PMID- 9614909 OWN - NLM STAT- MEDLINE DCOM- 19980618 LR - 20190816 IS - 0165-4608 (Print) IS - 0165-4608 (Linking) VI - 103 IP - 2 DP - 1998 Jun TI - Detection of RB1 deletions by fluorescence in situ hybridization in malignant hematologic disorders. PG - 117-23 AB - We evaluated the usefulness of fluorescence in situ hybridization (FISH) using different-colored commercial RB1 and 13qter DNA probes to identify RB1 deletions in interphase nuclei of bone marrow from 24 patients with agnogenic myeloid metaplasia (AMM), 20 patients with multiple myeloma (MM), 21 patients with other hematologic malignancies, and 25 normal bone marrow transplant (BMT) donors. Based on the 25 normal BMT donors, the upper boundary for the normal percentage of nuclei with one RB1 signal was 6.5%. Based on eight specimens known to have a deletion of 13q14 by cytogenetic studies, the lower limit of abnormal for the percentage of nuclei with one RB1 signal was 12.5%. More than 12.5% of nuclei had a single RB1 signal in 7/24 (29%) patients with AMM and 3/20 (15%) patients with MM. None of the 21 patients with hematologic malignancies other than AMM or MM had more than 12.5% nuclei with loss of RB1. The results of this study suggest that FISH with RB1 probes is useful to detect loss of RB1 in interphase nuclei from patients with hematologic disorders who have chromosome abnormalities involving 13q14. Thus, FISH with probes for RB1 is efficacious to investigate the pathogenesis of RB1 in malignant neoplasms and is a useful adjunct to conventional cytogenetic studies in clinical practice when abnormalities of 13q14 are involved. FAU - Juneau, A L AU - Juneau AL AD - Division of Laboratory Genetics, Mayo Clinic, Rochester, MN 55905, USA. FAU - Kaehler, M AU - Kaehler M FAU - Christensen, E R AU - Christensen ER FAU - Schad, C R AU - Schad CR FAU - Zinsmeister, A R AU - Zinsmeister AR FAU - Lust, J AU - Lust J FAU - Hanson, C AU - Hanson C FAU - Dewald, G W AU - Dewald GW LA - eng PT - Journal Article PL - United States TA - Cancer Genet Cytogenet JT - Cancer genetics and cytogenetics JID - 7909240 RN - 0 (Retinoblastoma Protein) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Bone Marrow Transplantation MH - Chromosomes, Human, Pair 13/genetics MH - Female MH - *Gene Deletion MH - Hematologic Neoplasms/*genetics MH - Humans MH - In Situ Hybridization, Fluorescence MH - Male MH - Middle Aged MH - Multiple Myeloma/*genetics MH - Primary Myelofibrosis/*genetics MH - Retinoblastoma Protein/*genetics EDAT- 1998/06/06 00:00 MHDA- 1998/06/06 00:01 CRDT- 1998/06/06 00:00 PHST- 1998/06/06 00:00 [pubmed] PHST- 1998/06/06 00:01 [medline] PHST- 1998/06/06 00:00 [entrez] AID - S0165460897004081 [pii] AID - 10.1016/s0165-4608(97)00408-1 [doi] PST - ppublish SO - Cancer Genet Cytogenet. 1998 Jun;103(2):117-23. doi: 10.1016/s0165-4608(97)00408-1.