PMID- 9914164 OWN - NLM STAT- MEDLINE DCOM- 19990720 LR - 20220215 IS - 0021-9533 (Print) IS - 0021-9533 (Linking) VI - 112 ( Pt 4) DP - 1999 Feb TI - Chromosomes exhibit preferential positioning in nuclei of quiescent human cells. PG - 525-35 AB - The relative spatial positioning of chromosomes 7, 8, 16, X and Y was examined in nuclei of quiescent (noncycling) diploid and triploid human fibroblasts using fluorescence in situ hybridization (FISH) with chromosome-specific DNA probes and digital imaging. In quiescent diploid cells, interhomolog distances and chromosome homolog position maps revealed a nonrandom, preferential topology for chromosomes 7, 8 and 16, whereas chromosome X approximated a more random distribution. Variations in the orientation of nuclei on the culture substratum tended to hinder detection of an ordered chromosome topology at interphase by biasing homolog position maps towards random distributions. Using two chromosome X homologs as reference points in triploid cells (karyotype = 69, XXY), the intranuclear location of chromosome Y was found to be predictable within remarkably narrow spatial limits. Dual-FISH with various combinations of chromosome-specific DNA probes and contrasting fluorochromes was used to identify adjacent chromosomes in mitotic rosettes and test whether they are similarly positioned in interphase nuclei. From among the combinations tested, chromosomes 8 and 11 were found to be closely apposed in most mitotic rosettes and interphase nuclei. Overall, results suggest the existence of an ordered interphase chromosome topology in quiescent human cells in which at least some chromosome homologs exhibit a preferred relative intranuclear location that may correspond to the observed spatial order of chromosomes in rosettes of mitotic cells. FAU - Nagele, R G AU - Nagele RG AD - Department of Molecular Biology, University of Medicine and Dentistry of New Jersey/SOM, Stratford, New Jersey 08084, USA. nagelero@umdnj.edu FAU - Freeman, T AU - Freeman T FAU - McMorrow, L AU - McMorrow L FAU - Thomson, Z AU - Thomson Z FAU - Kitson-Wind, K AU - Kitson-Wind K FAU - Lee, H y AU - Lee Hy LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Cell Sci JT - Journal of cell science JID - 0052457 SB - IM MH - Cell Cycle/physiology MH - Cell Line MH - Cell Nucleus/*physiology MH - Chromosome Painting MH - Chromosomes/*physiology MH - Chromosomes, Human, Pair 16/physiology MH - Chromosomes, Human, Pair 7/physiology MH - Chromosomes, Human, Pair 8/physiology MH - Fibroblasts MH - Humans MH - Image Processing, Computer-Assisted MH - In Situ Hybridization, Fluorescence MH - Mitosis/physiology MH - Polyploidy MH - Resting Phase, Cell Cycle/*physiology MH - X Chromosome/physiology MH - Y Chromosome/physiology EDAT- 1999/01/23 00:00 MHDA- 1999/01/23 00:01 CRDT- 1999/01/23 00:00 PHST- 1999/01/23 00:00 [pubmed] PHST- 1999/01/23 00:01 [medline] PHST- 1999/01/23 00:00 [entrez] AID - 10.1242/jcs.112.4.525 [doi] PST - ppublish SO - J Cell Sci. 1999 Feb;112 ( Pt 4):525-35. doi: 10.1242/jcs.112.4.525.