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Presence of anti-cystatin C-positive dendritic cells or macrophages and localization of cysteine proteases in the apical bud of the enamel organ in the rat incisor.

Authors: Nishikawa, S 
Citation: Nishikawa S J Histochem Cytochem. 2005 May;53(5):643-51.
Pubmed: (View Article at PubMed) PMID:15872057
DOI: Full-text: DOI:10.1369/jhc.4A6533.2005

Cystatin C, a cysteine protease inhibitor, was examined in the apical buds of rat incisors by immunohistochemistry, because in transition and maturation zones most of the dendritic cells in the papillary layer are anti-cystatin C-positive. Anti-cystatin C-labeled cells were sparse and localized to the proliferation and differentiation zones, constituting the apical bud of 5-week-old rat incisors. These cells were considered macrophages or dendritic cells, based on their reactivity with OX6 and ED1, as well as their ultrastructure. Basement membrane at the periphery of apical bud was also labeled by anti-cystatin C antibody. The apical buds included a few apoptotic fragments and weak reactivity with antibody to cathepsin L, a cysteine protease. Reactivity to anti-cystatin C and anti-cathepsin L antibodies was also detected in the apical bud of newborn rat incisors. These results suggest that the cystatin C-positive macrophages or dendritic cells are involved in normal incisor formation. They may be related to the clearance of apoptotic cells or protection from putative cysteine protease activity.

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CRRD Object Information
CRRD ID: 2306505
Created: 2009-04-20
Species: All species
Last Modified: 2009-04-20
Status: ACTIVE



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