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The architecture of chicken chromosome territories changes during differentiation

Stadler, S., Schnapp, V., Mayer, R., Stein, S., Cremer, C., Bonifer, C., Cremer, T. and Dietzel, S. (2004) The architecture of chicken chromosome territories changes during differentiation. BMC Cell Biology, 5 (44). ISSN 1471-2121

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Abstract

BACKGROUND: Between cell divisions the chromatin fiber of each chromosome is restricted to a subvolume of the interphase cell nucleus called chromosome territory. The internal organization of these chromosome territories is still largely unknown.

RESULTS: We compared the large-scale chromatin structure of chromosome territories between several hematopoietic chicken cell types at various differentiation stages. Chromosome territories were labeled by fluorescence in situ hybridization in structurally preserved nuclei, recorded by confocal microscopy and evaluated visually and by quantitative image analysis. Chromosome territories in multipotent myeloid precursor cells appeared homogeneously stained and compact. The inactive lysozyme gene as well as the centromere of the lysozyme gene harboring chromosome located to the interior of the chromosome territory. In further differentiated cell types such as myeloblasts, macrophages and erythroblasts chromosome territories appeared increasingly diffuse, disaggregating to separable substructures. The lysozyme gene, which is gradually activated during the differentiation to activated macrophages, as well as the centromere were relocated increasingly to more external positions.

CONCLUSIONS: Our results reveal a cell type specific constitution of chromosome territories. The data suggest that a repositioning of chromosomal loci during differentiation may be a consequence of general changes in chromosome territory morphology, not necessarily related to transcriptional changes.

Item Type: Article
Copyright, Publisher and Additional Information: © 2004 Stadler et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds)
The University of Leeds > Faculty of Medicine and Health (Leeds) > Institute of Molecular Medicine (LIMM) (Leeds) > Section of Genetics (Leeds)
Depositing User: Sherpa Assistant
Date Deposited: 13 Mar 2006
Last Modified: 26 Jun 2014 16:40
Published Version: http://www.biomedcentral.com/1471-2121/5/44
Status: Published
Refereed: Yes
Identification Number: 10.1186/1471-2121-5-44
URI: http://eprints.whiterose.ac.uk/id/eprint/932

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