TY - JOUR
T1 - CDK5RAP3, a New BRCA2 Partner That Regulates DNA Repair, Is Associated with Breast Cancer Survival
AU - Minguillón Pedreño, Jordi
AU - Bogliolo, Massimo
AU - Surrallés i Calonge, Jordi
AU - Rovirosa Mulet, Llorenç
AU - Bustamante-Madrid, Pilar
AU - Camps-Fajol, Cristina
AU - de Garibay, Gorka Ruiz
AU - Shimelis, Hermela
AU - Montanuy Escribano, Helena
AU - Pujol, Roser
AU - Hernandez, Gonzalo
AU - Castillo, Pau
AU - Soucy, Penny
AU - Martrat, Griselda
AU - Gómez Moruno, Antonio
AU - Cuadras, Daniel
AU - García, María J
AU - Gayarre, Javier
AU - Lázaro Garcia, Conxi
AU - Benitez, Javier
AU - Couch, Fergus J.
AU - Pujana, Miquel Ángel
PY - 2022
Y1 - 2022
N2 - BRCA2 is essential for homologous recombination DNA repair. BRCA2 mutations lead to genome instability and increased risk of breast and ovarian cancer. Similarly, mutations in BRCA2-interacting proteins are also known to modulate sensitivity to DNA damage agents and are established cancer risk factors. Here we identify the tumor suppressor CDK5RAP3 as a novel BRCA2 helical domain-interacting protein. CDK5RAP3 depletion induced DNA damage resistance, homologous recombination and single-strand annealing upregulation, and reduced spontaneous and DNA damage-induced genomic instability, suggesting that CDK5RAP3 negatively regulates double-strand break repair in the S-phase. Consistent with this cellular phenotype, analysis of transcriptomic data revealed an association between low CDK5RAP3 tumor expression and poor survival of breast cancer patients. Finally, we identified common genetic variations in the CDK5RAP3 locus as potentially associated with breast and ovarian cancer risk in BRCA1 and BRCA2 mutation carriers. Our results uncover CDK5RAP3 as a critical player in DNA repair and breast cancer outcomes.
AB - BRCA2 is essential for homologous recombination DNA repair. BRCA2 mutations lead to genome instability and increased risk of breast and ovarian cancer. Similarly, mutations in BRCA2-interacting proteins are also known to modulate sensitivity to DNA damage agents and are established cancer risk factors. Here we identify the tumor suppressor CDK5RAP3 as a novel BRCA2 helical domain-interacting protein. CDK5RAP3 depletion induced DNA damage resistance, homologous recombination and single-strand annealing upregulation, and reduced spontaneous and DNA damage-induced genomic instability, suggesting that CDK5RAP3 negatively regulates double-strand break repair in the S-phase. Consistent with this cellular phenotype, analysis of transcriptomic data revealed an association between low CDK5RAP3 tumor expression and poor survival of breast cancer patients. Finally, we identified common genetic variations in the CDK5RAP3 locus as potentially associated with breast and ovarian cancer risk in BRCA1 and BRCA2 mutation carriers. Our results uncover CDK5RAP3 as a critical player in DNA repair and breast cancer outcomes.
KW - BRCA2
KW - Breast cancer
KW - CDK5RAP3
KW - DNA repair
KW - Chemoresistance
U2 - 10.3390/cancers14020353
DO - 10.3390/cancers14020353
M3 - Article
C2 - 35053516
SN - 2072-6694
VL - 14
JO - Cancers
JF - Cancers
IS - 2
ER -