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OBJECT Apoptosis, a key cellular response to therapeutic agents is often inactivated in tumor cells. In this study, we evaluated the expression of the tumor necrosis family of death receptors, DR4 and DR5, in medulloblastoma tumor samples and cell lines to determine if epigenetic modulation of gene expression could sensitize tumor cell lines to(More)
Brain metastasis, which occurs in 20% to 40% of all cancer patients, is an important cause of neoplastic morbidity and mortality. Successful invasion into the brain by tumor cells must include attachment to microvessel endothelial cells, penetration through the blood-brain barrier, and, of relevance, a response to brain survival and growth factors.(More)
Medulloblastoma (MB), the most devastating and common brain tumor in children, is highly invasive and extremely difficult to treat. Identifying the properties of MB tumors that cause them to invade and metastasize is therefore imperative for the development of novel treatments. We performed investigations to elucidate prognostic implications of heparanase(More)
The study of cellular differentiation encompasses many vital parts of biology and medicine. Heparan sulfate proteoglycans (HSPG) are essential and ubiquitous macromolecules associated with the cell surface and extracellular matrix (ECM) of a wide range of cells and tissues. Heparan sulfate chains (HS) of HSPG bind and sequester a multitude of extracellular(More)
Production of neurons from non-neural cells has far-reaching clinical significance. We previously found that myoblasts can be converted to a physiologically active neuronal phenotype by transferring a single recombinant transcription factor, REST-VP16, which directly activates target genes of the transcriptional repressor, REST. However, the neuronal(More)
Medulloblastoma (MB) is the most common malignant brain tumor of childhood. Although modern therapy has produced five-year survival rates as high as 70% for some MB patients, this resulted in significant long-term treatment-related morbidity. The cellular mechanisms involved in metastatic spread of medulloblastoma are largely unknown. Neurotrophins (NT)(More)
Medulloblastoma is the most common malignant childhood brain tumor. Although some previous reports have shown up to a 70% 5-year survival for some of these patients, it is at the cost of significant long-term treatment-related morbidity. The cellular mechanisms leading to metastatic disease in medulloblastoma are mainly unknown. For the first time, we(More)
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