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Infection and Immunity, April 2001, p. 2190-2197, Vol. 69, No. 4
Center for Infectious Diseases and Department
of Pathology, State University of New York at Stony Brook, Stony
Brook, New York 11794-5120
Received 15 August 2000/Returned for modification 16 October
2000/Accepted 19 December 2000
Lyme disease, caused by Borrelia burgdorferi, is
characterized by the accumulation of lymphocytes and monocytes in the
affected tissue. Endothelial cells line the blood vessel walls and
control the trafficking of inflammatory leukocytes from the blood into the surrounding tissues. A model of the blood vessel wall, consisting of human umbilical vein endothelial cells (HUVEC) grown on amniotic connective tissue, was utilized to examine the effects of B. burgdorferi on the transendothelial migration of T lymphocytes.
Maximal migration occurred when the HUVEC-amnion cultures were
preincubated with B. burgdorferi for 24 h and T
lymphocytes were added for an additional 4 h, yielding a two- to
fourfold increase compared to migration across unstimulated cultures.
The number of T lymphocytes that migrated was proportional to the
number added. The anti-inflammatory cytokine interleukin 10 (IL-10),
added during activation of the HUVEC, significantly diminished (by an
average of 70% ± 21%) the migration of T lymphocytes across
endothelium stimulated for 8 or 24 h with B. burgdorferi, but not IL-1. Compared to the initially added
population of T lymphocytes, the population that migrated across
untreated endothelium or HUVEC activated with B. burgdorferi or IL-1 contained a significantly smaller percentage
of CD45RA+RO
0019-9567/01/$04.00+0 DOI: 10.1128/IAI.69.4.2190-2197.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Activation of Endothelium by Borrelia
burgdorferi In Vitro Enhances Transmigration of Specific Subsets
of T Lymphocytes
(naïve) cells and a
greater proportion of CD45RA+RO+ cells. The
migratory population was also enriched for CD8+ T
lymphocytes when the endothelium was incubated with either control
medium or B. burgdorferi, but not IL-1. B. burgdorferi thus activates endothelium in a manner that promotes
the transmigration of T lymphocytes, and IL-10 inhibits this
activation. These data further suggest that endothelium plays an active
role in promoting the recruitment of specific subpopulations of T lymphocytes.
*
Corresponding author. Mailing address: Center for
Infectious Diseases/CMM, SUNY at Stony Brook, Stony Brook, NY
11794-5120. Phone: (631) 632-4226. Fax: (631) 632-4294. E-mail:
egergel{at}notes.cc.sunysb.edu.
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