1
|
Rowland RJ, Korolchuk S, Salamina M, Tatum NJ, Ault JR, Hart S, Turkenburg JP, Blaza JN, Noble MEM, Endicott JA. Cryo-EM structure of the CDK2-cyclin A-CDC25A complex. Nat Commun 2024; 15:6807. [PMID: 39122719 PMCID: PMC11316097 DOI: 10.1038/s41467-024-51135-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 07/22/2024] [Indexed: 08/12/2024] Open
Abstract
The cell division cycle 25 phosphatases CDC25A, B and C regulate cell cycle transitions by dephosphorylating residues in the conserved glycine-rich loop of CDKs to activate their activity. Here, we present the cryo-EM structure of CDK2-cyclin A in complex with CDC25A at 2.7 Å resolution, providing a detailed structural analysis of the overall complex architecture and key protein-protein interactions that underpin this 86 kDa complex. We further identify a CDC25A C-terminal helix that is critical for complex formation. Sequence conservation analysis suggests CDK1/2-cyclin A, CDK1-cyclin B and CDK2/3-cyclin E are suitable binding partners for CDC25A, whilst CDK4/6-cyclin D complexes appear unlikely substrates. A comparative structural analysis of CDK-containing complexes also confirms the functional importance of the conserved CDK1/2 GDSEID motif. This structure improves our understanding of the roles of CDC25 phosphatases in CDK regulation and may inform the development of CDC25-targeting anticancer strategies.
Collapse
Affiliation(s)
- Rhianna J Rowland
- Translational and Clinical Research Institute, Newcastle University Centre for Cancer, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK
| | - Svitlana Korolchuk
- Translational and Clinical Research Institute, Newcastle University Centre for Cancer, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK
- Fujifilm, Belasis Ave, Stockton-on-Tees, Billingham, TS23 1LH, UK
| | - Marco Salamina
- Translational and Clinical Research Institute, Newcastle University Centre for Cancer, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK
- Evotec (UK) Ltd., Milton, Abingdon, OX14 4RZ, UK
| | - Natalie J Tatum
- Translational and Clinical Research Institute, Newcastle University Centre for Cancer, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK
| | - James R Ault
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Sam Hart
- York Structural Biology Laboratory and York Biomedical Research Institute, Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Johan P Turkenburg
- York Structural Biology Laboratory and York Biomedical Research Institute, Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - James N Blaza
- York Structural Biology Laboratory and York Biomedical Research Institute, Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Martin E M Noble
- Translational and Clinical Research Institute, Newcastle University Centre for Cancer, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK.
| | - Jane A Endicott
- Translational and Clinical Research Institute, Newcastle University Centre for Cancer, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK.
| |
Collapse
|
2
|
Low ZY, Yip AJW, Chan AML, Choo WS. 14-3-3 Family of Proteins: Biological Implications, Molecular Interactions, and Potential Intervention in Cancer, Virus and Neurodegeneration Disorders. J Cell Biochem 2024; 125:e30624. [PMID: 38946063 DOI: 10.1002/jcb.30624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 06/11/2024] [Accepted: 06/17/2024] [Indexed: 07/02/2024]
Abstract
The 14-3-3 family of proteins are highly conserved acidic eukaryotic proteins (25-32 kDa) abundantly present in the body. Through numerous binding partners, the 14-3-3 is responsible for many essential cellular pathways, such as cell cycle regulation and gene transcription control. Hence, its dysregulation has been linked to the onset of critical illnesses such as cancers, neurodegenerative diseases and viral infections. Interestingly, explorative studies have revealed an inverse correlation of 14-3-3 protein in cancer and neurodegenerative diseases, and the direct manipulation of 14-3-3 by virus to enhance infection capacity has dramatically extended its significance. Of these, COVID-19 has been linked to the 14-3-3 proteins by the interference of the SARS-CoV-2 nucleocapsid (N) protein during virion assembly. Given its predisposition towards multiple essential host signalling pathways, it is vital to understand the holistic interactions between the 14-3-3 protein to unravel its potential therapeutic unit in the future. As such, the general structure and properties of the 14-3-3 family of proteins, as well as their known biological functions and implications in cancer, neurodegeneration, and viruses, were covered in this review. Furthermore, the potential therapeutic target of 14-3-3 proteins in the associated diseases was discussed.
Collapse
Affiliation(s)
- Zheng Yao Low
- School of Science, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia
| | - Ashley Jia Wen Yip
- School of Science, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia
| | - Alvin Man Lung Chan
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur, Malaysia
| | - Wee Sim Choo
- School of Science, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia
| |
Collapse
|
3
|
Pfisterer M, Robert R, Saul VV, Pritz A, Seibert M, Feederle R, Schmitz ML. The Aurora B-controlled PP1/RepoMan complex determines the spatial and temporal distribution of mitotic H2B S6 phosphorylation. Open Biol 2024; 14:230460. [PMID: 38806145 PMCID: PMC11293436 DOI: 10.1098/rsob.230460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/02/2024] [Accepted: 03/19/2024] [Indexed: 05/30/2024] Open
Abstract
The precise spatial and temporal control of histone phosphorylations is important for the ordered progression through the different phases of mitosis. The phosphorylation of H2B at S6 (H2B S6ph), which is crucial for chromosome segregation, reaches its maximum level during metaphase and is limited to the inner centromere. We discovered that the temporal and spatial regulation of this modification, as well as its intensity, are governed by the scaffold protein RepoMan and its associated catalytically active phosphatases, PP1α and PP1γ. Phosphatase activity is inhibited at the area of maximal H2B S6 phosphorylation at the inner centromere by site-specific Aurora B-mediated inactivation of the PP1/RepoMan complex. The motor protein Mklp2 contributes to the relocalization of Aurora B from chromatin to the mitotic spindle during anaphase, thus alleviating Aurora B-dependent repression of the PP1/RepoMan complex and enabling dephosphorylation of H2B S6. Accordingly, dysregulation of Mklp2 levels, as commonly observed in tumour cells, leads to the lack of H2B S6 dephosphorylation during early anaphase, which might contribute to chromosomal instability.
Collapse
Affiliation(s)
| | - Roman Robert
- Institute of Biochemistry, Justus-Liebig-University Giessen, Giessen, Germany
| | - Vera V. Saul
- Institute of Biochemistry, Justus-Liebig-University Giessen, Giessen, Germany
| | - Amelie Pritz
- Institute of Biochemistry, Justus-Liebig-University Giessen, Giessen, Germany
| | - Markus Seibert
- Institute of Biochemistry, Justus-Liebig-University Giessen, Giessen, Germany
| | - Regina Feederle
- Monoclonal Antibody Core Facility, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - M. Lienhard Schmitz
- Institute of Biochemistry, Justus-Liebig-University Giessen, Giessen, Germany
| |
Collapse
|
4
|
Yalaz C, Bridges E, Alham NK, Zois CE, Chen J, Bensaad K, Miar A, Pires E, Muschel RJ, McCullagh JSO, Harris AL. Cone photoreceptor phosphodiesterase PDE6H inhibition regulates cancer cell growth and metabolism, replicating the dark retina response. Cancer Metab 2024; 12:5. [PMID: 38350962 PMCID: PMC10863171 DOI: 10.1186/s40170-023-00326-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 11/24/2023] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND PDE6H encodes PDE6γ', the inhibitory subunit of the cGMP-specific phosphodiesterase 6 in cone photoreceptors. Inhibition of PDE6, which has been widely studied for its role in light transduction, increases cGMP levels. The purpose of this study is to characterise the role of PDE6H in cancer cell growth. METHODS From an siRNA screen for 487 genes involved in metabolism, PDE6H was identified as a controller of cell cycle progression in HCT116 cells. Role of PDE6H in cancer cell growth and metabolism was studied through the effects of its depletion on levels of cell cycle controllers, mTOR effectors, metabolite levels, and metabolic energy assays. Effect of PDE6H deletion on tumour growth was also studied in a xenograft model. RESULTS PDE6H knockout resulted in an increase of intracellular cGMP levels, as well as changes to the levels of nucleotides and key energy metabolism intermediates. PDE6H knockdown induced G1 cell cycle arrest and cell death and reduced mTORC1 signalling in cancer cell lines. Both knockdown and knockout of PDE6H resulted in the suppression of mitochondrial function. HCT116 xenografts revealed that PDE6H deletion, as well as treatment with the PDE5/6 inhibitor sildenafil, slowed down tumour growth and improved survival, while sildenafil treatment did not have an additive effect on slowing the growth of PDE6γ'-deficient tumours. CONCLUSIONS Our results indicate that the changes in cGMP and purine pools, as well as mitochondrial function which is observed upon PDE6γ' depletion, are independent of the PKG pathway. We show that in HCT116, PDE6H deletion replicates many effects of the dark retina response and identify PDE6H as a new target in preventing cancer cell proliferation and tumour growth.
