Virtual radiation biophysics: implications of nuclear structure.

Abstract:

:The non-random positioning of chromosome territories (CTs) in lymphocyte cell nuclei has raised the question whether systematic chromosome-chromosome associations exist which have significant influence on interchange rates. In such a case the spatial proximity of certain CTs or even of clusters of CTs is expected to increase the respective exchange yields significantly, in comparison to a random association of CTs. In the present study we applied computer simulated arrangements of CTs to calculate interchange frequencies between all heterologous CT pairs, assuming a uniform action of the molecular repair machinery. For the positioning of CTs in the virtual nuclear volume we assumed a) a statistical, and b) a gene density-correlated arrangement. The gene density-correlated arrangement regards the more experimentally observed interior localization of gene-rich and the more peripheral positioning of gene-poor CTs. Regarding one-chromosome yields, remarkable differences for single CTs were observed taking into account the gene density-correlated distribution of CTs.

journal_name

Cytogenet Genome Res

authors

Kreth G,Finsterle J,Cremer C

doi

10.1159/000077481

keywords:

subject

Has Abstract

pub_date

2004-01-01 00:00:00

pages

157-61

issue

1-4

eissn

1424-8581

issn

1424-859X

pii

77481

journal_volume

104

pub_type

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