Rongrong Wu1,2, Ankit Patel1, Yoshihisa Tokumaru3, Mariko Asaoka2, Masanori Oshi1,4, Li Yan5, Takashi Ishikawa2, Kazuaki Takabe6,7,8,9,10,11. 1. Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Elm & Carlton Streets, Buffalo, NY, 14263, USA. 2. Department of Breast Surgery and Oncology, Tokyo Medical University, Tokyo, 160-8402, Japan. 3. Department of Surgical Oncology, Graduate School of Medicine, Gifu University, Gifu, 501-1193, Japan. 4. Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, 236-0004, Japan. 5. Department of Biostatistics & Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA. 6. Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Elm & Carlton Streets, Buffalo, NY, 14263, USA. kazuaki.takabe@roswellpark.org. 7. Department of Breast Surgery and Oncology, Tokyo Medical University, Tokyo, 160-8402, Japan. kazuaki.takabe@roswellpark.org. 8. Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, 236-0004, Japan. kazuaki.takabe@roswellpark.org. 9. Department of Surgery, Jacobs School of Medicine and Biomedical Sciences, State University of New York, Buffalo, NY, 14263, USA. kazuaki.takabe@roswellpark.org. 10. Department of Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan. kazuaki.takabe@roswellpark.org. 11. Department of Breast Surgery, Fukushima Medical University, Fukushima, Japan. kazuaki.takabe@roswellpark.org.
Abstract
PURPOSE: Although the DNA repair mechanism is important in preventing carcinogenesis, its activation in established cancer cells may support their proliferation and aggravate cancer progression. RAD51 cooperates with BRCA2 and is essential in the homologous recombination of DNA repair. To this end, we hypothesized that RAD51 gene expression is associated with cancer cell proliferation and poor prognosis of breast cancer (BC) patients. METHODS: A total of 8515 primary BC patients with transcriptome and clinical data from 17 independent cohorts were analyzed. The median value was used to divide each cohort into high and low RAD51 expression groups. RESULTS: High RAD51 expression enriched the DNA repair gene set and was correlated with DNA repair-related genes. Nottingham histological grade, Ki67 expression and cell proliferation-related gene sets (E2F Targets, G2M Checkpoint and Myc Targets) were all significantly associated with the high RAD51 BC group. RAD51 expression was positively correlated with Homologous Recombination Deficiency, as well as both mutational burden and neoantigens that accompanied a higher infiltration of immune cells. Primary BC with lymph node metastases was associated with high expression of RAD51 in two cohorts. There was no strong correlation between RAD51 expression and drug sensitivity in cell lines, and RAD51 expression was lower after the neoadjuvant chemotherapy compared to before the treatment. High RAD51 BC was associated with poor prognosis consistently in three independent cohorts. CONCLUSION: RAD51 gene expression is associated with aggressive cancer biology, cancer cell proliferation, and poor survival in breast cancer.
PURPOSE: Although the DNA repair mechanism is important in preventing carcinogenesis, its activation in established cancer cells may support their proliferation and aggravate cancer progression. RAD51 cooperates with BRCA2 and is essential in the homologous recombination of DNA repair. To this end, we hypothesized that RAD51 gene expression is associated with cancer cell proliferation and poor prognosis of breast cancer (BC) patients. METHODS: A total of 8515 primary BC patients with transcriptome and clinical data from 17 independent cohorts were analyzed. The median value was used to divide each cohort into high and low RAD51 expression groups. RESULTS: High RAD51 expression enriched the DNA repair gene set and was correlated with DNA repair-related genes. Nottingham histological grade, Ki67 expression and cell proliferation-related gene sets (E2F Targets, G2M Checkpoint and Myc Targets) were all significantly associated with the high RAD51 BC group. RAD51 expression was positively correlated with Homologous Recombination Deficiency, as well as both mutational burden and neoantigens that accompanied a higher infiltration of immune cells. Primary BC with lymph node metastases was associated with high expression of RAD51 in two cohorts. There was no strong correlation between RAD51 expression and drug sensitivity in cell lines, and RAD51 expression was lower after the neoadjuvant chemotherapy compared to before the treatment. High RAD51 BC was associated with poor prognosis consistently in three independent cohorts. CONCLUSION: RAD51 gene expression is associated with aggressive cancer biology, cancer cell proliferation, and poor survival in breast cancer.
Authors: A Llop-Guevara; S Loibl; G Villacampa; V Vladimirova; A Schneeweiss; T Karn; D-M Zahm; A Herencia-Ropero; P Jank; M van Mackelenbergh; P A Fasching; F Marmé; E Stickeler; C Schem; R Dienstmann; S Florian; V Nekljudova; J Balmaña; E Hahnen; C Denkert; V Serra Journal: Ann Oncol Date: 2021-09-11 Impact factor: 32.976
Authors: Adrian P Wiegmans; Fares Al-Ejeh; Nicole Chee; Pei-Yi Yap; Julia J Gorski; Leonard Da Silva; Emma Bolderson; Georgia Chenevix-Trench; Robin Anderson; Peter T Simpson; Sunil R Lakhani; Kum Kum Khanna Journal: Oncotarget Date: 2014-05-30
Authors: C Cruz; M Castroviejo-Bermejo; S Gutiérrez-Enríquez; A Llop-Guevara; Y H Ibrahim; A Gris-Oliver; S Bonache; B Morancho; A Bruna; O M Rueda; Z Lai; U M Polanska; G N Jones; P Kristel; L de Bustos; M Guzman; O Rodríguez; J Grueso; G Montalban; G Caratú; F Mancuso; R Fasani; J Jiménez; W J Howat; B Dougherty; A Vivancos; P Nuciforo; X Serres-Créixams; I T Rubio; A Oaknin; E Cadogan; J C Barrett; C Caldas; J Baselga; C Saura; J Cortés; J Arribas; J Jonkers; O Díez; M J O'Connor; J Balmaña; V Serra Journal: Ann Oncol Date: 2018-05-01 Impact factor: 32.976