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Original Article |
Correspondence to: Kouji Matsushima, Department of Molecular Preventive Medicine, School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyoku, Tokyo 113-0033, Japan. Tel:81-3-5841-3431 Fax:81-3-5684-2297 E-mail:koujim{at}m.u-tokyo.ac.jp.
We have studied the recruitment and roles of distinct dendritic cell (DC) precursors from the circulation into Propionibacterium acnesinduced granulomas in mouse liver. During infection, F4/80-B220-CD11c+ DC precursors appeared in the circulation, migrated into the perisinusoidal space, and matured within newly formed granulomas. Recruited DCs later migrated to the portal area to interact with T cells in what we term "portal tractassociated lymphoid tissue" (PALT). Macrophage inflammatory protein 1
attracted blood DC precursors to the sinusoidal granuloma, whereas secondary lymphoid organ chemokine (SLC) attracted mature DCs to the newly identified PALT. Anti-SLC antibody diminished PALT expansion while exacerbating granuloma formation. Therefore, circulating DC precursors can migrate into a solid organ like liver, and participate in the granulomatous reaction in response to specific chemokines.
Key Words: dendritic cells, CC chemokine, migration, portal system, inflammation
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