Short-term molecular consequences of chromosome mis-segregation for genome stability

Lorenza Garribba, Giuseppina De Feudis, Valentino Martis, Martina Galli, Marie Dumont, Yonatan Eliezer, René Wardenaar, Marica Rosaria Ippolito, Divya Ramalingam Iyer, Andréa E Tijhuis, Diana C J Spierings, Michael Schubert, Silvia Taglietti, Chiara Soriani, Simon Gemble, Renata Basto, Nick Rhind, Floris Foijer, Uri Ben-David, Daniele FachinettiYlli Doksani, Stefano Santaguida*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

9 Citaten (Scopus)
43 Downloads (Pure)


Chromosome instability (CIN) is the most common form of genome instability and is a hallmark of cancer. CIN invariably leads to aneuploidy, a state of karyotype imbalance. Here, we show that aneuploidy can also trigger CIN. We found that aneuploid cells experience DNA replication stress in their first S-phase and precipitate in a state of continuous CIN. This generates a repertoire of genetically diverse cells with structural chromosomal abnormalities that can either continue proliferating or stop dividing. Cycling aneuploid cells display lower karyotype complexity compared to the arrested ones and increased expression of DNA repair signatures. Interestingly, the same signatures are upregulated in highly-proliferative cancer cells, which might enable them to proliferate despite the disadvantage conferred by aneuploidy-induced CIN. Altogether, our study reveals the short-term origins of CIN following aneuploidy and indicates the aneuploid state of cancer cells as a point mutation-independent source of genome instability, providing an explanation for aneuploidy occurrence in tumors.

Originele taal-2English
Aantal pagina's17
TijdschriftNature Communications
StatusPublished - 11-mrt.-2023

Citeer dit