DST and glioblastoma: In the nervous system, Collagen XVII has been found to be often co-localized with its epithelial ligand BPAG1 and complexing with various laminins, in Muller glial cells, photoreceptors of bovine and rat tissues, while localize predominantly to the soma and proximal axons of human neurons [15], its precise role in pathogenesis of glioblastoma multiforme (GBM) is unknown.