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We examined how pigment epithelium derived factor (PEDF), an effective endogenous antiangiogenic protein, decreases survival of primary cultures of human umbilical vein endothelial cells (HUVECs) in a low serum environment supplemented with the endothelial cell growth factor (VEGF). We provide evidence that induction of apoptosis by PEDF is associated with activation of p38 followed by cleavage of...
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