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Macrophages interact with enriched populations of distinct T lymphocyte subsets for the induction of severe destructive Lyme arthritis.

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Abstract

Severe destructive
Lyme arthritis was detected in the hind paws of hamsters infused with enriched populations of either CD4+ or CD4- T lymphocytes along with macrophages exposed in vitro to formalin-inactivated Borrelia burgdorferi and then infected with the
Lyme spirochete. Swelling was detected 4 days after infection, increased rapidly, peaked on day 8 of infection, and gradually decreased. Similarly, severe destructive arthritis was induced in hamsters infused with enriched populations of unfractionated T lymphocytes and macrophages exposed to spirochetes after infection with B. burgdorferi. Histopathological examination affirmed that hamsters infused with CD4+, CD4-, or unfractionated T lymphocytes and macrophages exposed to B. burgdorferi-induced arthritis. In addition, macrophages exposed in vitro to B. burgdorferi demonstrated both conventional and coiling phagocytosis, suggesting a mechanism by which CD4+ and CD4- T lymphocytes induce arthritis, respectively. These findings demonstrate that both CD4+ and CD4- subpopulations of T lymphocytes are capable of interacting with macrophages for the induction of severe destructive
Lyme arthritis.

J Leukoc Biol. 1999 Feb;65(2):162-70. Research Support, U.S. Gov’t, P.H.S.

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