Several reports on uPAR mRNA and uPAR protein expression, on kinetic analysis of uPA-uPAR binding, and on the implementation of RNAi and uPAR antisense-expressing plasmids to inhibit uPAR expression, point to the important role of uPAR in the progression of malignant tumors of the nervous system such as astrocytoma, neuroblastoma, glioma and glioblastoma [3, 16, 55, 56]. This evidence concerns the gene PLAUR and central nervous system cancer.