
Our Focus
My group studies human breast cancer development and progression, as well as therapy response and resistance, in genetically engineered murine models (GEMMs) and patient-derived tumour xenograft (PDX) models. We have developed models for BRCA1/2-associated breast cancer, invasive lobular carcinoma (ILC), ductal carcinoma in situ (DCIS) and oestrogen receptor (ER) positive breast cancer. These models are used to (1) study tumour cell-intrinsic and -extrinsic mechanisms of breast cancer development and progression; (2) develop novel therapeutic strategies for prevention and treatment of breast tumours; (3) study mechanisms of acquired resistance to targeted therapeutics.
About Jos Jonkers

Jos Jonkers
My Research
Jos Jonkers performed his PhD research (on retroviral insertional mutagenesis screens to identify oncogenes involved in lymphoma progression) in the group of Anton Berns at the NKI. In 1996 he became a postdoc in the Berns lab, where he developed GEMMs of BRCA1/2-associated breast cancer. In 2002, he joined the lab of Allan Bradley at the Wellcome Trust Sanger Institute to develop platforms for DNA copy number analysis of mouse tumors. He became a junior group leader at the NKI in 2003; was appointed as permanent staff member in 2008; and became Head of the Division of Molecular Pathology in 2012.
Major breakthroughs were:
development of GEMMs of ILC and BRCA1/2-associated breast cancer
identification of multiple mechanisms of therapy resistance in BRCA1-deficient breast cancer
development of functional assays for classification of BRCA1 variants of unknown clinical significance
development of CRISPR/Cas9-based non-germline GEMMs of breast cancer
Awards
2018: Awarded the Stand Up To Cancer (SU2C) Laura Ziskin Prize In Translational Cancer Research
2017: Awarded Cancer Research UK (CRUK) Grand Challenge grant
2014: NWO VICI grant
2013: ERC Synergy Grant
2012: EMBO membership
2002: NWO Genomics Fellowship
2002: NWO VIDI grant
Key Publications
Annunziato, S., Kas, S. M., Nethe, M., Yücel, H., Del Bravo, J., Pritchard, C., ... & Schut, E. (2016). Modeling invasive lobular breast carcinoma by CRISPR/Cas9-mediated somatic genome editing of the mammary gland. Genes & development, 30(12), 1470-1480.
Bouwman, P., Aly, A., Escandell, J. M., Pieterse, M., Bartkova, J., van der Gulden, H., ... & Haffty, B. G. (2010). 53BP1 loss rescues BRCA1 deficiency and is associated with triple-negative and BRCA-mutated breast cancers. Nature Structural and Molecular Biology, 17(6), 688.
Bouwman, P., van der Gulden, H., van der Heijden, I., Drost, R., Klijn, C. N., Prasetyanti, P., ... & Jonkers, J. (2013). A high-throughput functional complementation assay for classification of BRCA1 missense variants. Cancer discovery, 3(10), 1142-1155.
Drost, R., Bouwman, P., Rottenberg, S., Boon, U., Schut, E., Klarenbeek, S., ... & Pieterse, M. (2011). BRCA1 RING function is essential for tumor suppression but dispensable for therapy resistance. Cancer cell, 20(6), 797-809.
Jaspers, J. E., Kersbergen, A., Boon, U., Sol, W., van Deemter, L., Zander, S. A., ... & Doroshow, J. H. (2013). Loss of 53BP1 causes PARP inhibitor resistance in Brca1-mutated mouse mammary tumors. Cancer discovery, 3(1), 68-81.
Kas, S. M., de Ruiter, J. R., Schipper, K., Annunziato, S., Schut, E., Klarenbeek, S., ... & Adams, D. J. (2017). Insertional mutagenesis identifies drivers of a novel oncogenic pathway in invasive lobular breast carcinoma. Nature genetics, 49(8), 1219.
Members
Jos Jonkers Division Head, Division Moleculalr Pathology | Ana Moises da Silva PhD student | Anna Khalizieva Phd student |
Anne Paulien Drenth Technician | Catrin Lutz PhD | Eline van der Burg Technician |
Ellen Wientjens Technician | Hanneke van der Gulden Technician | Ingrid van der Heijden Technician |
Julia Houthuijzen Postdoc fellow | Julia Yemelyanenko Lyalenko PhD Student | Julia-Star Darnold Onderzoeker in Opleiding |
Kaylee Keller Postdoc fellow | Konstantina Strepi Phd student | Sarah Moser PhD student |
Sophie Horst Msc | Stefan Hutten PhD student | |