T lymphocyte migration to arthritic joints and dermal inflammation in the rat: differing migration patterns and the involvement of VLA-4
- PMID: 1934631
- DOI: 10.1016/s0090-1229(05)80014-5
T lymphocyte migration to arthritic joints and dermal inflammation in the rat: differing migration patterns and the involvement of VLA-4
Abstract
The migration of T lymphocytes into arthritic joints of rats with adjuvant arthritis was examined and compared to the accumulation of the same cells in cutaneous inflammation, since previous studies had shown that only a subpopulation of T lymphocytes, found enriched in peritoneal exudates (sPEL), migrated efficiently to cutaneous inflammatory sites. Surprisingly, lymphocyte migration to the inflamed joint included T cells from most of the recirculating lymphocyte pool, including sPEL, spleen, peripheral lymph node (PLN), and Peyer's patches, and was much more rapid than migration through either cutaneous sites or PLNs. Treatment of sPEL with antibody to VLA-4 inhibited sPEL accumulation in the joints, while anti-VLA-4 treatment did not affect the accumulation of PLN T cells. It is concluded that the arthritic joint not only attracts inflammation-seeking lymphocytes (sPEL), through at least a partially VLA-4 dependent interaction, but also large numbers of lymphocytes which normally migrate to PLNs through a VLA-4-independent mechanism.
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