Title |
Mitotic Spindle Assembly and Genomic Stability in Breast Cancer Require PI3K-C2α Scaffolding Function
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Published in |
Cancer Cell, October 2017
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DOI | 10.1016/j.ccell.2017.09.002 |
Pubmed ID | |
Authors |
Federico Gulluni, Miriam Martini, Maria Chiara De Santis, Carlo Cosimo Campa, Alessandra Ghigo, Jean Piero Margaria, Elisa Ciraolo, Irene Franco, Ugo Ala, Laura Annaratone, Davide Disalvatore, Giovanni Bertalot, Giuseppe Viale, Anna Noatynska, Mara Compagno, Sara Sigismund, Filippo Montemurro, Marcus Thelen, Fan Fan, Patrick Meraldi, Caterina Marchiò, Salvatore Pece, Anna Sapino, Roberto Chiarle, Pier Paolo Di Fiore, Emilio Hirsch |
Abstract |
Proper organization of the mitotic spindle is key to genetic stability, but molecular components of inter-microtubule bridges that crosslink kinetochore fibers (K-fibers) are still largely unknown. Here we identify a kinase-independent function of class II phosphoinositide 3-OH kinase α (PI3K-C2α) acting as limiting scaffold protein organizing clathrin and TACC3 complex crosslinking K-fibers. Downregulation of PI3K-C2α causes spindle alterations, delayed anaphase onset, and aneuploidy, indicating that PI3K-C2α expression is required for genomic stability. Reduced abundance of PI3K-C2α in breast cancer models initially impairs tumor growth but later leads to the convergent evolution of fast-growing clones with mitotic checkpoint defects. As a consequence of altered spindle, loss of PI3K-C2α increases sensitivity to taxane-based therapy in pre-clinical models and in neoadjuvant settings. |
X Demographics
Geographical breakdown
Country | Count | As % |
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Saudi Arabia | 3 | 23% |
Italy | 3 | 23% |
United States | 2 | 15% |
United Kingdom | 1 | 8% |
Unknown | 4 | 31% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 11 | 85% |
Scientists | 1 | 8% |
Practitioners (doctors, other healthcare professionals) | 1 | 8% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 103 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 19 | 18% |
Researcher | 15 | 15% |
Student > Bachelor | 9 | 9% |
Student > Master | 8 | 8% |
Student > Doctoral Student | 6 | 6% |
Other | 16 | 16% |
Unknown | 30 | 29% |
Readers by discipline | Count | As % |
---|---|---|
Biochemistry, Genetics and Molecular Biology | 30 | 29% |
Agricultural and Biological Sciences | 14 | 14% |
Medicine and Dentistry | 9 | 9% |
Immunology and Microbiology | 3 | 3% |
Neuroscience | 2 | 2% |
Other | 10 | 10% |
Unknown | 35 | 34% |