The present invention relates to use of a transglutaminase in the
preparation of a medicament for inhibiting angiogenesis. Preferably, the
transglutaminase is a human tissue transglutaminase. Advantageously, the
medicament is for treating cancer, rheumatoid arthritis, retinopathy
and/or psoriasis. Additionally, the invention relates to compositions
comprising a transglutaminase in an amount sufficient to inhibit
angiogenesis.