Abstract: We have now discovered that partially deglycosylated vitamin D binding protein (DBP-maf) is anti-tumorigenic not wholly via an immune mechanism but in part via an antiangiogenic mechanism. Accordingly, the present invention relates to use of DBP-maf in the treatment of diseases associated with increased or abnormal angiogenesis and/or endothelial cell differentiation. Preferably, the DBP-maf is administered to the patient by sustained release or in pulses. Pulse therapy is not a form of discontinuous administration of the same account of a composition over time, but comprises administration of the same dose of the composition at a reduced frequency or administration of reduced doses.