Collapse
Affiliation(s)
- Ceren Yalaz
- Molecular Oncology Laboratories, Department of Medical Oncology, John Radcliffe Hospital, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, OX3 9DS, UK.
| | - Esther Bridges
- Molecular Oncology Laboratories, Department of Medical Oncology, John Radcliffe Hospital, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Nasullah K Alham
- Department of Engineering Science, Institute of Biomedical Engineering (IBME), University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
| | - Christos E Zois
- Molecular Oncology Laboratories, Department of Medical Oncology, John Radcliffe Hospital, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Jianzhou Chen
- Department of Oncology, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
| | - Karim Bensaad
- Molecular Oncology Laboratories, Department of Medical Oncology, John Radcliffe Hospital, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Ana Miar
- Department of Oncology, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
| | - Elisabete Pires
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Ruth J Muschel
- Department of Oncology, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
| | - James S O McCullagh
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Adrian L Harris
- Molecular Oncology Laboratories, Department of Medical Oncology, John Radcliffe Hospital, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, OX3 9DS, UK
| |
Collapse
|
5
|
Min Y, Park HB, Baek KH, Hwang S. Cellular Functions of Deubiquitinating Enzymes in Ovarian Adenocarcinoma. Genes (Basel) 2023; 14:genes14040886. [PMID: 37107644 PMCID: PMC10137459 DOI: 10.3390/genes14040886] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/02/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
In ovarian cancer patients, the 5-year survival rate is 90% for stages I and II, but only 30% for stages III and IV. Unfortunately, as 75% of the patients are diagnosed at stages III and IV, many experience a recurrence. To ameliorate this, it is necessary to develop new biomarkers for early diagnosis and treatment. The ubiquitin-proteasome system is a post-translational modification that plays an important role in regulating protein stability through ubiquitination. In particular, deubiquitinating enzymes (DUBs) regulate protein stability through deubiquitinating substrate proteins. In this review, DUBs and substrates regulated by these enzymes are summarized based on their functions in ovarian cancer cells. This would be useful for the discovery of biomarkers for ovarian cancer and developing new therapeutic candidates.
Collapse
Affiliation(s)
- Yosuk Min
- Department of Biomedical Science, CHA University, Seongnam 13488, Gyeonggi-do, Republic of Korea
| | - Hong-Beom Park
- Department of Biomedical Science, CHA University, Seongnam 13488, Gyeonggi-do, Republic of Korea
| | - Kwang-Hyun Baek
- Department of Biomedical Science, CHA University, Seongnam 13488, Gyeonggi-do, Republic of Korea
| | - Sohyun Hwang
- Department of Pathology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam 13496, Gyeonggi-do, Republic of Korea
- CHA Future Medicine Research Institute, CHA Bundang Medical Center, Seongnam 13496, Gyeonggi-do, Republic of Korea
| |
Collapse
|
6
|
Alsohaibani R, Claudel AL, Perchat-Varlet R, Boutserin S, Talfournier F, Boschi-Muller S, Selles B. Rhodanese-Fold Containing Proteins in Humans: Not Just Key Players in Sulfur Trafficking. Antioxidants (Basel) 2023; 12:antiox12040843. [PMID: 37107218 PMCID: PMC10135228 DOI: 10.3390/antiox12040843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/21/2023] [Accepted: 03/28/2023] [Indexed: 04/03/2023] Open
Abstract
The Rhodanese-fold is a ubiquitous structural domain present in various protein subfamilies associated with different physiological functions or pathophysiological conditions in humans. Proteins harboring a Rhodanese domain are diverse in terms of domain architecture, with some representatives exhibiting one or several Rhodanese domains, fused or not to other structural domains. The most famous Rhodanese domains are catalytically active, thanks to an active-site loop containing an essential cysteine residue which allows for catalyzing sulfur transfer reactions involved in sulfur trafficking, hydrogen sulfide metabolism, biosynthesis of molybdenum cofactor, thio-modification of tRNAs or protein urmylation. In addition, they also catalyse phosphatase reactions linked to cell cycle regulation, and recent advances proposed a new role into tRNA hydroxylation, illustrating the catalytic versatility of Rhodanese domain. To date, no exhaustive analysis of Rhodanese containing protein equipment from humans is available. In this review, we focus on structural and biochemical properties of human-active Rhodanese-containing proteins, in order to provide a picture of their established or putative key roles in many essential biological functions.
Collapse
|
7
|
Li N, Cai Y, Zou M, Zhou J, Zhang L, Zhou L, Xiang W, Cui Y, Li H. CFIm-mediated alternative polyadenylation safeguards the development of mammalian pre-implantation embryos. Stem Cell Reports 2022; 18:81-96. [PMID: 36563685 PMCID: PMC9860127 DOI: 10.1016/j.stemcr.2022.11.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 11/16/2022] [Accepted: 11/19/2022] [Indexed: 12/24/2022] Open
Abstract
Alternative polyadenylation (APA) gives rise to transcripts with distinct 3' untranslated regions (3' UTRs), thereby affecting the fate of mRNAs. APA is strongly associated with cell proliferation and differentiation status, and thus likely plays a critical role in the embryo development. However, the pattern of APA in mammalian early embryos is still unknown. Here, we analyzed the 3' UTR lengths in human and mouse pre-implantation embryos using available single cell RNA-seq datasets and explored the underlying mechanism driving the changes. Although human and mouse early embryos displayed distinct patterns of 3' UTR changing, RNA metabolism pathways were involved in both species. The 3' UTR lengths are likely determined by the abundance of the cleavage factor I complex (CFIm) components NUDT21 and CPSF6 in the nucleus. Importantly, depletion of either component resulted in early embryo development arrest and 3' UTR shortening. Collectively, these data highlight an essential role for APA in the development of mammalian early embryos.
Collapse
Affiliation(s)
- Na Li
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Ying Cai
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Min Zou
- Wuhan Tongji Reproductive Medicine Hospital, Wuhan 430013, China
| | - Jian Zhou
- Wuhan Jianwen Biological Technology Co. LTD, Wuhan 430205, China
| | - Ling Zhang
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Liquan Zhou
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Wenpei Xiang
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
| | - Yan Cui
- International Center for Aging and Cancer, Hainan Medical University, Haikou 571199, China.
| | - Huaibiao Li
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
| |
Collapse
|
8
|
Yam CQX, Lim HH, Surana U. DNA damage checkpoint execution and the rules of its disengagement. Front Cell Dev Biol 2022; 10:1020643. [PMID: 36274841 PMCID: PMC9582513 DOI: 10.3389/fcell.2022.1020643] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 09/21/2022] [Indexed: 11/13/2022] Open
Abstract
Chromosomes are susceptible to damage during their duplication and segregation or when exposed to genotoxic stresses. Left uncorrected, these lesions can result in genomic instability, leading to cells' diminished fitness, unbridled proliferation or death. To prevent such fates, checkpoint controls transiently halt cell cycle progression to allow time for the implementation of corrective measures. Prominent among these is the DNA damage checkpoint which operates at G2/M transition to ensure that cells with damaged chromosomes do not enter the mitotic phase. The execution and maintenance of cell cycle arrest are essential aspects of G2/M checkpoint and have been studied in detail. Equally critical is cells' ability to switch-off the checkpoint controls after a successful completion of corrective actions and to recommence cell cycle progression. Interestingly, when corrective measures fail, cells can mount an unusual cellular response, termed adaptation, where they escape checkpoint arrest and resume cell cycle progression with damaged chromosomes at the cost of genome instability or even death. Here, we discuss the DNA damage checkpoint, the mitotic networks it inhibits to prevent segregation of damaged chromosomes and the strategies cells employ to quench the checkpoint controls to override the G2/M arrest.
Collapse
Affiliation(s)
| | - Hong Hwa Lim
- A*STAR Singapore Immunology Network, Singapore, Singapore
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Uttam Surana
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Department of Pharmacology, National University of Singapore, Singapore, Singapore
| |
Collapse
|
9
|
Guo YQ, Wang Q, Wang JG, Gu YJ, Song PP, Wang SY, Qian XY, Gao X. METTL3 modulates m6A modification of CDC25B and promotes head and neck squamous cell carcinoma malignant progression. Exp Hematol Oncol 2022; 11:14. [PMID: 35287752 PMCID: PMC8919647 DOI: 10.1186/s40164-022-00256-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 01/13/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND N6-methyladenosine (m6A) RNA methylation and its methyltransferase METTL3 have been widely reported to be involved in different cancers by regulating RNA metabolism and function. Here, we aimed to explore the biological function and clinical significance of m6A modification and METTL3 in head and neck squamous cell carcinoma (HNSCC). METHODS The prognostic value of METTL3 expression was evaluated using tissue microarray and immunohistochemical staining analyses in a human HNSCC cohort. The biological role and mechanism of METTL3 in HNSCC tumour growth, metastasis and angiogenesis were determined in vitro and in vivo. RESULTS M6A levels and METTL3 expressions in HNSCC tissues were significantly increased compared with paired adjacent tissues. Meanwhile, METTL3 was an independent risk factor for the prognosis of HNSCC patients. Moreover, METTL3 overexpression promoted HNSCC cell proliferation, migration, invasion, and angiogenesis, while knockdown of METTL3 had an opposite effect in vivo and in vitro. Mechanistically, METTL3 enhanced the m6A modification of CDC25B mRNA, which maintained its stability and upregulated its expression, thereby activating G2/M phase of cell cycle and leading to HNSCC malignant progression. CONCLUSIONS METTL3 may be a potential prognostic biomarker and therapeutic target for HNSCC.
