PMID- 9491326 OWN - NLM STAT- MEDLINE DCOM- 19980319 LR - 20171116 IS - 1045-2257 (Print) IS - 1045-2257 (Linking) VI - 21 IP - 2 DP - 1998 Feb TI - Pre-clinical evaluation of probes to detect t(8;21) AML minimal residual disease by fluorescence in situ hybridization. PG - 144-51 AB - The 8;21 translocation in acute myeloid leukemia (AML) results in a consistent fusion transcript, AML1/ETO. Long-term clinical remission occurs in some patients despite incomplete eradication of AML1/ETO as demonstrated by RT-PCR, thus limiting the usefulness of this assay. An important future goal will be to determine if there is a level of minimal residual disease (MRD) in patients below which relapse is unlikely. For the detection of MRD, we have developed reagents for fluorescence in situ hybridization (FISH) that identify both derivative 8 and 21 chromosomes with a high analytical sensitivity. In t(8;21) AML cells, two fused signals were detected in addition to the normal 8 and 21 alleles. The sensitivity and specificity of this probe mixture were analyzed in cell lines and patient bone marrows. One and two randomly juxtaposed signals were observed in 2.4 and 0.04% of normal cells, respectively. However, these were easily differentiated from t(8;21) cells by the absence of signals from the normal alleles. Using as criteria the presence of two fused signals plus the normal alleles, we observed no false positives among 5,000 normal cells. The probe correctly identified 20/20 patients with t(8;21) AML and 10/10 non-t(8;21) patients. In cell dilution experiments, the analytical sensitivity of this reagent was equal to that of the X chromosome and Y chromosome alpha-satellite probes. These optimized probes should facilitate the quantitative assessment and study of MRD in t(8;21) AML. FAU - Paskulin, G A AU - Paskulin GA AD - University of Colorado Health Sciences Center, Medical Oncology Division, Denver, USA. FAU - Philips, G AU - Philips G FAU - Morgan, R AU - Morgan R FAU - Sandberg, A AU - Sandberg A FAU - Richkind, K AU - Richkind K FAU - Borovik, C AU - Borovik C FAU - McGavran, L AU - McGavran L FAU - Rabinovich, N AU - Rabinovich N FAU - Dietz-Band, J AU - Dietz-Band J FAU - Erickson, P AU - Erickson P FAU - Drabkin, H AU - Drabkin H FAU - Varella-Garcia, M AU - Varella-Garcia M LA - eng GR - CA46934/CA/NCI NIH HHS/United States GR - P01HDO17449/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. 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 (DNA Probes) RN - 0 (Fluorescent Dyes) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (RUNX1 Translocation Partner 1 Protein) RN - 0 (Recombinant Fusion Proteins) RN - 0 (Transcription Factors) SB - IM MH - Bone Marrow Cells/pathology MH - Chromosome Mapping MH - Chromosomes, Human, Pair 21/*genetics MH - Chromosomes, Human, Pair 8/*genetics MH - Core Binding Factor Alpha 2 Subunit MH - *DNA Probes MH - *Fluorescent Dyes MH - Humans MH - In Situ Hybridization, Fluorescence MH - Leukemia, Myeloid, Acute/diagnosis/*genetics MH - Neoplasm, Residual/diagnosis/*genetics MH - *Oncogene Proteins, Fusion MH - RUNX1 Translocation Partner 1 Protein MH - Recombinant Fusion Proteins/analysis/genetics MH - Sensitivity and Specificity MH - Transcription Factors/analysis/genetics MH - *Translocation, Genetic EDAT- 1998/03/10 03:03 MHDA- 2000/06/20 09:00 CRDT- 1998/03/10 03:03 PHST- 1998/03/10 03:03 [pubmed] PHST- 2000/06/20 09:00 [medline] PHST- 1998/03/10 03:03 [entrez] AID - 10.1002/(SICI)1098-2264(199802)21:2<144::AID-GCC10>3.0.CO;2-R [pii] PST - ppublish SO - Genes Chromosomes Cancer. 1998 Feb;21(2):144-51.