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Kaur et al.: Loss of TP53 in sarcomas with 17p12 to approximately p11 gain. A fine-resolution oligonucleotide array comparative genomic hybridization study.

Kaur S, Larramendy ML, Vauhkonen H, Böhling T, Knuutila S.
The amplification or gain of the p-arm of chromosome 17 is common in sarcomas, suggesting its role in carcinogenesis. Here, we report the architectural structure and targets of 17p aberrations commonly shared by osteosarcoma (OS), leiomyosarcoma (LMS) and malignant fibrous histiocytoma (MFH) of soft tissue. Two low-grade and two high-grade soft tissue LMS, three OS, and two MFH samples were studied using fine-resolution oligonucleotide-based microarray comparative genomic hybridization. Eight of the nine samples showed a loss of 17pter-->p13, the locus of tumor suppressor TP53 preceding the amplified area 17p12-->p11.2. The size and detailed architecture of the amplified region of 17p differed between the studied sarcoma entities. OS and high-grade LMS showed similar complex patterns of discontinuous amplifications with regions of gain in between. MFH and low-grade LMS showed continuous regions of gains and amplifications. Precise boundaries of the lost or gained regions were determined, and in addition to the previously suggested targets of the region, ELAC and FLCN were amplified in all the sarcoma entities. Copyright 2007 S. Karger AG, Basel.
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2007-08-02 15:26:34 by Sippy Kaur
2007-08-16 18:11:40 by Ilari Scheinin

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