PMID- 7769849 OWN - NLM STAT- MEDLINE DCOM- 19950706 LR - 20240104 IS - 0887-6924 (Print) IS - 0887-6924 (Linking) VI - 9 IP - 5 DP - 1995 May TI - Extensive amplification of bcr/abl fusion genes clustered on three marker chromosomes in human leukemic cell line K-562. PG - 858-62 AB - Using fluorescence in situ hybridization (FISH), we were able to demonstrate 22-24-fold amplification of the bcr/abl fusion gene in the human leukemic cell line K-562. About 60% of the amplified sequences are localized to a large acrocentric marker chromosome, with another 30% clustered on a small acrocentric chromosome. In addition to these two masked Ph chromosomes, the remaining bcr/abl fusion genes are located on a der(2) distal to band q33. G- and C-banding analysis revealed similar unique banding patterns in both masked Ph chromosomes and suggests that amplification occurred by tandem duplication of the bcr/abl fusion site. Because the number of bcr/abl fusion genes may be increasing over time, it is critical that researchers using K-562 cells should be aware of this extensive amplification. FAU - Wu, S Q AU - Wu SQ AD - Wisconsin Comprehensive Cancer Center, Madison, USA. FAU - Voelkerding, K V AU - Voelkerding KV FAU - Sabatini, L AU - Sabatini L FAU - Chen, X R AU - Chen XR FAU - Huang, J AU - Huang J FAU - Meisner, L F AU - Meisner LF LA - eng GR - CA14520/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Leukemia JT - Leukemia JID - 8704895 RN - 0 (DNA, Neoplasm) RN - EC 2.7.10.2 (Fusion Proteins, bcr-abl) SB - IM GS - bcr GS - bcr/abl MH - Chromosome Mapping MH - *Chromosomes, Human, Pair 22 MH - *Chromosomes, Human, Pair 9 MH - DNA, Neoplasm/genetics MH - Evaluation Studies as Topic MH - Fusion Proteins, bcr-abl/*genetics MH - *Gene Amplification MH - *Genes, abl MH - Humans MH - In Situ Hybridization, Fluorescence MH - Interphase/physiology MH - Karyotyping MH - Metaphase/physiology MH - Multigene Family MH - *Philadelphia Chromosome MH - Precursor Cell Lymphoblastic Leukemia-Lymphoma/*genetics MH - Translocation, Genetic MH - Tumor Cells, Cultured EDAT- 1995/05/01 00:00 MHDA- 1995/05/01 00:01 CRDT- 1995/05/01 00:00 PHST- 1995/05/01 00:00 [pubmed] PHST- 1995/05/01 00:01 [medline] PHST- 1995/05/01 00:00 [entrez] PST - ppublish SO - Leukemia. 1995 May;9(5):858-62.