PMID- 9096692 OWN - NLM STAT- MEDLINE DCOM- 19970429 LR - 20190914 IS - 0887-6924 (Print) IS - 0887-6924 (Linking) VI - 11 IP - 4 DP - 1997 Apr TI - Mosaicism of the 5q deletion as assessed by interphase FISH is a common phenomenon in MDS and restricted to myeloid cells. PG - 519-23 AB - Interstitial deletion of chromosome 5q is a common cytogenetic abnormality observed in MDS. We have used fluorescence in situ hybridization (FISH) to determine accurately the percentage of cytogenetically abnormal peripheral blood cells. YAC and cosmid probes localized to chromosome 5q were hybridized to interphase nuclei from purified polymorphonuclear cells (PMNs) from six MDS patients with chromosome 5 deletions. Per patient, 25-67% of the cells exhibited one signal for the 5q31-q33 specific probes IL-4, D5S207 and c-fms. This percentage was constant for the various probes utilized for each patient. Hybridization of the same probes to PMNs from healthy individuals and hybridization of probes (D5S39 and D5S498) localized outside the deleted segments to PMNs of the patients, resulted in 90-95% nuclei with two signals. In addition, FACS-purified peripheral blood cells were investigated by FISH using the IL-4 cosmid. This demonstrated that the hybridization pattern in monocytes was similar to that observed in PMNs, whereas T-lymphocytes showed no loss of signals. These results indicate that a subfraction of the myeloid progenitor cells have acquired the 5q deletion. FAU - Kroef, M J AU - Kroef MJ AD - Laboratory for Experimental Haematology, Leiden University Hospital, The Netherlands. FAU - Bolk, M J AU - Bolk MJ FAU - Muus, P AU - Muus P FAU - Wessels, J W AU - Wessels JW FAU - Beverstock, G C AU - Beverstock GC FAU - Willemze, R AU - Willemze R FAU - Landegent, J E AU - Landegent JE LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Leukemia JT - Leukemia JID - 8704895 SB - IM MH - Adult MH - Bone Marrow/ultrastructure MH - Cells, Cultured MH - *Chromosomes, Human, Pair 5 MH - *Gene Deletion MH - Humans MH - In Situ Hybridization, Fluorescence MH - Interphase MH - Middle Aged MH - Myelodysplastic Syndromes/*genetics/pathology EDAT- 1997/04/01 00:00 MHDA- 1997/04/01 00:01 CRDT- 1997/04/01 00:00 PHST- 1997/04/01 00:00 [pubmed] PHST- 1997/04/01 00:01 [medline] PHST- 1997/04/01 00:00 [entrez] AID - 10.1038/sj.leu.2400597 [doi] PST - ppublish SO - Leukemia. 1997 Apr;11(4):519-23. doi: 10.1038/sj.leu.2400597.