Aurora B inhibition induces hyper-polyploidy and loss of long-term proliferative potential in RB and p53 defective cells
Abstract Polyploidy is a common outcome of chemotherapies, but there is conflicting evidence as to whether polyploidy is an adverse, benign or even favourable outcome. We show Aurora B kinase inhibitors efficiently promote polyploidy in many cell types, resulting in the cell cycle exit in RB and p53...
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| Format: | Article |
| Language: | English |
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Nature Publishing Group
2025-01-01
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| Series: | Cell Death and Disease |
| Online Access: | https://doi.org/10.1038/s41419-024-07329-7 |
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| author | Shivam Vora Saptarshi Chatterjee Ariel Andrew Ramyashree Prasanna Kumar Martina Proctor Zhen Zeng Rituparna Bhatt Deborah Nazareth Madushan Fernando Mathew J. K. Jones Yaowu He John D. Hooper Nigel A. J. McMillan Jelena Urosevic Jamal Saeh Jon Travers Daniela Cimini Jing Chen Brian Gabrielli |
| author_facet | Shivam Vora Saptarshi Chatterjee Ariel Andrew Ramyashree Prasanna Kumar Martina Proctor Zhen Zeng Rituparna Bhatt Deborah Nazareth Madushan Fernando Mathew J. K. Jones Yaowu He John D. Hooper Nigel A. J. McMillan Jelena Urosevic Jamal Saeh Jon Travers Daniela Cimini Jing Chen Brian Gabrielli |
| author_sort | Shivam Vora |
| collection | DOAJ |
| description | Abstract Polyploidy is a common outcome of chemotherapies, but there is conflicting evidence as to whether polyploidy is an adverse, benign or even favourable outcome. We show Aurora B kinase inhibitors efficiently promote polyploidy in many cell types, resulting in the cell cycle exit in RB and p53 functional cells, but hyper-polyploidy in cells with loss of RB and p53 function. These hyper-polyploid cells (>8n DNA content) are viable but have lost long-term proliferative potential in vitro and fail to form tumours in vivo. Investigation of mitosis in these cells revealed high numbers of centrosomes that were capable of supporting functional mitotic spindle poles, but these failed to progress to anaphase/telophase structures even when AURKB inhibitor was removed after 2–3 days. However, when AURKB inhibitor was removed after 1 day and cells had failed a single cytokinesis to become tetraploid, they retained colony forming ability and long-term proliferative potential. Mathematical modelling of the potential for polyploid cells to produce viable daughter cells demonstrated that cells with >8n DNA and >4 functional spindle poles approach zero probability of a viable daughter, supporting our experimental observations. These findings demonstrate that tetraploidy is tolerated by tumour cells, but higher ploidy states are incompatible with long-term proliferative potential. Model for AURKBi driven hyper-polyploid cells formation and fate. Aurora B inhibitor (AURKBi) treatment of RB+p53 defective cells efficiently promotes failed cell division. One failed cell division produces three possible outcomes, continued proliferation of the tetraploid daughter, cell death, or if AURKBi is continued, high polyploid states. Once cell have failed cell division >twice and have >8n DNA content they will continue to undergo rounds of endomitosis even in the absence of AURKBi to either become viable hyper-polyploid or die. The hyper-polyploid cells have no long-term proliferative potential. |
| format | Article |
| id | doaj-art-4cd9fc9bb00a432f88e8885822f16094 |
| institution | Kabale University |
| issn | 2041-4889 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Cell Death and Disease |
| spelling | doaj-art-4cd9fc9bb00a432f88e8885822f160942025-01-12T12:41:47ZengNature Publishing GroupCell Death and Disease2041-48892025-01-0116111110.1038/s41419-024-07329-7Aurora B inhibition induces hyper-polyploidy and loss of long-term proliferative potential in RB and p53 defective cellsShivam Vora0Saptarshi Chatterjee1Ariel Andrew2Ramyashree Prasanna Kumar3Martina Proctor4Zhen Zeng5Rituparna Bhatt6Deborah Nazareth7Madushan Fernando8Mathew J. K. Jones9Yaowu He10John D. Hooper11Nigel A. J. McMillan12Jelena Urosevic13Jamal Saeh14Jon Travers15Daniela Cimini16Jing Chen17Brian Gabrielli18Mater Research Institute, The University of QueenslandDepartment of Biological Sciences and Fralin Life Sciences Institute, Virginia TechMater Research