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Center for Infectious Diseases and Department of Pathology, State University of New York at Stony Brook
Correspondence: Tracy J. Lisinski, Center for Infectious Diseases/CMM, SUNY at Stony Brook, Stony Brook, NY 11794-5120. E-mail: tlisinsk{at}notes.cc.sunysb.edu
Interleukin (IL)-10 is generally regarded as an anti-inflammatory
cytokine, since it acts on a variety of cell types to suppress
production of proinflammatory mediators. In inflammation, endothelial
cells (EC) play a crucial role in recruiting leukocytes to sites of
injury or infection. In this study, the actions of IL-10 on human
umbilical vein EC were investigated. IL-10 reduced migration of
monocytes and T lymphocytes across endothelium stimulated by
lipopolysaccharide and decreased endothelial production of chemokines
in response to lipopolysaccharide and Borrelia burgdorferi,
the agent of Lyme disease. However, IL-10 did not affect these
responses when EC were activated by the host proinflammatory cytokines
IL-lß or tumor necrosis factor
. Moreover, IL-10 did not prevent
up-regulation of the adhesion molecules E-selectin and intercellular
adhesion molecule-1 by EC exposed to any of these activating agents.
IL-10 therefore inhibits proinflammatory activation of EC in a manner
that is selective with respect to stimulus and effector
response.
Key Words: chemokines leukocytes adhesion molecules
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