Collapse
Affiliation(s)
- Yu-Qing Guo
- Medical School of Nanjing University, Nanjing, 210093, Jiangsu, China
| | - Qiang Wang
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China
| | - Jun-Guo Wang
- Department of Otolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Jiangsu Provincial Key Medical Discipline (Laboratory), Nanjing, 210008, China
- Research Institute of Otolaryngology, Nanjing, 210008, China
| | - Ya-Jun Gu
- Department of Otolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Jiangsu Provincial Key Medical Discipline (Laboratory), Nanjing, 210008, China
- Research Institute of Otolaryngology, Nanjing, 210008, China
| | - Pan-Pan Song
- Department of Otolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Jiangsu Provincial Key Medical Discipline (Laboratory), Nanjing, 210008, China
- Research Institute of Otolaryngology, Nanjing, 210008, China
| | - Shou-Yu Wang
- Medical School of Nanjing University, Nanjing, 210093, Jiangsu, China.
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China.
- Jiangsu Key Laboratory of Molecular Medicine, Medical School of Nanjing University, Nanjing, 210093, China.
| | - Xiao-Yun Qian
- Medical School of Nanjing University, Nanjing, 210093, Jiangsu, China.
- Department of Otolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Jiangsu Provincial Key Medical Discipline (Laboratory), Nanjing, 210008, China.
- Research Institute of Otolaryngology, Nanjing, 210008, China.
- Department of Otolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, No.321 Zhongshan Road, Nanjing, 210008, Jiangsu, China.
| | - Xia Gao
- Medical School of Nanjing University, Nanjing, 210093, Jiangsu, China.
- Department of Otolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Jiangsu Provincial Key Medical Discipline (Laboratory), Nanjing, 210008, China.
- Research Institute of Otolaryngology, Nanjing, 210008, China.
- Department of Otolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, No.321 Zhongshan Road, Nanjing, 210008, Jiangsu, China.
| |
Collapse
|
10
|
Ferencova I, Vaskovicova M, Drutovic D, Knoblochova L, Macurek L, Schultz RM, Solc P. CDC25B is required for the metaphase I-metaphase II transition in mouse oocytes. J Cell Sci 2022; 135:274615. [PMID: 35237831 DOI: 10.1242/jcs.252924] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 02/16/2022] [Indexed: 11/20/2022] Open
Abstract
Mammalian oocytes are arrested at meiotic prophase I. The dual-specificity phosphatase CDC25B is essential for cyclin-dependent kinase 1 (CDK1) activation that drives resumption of meiosis. CDC25B reverses the inhibitory effect of the protein kinases WEE1/MYT1 on CDK1 activation. Cdc25b-/- female mice are infertile because oocytes cannot activate CDK1. To identify a role for CDC25B following resumption of meiosis, we restored CDK1 activation in Cdc25b-/- oocytes by inhibiting WEE1/MYT1, or expressing EGFP-CDC25A or constitutively active EGFP-CDK1 from microinjected cRNAs. Forced CDK1 activation in Cdc25b-/- oocytes allowed resumption of meiosis, but oocytes mostly arrested at metaphase I (MI) with intact spindles. Similarly, ∼1/3 of Cdc25b+/- oocytes with reduced amount of CDC25B arrest in MI. MI arrested Cdc25b-/- oocytes also display a transient decrease in CDK1 activity similar to Cdc25b+/+ oocytes during the MI-MII transition, whereas Cdc25b+/- oocytes exhibit only a partial APC/C activation and anaphase I entry. Thus, CDC25B is necessary for resumption of meiosis and the MI-MII transition.
Collapse
Affiliation(s)
- Ivana Ferencova
- Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Libechov, Czech Republic.,Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Michaela Vaskovicova
- Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Libechov, Czech Republic
| | - David Drutovic
- Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Libechov, Czech Republic
| | - Lucie Knoblochova
- Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Libechov, Czech Republic
| | - Libor Macurek
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic
| | - Richard M Schultz
- Department of Biology, University of Pennsylvania, Philadelphia, PA, USA.,Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Petr Solc
- Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Libechov, Czech Republic
| |
Collapse
|
11
|
Abstract
The centrosome is a multifunctional organelle that is known primarily for its microtubule organising function. Centrosomal defects caused by changes in centrosomal structure or number have been associated with human diseases ranging from congenital defects to cancer. We are only beginning to appreciate how the non-microtubule organising roles of the centrosome are related to these clinical conditions. In this review, we will discuss the historical evidence that led to the proposal that the centrosome participates in cell cycle regulation. We then summarize the body of work that describes the involvement of the mammalian centrosome in triggering cell cycle progression and checkpoint signalling. Then we will highlight work from the fission yeast model organism, revealing the molecular details that explain how the spindle pole body (SPB, the yeast functional equivalent of the centrosome), participates in these cell cycle transitions. Importantly, we will discuss some of the emerging questions from recent discoveries related to the role of the centrosome as a cell cycle regulator.
Collapse
|
12
|
Ding L, Zhao X, Xiong Q, Jiang X, Liu X, Ding K, Zhou P. Cdc25B is transcriptionally inhibited by IER5 through the NF-YB transcription factor in irradiation-treated HeLa cells. Toxicol Res (Camb) 2021; 10:875-884. [PMID: 34484679 DOI: 10.1093/toxres/tfab069] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 05/28/2021] [Accepted: 07/05/2021] [Indexed: 12/09/2022] Open
Abstract
Cervical cancer (CC) is a type of pelvic malignant tumor that severely threatens women's health. Current evidence suggests that IER5, as a potential radiosensitizer, promotes irradiation-induced apoptosis in CC tissues in patients undergoing chemoradiotherapy. IER5 has been shown to be involved in the G2/M-phase transition. In the present study, we used Cdc25B as the breakthrough point to explore the underlying mechanism of IER5 in the cell cycle regulation of radiation-damaged HeLa cells. IER5 was evidently upregulated after irradiation, but Cdc25B was significantly downregulated. In monoclonal IER5-silenced HeLa cells, irradiation-induced downregulation of Cdc25B was attenuated. The effect of irradiation on Cdc25B promoter activity was determined by dual-luciferase reporter assays. The response elements on the Cdc25B promoter related to irradiation were predicted by JASPAR. These conserved sequences were mutated individually or in combination by splicing-by-overlap extension PCR, and their function was confirmed by dual-luciferase reporter assays. The enrichment efficiency of transcription factors after irradiation was determined by chromatin immunoprecipitation (ChIP) assay. Both Sp1/Sp3 and NF-YB binding sites were involved in irradiation-mediated regulation of Cdc25B. IER5 was involved in irradiation-mediated regulation of Cdc25B through the NF-YB binding site. Furthermore, ChIP assays showed that IER5 bound to the Cdc25B promoter, and the binding of IER5 to the Cdc25B promoter region in irradiation-induced HeLa cells induced the release of the coactivator p300 through interaction with NF-YB. Taken together, these findings indicate that IER5 is the transcriptional repressor that accelerates the downregulation of Cdc25B expression after irradiation.
Collapse
Affiliation(s)
- Lixin Ding
- National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Xicheng District, Beijing 100088, P. R. China
| | - Xianzhe Zhao
- National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Xicheng District, Beijing 100088, P. R. China
| | - Qiang Xiong
- National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Xicheng District, Beijing 100088, P. R. China
| | - Xiaoyan Jiang
- National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Xicheng District, Beijing 100088, P. R. China
| | - Xiaodan Liu
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| | - Kuke Ding
- National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Xicheng District, Beijing 100088, P. R. China
| | - Pingkun Zhou
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| |
Collapse
|
13
|
Roy S, Rangasamy L, Nouar A, Koenig C, Pierroz V, Kaeppeli S, Ferrari S, Patra M, Gasser G. Synthesis and Biological Evaluation of Metallocene-Tethered Peptidyl Inhibitors of CDC25. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saonli Roy
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Loganathan Rangasamy
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Assia Nouar
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Christiane Koenig
- Institute of Molecular Cancer Research, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Vanessa Pierroz
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
- Institute of Molecular Cancer Research, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Simon Kaeppeli
- Institute of Molecular Cancer Research, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Stefano Ferrari
- Institute of Molecular Cancer Research, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Malay Patra
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Laboratory of Medicinal Chemistry and Cell Biology, Homi Bhabha Road, Navy Nagar, 400005 Mumbai, India
| | - Gilles Gasser
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, F-75005 Paris, France
| |
Collapse
|
14
|
Design, synthesis, and functional evaluation of triazine-based bivalent agents that simultaneously target the active site and hot spot of phosphatase Cdc25B. Bioorg Med Chem Lett 2021; 48:128265. [PMID: 34273487 DOI: 10.1016/j.bmcl.2021.128265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 07/05/2021] [Accepted: 07/11/2021] [Indexed: 11/21/2022]
Abstract
Cdc25B phosphatase catalyzes the dephosphorylation and activation of cyclin-dependent kinases 2 (CDK2/CycA) and their overexpression has been reported in cancers. Although Cdc25B has received much attention as a drug target, its flat and featureless surface makes it challenging to develop new agents targeting this protein. In this study, we investigated the rational design of a series of bivalent triazine-based derivatives with the aim of simultaneously targeting the active site and the remote hotspot critical for the interaction with CDK2/CycA. Compounds 1e and 10, containing aromatic residues, were shown to inhibit Cdc25B activity selectively over Cdc25A at low micromolar concentration.
