PMID- 9885986 OWN - NLM STAT- MEDLINE DCOM- 19990604 LR - 20191024 IS - 1045-2257 (Print) IS - 1045-2257 (Linking) VI - 24 IP - 2 DP - 1999 Feb TI - Simple variant t(8;21) acute myeloid leukemias harbor insertions of the AML1 or ETO genes. PG - 165-71 AB - We report on the molecular characterization of two acute myeloid leukemias (AML), one AML-M1 (patient 1) and one AML-M2 (patient 2) with t(8;21)(p21;q22) and t(8;20)(q22;p13), respectively, at diagnosis. The locations of the breakpoints, 21q22 in patient 1 and 8q22 in patient 2, prompted us to search for a cryptic t(8;21)(q22;q22) and involvement of the AML1 and ETO genes. Dual-color fluorescence in situ hybridization (FISH) using whole chromosome painting probes for chromosomes 8, 20, and 21 confirmed the conventional cytogenetic karyotypes. However, dual-color FISH using appropriate ETO and AML1 probes disclosed an insertion of AML1 into 8q22 on the derivative chromosome 8 in patient 1 and of ETO into 21q22 on one chromosome 21 in patient 2, leading to AML1-ETO fusion signals. Both cases expressed an AML1-ETO transcript, shown by reverse transcriptase polymerase chain reaction and cDNA sequencing. Creation of functional AML1-ETO fusion genes in these two simple variant t(8;21) probably occurred through complex mechanisms, combining translocation and insertion of chromosomal segments. FAU - Taviaux, S AU - Taviaux S AD - CNRS-IGH, Montpellier, France. FAU - Brunel, V AU - Brunel V FAU - Dupont, M AU - Dupont M FAU - Fernandez, F AU - Fernandez F FAU - Ferraz, C AU - Ferraz C FAU - Carbuccia, N AU - Carbuccia N FAU - Sainty, D AU - Sainty D FAU - Demaille, J AU - Demaille J FAU - Birg, F AU - Birg F FAU - Lafage-Pochitaloff, M AU - Lafage-Pochitaloff M LA - eng PT - Case Reports 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 (AML1-ETO fusion protein, human) RN - 0 (Core Binding Factor Alpha 2 Subunit) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (RUNX1 Translocation Partner 1 Protein) RN - 0 (Recombinant Fusion Proteins) RN - 0 (Transcription Factors) SB - IM MH - Adolescent MH - Adult MH - Chromosomes, Human, Pair 12/*genetics MH - Chromosomes, Human, Pair 8/*genetics MH - Core Binding Factor Alpha 2 Subunit MH - Female MH - Humans MH - Leukemia, Myeloid, Acute/*genetics MH - Male MH - *Oncogene Proteins, Fusion MH - RUNX1 Translocation Partner 1 Protein MH - Recombinant Fusion Proteins/genetics MH - Transcription Factors/*genetics MH - Translocation, Genetic/*genetics EDAT- 1999/01/14 03:01 MHDA- 2000/06/20 09:00 CRDT- 1999/01/14 03:01 PHST- 1999/01/14 03:01 [pubmed] PHST- 2000/06/20 09:00 [medline] PHST- 1999/01/14 03:01 [entrez] AID - 10.1002/(SICI)1098-2264(199902)24:2<165::AID-GCC12>3.0.CO;2-1 [pii] AID - 10.1002/(sici)1098-2264(199902)24:2<165::aid-gcc12>3.0.co;2-1 [doi] PST - ppublish SO - Genes Chromosomes Cancer. 1999 Feb;24(2):165-71. doi: 10.1002/(sici)1098-2264(199902)24:2<165::aid-gcc12>3.0.co;2-1.