In this work, we have studied the structural and functional linkage between lamin A/C, nuclear actin, and organization of chromosome territories (CTs) in mammary carcinoma MCF-7 cells. Selective down-regulation of lamin A/C expression led to disruption of the lamin A/C perinuclear layer and disorganization of lamin-bound emerin complexes at the inner nuclear membrane. The silencing of lamin A/C expression resulted in a decrease in the volume and surface area of chromosome territories, especially in chromosomes with high heterochromatin content. Inhibition of actin polymerization led to relaxation of the structure of chromosome territories, and an increase in the volumes and surface areas of the chromosome territories of human chromosomes 1, 2 and 13. The results show an important role of polymeric actin in the organization of the nuclei and the chromosome territories.
- MeSH
- Actins metabolism MeSH
- Cell Nucleus metabolism MeSH
- Down-Regulation MeSH
- Genome, Human genetics MeSH
- Microscopy, Confocal MeSH
- Lamin Type A metabolism MeSH
- Humans MeSH
- Chromosomes, Human metabolism MeSH
- Cell Line, Tumor MeSH
- Cell Shape MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Actins MeSH
- lamin C MeSH Browser
- Lamin Type A MeSH
