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- W2506900921 abstract "Medulloblastoma (MB) is the most common malignant brain tumor in children. Even with an intensive regimen of surgery, radiation and chemotherapy, 25-30% of MB patients still die from their disease. Recent genomic analyses of MB have shed light on the molecular basis of the disease and have begun to point to novel approaches to therapy. However, the vast majority of these studies have focused on primary tumors, and relatively few have examined the biology of leptomeningeal metastasis (LM), the spread of tumor cells through the meninges to the brain and spinal cord. LM, most commonly seen in patients with MYC-driven (Group 3) MB, is not amenable to surgical resection and is associated with extremely poor patient outcomes. To understand the mechanisms driving metastasis, we used a mouse model of MYC-driven MB in which tumor cells exhibit LM. Importantly, we found that when primary and metastatic cells from this model are injected into the cerebrospinal fluid, primary cells tend to give rise to primary tumors whereas metastatic cells are more likely to regenerate metastatic lesions. To identify pathways that mediate this difference in metastatic potential, we compared gene expression in primary vs. metastatic tumor cells from our animal model, as well as from MB patients. Our studies revealed activation of signaling pathways involved in cell motility and adhesion to the extracellular matrix, and identified genes that are commonly activated in the metastatic compartment in both mouse and human MB. Ongoing studies are focused on validating differential expression of these genes and determining their function using in vitro and in vivo assays. These studies will provide critical insight into the mechanisms of metastasis in MB and yield novel approaches for treating metastatic disease." @default.
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- W2506900921 date "2015-11-01" @default.
- W2506900921 modified "2023-09-23" @default.
- W2506900921 title "PTPS-17LEPTOMENINGEAL METASTASIS IN MYC-DRIVEN MEDULLOBLASTOMA" @default.
- W2506900921 doi "https://doi.org/10.1093/neuonc/nov228.17" @default.
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