Journal
BLOOD
Volume 106, Issue 1, Pages 207-215Publisher
AMER SOC HEMATOLOGY
DOI: 10.1182/blood-2004-12-4943
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Macrophage galactose-type C-type lectins (MGLs), which were recently named CD301, have 2 homologues in mice: MGL1 and MGL2. MGLs are expressed on macrophages and immature dendritic cells. The persistent presence of granulation tissue induced by a protein antigen was observed in wild-type mice but not in mice lacking an endogenous, macrophage-specific, galactose-type calcium-type lectin 1 (MGL1) in an air pouch model. The anti-MGL1 antibody suppressed the granulation tissue formation in wild-type mice. A large number of cells, present only in the pouch of MGL1-deficient mice, were not myeloid or lymphoid lineage cells and the number significantly declined after administration of interleukin 1 alpha. (IL-1 alpha) into the pouch of MGL1-deficient mice. Furthermore, granulation tissue was restored by this treatment and the cells obtained from the pouch of MGL1-deficient mice were incorporated into the granulation tissue when injected with Taken together, MGL1 expressed on a specific subpopulation of macrophages that secrete IL-1 alpha was proposed to regulate specific cellular interactions crucial to granulation tissue formation.
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