Abstract:
:DEL-1 (developmental endothelial locus-1) is an endothelial cell-secreted protein that regulates LFA-1 (lymphocyte function-associated antigen-1) integrin-dependent leukocyte recruitment and inflammation in various tissues. We identified a novel regulatory mechanism of DEL-1 in osteoclast biology. Specifically, we showed that DEL-1 is expressed by human and mouse osteoclasts and regulates their differentiation and resorptive function. Mechanistically, DEL-1 inhibited the expression of NFATc1, a master regulator of osteoclastogenesis, in a Mac-1 integrin-dependent manner. In vivo mechanistic analysis has dissociated the anti-inflammatory from the anti-bone-resorptive action of DEL-1 and identified structural components thereof mediating these distinct functions. Locally administered human DEL-1 blocked inflammatory periodontal bone loss in nonhuman primates-a relevant model of human periodontitis. The ability of DEL-1 to regulate both upstream (inflammatory cell recruitment) and downstream (osteoclastogenesis) events that lead to inflammatory bone loss paves the way to a new class of endogenous therapeutics for treating periodontitis and perhaps other inflammatory disorders.
journal_name
Sci Transl Medjournal_title
Science translational medicineauthors
Shin J,Maekawa T,Abe T,Hajishengallis E,Hosur K,Pyaram K,Mitroulis I,Chavakis T,Hajishengallis Gdoi
10.1126/scitranslmed.aac5380subject
Has Abstractpub_date
2015-09-30 00:00:00pages
307ra155issue
307eissn
1946-6234issn
1946-6242pii
7/307/307ra155journal_volume
7pub_type
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