Plasminogen is a critical regulator of cutaneous wound healing

Thrombosis and Haemostasis
Rima SulniuteTor Ny

Abstract

Wound healing is a complicated biological process that consist of partially overlapping inflammatory, proliferation and tissue remodelling phases. A successful wound healing depends on a proper activation and subsequent termination of the inflammatory phase. The failure to terminate the inflammation halts the completion of wound healing and is a known reason for formation of chronic wounds. Previous studies have shown that wound closure is delayed in plasminogen-deficient mice, and a role for plasminogen in dissection of extracellular matrix was suggested. However, our finding that plasminogen is transported to the wound by inflammatory cells early during the healing process, where it potentiates inflammation, indicates that plasminogen may also have other roles in the wound healing process. Here we report that plasminogen-deficient mice have extensive fibrin and neutrophil depositions in the wounded area long after re-epithelialisation, indicating inefficient debridement and chronic inflammation. Delayed formation of granulation tissue suggests that fibroblast function is impaired in the absence of plasminogen. Therefore, in addition to its role in the activation of inflammation, plasminogen is also crucial for subsequent step...Continue Reading

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