Biological parameters for the choice of antiangiogenic therapy and efficacy monitoring.

Angiogenesis is a tightly controlled process which depends on the balance between stimulating and inhibiting factors. When this balance is disrupted, angiogenesis acquires a pathological meaning. The list of molecules able to induce angiogenesis is heterogeneous with respect to their chemical characteristics and biological properties. Quantitative measurement of tumor angiogenesis is necessary for the choice of therapeutic strategies and as an endpoint for antiangiogenic therapy. We are developing a quantitative RT-PCR with measures the expression of specific factors in real time. With the use of this rapid technique, measurement of the expression of the angiogenic factors and inhibitors is also possible in specimens as small as biopsies.