PMID- 12759924 OWN - NLM STAT- MEDLINE DCOM- 20030728 LR - 20061115 IS - 1045-2257 (Print) IS - 1045-2257 (Linking) VI - 37 IP - 3 DP - 2003 Jul TI - Heterogeneous pattern of chromosomal breakpoints involving the MYC locus in multiple myeloma. PG - 261-9 AB - Chromosomal rearrangements of the MYC locus, which often involve the IG loci, are recurrent events in multiple myeloma (MM) and plasma cell leukemia (PCL). We used dual-color fluorescence in situ hybridization (FISH) to characterize the breakpoint locations of chromosomal translocations/rearrangements involving the MYC locus at 8q24 found in a panel of 14 MM cell lines and 70 primary tumors (66 MM and 4 PCL). MYC locus alterations were observed in 21 cases: MYC/IG (mainly IGH@) fusions in 11 cell lines and three patients (2 MM and 1 PCL), and extra signals and/or abnormal MYC localizations in seven patients (5 MM and 2 PCL). Fourteen of these cases were investigated by FISH analyses by use of a panel of BAC clones covering about 6 Mb encompassing the MYC locus. The breakpoints were localized in a region 100-250 kb centromeric to MYC in four cases, a region 500-800 kb telomeric to the gene in four cases, and regions > or = 2 Mb centromeric or telomeric to MYC in five cases. Two different breakpoints were detected in the KMS-18 cell line, whereas the insertion of a MYC allele was found in a complex t(16;22) chromosomal translocation in the RPMI8226 cell line. Our data document a relatively high dispersion of 8q24 breakpoints in MM. CI - Copyright 2003 Wiley-Liss, Inc. FAU - Fabris, Sonia AU - Fabris S AD - Laboratorio di Ematologia Sperimentale e Genetica Molecolare, U.O. Ematologia 1, Dipartimento di Scienze Mediche, Universita degli Studi di Milano, Ospedale Maggiore IRCCS, Italy. FAU - Storlazzi, Clelia Tiziana AU - Storlazzi CT FAU - Baldini, Luca AU - Baldini L FAU - Nobili, Lucia AU - Nobili L FAU - Lombardi, Luigia AU - Lombardi L FAU - Maiolo, Anna Teresa AU - Maiolo AT FAU - Rocchi, Mariano AU - Rocchi M FAU - Neri, Antonino AU - Neri A LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Genes Chromosomes Cancer JT - Genes, chromosomes & cancer JID - 9007329 RN - 0 (Genetic Markers) RN - 0 (Oncogene Proteins, Fusion) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Cell Line, Transformed MH - Chromosome Breakage/*genetics MH - Chromosomes, Human, Pair 8/genetics MH - Female MH - Gene Rearrangement/genetics MH - Genes, myc/*genetics MH - *Genetic Heterogeneity MH - Genetic Markers/*genetics MH - Humans MH - In Situ Hybridization, Fluorescence MH - Male MH - Middle Aged MH - Multiple Myeloma/*genetics/pathology MH - Oncogene Proteins, Fusion/genetics MH - Translocation, Genetic/genetics MH - Tumor Cells, Cultured EDAT- 2003/05/22 05:00 MHDA- 2003/07/29 05:00 CRDT- 2003/05/22 05:00 PHST- 2003/05/22 05:00 [pubmed] PHST- 2003/07/29 05:00 [medline] PHST- 2003/05/22 05:00 [entrez] AID - 10.1002/gcc.10211 [doi] PST - ppublish SO - Genes Chromosomes Cancer. 2003 Jul;37(3):261-9. doi: 10.1002/gcc.10211.