First, prostate cancer cells carry numerous genome defects which allow malignant cell growth and survival (Nelson et al, 2009).
Among these initiatives are KACST's recently funded projects to apply microarray based CGH approach to unravel genome defects in the congenital heart diseases and another to screen and diagnose the developmental delay as well as other congenital malformations.
Thus the polyploidy cells observed may represent a response to spontaneous DNA damage, replication fork collapse due to stalling in repetitive regions of the genome, defects in post-replication events such as decatenation leading to SAC activation and mitotic slippage, or a failure in cytokinesis following normal mitosis.
However, in several instances this may be due to a genome assembly defect or to unusual gene structure with extra undetected exon(s) upstream of the RBB or downstream of the B30.2.
Defective transcripts can originate from mutations in the genome, from defects in RNP assembly or from pre-mRNA maturation errors.
Importantly mutants in RNAPII show a CTF phenotype and other genome integrity defects (Stirling et al. 2011, 2012b).
Since the placenta and fetus share the same genome, genetic defects in the fetus are often mirrored in the placenta as abnormal growth patterns.
Furthermore, loss of H2A.Z decreased compaction of the CID containing the BLM10 gene, consistent with the 3C results, and even CIDs that lacked ncRNAs showed decreased compaction, consistent with a genome-wide defect in CID architecture that was independent of the transcriptional changes due to loss of H2A.Z.
10.7554/eLife.07424.013 Figure 7. Mitotic cohesin rescues transcriptional focusing but not genome-wide defects of rec8Δ mutants.
We reasoned that if HP1 knock down affects only the recruitment of cohesin to pericentric heterochromatin (which accounts for less than 15% of the human genome), then a defect in cohesin loading might not be detected with the protocol just described.
