-induced hyaluronan/CD44 mechanism of mesenchymal cell/leukocyte interaction introduces a new avenue in the research of gut inflammation.

Original languageEnglish (US)
Pages (from-to)30747-30755
Number of pages9
JournalJournal of Biological Chemistry
Volume274
Issue number43
DOIs
StatePublished - Oct 22 1999

ASJC Scopus subject areas

  • Biochemistry

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