Abstract:
Activated protein C (APC) is a serine protease that plays a central role in physiological anticoagulation, and
has more recently been shown to be a potent anti-inflammatory mediator, Using cultured human cells, we
show here that APC up-regulates the angiogenic promoters matrix metalloproteinase-2 in skin fibroblasts and
umbilical vein endothelial cells, vascular endothelial growth factor in keratinocytes and fibroblasts, and
monocyte chemoattractant protein-l in fibroblasts, In the chick embryo chorioallantoic membrane assay,
APC promoted the granulation/remodeling phases of wound healing by markedly stimulating angiogenesis as
well as promoting reepithelialization, In a full-thickness rat skin-healing model, a single topical application of
APC enhanced wound healing compared to saline control. APC-treated wounds had markedly more blood
vessels on day 7 and a significantly lower infiltration of neutrophils at days 4 and 7. The broad spectrum matrix
metallo-protein as, GM600l, prevented the ability of APC to promote wound healing, In summary, our results
show that APC promotes cutaneous wound healing via a complex mechanism involving stimulation of
angiogenesis and inhibition of inflammation, These unique properties of APC make it an attractive therapeutic
agent to promote the healing of chronic wounds.