Collapse
|
15
|
In Silico Identification of Small Molecules as New Cdc25 Inhibitors through the Correlation between Chemosensitivity and Protein Expression Pattern. Int J Mol Sci 2021; 22:ijms22073714. [PMID: 33918281 PMCID: PMC8038176 DOI: 10.3390/ijms22073714] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 03/29/2021] [Accepted: 03/31/2021] [Indexed: 01/11/2023] Open
Abstract
The cell division cycle 25 (Cdc25) protein family plays a crucial role in controlling cell proliferation, making it an excellent target for cancer therapy. In this work, a set of small molecules were identified as Cdc25 modulators by applying a mixed ligand-structure-based approach and taking advantage of the correlation between the chemosensitivity of selected structures and the protein expression pattern of the proposed target. In the first step of the in silico protocol, a set of molecules acting as Cdc25 inhibitors were identified through a new ligand-based protocol and the evaluation of a large database of molecular structures. Subsequently, induced-fit docking (IFD) studies allowed us to further reduce the number of compounds biologically screened. In vitro antiproliferative and enzymatic inhibition assays on the selected compounds led to the identification of new structurally heterogeneous inhibitors of Cdc25 proteins. Among them, J3955, the most active inhibitor, showed concentration-dependent antiproliferative activity against HepG2 cells, with GI50 in the low micromolar range. When J3955 was tested in cell-cycle perturbation experiments, it caused mitotic failure by G2/M-phase cell-cycle arrest. Finally, Western blotting analysis showed an increment of phosphorylated Cdk1 levels in cells exposed to J3955, indicating its specific influence in cellular pathways involving Cdc25 proteins.
Collapse
|
16
|
Rajagopal P, Jayandharan GR, Krishnan UM. Evaluation of the Anticancer Activity of pH-Sensitive Polyketal Nanoparticles for Acute Myeloid Leukemia. Mol Pharm 2021; 18:2015-2031. [PMID: 33780253 DOI: 10.1021/acs.molpharmaceut.0c01243] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Polyketals are a class of acid-responsive polymers that have been relatively less explored for drug delivery applications compared to polyesters. The degradation of these polymers is accelerated in an acidic medium and does not result in acidic byproducts. Their biocompatibility depends on the diol used for the synthesis. The present work aims to synthesize, characterize, and fabricate nanospheres of an aliphatic polyketal for delivery of the nucleotide analogue cytarabine toward the treatment of acute myeloid leukemia (AML). The internalization mechanism of the nanospheres was probed, and its implication on the nuclear localization and escape from the endo-lysosomal compartments were studied. The drug-loaded polyketal nanoparticles reduced the cell viability to a greater extent compared with the free drug. The effect of the drug-loaded polyketal nanoparticles on the differential gene expression of leukemic cells was investigated for the first time to understand their therapeutic implications. It was found that treatment with drug-loaded polyketal nanoparticles downregulated AML-specific genes involved in cell proliferation and recurrence compared to the free drug. The protein expression studies were performed for selected genes obtained from gene expression analysis. Biodistribution studies showed that the poly(cyclohexane-1,4-diyl acetone dimethylene ketal) (PCADK) nanoparticles exhibit prolonged circulation time. Overall, our results suggest that polyketal-based delivery of cytarabine represents a more effective alternative strategy for AML therapy.
Collapse
Affiliation(s)
- Pratheppa Rajagopal
- Centre for Nanotechnology & Advanced Biomaterials, SASTRA Deemed University Thanjavur 613401, India.,School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, India
| | - Giridhara R Jayandharan
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur 208016, Uttar Pradesh, India.,The Mehta Family Centre for Engineering In Medicine, Indian Institute of Technology, Kanpur 208016, Uttar Pradesh, India
| | - Uma Maheswari Krishnan
- Centre for Nanotechnology & Advanced Biomaterials, SASTRA Deemed University Thanjavur 613401, India.,School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, India.,School of Arts, Science & Humanities, SASTRA Deemed University, Thanjavur 613401, India
| |
Collapse
|
17
|
Chen YC, Hsieh HH, Chang HC, Wang HC, Lin WJ, Lin JJ. CDC25B induces cellular senescence and correlates with tumor suppression in a p53-dependent manner. J Biol Chem 2021; 296:100564. [PMID: 33745968 PMCID: PMC8054198 DOI: 10.1016/j.jbc.2021.100564] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 03/10/2021] [Accepted: 03/17/2021] [Indexed: 01/13/2023] Open
Abstract
The phosphatase cell division cycle 25B (Cdc25B) regulates cell cycle progression. Increased Cdc25B levels are often detected in cancer cell lines and human cancers and have been implicated in contributing to tumor growth, potentially by providing cancer cells with the ability to bypass checkpoint controls. However, the specific mechanism by which increased Cdc25B impacts tumor progression is not clear. Here we analyzed The Cancer Genome Atlas (TCGA) database and found that patients with high CDC25B expression had the expected poor survival. However, we also found that high CDC25B expression had a p53-dependent tumor suppressive effect in lung cancer and possibly several other cancer types. Looking in more detail at the tumor suppressive function of Cdc25B, we found that increased Cdc25B expression caused inhibition of cell growth in human normal fibroblasts. This effect was not due to alteration of specific cell cycle stage or inhibition of apoptosis, nor by induction of the DNA damage response. Instead, increased CDC25B expression led cells into senescence. We also found that p53 was required to induce senescence, which might explain the p53-dependent tumor suppressive function of Cdc25B. Mechanistically, we found that the Cdc25B phosphatase activity was required to induce senescence. Further analysis also found that Cdc25B stabilized p53 through binding and dephosphorylating p53. Together, this study identified a tumor-suppressive function of Cdc25B that is mediated through a p53-dependent senescence pathway.
Collapse
Affiliation(s)
- Ying-Chieh Chen
- Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Hsi-Hsien Hsieh
- Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Hsi-Chi Chang
- Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Hsin-Chiao Wang
- Institute of Biochemistry and Molecular Biology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Wey-Jinq Lin
- Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei, Taiwan.
| | - Jing-Jer Lin
- Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei, Taiwan; Institute of Biochemistry and Molecular Biology, National Taiwan University College of Medicine, Taipei, Taiwan.
| |
Collapse
|
18
|
Diggins NL, Skalsky RL, Hancock MH. Regulation of Latency and Reactivation by Human Cytomegalovirus miRNAs. Pathogens 2021; 10:pathogens10020200. [PMID: 33668486 PMCID: PMC7918750 DOI: 10.3390/pathogens10020200] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/09/2021] [Accepted: 02/10/2021] [Indexed: 12/17/2022] Open
Abstract
Human cytomegalovirus (HCMV) encodes 22 mature microRNAs (miRNAs), which regulate a myriad of cellular processes, including vesicular trafficking, cell cycle progression, apoptosis, and immune evasion, as well as viral gene expression. Recent evidence points to a critical role for HCMV miRNAs in mediating latency in CD34+ hematopoietic progenitor cells through modulation of cellular signaling pathways, including attenuation of TGFβ and EGFR signaling. Moreover, HCMV miRNAs can act in concert with, or in opposition to, viral proteins in regulating host cell functions. Here, we comprehensively review the studies of HCMV miRNAs in the context of latency and highlight the novel processes that are manipulated by the virus using these small non-coding RNAs.
Collapse
|
19
|
Wei W, Mo X, Yan L, Huang M, Yang Y, Jin Q, Zhong H, Cao W, Wu K, Wu L, Li Z, Wang T, Qin Y, Chen J. Circular RNA Profiling Reveals That circRNA_104433 Regulates Cell Growth by Targeting miR-497-5p in Gastric Cancer. Cancer Manag Res 2020; 12:15-30. [PMID: 32021419 PMCID: PMC6954096 DOI: 10.2147/cmar.s219307] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 11/28/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND The role and mechanism of hsa_circRNA_104433 in gastric cancer (GC) are further elucidated. MATERIALS AND METHODS CircRNA_104433 was selected by circRNA microarrays and GEO database. qRT-PCR was used to analyze the expression of circRNA_104433 in GC. The role of circRNA_104433 in GC cells was evaluated based on cell cycle progression, cell proliferation, cell apoptosis, and tumor xenograft experiment assay. To explore the mechanisms of circRNA_104433 in GC TCGA database, STRING version, qRT-PCR and luciferase assay were performed. Furthermore, the prognostic value of CDC25A in GC was determined based on the GEO database. RESULTS The level of circRNA_104433 showed upregulation in GC tissues, and the expression of it showed a positive correlation with the degree of differentiation and the size of the tumor. Knockdown of circRNA_104433 inhibited cell cycle transition, and cell proliferation, while promoted cell apoptosis in GC. CircRNA_104433 directly binds to miR-497-5p, which directly regulates CDC25A. The median survival period of GC patients with high expression levels of CDC25A was 21.3 months, which was shorter than those with low group expression of CDC25A (35.9 months). The cell cycle proteins CDK1, CDK2, CCNB1, PKMYT1, CDC20, CHEK1 and CDC25A were coexpressed with CDC25A. CONCLUSION These findings suggested that knockdown of circRNA_104433 expression suppressed tumor development in GC.
