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Fluorescence in situ hybridization mapping of breakpoints in pleomorphic adenomas with 8q12–13 abnormalities identifies a subgroup of tumors without PLAG1 involvement
Author(s) -
Röijer Eva,
Kas Koen,
Behrendt Margareta,
Van de Ven Wim,
Stenman Göran
Publication year - 1999
Publication title -
genes, chromosomes and cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.754
H-Index - 119
eISSN - 1098-2264
pISSN - 1045-2257
DOI - 10.1002/(sici)1098-2264(199901)24:1<78::aid-gcc11>3.0.co;2-d
Subject(s) - breakpoint , biology , fluorescence in situ hybridization , microbiology and biotechnology , chromosome , gene , southern blot , in situ hybridization , genetics , gene expression
Recently, we identified the PLAG1 gene as the target gene in pleomorphic adenomas with chromosome abnormalities involving 8q12. The majority of breakpoints were shown to reside within the 5′ noncoding region of the gene. We now report three pleomorphic adenomas with breakpoints located distal to PLAG1 in band 8q13. These tumors had the following chromosome 8 abnormalities: ins(8;12)(q12–13;q14q15), t(8;12)(q13;q15), and t(6;8)(p21.3–22;q13). Fluorescence in situ hybridization mapping of the chromosome 8 breakpoints revealed a yeast artificial chromosome clone spanning the breakpoints in two tumors. In none of the cases was PLAG1 activated and/or disrupted. Three candidate genes, N 8, HMGIC , and HMGIY , were analyzed for rearrangements and/or abnormal expression by using reverse transcriptase‐polymerase chain reaction, rapid amplification of 3′ cDNA ends, and Northern blot analyses. Genes Chromosomes Cancer 24:78–82, 1999. © 1999 Wiley‐Liss, Inc.