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Novel oncogenic mutations in the WT1 Wilms' tumor suppressor gene: a t(11;22) fuses the Ewing's sarcoma gene, EWS1, to WT1 in desmoplastic small round cell tumor.

These studies suggest that the WT1 tumor suppressor gene, originally identified as a recessive oncogene in Wilms' tumors, is capable of sustaining a gain-of-function mutation which results in its contribution to a completely different disease entity: desmoplastic small round cell tumor. Two independent biochemical functions of WT1, DNA-binding activity and mode of transcriptional regulation, are altered as a consequence of the chromosomal translocation and fusion with EWS. The fusion of EWS and WT1 genes in DSRCT thus provides a unique paradigm for a means by which different alterations of transcription factor function can lead to diverse oncogenic processes.