Collapse
Affiliation(s)
- Weiyuan Wei
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Xianwei Mo
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Linhai Yan
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Mingwei Huang
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Yang Yang
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Qinwen Jin
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Huage Zhong
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Wenlong Cao
- Departments of Surgery, The First Affiliated Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Kun Wu
- Departments of Surgery, The First Affiliated Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Liucheng Wu
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Zhao Li
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Tingan Wang
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Yuzhou Qin
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| | - Jiansi Chen
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Guangxi Medical University, Nanning 530021, People's Republic of China
| |
Collapse
|
20
|
Crncec A, Hochegger H. Triggering mitosis. FEBS Lett 2019; 593:2868-2888. [PMID: 31602636 DOI: 10.1002/1873-3468.13635] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 10/07/2019] [Accepted: 10/07/2019] [Indexed: 12/28/2022]
Abstract
Entry into mitosis is triggered by the activation of cyclin-dependent kinase 1 (Cdk1). This simple reaction rapidly and irreversibly sets the cell up for division. Even though the core step in triggering mitosis is so simple, the regulation of this cellular switch is highly complex, involving a large number of interconnected signalling cascades. We do have a detailed knowledge of most of the components of this network, but only a poor understanding of how they work together to create a precise and robust system that ensures that mitosis is triggered at the right time and in an orderly fashion. In this review, we will give an overview of the literature that describes the Cdk1 activation network and then address questions relating to the systems biology of this switch. How is the timing of the trigger controlled? How is mitosis insulated from interphase? What determines the sequence of events, following the initial trigger of Cdk1 activation? Which elements ensure robustness in the timing and execution of the switch? How has this system been adapted to the high levels of replication stress in cancer cells?
Collapse
Affiliation(s)
- Adrijana Crncec
- Genome Damage and Stability Centre, University of Sussex, Brighton, UK
| | - Helfrid Hochegger
- Genome Damage and Stability Centre, University of Sussex, Brighton, UK
| |
Collapse
|
21
|
Xiao Y, Yu Y, Gao D, Jin W, Jiang P, Li Y, Wang C, Song Y, Zhan P, Gu F, Zhang C, Wang B, Chen Y, Du B, Zhang R. Inhibition of CDC25B With WG-391D Impedes the Tumorigenesis of Ovarian Cancer. Front Oncol 2019; 9:236. [PMID: 31024841 PMCID: PMC6463794 DOI: 10.3389/fonc.2019.00236] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Accepted: 03/15/2019] [Indexed: 12/26/2022] Open
Abstract
Novel inhibitors are urgently needed for use as targeted therapies to improve the overall survival (OS) of patients with ovarian cancer. Here, we show that cell division cycle 25B (CDC25B) is over-expressed in ovarian tumors and associated with poor patient prognosis. All previously reported CDC25B inhibitors have been identified by their ability to reversibly inhibit the catalytic dephosphorylation activity of CDC25B in vitro; however, none of these compounds have entered clinical trials for ovarian cancer therapy. In this study, we synthesized a novel small molecule compound, WG-391D, that potently down-regulates CDC25B expression without affecting its catalytic dephosphorylation activity. The inhibition of CDC25B by WG-391D is irreversible, and WG-391D should therefore exhibit potent antitumor activity against ovarian cancer. WG-391D induces cell cycle progression arrest at the G2/M phase. Half maximal inhibitory concentration (IC50) values of WG-391D for inhibition of the proliferation and migration of eight representative ovarian cancer cell lines (SKOV3, ES2, OVCAR8, OVTOKO, A2780, IGROV1, HO8910PM, and MCAS) and five primary ovarian tumor cell lines (GFY004, GFY005, CZ001, CZ006, and CZ008) were lower than 10 and 1 μM, respectively. WG-391D inhibited tumor growth in nude mice inoculated with SKOV3 cells or a patient-derived xenograft (PDX). The underlying mechanisms were associated with the down-regulation of CDC25B and subsequent inactivation of cell division cycle 2 (CDC2) and the serine/threonine kinase, AKT. In conclusion, this study demonstrates that WG-391D exhibits strong antitumor activity against ovarian cancer and indicates that the down-regulation of CDC25B by inhibitors could provide a rationale for ovarian cancer therapy.
Collapse
Affiliation(s)
- Yangjiong Xiao
- Department of Obstetrics and Gynecology, Shanghai Fengxian District Central Hospital of Southern Medical University, Shanghai, China.,Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, China
| | - Yang Yu
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, China
| | - Dan Gao
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, China
| | - Wangrui Jin
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, China
| | - Pengcheng Jiang
- Department of Gynecology, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Yuhong Li
- Department of Gynecology, The International Peace Maternity & Child Health Hospital, The China Welfare Institute, Shanghai Jiaotong University, Shanghai, China
| | - Chao Wang
- Department of Gynecology, The International Peace Maternity & Child Health Hospital, The China Welfare Institute, Shanghai Jiaotong University, Shanghai, China
| | - Yuning Song
- Department of Clinical Pharmacy, Qilu Hospital of Shandong University, Jinan, China
| | - Peng Zhan
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Fei Gu
- Department of Obstetrics and Gynecology, Shanghai Fengxian District Central Hospital of Southern Medical University, Shanghai, China
| | - Cancan Zhang
- Department of Obstetrics and Gynecology, Shanghai Fengxian District Central Hospital of Southern Medical University, Shanghai, China
| | - Bin Wang
- Department of Obstetrics and Gynecology, Shanghai Fengxian District Central Hospital of Southern Medical University, Shanghai, China
| | - Yihua Chen
- Department of Obstetrics and Gynecology, Shanghai Fengxian District Central Hospital of Southern Medical University, Shanghai, China.,Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, China
| | - Bing Du
- Department of Obstetrics and Gynecology, Shanghai Fengxian District Central Hospital of Southern Medical University, Shanghai, China.,Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, China
| | - Rong Zhang
- Department of Obstetrics and Gynecology, Shanghai Fengxian District Central Hospital of Southern Medical University, Shanghai, China
| |
Collapse
|
22
|
Moura M, Conde C. Phosphatases in Mitosis: Roles and Regulation. Biomolecules 2019; 9:E55. [PMID: 30736436 PMCID: PMC6406801 DOI: 10.3390/biom9020055] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/31/2019] [Accepted: 02/01/2019] [Indexed: 02/07/2023] Open
Abstract
Mitosis requires extensive rearrangement of cellular architecture and of subcellular structures so that replicated chromosomes can bind correctly to spindle microtubules and segregate towards opposite poles. This process originates two new daughter nuclei with equal genetic content and relies on highly-dynamic and tightly regulated phosphorylation of numerous cell cycle proteins. A burst in protein phosphorylation orchestrated by several conserved kinases occurs as cells go into and progress through mitosis. The opposing dephosphorylation events are catalyzed by a small set of protein phosphatases, whose importance for the accuracy of mitosis is becoming increasingly appreciated. This review will focus on the established and emerging roles of mitotic phosphatases, describe their structural and biochemical properties, and discuss recent advances in understanding the regulation of phosphatase activity and function.
Collapse
Affiliation(s)
- Margarida Moura
- IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal.
- i3S-Instituto de Investigação e Inovação em Saúde da Universidade do Porto, 4200-135, Porto, Portugal.
- Programa Doutoral em Biologia Molecular e Celular (MCbiology), Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, 4050-313 Porto, Portugal.
| | - Carlos Conde
- IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal.
- i3S-Instituto de Investigação e Inovação em Saúde da Universidade do Porto, 4200-135, Porto, Portugal.
| |
Collapse
|
23
|
Pharmacophore-guided discovery of CDC25 inhibitors causing cell cycle arrest and tumor regression. Sci Rep 2019; 9:1335. [PMID: 30718768 PMCID: PMC6362118 DOI: 10.1038/s41598-019-38579-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 12/10/2018] [Indexed: 01/27/2023] Open
Abstract
CDC25 phosphatases play a key role in cell cycle transitions and are important targets for cancer therapy. Here, we set out to discover novel CDC25 inhibitors. Using a combination of computational methods, we defined a minimal common pharmacophore in established CDC25 inhibitors and performed virtual screening of a proprietary library. Based on the availability of crystal structures for CDC25A and CDC25B, we implemented a molecular docking strategy and carried out hit expansion/optimization. Enzymatic assays revealed that naphthoquinone scaffolds were the most promising CDC25 inhibitors among selected hits. At the molecular level, the compounds acted through a mixed-type mechanism of inhibition of phosphatase activity, involving reversible oxidation of cysteine residues. In 2D cell cultures, the compounds caused arrest of the cell cycle at the G1/S or at the G2/M transition. Mitotic markers analysis and time-lapse microscopy confirmed that CDK1 activity was impaired and that mitotic arrest was followed by death. Finally, the compounds induced differentiation, accompanied by decreased stemness properties, in intestinal crypt stem cell-derived Apc/K-Ras-mutant mouse organoids, and led to tumor regression and reduction of metastatic potential in zebrafish embryo xenografts used as in vivo model.
