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A new complex rearrangement involving the ETV6 , LOC115548 , and MN1 genes in a case of acute myeloid leukemia
Author(s) -
Belloni Elena,
Trubia Maurizio,
Mancini Marco,
Derme Valentina,
Nanni Mauro,
Lahortiga Idoya,
Riccioni Roberta,
Confalonieri Stefano,
LoCoco Francesco,
Di Fiore Pier Paolo,
Pelicci Pier Giuseppe
Publication year - 2004
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/gcc.20081
Subject(s) - etv6 , biology , chromosomal translocation , derivative chromosome , fusion gene , genetics , gene , haploinsufficiency , myeloid leukemia , fluorescence in situ hybridization , chromosome 21 , microbiology and biotechnology , chromosome 22 , chromosomal rearrangement , chromosome 15 , chromosome , karyotype , cancer research , phenotype
A new complex rearrangement involving chromosome bands 5q13, 12p13, 22q11, and 3q12 was identified and characterized in a patient with acute myeloid leukemia. Fluorescence in situ hybridization showed the involvement of the ETV6 gene in 12p13. ETV6 primers were specifically designed for 3′‐ and 5′‐RACE‐PCR experiments, which led to the identification of the other two rearranged genes. The derivative chromosome 5 harbored a fusion of the ETV6 sequence with that of the LOC115548 gene. The two genes were placed in opposite orientation and did not encode a fusion protein. On the derivative chromosome 12, ETV6 was fused to the MN1 gene on chromosome 22. Also in this case, the insertion, within the MN1 sequence, of a portion of chromosome 3 prevented the formation of a fusion protein. Finally, the derivative chromosome 22 contained the 3′ portions of both LOC115548 and MN1 , and no fusion transcript with coding potential could be predicted. In conclusion, all chromosome breakpoints led to the truncation of the three involved genes in the absence of predicted fusion proteins. This study lends further support to the hypothesis that gene disruption resulting in either loss of function or haploinsufficiency may be relevant in acute myeloid leukemia pathogenesis. © 2004 Wiley‐Liss, Inc.