1
|
Moriuchi T, Hirose F. SUMOylation of RepoMan during late telophase regulates dephosphorylation of lamin A. J Cell Sci 2021; 134:271831. [PMID: 34387316 PMCID: PMC8445599 DOI: 10.1242/jcs.247171] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 07/23/2021] [Indexed: 11/20/2022] Open
Abstract
Dephosphorylation of lamin A, which triggers nuclear lamina reconstitution, is crucial for the completion of mitosis. However, the specific phosphatase and regulatory mechanism that allow timely lamin A dephosphorylation remain unclear. Here, we report that RepoMan (also known as CDCA2), a regulatory subunit of protein phosphatase 1γ (PP1γ) is transiently modified with SUMO-2 at K762 during late telophase. SUMOylation of RepoMan markedly enhanced its binding affinity with lamin A. Moreover, SUMOylated RepoMan contributes to lamin A recruitment to telophase chromosomes and dephosphorylation of the mitotic lamin A phosphorylation. Expression of a SUMO-2 mutant that has a defective interaction with the SUMO-interacting motif (SIM) resulted in failure of the lamin A and RepoMan association, along with abrogation of lamin A dephosphorylation and subsequent nuclear lamina formation. These findings strongly suggest that RepoMan recruits lamin A through SUMO–SIM interaction. Thus, transient SUMOylation of RepoMan plays an important role in the spatiotemporal regulation of lamin A dephosphorylation and the subsequent nuclear lamina formation at the end of mitosis. Summary: Transient SUMOylation of RepoMan controls the recruitment of lamin A to telophase chromosomes, lamin A dephosphorylation and nuclear lamina formation.
Collapse
Affiliation(s)
- Takanobu Moriuchi
- Graduate School of Life Science, University of Hyogo, 3-2-1 Koto, Kamigori, Hyogo, 678-1297, Japan
| | - Fumiko Hirose
- Graduate School of Life Science, University of Hyogo, 3-2-1 Koto, Kamigori, Hyogo, 678-1297, Japan
| |
Collapse
|
2
|
Henriques AC, Silva PMA, Sarmento B, Bousbaa H. Antagonizing the spindle assembly checkpoint silencing enhances paclitaxel and Navitoclax-mediated apoptosis with distinct mechanistic. Sci Rep 2021; 11:4139. [PMID: 33603057 PMCID: PMC7893169 DOI: 10.1038/s41598-021-83743-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 02/08/2021] [Indexed: 12/16/2022] Open
Abstract
Antimitotic drugs arrest cells in mitosis through chronic activation of the spindle assembly checkpoint (SAC), leading to cell death. However, drug-treated cancer cells can escape death by undergoing mitotic slippage, due to premature mitotic exit. Therefore, overcoming slippage issue is a promising chemotherapeutic strategy to improve the effectiveness of antimitotics. Here, we antagonized SAC silencing by knocking down the MAD2-binding protein p31comet, to delay mitotic slippage, and tracked cancer cells treated with the antimitotic drug paclitaxel, over 3 days live-cell time-lapse analysis. We found that in the absence of p31comet, the duration of mitotic block was increased in cells challenged with nanomolar concentrations of paclitaxel, leading to an additive effects in terms of cell death which was predominantly anticipated during the first mitosis. As accumulation of an apoptotic signal was suggested to prevent mitotic slippage, when we challenged p31comet-depleted mitotic-arrested cells with the apoptosis potentiator Navitoclax (previously called ABT-263), cell fate was shifted to accelerated post-mitotic death. We conclude that inhibition of SAC silencing is critical for enhancing the lethality of antimitotic drugs as well as that of therapeutic apoptosis-inducing small molecules, with distinct mechanisms. The study highlights the potential of p31comet as a target for antimitotic therapies.
