Abstract
The most common malignant germ cell tumor of early childhood is the endodermal sinus tumor (CEST), also known as yolk sac tumor. Previous cytogenetic studies of CEST have demonstrated recurrent deletion of distal regions of chromosomes 1p and 6q. Studies utilizing comparative genomic hybridization have likewise demonstrated loss of distal 6q, however these studies show discrepant data concerning chromosome 1 abnormalities. This study analyses 18 CESTs for loss of heterozygosity (LOH) of distal chromosome 6q utilizing 17 microsatellite markers and 13 tumors were analysed for LOH of distal 1p using two microsatellite markers. LOH of 6q was found in 13/18 tumors (72 %). This data confirms that loss of genetic material on 6q is one of the most common abnormalities in CESTs and narrows the region of loss, enabling candidate tumor suppressor genes to be identified and analysed. In addition, LOH of 1p36 was identified in five of 11 informative tumors, clarifying prior conflicting data and confirming that 1p deletion is a common event in CESTs.
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Acknowledgements
This study was supported by the American Cancer Society RPG-97-113-01-CCE (EP) and the Dr Mildred Scheel grant from the German Cancer Aid (D Schneider), NIH UIOCA 28476 (EP), and NIH UIOCA 20549 (S Lauer). We also gratefully acknowledge the support of the Children's Cancer Foundation.
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Hu, J., Schuster, A., Fritsch, M. et al. Deletion mapping of 6q21-26 and frequency of 1p36 deletion in childhood endodermal sinus tumors by microsatellite analysis. Oncogene 20, 8042–8044 (2001). https://doi.org/10.1038/sj.onc.1204961
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DOI: https://doi.org/10.1038/sj.onc.1204961
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