The Tissue Fibrinolytic System Contributes to the Induction of Macrophage Function and CCL3 during Bone Repair in Mice.

ABSTRACT: Macrophages play crucial roles in repair process of various tissues. However, the details in the role of macrophages during bone repair still remains unknown. Herein, we examined the contribution of the tissue fibrinolytic system to the macrophage functions in bone repair after femoral bone defect by using male mice deficient in plasminogen (Plg-/-), urokinase-type plasminogen activator (uPA-/-) or tissue-type plasminogen activator (tPA-/-) genes and their wild-type littermates. Bone repair of the femur was delayed in uPA-/- mice until day 6, compared with wild-type (uPA+/+) mice. Number of Osterix-positive cells and vessel formation were decreased in uPA-/- mice at the bone injury site on day 4, compared with those in uPA+/+ mice. Number of macrophages and their phagocytosis at the bone i

SUBMITTER: Kawao N 

PROVIDER: S-EPMC4404328 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature