Identification of der(1;19)(q10;p10) in five oligodendrogliomas suggests mechanism of concurrent 1p and 19q loss

被引:220
作者
Griffin, Constance A.
Burger, Peter
Morsberger, Laura
Yonescu, Raluca
Swierczynski, Sharon
Weingart, Jon D.
Murphy, Kathleen M.
机构
[1] Johns Hopkins Univ Hosp, Dept Pathol, Baltimore, MD 21287 USA
[2] Johns Hopkins Univ Hosp, Dept Oncol, Baltimore, MD 21287 USA
[3] Johns Hopkins Univ Hosp, Dept Neurosurg, Baltimore, MD 21287 USA
关键词
brain tumor; chromosome; fluorescent in situ hybridization (FISH); karyotype; oligodendroglioma;
D O I
10.1097/01.jnen.0000235122.98052.8f
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Deletions of portions of chromosomes 1p and 19q are closely associated with the oligodendroglionia histologic phenotype. In most cases, 1p and 19q are codeleted, yet the mechanism of dual loss is unexplained. We report 5 cases (World Health Organization grade III) in which metaphase cytogenetics identified a derivative chromosome consisting of what appears to be the whole arms of 1q and 19p forming a der(1;19)(q10;p10). Metaphase fluorescent in situ hybridization (FISH) confirmed the derivative chromosome was composed of 1q and 19p material in 3 cases; in 2 cases with few metaphases, FISH confirmed 19p material on the derivative chromosome. In all cases, interphase FISH showed net loss of 1p and 19q in 77% to 92% of cells, and microsatellite studies were consistent with 1p and 19q loss. We hypothesize the following: occurrence of a balanced whole-arm translocation between chromosomes 1 and 19 forming 2 derivative chromosomes, one composed of 1q and 19p, the other of 1p and 19q. Subsequent loss of the der(1;19)(p10;q10) then results in the simultaneous 1p and 19q loss observed in oligodendroglionia with retention of the der(1;119)(q10;p10) seen in these cases.
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页码:988 / 994
页数:7
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