期刊
CYTOGENETIC AND GENOME RESEARCH
卷 136, 期 4, 页码 295-302出版社
KARGER
DOI: 10.1159/000338255
关键词
Adipocytes; Chromosome territories; Fibroblasts; 3D fluorescence in situ hybridization; Gene positioning; Lipogenic genes; Nuclear organization; Pig; Transcription
资金
- Polish Ministry of Science and Higher Education [N N311 288936]
- Iuventus Plus grant [IP2010 040670]
The 3-dimensional arrangement of chromosomes and genes within a nuclear space is considered to represent the level of transcriptional regulation. Understanding how the nuclear architecture of adipocyte cells contributes to gene expression has become the subject of great interest in the context of obesity research. In this study we investigated nuclear positioning of 3 gene loci involved in lipid metabolism in the pig (Sus scrofa, SSC) which is considered as an important animal model for obesity in humans. We found that the position of the SCD gene in the 3-dimensional space of the cell nucleus is not correlated with transcriptional activity. The gene locus as well as chromosome territory SSC14 occupied the same peripheral location in adipocyte and fibroblast cells, in spite of the fact that their transcription level differs significantly between both cell types. For the 2 other investigated genes, i.e. ACACA and SREBF1 and their chromosome territory (SSC12), slightly different nuclear locations were found. They occupied intermediate nuclear positions in fibroblast nuclei, while in adipocytes they were positioned in the nuclear interior. The more internal location of these genes corresponds to increased transcription levels in fat cells. Our results confirm the non-random position of genes and chromosome territories in nuclei of adult porcine cells and indicate that relationship between transcription activity and gene positioning exists only for some but not all genes. Copyright (C) 2012 S. Karger AG, Basel
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