Collapse
|
24
|
Lafarga V, Sung HM, Haneke K, Roessig L, Pauleau AL, Bruer M, Rodriguez-Acebes S, Lopez-Contreras AJ, Gruss OJ, Erhardt S, Mendez J, Fernandez-Capetillo O, Stoecklin G. TIAR marks nuclear G2/M transition granules and restricts CDK1 activity under replication stress. EMBO Rep 2019; 20:e46224. [PMID: 30538118 PMCID: PMC6322364 DOI: 10.15252/embr.201846224] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 11/06/2018] [Accepted: 11/08/2018] [Indexed: 12/20/2022] Open
Abstract
The G2/M checkpoint coordinates DNA replication with mitosis and thereby prevents chromosome segregation in the presence of unreplicated or damaged DNA Here, we show that the RNA-binding protein TIAR is essential for the G2/M checkpoint and that TIAR accumulates in nuclear foci in late G2 and prophase in cells suffering from replication stress. These foci, which we named G2/M transition granules (GMGs), occur at low levels in normally cycling cells and are strongly induced by replication stress. In addition to replication stress response proteins, GMGs contain factors involved in RNA metabolism as well as CDK1. Depletion of TIAR accelerates mitotic entry and leads to chromosomal instability in response to replication stress, in a manner that can be alleviated by the concomitant depletion of Cdc25B or inhibition of CDK1. Since TIAR retains CDK1 in GMGs and attenuates CDK1 activity, we propose that the assembly of GMGs may represent a so far unrecognized mechanism that contributes to the activation of the G2/M checkpoint in mammalian cells.
Collapse
Affiliation(s)
- Vanesa Lafarga
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
- Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Hsu-Min Sung
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
- Division of Biochemistry, Center for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Katharina Haneke
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
- Division of Biochemistry, Center for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Lea Roessig
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
| | - Anne-Laure Pauleau
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
- Department of Cellular and Molecular Medicine, Center for Chromosome Stability and Center for Healthy Aging University of Copenhagen, Copenhagen, Denmark
| | - Marius Bruer
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
- Division of Biochemistry, Center for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | | | - Andres J Lopez-Contreras
- Spanish National Cancer Research Centre (CNIO), Madrid, Spain
- CellNetworks Excellence Cluster, Heidelberg University, Heidelberg, Germany
| | - Oliver J Gruss
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
| | - Sylvia Erhardt
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
- Department of Cellular and Molecular Medicine, Center for Chromosome Stability and Center for Healthy Aging University of Copenhagen, Copenhagen, Denmark
| | - Juan Mendez
- Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Oscar Fernandez-Capetillo
- Spanish National Cancer Research Centre (CNIO), Madrid, Spain
- Science for Life Laboratory, Division of Genome Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Georg Stoecklin
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
- Division of Biochemistry, Center for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| |
Collapse
|
25
|
Chen J, Rajasekaran M, Xia H, Kong SN, Deivasigamani A, Sekar K, Gao H, Swa HL, Gunaratne J, Ooi LL, Xie T, Hong W, Hui KM. CDK1-mediated BCL9 phosphorylation inhibits clathrin to promote mitotic Wnt signalling. EMBO J 2018; 37:embj.201899395. [PMID: 30217955 DOI: 10.15252/embj.201899395] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 08/11/2018] [Accepted: 08/23/2018] [Indexed: 11/09/2022] Open
Abstract
Uncontrolled cell division is a hallmark of cancer. Deregulation of Wnt components has been linked to aberrant cell division by multiple mechanisms, including Wnt-mediated stabilisation of proteins signalling, which was notably observed in mitosis. Analysis of Wnt components revealed an unexpected role of B-cell CLL/lymphoma 9 (BCL9) in maintaining mitotic Wnt signalling to promote precise cell division and growth of cancer cell. Mitotic interactome analysis revealed a mechanistic role of BCL9 in inhibiting clathrin-mediated degradation of LRP6 signalosome components by interacting with clathrin and the components in Wnt destruction complex; this function was further controlled by CDK1-driven phosphorylation of BCL9 N-terminal, especially T172. Interestingly, T172 phosphorylation was correlated with cancer patient prognosis and enriched in tumours. Thus, our results revealed a novel role of BCL9 in controlling mitotic Wnt signalling to promote cell division and growth.
Collapse
Affiliation(s)
- Jianxiang Chen
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, School of Medicine, Holistic Integrative Pharmacy Institutes (HIPI), Hangzhou Normal University, Hangzhou, China .,Laboratory of Cancer Genomics, Division of Cellular and Molecular Research, National Cancer Centre Singapore, Singapore City, Singapore.,Institute of Molecular and Cell Biology, A*STAR, Proteos, Singapore
| | - Muthukumar Rajasekaran
- Laboratory of Cancer Genomics, Division of Cellular and Molecular Research, National Cancer Centre Singapore, Singapore City, Singapore
| | - Hongping Xia
- Laboratory of Cancer Genomics, Division of Cellular and Molecular Research, National Cancer Centre Singapore, Singapore City, Singapore
| | - Shik Nie Kong
- Laboratory of Cancer Genomics, Division of Cellular and Molecular Research, National Cancer Centre Singapore, Singapore City, Singapore
| | - Amudha Deivasigamani
- Laboratory of Cancer Genomics, Division of Cellular and Molecular Research, National Cancer Centre Singapore, Singapore City, Singapore
| | - Karthik Sekar
- Laboratory of Cancer Genomics, Division of Cellular and Molecular Research, National Cancer Centre Singapore, Singapore City, Singapore
| | - Hengjun Gao
- Laboratory of Cancer Genomics, Division of Cellular and Molecular Research, National Cancer Centre Singapore, Singapore City, Singapore
| | - Hannah Lf Swa
- Institute of Molecular and Cell Biology, A*STAR, Proteos, Singapore
| | | | - London Lucien Ooi
- Division of Surgery, Singapore General Hospital, Singapore City, Singapore
| | - Tian Xie
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, School of Medicine, Holistic Integrative Pharmacy Institutes (HIPI), Hangzhou Normal University, Hangzhou, China
| | - Wanjin Hong
- Institute of Molecular and Cell Biology, A*STAR, Proteos, Singapore
| | - Kam Man Hui
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, School of Medicine, Holistic Integrative Pharmacy Institutes (HIPI), Hangzhou Normal University, Hangzhou, China .,Laboratory of Cancer Genomics, Division of Cellular and Molecular Research, National Cancer Centre Singapore, Singapore City, Singapore.,Institute of Molecular and Cell Biology, A*STAR, Proteos, Singapore.,Cancer and Stem Cell Biology Program, Duke-NUS Medical School, Singapore City, Singapore.,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore
| |
Collapse
|
26
|
Zhong Y, Yang J, Xu WW, Wang Y, Zheng CC, Li B, He QY. KCTD12 promotes tumorigenesis by facilitating CDC25B/CDK1/Aurora A-dependent G2/M transition. Oncogene 2017; 36:6177-6189. [PMID: 28869606 PMCID: PMC5671937 DOI: 10.1038/onc.2017.287] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Revised: 06/19/2017] [Accepted: 07/14/2017] [Indexed: 02/06/2023]
Abstract
Cell cycle dysregulation leads to uncontrolled cell proliferation and tumorigenesis. Understanding the molecular mechanisms underlying cell cycle progression can provide clues leading to the identification of key proteins involved in cancer development. In this study, we performed proteomics analysis to identify novel regulators of the cell cycle. We found that potassium channel tetramerization domain containing 12 (KCTD12) was significantly upregulated in M phase compared with S phase. We also found that KCTD12 overexpression not only facilitated the G2/M transition and induced cancer cell proliferation, but also promoted the growth of subcutaneous tumors and Ki-67 proliferation index in mice. Regarding the mechanism underlying these phenomena, cyclin-dependent kinase 1 (CDK1) was identified as an interacting partner of KCTD12 by immunoprecipitation and mass spectrometry analysis, which showed that KCTD12 activated CDK1 and Aurora kinase A (Aurora A) and that the effects of KCTD12 on CDK1 phosphorylation and cell proliferation were abrogated by cell division cycle 25B (CDC25B) silencing. In addition, Aurora A phosphorylated KCTD12 at serine 243, thereby initiating a positive feedback loop necessary for KCTD12 to exert its cancer-promoting effects. Furthermore, we analyzed the expression levels of various genes and the correlations between the expression of these genes and survival using tumor tissue microarray and Gene Expression Omnibus (GEO) data sets. The data showed that KCTD12 expression was significantly upregulated in cervical and lung cancers. More importantly, high KCTD12 expression was associated with larger tumor sizes, higher pathological stages and poor patient survival. Collectively, our study demonstrate that KCTD12 binds to CDC25B and activates CDK1 and Aurora A to facilitate the G2/M transition and promote tumorigenesis and that Aurora A phosphorylates KCTD12 at serine 243 to trigger a positive feedback loop, thereby potentiating the effects of KCTD12. Thus, the KCTD12-CDC25B-CDK1-Aurora A axis has important implications for cancer diagnoses and prognoses.
