Background: Tenascin-C (TN-C), a large extracellular matrix (ECM) glycoprotein with a molecular weight of 180-250 kilodaltons, is present in several normal adult tissues. TN-C is up-regulated during embryogenesis, in wound healing, and in tumor tissues. Glioblastoma multiforme (GBM) is the most frequent and malignant astrocytic tumor comprised of poorly differentiated, neoplastic astrocytes.
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