Abstract:
:We have previously reported that lymph node cells generated chemotactic factors for Langerhans cells (LCs) in the induction phase of contact dermatitis. In order to clarify the chemotactic factors involved in migration to the regional lymph nodes, we investigated the migratory activity of murine LCs toward several cytokines and chemokines in vitro. One-day cultured LC-enriched epidermal cells were added to the upper compartment of a modified Boyden chamber and cytokines were added to the lower compartment. We counted dendritic cells migrated to the lower chamber as LCs under phase contrast microscopy. About 99% of migrated dendritic cells were positively reacted with anti-Ia(d) and NLDC145 antibodies and considered to be LCs. We could detect LC migration more accurately by this direct examination than by counting the migrated cells in the filter membrane of a Boyden chamber. In our system, migration of murine epidermal LCs was stimulated by TNF-alpha, RANTES and MCP-1, but not by GM-CSF, IL-1beta, IL-4, and IL-6. TNF-alpha induced LC migration at concentrations from 4 x 10(3) U/ml to 5 x 10(4) U/ml. RANTES at concentrations from 10 to 100 ng/ml and MCP-1 at a concentration of 100 ng/ml induced LC migration in a dose-dependent manner. These data confirmed that TNF-alpha, RANTES, and MCP-1 induced LC migration from epidermis during contact sensitization.
journal_name
Exp Dermatoljournal_title
Experimental dermatologyauthors
Yamazaki S,Yokozeki H,Satoh T,Katayama I,Nishioka Kdoi
10.1111/j.1600-0625.1998.tb00300.xsubject
Has Abstractpub_date
1998-02-01 00:00:00pages
35-41issue
1eissn
0906-6705issn
1600-0625journal_volume
7pub_type
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