Collapse
Affiliation(s)
- Ana C Henriques
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde, Rua Central da Gandra 1317, Gandra, 4585-116, Paredes, Portugal.,INEB, Instituto Nacional de Engenharia Biomédica, Universidade Do Porto, Porto, Portugal.,Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade Do Porto, Porto, Portugal
| | - Patrícia M A Silva
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde, Rua Central da Gandra 1317, Gandra, 4585-116, Paredes, Portugal
| | - Bruno Sarmento
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde, Rua Central da Gandra 1317, Gandra, 4585-116, Paredes, Portugal.,INEB, Instituto Nacional de Engenharia Biomédica, Universidade Do Porto, Porto, Portugal.,i3S-Instituto de Investigação e Inovação Em Saúde, Universidade Do Porto, Porto, Portugal
| | - Hassan Bousbaa
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde, Rua Central da Gandra 1317, Gandra, 4585-116, Paredes, Portugal. .,Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade Do Porto, Porto, Portugal.
| |
Collapse
|
3
|
Curtis NL, Ruda GF, Brennan P, Bolanos-Garcia VM. Deregulation of Chromosome Segregation and Cancer. ANNUAL REVIEW OF CANCER BIOLOGY 2020. [DOI: 10.1146/annurev-cancerbio-030419-033541] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The mitotic spindle assembly checkpoint (SAC) is an intricate cell signaling system that ensures the high fidelity and timely segregation of chromosomes during cell division. Mistakes in this process can lead to the loss, gain, or rearrangement of the genetic material. Gross chromosomal aberrations are usually lethal but can cause birth and development defects as well as cancer. Despite advances in the identification of SAC protein components, important details of the interactions underpinning chromosome segregation regulation remain to be established. This review discusses the current understanding of the function, structure, mode of regulation, and dynamics of the assembly and disassembly of SAC subcomplexes, which ultimately safeguard the accurate transmission of a stable genome to descendants. We also discuss how diverse oncoviruses take control of human cell division by exploiting the SAC and the potential of this signaling circuitry as a pool of drug targets to develop effective cancer therapies.
Collapse
Affiliation(s)
- Natalie L. Curtis
- Department of Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, United Kingdom
| | - Gian Filippo Ruda
- Target Discovery Institute and Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7BN, United Kingdom
| | - Paul Brennan
- Target Discovery Institute and Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7BN, United Kingdom
| | - Victor M. Bolanos-Garcia
- Department of Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, United Kingdom
| |
Collapse
|
4
|
Henriques AC, Ribeiro D, Pedrosa J, Sarmento B, Silva PMA, Bousbaa H. Mitosis inhibitors in anticancer therapy: When blocking the exit becomes a solution. Cancer Lett 2018; 440-441:64-81. [PMID: 30312726 DOI: 10.1016/j.canlet.2018.10.005] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 09/12/2018] [Accepted: 10/02/2018] [Indexed: 12/11/2022]
Abstract
Current microtubule-targeting agents (MTAs) remain amongst the most important antimitotic drugs used against a broad range of malignancies. By perturbing spindle assembly, MTAs activate the spindle assembly checkpoint (SAC), which induces mitotic arrest and subsequent apoptosis. However, besides toxic side effects and resistance, mitotic slippage and failure in triggering apoptosis in various cancer cells are limiting factors of MTAs efficacy. Alternative strategies to target mitosis without affecting microtubules have, thus, led to the identification of small molecules, such as those that target spindle Kinesins, Aurora and Polo-like kinases. Unfortunately, these so-called second-generation of antimitotics, encompassing mitotic blockers and mitotic drivers, have failed in clinical trials. Our recent understanding regarding the mechanisms of cell death during a mitotic arrest pointed out apoptosis as the main variable, providing an opportunity to control the cell fates and influence the effectiveness of antimitotics. Here, we provide an overview on the second-generation of antimitotics, and discuss possible strategies that exploit SAC activity, mitotic slippage/exit and apoptosis induction, in order to improve the efficacy of anticancer strategies that target mitosis.
