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Learn MoreGroup 3 medulloblastoma is often associated with MYC amplification or overexpression, while whether MYC overexpression alone is sufficient to induce tumorigenesis is unknown and the cell type(s) which can be transformed by MYC is unclear. Here, by generating a new mouse model, we demonstrated that overexpression of Myc alone is sufficient to transform astrocyte progenitors and granule neuron progenitors (GNP) in the early postnatal cerebellum following orthotopic transplantation. The resulting tumors resemble human Group 3 medulloblastoma in terms of both histology and gene expression profiles. Using these models we found that inhibition of lactate dehydrogenase A (LDHA) significantly reduced both murine and human MYC-driven tumor growth, but did not affect SHH medulloblastoma, indicating that LDHA is potential and specific therapeutic target for MYC-driven medulloblastoma. SOURCE: Yanxin Pei (ypei@cnmc.org) - Children's National Medical Center
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