Collapse
Affiliation(s)
- Y Zhong
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China.,Department of Pathology, Medical College, Jinan University, Guangzhou, China
| | - J Yang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - W W Xu
- Institute of Biomedicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, National Engineering Research Center of Genetic Medicine, Jinan University, Guangzhou, China
| | - Y Wang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - C-C Zheng
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - B Li
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Q-Y He
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| |
Collapse
|
27
|
Samofalova DO, Karpov PA, Raevsky AV, Blume YB. Protein phosphatases potentially associated with regulation of microtubules, their spatial structure reconstruction and analysis. Cell Biol Int 2017; 43:1081-1090. [PMID: 28653783 DOI: 10.1002/cbin.10810] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 06/24/2017] [Indexed: 11/12/2022]
Abstract
According to the sequence and profile comparison with known catalytic domains, where identified protein phosphatases potentially involved in regulation of microtubule dynamics and structure from Arabidopsis thaliana, Nicotiana tabacum, Medicago sativa, Oryza sativa subsp. japonica, Zea mays, and Triticum aestivum. Selected proteins were related to classical non-receptor, serine/threonine-specific and dual protein phosphatases. By application of template structures of human protein phosphatases, it was performed homology modelling of the catalytic domains of 17 plant protein phosphatases. Based on the results of the structural alignment, molecular dynamics, and conservatism in positions of functionally importance, it was confirmed homology of selected plant proteins and known protein phosphatases regulating structure and dynamics of microtubules.
Collapse
Affiliation(s)
- Dariya O Samofalova
- Institute of Food Biotechnology and Genomics, Natl. Academy of Sci. of Ukraine, Osipovskogo str. 2a, Kyiv, 04123, Ukraine
| | - Pavel A Karpov
- Institute of Food Biotechnology and Genomics, Natl. Academy of Sci. of Ukraine, Osipovskogo str. 2a, Kyiv, 04123, Ukraine
| | - Alexey V Raevsky
- Institute of Food Biotechnology and Genomics, Natl. Academy of Sci. of Ukraine, Osipovskogo str. 2a, Kyiv, 04123, Ukraine
| | - Yaroslav B Blume
- Institute of Food Biotechnology and Genomics, Natl. Academy of Sci. of Ukraine, Osipovskogo str. 2a, Kyiv, 04123, Ukraine
| |
Collapse
|
28
|
de Gooijer MC, van den Top A, Bockaj I, Beijnen JH, Würdinger T, van Tellingen O. The G2 checkpoint-a node-based molecular switch. FEBS Open Bio 2017; 7:439-455. [PMID: 28396830 PMCID: PMC5377395 DOI: 10.1002/2211-5463.12206] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 01/09/2017] [Accepted: 01/18/2017] [Indexed: 12/20/2022] Open
Abstract
Tight regulation of the eukaryotic cell cycle is paramount to ensure genomic integrity throughout life. Cell cycle checkpoints are present in each phase of the cell cycle and prevent cell cycle progression when genomic integrity is compromised. The G2 checkpoint is an intricate signaling network that regulates the progression of G2 to mitosis (M). We propose here a node-based model of G2 checkpoint regulation, in which the action of the central CDK1-cyclin B1 node is determined by the concerted but opposing activities of the Wee1 and cell division control protein 25C (CDC25C) nodes. Phosphorylation of both Wee1 and CDC25C at specific sites determines their subcellular localization, driving them either toward activity within the nucleus or to the cytoplasm and subsequent ubiquitin-mediated proteasomal degradation. In turn, this subcellular balance of the Wee1 and CDC25C nodes is directed by the action of the PLK1 and CHK1 nodes via what we have termed the 'nuclear and cytoplasmic decision states' of Wee1 and CDC25C. The proposed node-based model provides an intelligible structure of the complex interactions that govern the decision to delay or continue G2/M progression. The model may also aid in predicting the effects of agents that target these G2 checkpoint nodes.
Collapse
Affiliation(s)
- Mark C. de Gooijer
- Division of Pharmacology/Mouse Cancer ClinicThe Netherlands Cancer InstituteAmsterdamThe Netherlands
| | - Arnout van den Top
- Division of Pharmacology/Mouse Cancer ClinicThe Netherlands Cancer InstituteAmsterdamThe Netherlands
| | - Irena Bockaj
- Division of Pharmacology/Mouse Cancer ClinicThe Netherlands Cancer InstituteAmsterdamThe Netherlands
| | - Jos H. Beijnen
- Department of Pharmacy and PharmacologyThe Netherlands Cancer Institute/Slotervaart HospitalAmsterdamThe Netherlands
- Division of Drug ToxicologyFaculty of PharmacyUtrecht UniversityThe Netherlands
- Division of Biomedical AnalysisFaculty of ScienceUtrecht UniversityThe Netherlands
| | - Thomas Würdinger
- Neuro‐oncology Research GroupDepartments of Neurosurgery and Pediatric Oncology/HematologyCancer Center AmsterdamVU University Medical CenterThe Netherlands
- Molecular Neurogenetics UnitDepartments of Neurology and RadiologyMassachusetts General HospitalBostonMAUSA
- Neuroscience ProgramHarvard Medical SchoolBostonMAUSA
| | - Olaf van Tellingen
- Division of Pharmacology/Mouse Cancer ClinicThe Netherlands Cancer InstituteAmsterdamThe Netherlands
| |
Collapse
|
29
|
Cellular Dynamics Controlled by Phosphatases. J Indian Inst Sci 2017. [DOI: 10.1007/s41745-016-0016-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
30
|
Abstract
Here, we review how DNA damage affects the centrosome and how centrosomes communicate with the DNA damage response (DDR) apparatus. We discuss how several proteins of the DDR are found at centrosomes, including the ATM, ATR, CHK1 and CHK2 kinases, the BRCA1 ubiquitin ligase complex and several members of the poly(ADP-ribose) polymerase family. Stereotypical centrosome organisation, in which two centriole barrels are orthogonally arranged in a roughly toroidal pericentriolar material (PCM), is strongly affected by exposure to DNA-damaging agents. We describe the genetic dependencies and mechanisms for how the centrioles lose their close association, and the PCM both expands and distorts after DNA damage. Another consequence of genotoxic stress is that centrosomes undergo duplication outside the normal cell cycle stage, meaning that centrosome amplification is commonly seen after DNA damage. We discuss several potential mechanisms for how centrosome numbers become dysregulated after DNA damage and explore the links between the DDR and the PLK1- and separase-dependent mechanisms that drive centriole separation and reduplication. We also describe how centrosome components, such as centrin2, are directly involved in responding to DNA damage. This review outlines current questions on the involvement of centrosomes in the DDR.
Collapse
Affiliation(s)
- Lisa I Mullee
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Biosciences Building, Dangan, Galway, Ireland
| | - Ciaran G Morrison
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Biosciences Building, Dangan, Galway, Ireland.
| |
Collapse
|
31
|
Mazzolini L, Broban A, Froment C, Burlet-Schiltz O, Besson A, Manenti S, Dozier C. Phosphorylation of CDC25A on SER283 in late S/G2 by CDK/cyclin complexes accelerates mitotic entry. Cell Cycle 2016; 15:2742-52. [PMID: 27580187 DOI: 10.1080/15384101.2016.1220455] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The Cdc25A phosphatase is an essential activator of CDK-cyclin complexes at all steps of the eukaryotic cell cycle. The activity of Cdc25A is itself regulated in part by positive and negative feedback regulatory loops performed by its CDK-cyclin substrates that occur in G1 as well as during the G1/S and G2/M transitions. However, the regulation of Cdc25A during G2 phase progression before mitotic entry has not been intensively characterized. Here, we identify by mass spectrometry analysis a new phosphorylation event of Cdc25A on Serine283. Phospho-specific antibodies revealed that the phosphorylation of this residue appears in late S/G2 phase of an unperturbed cell cycle and is performed by CDK-cyclin complexes. Overexpression studies of wild-type and non-phosphorylatable mutant forms of Cdc25A indicated that Ser283 phosphorylation increases the G2/M-promoting activity of the phosphatase without impacting its stability or subcellular localization. Our results therefore identify a new positive regulatory loop between Cdc25A and its CDK-cyclin substrates which contributes to accelerate entry into mitosis through the regulation of Cdc25A activity in G2.
