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Infection and Immunity, March 2001, p. 1774-1780, Vol. 69, No. 3
Divisions of
Rheumatology/Immunology1 and Pediatric
Rheumatology,2 Tufts University School of
Medicine, New England Medical Center, Boston, Massachusetts, and
the New Haven Orthopedic Group, New Haven,
Connecticut3
Received 28 August 2000/Returned for modification 11 October
2000/Accepted 8 December 2000
The expression of adhesion molecules in synovium in patients with
Lyme arthritis is surely critical in the control of Borrelia burgdorferi infection but may also have pathologic consequences. For example, molecular mimicry between a dominant T-cell epitope of
B. burgdorferi outer surface protein A and an adhesion
molecule, human lymphocyte function-associated antigen 1 (LFA-1), has
been implicated in the pathogenesis of treatment-resistant Lyme
arthritis. Using immunohistochemical methods, we examined synovial
samples for expression of adhesion molecules in 29 patients with
treatment-resistant Lyme arthritis and in 15 patients with rheumatoid
arthritis or chronic inflammatory monoarthritis. In Lyme arthritis
synovia, endothelial cells showed intense expression of P-selectin and vascular adhesion protein-1 (VAP-1). Expression of LFA-1 was also intense on infiltrating cells, particularly in lymphoid aggregates, and
intercellular adhesion molecule-1 (ICAM-1) was markedly expressed on
synovial lining and endothelial and infiltrating cells. Moderate expression of vascular cell adhesion molecule-1 (VCAM-1) was seen on
synovial lining and endothelial cells, and mild expression of its
ligand, very late antigen-4, was apparent in perivascular lymphoid
infiltrates. Except for lesser expression of VCAM-1 in Lyme synovia,
the levels of expression of these adhesion molecules were similar in
the three patient groups. We conclude that certain adhesion molecules,
including ICAM-1 and LFA-1, are expressed intensely in the synovia of
patients with Lyme arthritis. Upregulation of LFA-1 on lymphocytes in
this lesion may be critical in the pathogenesis of treatment-resistant
Lyme arthritis.
0019-9567/01/$04.00+0 DOI: 10.1128/IAI.69.3.1774-1780.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Expression of Adhesion Molecules in Synovia of
Patients with Treatment-Resistant Lyme Arthritis
*
Corresponding author. Mailing address: Division of
Rheumatology/Immunology, New England Medical Center, NEMC no. 406, 750 Washington St., Boston, MA 02111. Phone: (617) 636-5951. Fax: (617)
636-4252. E-mail: uakin{at}lifespan.org.
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