PMID- 15481442 OWN - NLM STAT- MEDLINE DCOM- 20041207 LR - 20191026 IS - 0925-5710 (Print) IS - 0925-5710 (Linking) VI - 80 IP - 2 DP - 2004 Aug TI - Simultaneous demonstration of clonal chromosome abnormalities and apoptosis in individual marrow cells in myelodysplastic syndrome. PG - 140-5 AB - Bone marrow samples from 18 patients with myelodysplastic syndrome (MDS) with clonal cytogenetic abnormalities were characterized by combining fluorescence in situ hybridization (FISH) with in situ end-labeling (ISEL) or with annexin V staining and flow cytometry (AV/FLOW) to determine the clonal nature of hematopoietic cells undergoing apoptosis in marrow cells. Apoptosis occurred in both normal and clonal cells. However, the proportion of clonal cells identified by FISH among apoptotic cells was lower than the proportion among nonclonal cells in 17 of 18 patients, regardless of whether ISEL or AV/ FLOW was used to identify apoptosis. This technique allows us to identify simultaneously clonality (as determined by FISH) and apoptosis in individual cells and shows that although apoptosis occurs predominantly in residual normal (FISH-negative) cells, a proportion of clonal precursors in MDS marrow also die from programmed cell death. Such a mechanism may be responsible for the generally slow expansion of the clone in MDS. FAU - Li, Xiao AU - Li X AD - Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109-1024, USA. FAU - Bryant, C Eileen AU - Bryant CE FAU - Deeg, H Joachim AU - Deeg HJ LA - eng GR - CA87948/CA/NCI 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 - Japan TA - Int J Hematol JT - International journal of hematology JID - 9111627 SB - IM MH - Aged MH - *Apoptosis MH - Bone Marrow Cells/cytology/*pathology MH - *Chromosome Aberrations MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - Male MH - Middle Aged MH - Myelodysplastic Syndromes/*genetics/pathology EDAT- 2004/10/16 09:00 MHDA- 2004/12/16 09:00 CRDT- 2004/10/16 09:00 PHST- 2004/10/16 09:00 [pubmed] PHST- 2004/12/16 09:00 [medline] PHST- 2004/10/16 09:00 [entrez] AID - 10.1532/ijh97.na0402 [doi] PST - ppublish SO - Int J Hematol. 2004 Aug;80(2):140-5. doi: 10.1532/ijh97.na0402.