| Literature DB >> 18832590 |
Lixin Kan1, Yijie Liu, Tammy L McGuire, Diana M Palila Berger, Rajeshwar B Awatramani, Susan M Dymecki, John A Kessler.
Abstract
Heterotopic ossification (HO), the abnormal formation of true marrow-containing bone within extraskeletal soft tissues, is a serious bony disorder that may be either acquired or hereditary. We utilized an animal model of the genetic disorder fibrodysplasia ossificans progressiva to examine the cellular mechanisms underlying HO. We found that HO in these animals was triggered by soft tissue injuries and that the effects were mediated by macrophages. Spreading of HO beyond the initial injury site was mediated by an abnormal adaptive immune system. These observations suggest that dysregulation of local stem/progenitor cells could be a common cellular mechanism for typical HO irrespective of the signal initiating the bone formation.Entities:
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Year: 2009 PMID: 18832590 PMCID: PMC2752983 DOI: 10.1634/stemcells.2008-0576
Source DB: PubMed Journal: Stem Cells ISSN: 1066-5099 Impact factor: 6.277