TMPRSS15 and glioblastoma: We first analyzed enteropeptidase gene (TMPRSS15) expression by qRT-PCR in the following cancer cell lines: MDA-MB231 (breast), MCF7 (breast), A549 (lung), U-87 MG (glioblastoma-astrocytoma), KATO-III (stomach), HT-29 (colon), and CACO-2 (colon).