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Xp11 translocation renal cell carcinoma is a rare disease diagnosed in children and adolescents in the advanced stage with an aggressive clinical course. Various gene fusions including the transcription factor E3 (TFE3) gene located on chromosome X cause the tumor. We established an Xp11 translocation renal cell carcinoma cell line from a renal tumor in a 18-y-old Japanese female and named it "S-TFE." The cell line and its xenograft demonstrated definite gene fusion including TFE3. They showed strong nuclear staining for TFE3 in immunohistochemistry, TFE3 gene rearrangement in dual-color, break-apart FISH analysis and ASPL-TFE3 type 1 fusion transcripts detected by RT-PCR and direct DNA sequencing. Although many renal cell carcinoma cell lines have been established and investigated, only a few cell lines are recognized as Xp11.2 translocation carcinoma. S-TFE will be useful to examine the characteristics and drug susceptibility of Xp11 translocation renal cell carcinoma.
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Hirobe et al. (2013) studied this question.
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