A synthetic lethal dependency on casein kinase 2 in response to replication-perturbing therapeutics in RB1-deficient cancer cells

Daria Bulanova, Yevhen Akimov, Wojciech Senkowski, Jaana Oikkonen, Laura Gall-Mas, Sanna Timonen, Manar Elmadani, Johanna Hynninen, Sampsa Hautaniemi, Tero Aittokallio, Krister Wennerberg

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review


Resistance to therapy commonly develops in patients with high-grade serous ovarian carcinoma (HGSC) and triple-negative breast cancer (TNBC), urging the search for improved therapeutic combinations and their predictive biomarkers. Starting from a CRISPR knockout screen, we identified that loss of RB1 in TNBC or HGSC cells generates a synthetic lethal dependency on casein kinase 2 (CK2) for surviving the treatment with replication-perturbing therapeutics such as carboplatin, gemcitabine, or PARP inhibitors. CK2 inhibition in RB1-deficient cells resulted in the degradation of another RB family cell cycle regulator, p130, which led to S phase accumulation, micronuclei formation, and accelerated PARP inhibition-induced aneuploidy and mitotic cell death. CK2 inhibition was also effective in primary patient-derived cells. It selectively prevented the regrowth of RB1-deficient patient HGSC organoids after treatment with carboplatin or niraparib. As about 25% of HGSCs and 40% of TNBCs have lost RB1 expression, CK2 inhibition is a promising approach to overcome resistance to standard therapeutics in large strata of patients.

TidskriftScience Advances
Antal sidor15
StatusPublicerad - 24 maj 2024
MoE-publikationstypA1 Tidskriftsartikel-refererad


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