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Allelotype of pediatric rhabdomyosarcoma

Abstract

An allelotype covering all autosomes was constructed for the embryonal form of childhood rhabdomyosarcoma (ERMS) in order to identify regions encompassing tumorsuppressor genes (TSG) involved in ERMS. Thusfar most studies were focussed on chromosome 11p15.5, which frequently shows loss of heterozygozity (LOH) in embryonal tumors like RMS and Wilms' tumor (WT). In this study we show that, besides LOH of chromosome 11p15.5 (72%), LOH of chromosome 16q was present in 54% of the tumors analysed. Delineation of these two regions shows that the smallest region of overlap (SRO) for chromosome 11 was between D11S988 and D11S922. This region, estimated to be 7 cM and 3-5 Mb, is also the location of the putative Wilms' tumor WT2 TSG. It contains several genes including IGF2 and potential tumorsuppressor genes like H19 and p57kip2, which might contribute to the carcinogenesis of RMS. Analysis of chromosome 16q LOH defined the SRO between D16S752 and D16S413. LOH of chromosome 16 is also found in other tumors, including WT. Our data suggest that genes involved in the development of RMS and WT may not only be similar for chromosome 11 but also for chromosome 16.

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Visser, M., Sijmons, C., Bras, J. et al. Allelotype of pediatric rhabdomyosarcoma. Oncogene 15, 1309–1314 (1997). https://doi.org/10.1038/sj.onc.1201302

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  • DOI: https://doi.org/10.1038/sj.onc.1201302

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