Institute, The University of QueenslandMater Research Institute, The University of QueenslandMater Research Institute, The University of QueenslandMater Research Institute, The University of QueenslandMater Research Institute, The University of QueenslandMater Research Institute, The University of QueenslandMater Research Institute, The University of QueenslandFrazer Institute, Faculty of Medicine, University of QueenslandMater Research Institute, The University of QueenslandMater Research Institute, The University of QueenslandMenzies Health Institute Queensland and School of Medical Science, Griffith UniversityResearch and Early Development, Oncology R&D, AstraZenecaResearch and Early Development, Oncology R&D, AstraZenecaResearch and Early Development, Oncology R&D, AstraZenecaDepartment of Biological Sciences and Fralin Life Sciences Institute, Virginia TechDepartment of Biological Sciences and Fralin Life Sciences Institute, Virginia TechMater Research Institute, The University of QueenslandAbstract Polyploidy is a common outcome of chemotherapies, but there is conflicting evidence as to whether polyploidy is an adverse, benign or even favourable outcome. We show Aurora B kinase inhibitors efficiently promote polyploidy in many cell types, resulting in the cell cycle exit in RB and p53 functional cells, but hyper-polyploidy in cells with loss of RB and p53 function. These hyper-polyploid cells (>8n DNA content) are viable but have lost long-term proliferative potential in vitro and fail to form tumours in vivo. Investigation of mitosis in these cells revealed high numbers of centrosomes that were capable of supporting functional mitotic spindle poles, but these failed to progress to anaphase/telophase structures even when AURKB inhibitor was removed after 2–3 days. However, when AURKB inhibitor was removed after 1 day and cells had failed a single cytokinesis to become tetraploid, they retained colony forming ability and long-term proliferative potential. Mathematical modelling of the potential for polyploid cells to produce viable daughter cells demonstrated that cells with >8n DNA and >4 functional spindle poles approach zero probability of a viable daughter, supporting our experimental observations. These findings demonstrate that tetraploidy is tolerated by tumour cells, but higher ploidy states are incompatible with long-term proliferative potential. Model for AURKBi driven hyper-polyploid cells formation and fate. Aurora B inhibitor (AURKBi) treatment of RB+p53 defective cells efficiently promotes failed cell division. One failed cell division produces three possible outcomes, continued proliferation of the tetraploid daughter, cell death, or if AURKBi is continued, high polyploid states. Once cell have failed cell division >twice and have >8n DNA content they will continue to undergo rounds of endomitosis even in the absence of AURKBi to either become viable hyper-polyploid or die. The hyper-polyploid cells have no long-term proliferative potential.https://doi.org/10.1038/s41419-024-07329-7 |
| spellingShingle | Shivam Vora Saptarshi Chatterjee Ariel Andrew Ramyashree Prasanna Kumar Martina Proctor Zhen Zeng Rituparna Bhatt Deborah Nazareth Madushan Fernando Mathew J. K. Jones Yaowu He John D. Hooper Nigel A. J. McMillan Jelena Urosevic Jamal Saeh Jon Travers Daniela Cimini Jing Chen Brian Gabrielli Aurora B inhibition induces hyper-polyploidy and loss of long-term proliferative potential in RB and p53 defective cells Cell Death and Disease |
| title | Aurora B inhibition induces hyper-polyploidy and loss of long-term proliferative potential in RB and p53 defective cells |
| title_full | Aurora B inhibition induces hyper-polyploidy and loss of long-term proliferative potential in RB and p53 defective cells |
| title_fullStr | Aurora B inhibition induces hyper-polyploidy and loss of long-term proliferative potential in RB and p53 defective cells |
| title_full_unstemmed | Aurora B inhibition induces hyper-polyploidy and loss of long-term proliferative potential in RB and p53 defective cells |
| title_short | Aurora B inhibition induces hyper-polyploidy and loss of long-term proliferative potential in RB and p53 defective cells |
| title_sort | aurora b inhibition induces hyper polyploidy and loss of long term proliferative potential in rb and p53 defective cells |
| url | https://doi.org/10.1038/s41419-024-07329-7 |
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