The disclosed invention relates to the observation that nestin expression is a marker for endothelial cell proliferation. Nestin expression is particularly useful as a marker for angiogenesis, particularly for tumor-related angiogenesis. Specifically, nestin serves as an excellent endothelium marker for brain tumors such as gliomas, hemangioblastomas, Schwannomas, medulloblastomas, and meningiomas. Accordingly, the disclosed invention relates to the use of this marker as a basis to model angiogenic activity.