Collapse
Affiliation(s)
- Ana C Henriques
- CESPU, Instituto de Investigação e Formação Avançada Em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde, Gandra PRD, Portugal; INEB, Instituto Nacional de Engenharia Biomédica, Universidade Do Porto, Porto, Portugal
| | - Diana Ribeiro
- CESPU, Instituto de Investigação e Formação Avançada Em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde, Gandra PRD, Portugal; Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade Do Porto, Porto, Portugal
| | - Joel Pedrosa
- CESPU, Instituto de Investigação e Formação Avançada Em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde, Gandra PRD, Portugal
| | - Bruno Sarmento
- CESPU, Instituto de Investigação e Formação Avançada Em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde, Gandra PRD, Portugal; INEB, Instituto Nacional de Engenharia Biomédica, Universidade Do Porto, Porto, Portugal; i3S - Instituto de Investigação e Inovação Em Saúde, Universidade Do Porto, Porto, Portugal
| | - Patrícia M A Silva
- CESPU, Instituto de Investigação e Formação Avançada Em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde, Gandra PRD, Portugal
| | - Hassan Bousbaa
- CESPU, Instituto de Investigação e Formação Avançada Em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde, Gandra PRD, Portugal; Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade Do Porto, Porto, Portugal.
| |
Collapse
|
5
|
Cervone N, Monica RD, Serpico AF, Vetrei C, Scaraglio M, Visconti R, Grieco D. Evidence that PP2A activity is dispensable for spindle assembly checkpoint-dependent control of Cdk1. Oncotarget 2018; 9:7312-7321. [PMID: 29484112 PMCID: PMC5800904 DOI: 10.18632/oncotarget.23329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 12/08/2017] [Indexed: 11/25/2022] Open
Abstract
Progression through mitosis, the cell cycle phase deputed to segregate replicated chromosomes, is granted by a protein phosphorylation wave that follows an activation-inactivation cycle of cyclin B-dependent kinase (Cdk) 1, the major mitosis-promoting enzyme. To ensure correct chromosome segregation, the safeguard mechanism spindle assembly checkpoint (SAC) delays Cdk1 inactivation by preventing cyclin B degradation until mitotic spindle assembly. At the end of mitosis, reversal of bulk mitotic protein phosphorylation, downstream Cdk1 inactivation, is required to complete mitosis and crucially relies on the activity of major protein phosphatases like PP2A. A role for PP2A, however, has also been suggested in spindle assembly and SAC-dependent control of Cdk1. Indeed, PP2A was found in complex with SAC proteins while small interfering RNAs (siRNAs)-mediated downregulation of PP2A holoenzyme components affected mitosis completion in mammalian cells. However, whether the SAC-dependent control of Cdk1 required the catalytic activity of PP2A has never been directly assessed. Here, using two PP2A inhibitors, okadaic acid and LB-100, we provide evidence that PP2A activity is dispensable for SAC control of Cdk1 in human cells.
Collapse
Affiliation(s)
- Nando Cervone
- CEINGE Biotecnologie Avanzate, 80145 Naples, Italy
- DMMBM, University of Naples “Federico II”, 80131 Naples, Italy
| | - Rosa Della Monica
- CEINGE Biotecnologie Avanzate, 80145 Naples, Italy
- DMMBM, University of Naples “Federico II”, 80131 Naples, Italy
| | - Angela Flavia Serpico
- CEINGE Biotecnologie Avanzate, 80145 Naples, Italy
- DMMBM, University of Naples “Federico II”, 80131 Naples, Italy
| | - Cinzia Vetrei
- CEINGE Biotecnologie Avanzate, 80145 Naples, Italy
- DMMBM, University of Naples “Federico II”, 80131 Naples, Italy
| | - Mario Scaraglio
- CEINGE Biotecnologie Avanzate, 80145 Naples, Italy
- DMMBM, University of Naples “Federico II”, 80131 Naples, Italy
| | | | - Domenico Grieco
- CEINGE Biotecnologie Avanzate, 80145 Naples, Italy
- DMMBM, University of Naples “Federico II”, 80131 Naples, Italy
| |
Collapse
|