Collapse
Affiliation(s)
- Laurent Mazzolini
- a Centre de Recherche en Cancérologie de Toulouse, INSERM UMR1037, CNRS ERL5294 , Université Toulouse III Paul Sabatier , Toulouse , France.,b Equipe labellisée LIGUE contre le Cancer , CNRS ERL5294 , Toulouse , France
| | - Anaïs Broban
- a Centre de Recherche en Cancérologie de Toulouse, INSERM UMR1037, CNRS ERL5294 , Université Toulouse III Paul Sabatier , Toulouse , France
| | - Carine Froment
- c Institut de Pharmacologie et de Biologie Structurale , Université Toulouse III Paul Sabatier Toulouse , CNRS UMR5089 , Toulouse , France
| | - Odile Burlet-Schiltz
- c Institut de Pharmacologie et de Biologie Structurale , Université Toulouse III Paul Sabatier Toulouse , CNRS UMR5089 , Toulouse , France
| | - Arnaud Besson
- a Centre de Recherche en Cancérologie de Toulouse, INSERM UMR1037, CNRS ERL5294 , Université Toulouse III Paul Sabatier , Toulouse , France.,b Equipe labellisée LIGUE contre le Cancer , CNRS ERL5294 , Toulouse , France
| | - Stéphane Manenti
- a Centre de Recherche en Cancérologie de Toulouse, INSERM UMR1037, CNRS ERL5294 , Université Toulouse III Paul Sabatier , Toulouse , France.,b Equipe labellisée LIGUE contre le Cancer , CNRS ERL5294 , Toulouse , France
| | - Christine Dozier
- a Centre de Recherche en Cancérologie de Toulouse, INSERM UMR1037, CNRS ERL5294 , Université Toulouse III Paul Sabatier , Toulouse , France.,b Equipe labellisée LIGUE contre le Cancer , CNRS ERL5294 , Toulouse , France
| |
Collapse
|
32
|
14-3-3γ Prevents Centrosome Amplification and Neoplastic Progression. Sci Rep 2016; 6:26580. [PMID: 27253419 PMCID: PMC4890593 DOI: 10.1038/srep26580] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 05/04/2016] [Indexed: 12/21/2022] Open
Abstract
More than 80% of malignant tumors show centrosome amplification and clustering. Centrosome amplification results from aberrations in the centrosome duplication cycle, which is strictly coordinated with DNA-replication-cycle. However, the relationship between cell-cycle regulators and centrosome duplicating factors is not well understood. This report demonstrates that 14-3-3γ localizes to the centrosome and 14-3-3γ loss leads to centrosome amplification. Loss of 14-3-3γ results in the phosphorylation of NPM1 at Thr-199, causing early centriole disjunction and centrosome hyper-duplication. The centrosome amplification led to aneuploidy and increased tumor formation in mice. Importantly, an increase in passage of the 14-3-3γ-knockdown cells led to an increase in the number of cells containing clustered centrosomes leading to the generation of pseudo-bipolar spindles. The increase in pseudo-bipolar spindles was reversed and an increase in the number of multi-polar spindles was observed upon expression of a constitutively active 14-3-3-binding-defective-mutant of cdc25C (S216A) in the 14-3-3γ knockdown cells. The increase in multi-polar spindle formation was associated with decreased cell viability and a decrease in tumor growth. Our findings uncover the molecular basis of regulation of centrosome duplication by 14-3-3γ and inhibition of tumor growth by premature activation of the mitotic program and the disruption of centrosome clustering.
Collapse
|
33
|
Terada M, Seki M, Takahashi R, Yamada S, Higashibata A, Majima HJ, Sudoh M, Mukai C, Ishioka N. Effects of a Closed Space Environment on Gene Expression in Hair Follicles of Astronauts in the International Space Station. PLoS One 2016; 11:e0150801. [PMID: 27029003 PMCID: PMC4814050 DOI: 10.1371/journal.pone.0150801] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 02/19/2016] [Indexed: 11/24/2022] Open
Abstract
Adaptation to the space environment can sometimes pose physiological problems to International Space Station (ISS) astronauts after their return to earth. Therefore, it is important to develop healthcare technologies for astronauts. In this study, we examined the feasibility of using hair follicles, a readily obtained sample, to assess gene expression changes in response to spaceflight adaptation. In order to investigate the gene expression changes in human hair follicles during spaceflight, hair follicles of 10 astronauts were analyzed by microarray and real time qPCR analyses. We found that spaceflight alters human hair follicle gene expression. The degree of changes in gene expression was found to vary among individuals. In some astronauts, genes related to hair growth such as FGF18, ANGPTL7 and COMP were upregulated during flight, suggesting that spaceflight inhibits cell proliferation in hair follicles.
Collapse
Affiliation(s)
- Masahiro Terada
- Divison of Aerospace Medicine, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
- Space Biosciences Division, NASA Ames Research Center, Moffett Field, California, United States of America
- * E-mail:
| | - Masaya Seki
- Advanced Engineering Services Co., Ltd., Takezono, Tsukuba City, Ibaraki, Japan
| | - Rika Takahashi
- Advanced Engineering Services Co., Ltd., Takezono, Tsukuba City, Ibaraki, Japan
| | - Shin Yamada
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
| | - Akira Higashibata
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
- Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima City, Kagoshima, Japan
| | - Hideyuki J. Majima
- Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima City, Kagoshima, Japan
| | - Masamichi Sudoh
- Divison of Aerospace Medicine, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
| | - Chiaki Mukai
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
| | - Noriaki Ishioka
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
- Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima City, Kagoshima, Japan
- Institute of Space and Astronautical Science, Sagamihara, Kanagawa, Japan
- Department of Space and Astronautical Science, School of Physical Sciences, SOKENDAI (The Graduate University for Advanced Studies), Sagamihara, Kanagawa, Japan
| |
Collapse
|
34
|
Chen S, Sun KX, Feng MX, Sang XB, Liu BL, Zhao Y. Role of glycogen synthase kinase-3β inhibitor AZD1080 in ovarian cancer. DRUG DESIGN DEVELOPMENT AND THERAPY 2016; 10:1225-32. [PMID: 27051274 PMCID: PMC4807899 DOI: 10.2147/dddt.s102506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Glycogen synthase kinase-3β (GSK-3β) is a multifunctional serine/threonine kinase that plays an important role in cancer tumorigenesis and progression. We investigated the role of the GSK-3β inhibitor AZD1080 in ovarian cancer cell lines. Methods A2780 and OVCAR3 ovarian cancer cell lines were exposed to AZD1080, after which cell proliferation, cell cycle, invasion, and migration assays were performed. Phalloidin staining was used to observe lamellipodia formation. Reverse transcription polymerase chain reaction and Western blot were used to assess the respective mRNA and protein expression levels of GSK-3β, CDK2, CDK1, cyclin D1, matrix metalloproteinase-9 (MMP9), and Bcl-xL. Results AZD1080 exposure suppressed ovarian cancer cell proliferation, invasion, migration, and lamellipodia formation, and induced G1 arrest, which was concentration dependent. AZD1080 also significantly downregulated GSK-3β, CDK2, CDK1, cyclin D1, MMP9, and Bcl-xL expression at both mRNA and protein levels. Conclusion Taken together, our results demonstrate that the GSK-3β inhibitor AZD1080 suppresses ovarian cancer development and therefore may indicate a new direction for ovarian cancer treatment.
Collapse
Affiliation(s)
- Shuo Chen
- Department of Gynecology, The First affiliated Hospital of China Medical University, Shenyang, People's Republic of China
| | - Kai-Xuan Sun
- Department of Gynecology, The First affiliated Hospital of China Medical University, Shenyang, People's Republic of China
| | - Miao-Xiao Feng
- Department of Gynecology, The First affiliated Hospital of China Medical University, Shenyang, People's Republic of China
| | - Xiu-Bo Sang
- Department of Gynecology, The First affiliated Hospital of China Medical University, Shenyang, People's Republic of China
| | - Bo-Liang Liu
- Department of Gynecology, The First affiliated Hospital of China Medical University, Shenyang, People's Republic of China
| | - Yang Zhao
- Department of Gynecology, The First affiliated Hospital of China Medical University, Shenyang, People's Republic of China
| |
Collapse
|
35
|
Molnár J, Szebeni GJ, Csupor-Löffler B, Hajdú Z, Szekeres T, Saiko P, Ocsovszki I, Puskás LG, Hohmann J, Zupkó I. Investigation of the Antiproliferative Properties of Natural Sesquiterpenes from Artemisia asiatica and Onopordum acanthium on HL-60 Cells in Vitro. Int J Mol Sci 2016; 17:83. [PMID: 26901188 PMCID: PMC4783873 DOI: 10.3390/ijms17020083] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 12/10/2015] [Accepted: 12/29/2015] [Indexed: 11/16/2022] Open
Abstract
Plants and plant extracts play a crucial role in the research into novel antineoplastic agents. Four sesquiterpene lactones, artecanin (1), 3β-chloro-4α,10α-dihydroxy-1α,2α-epoxy-5α,7αH-guaia-11(13)-en-12,6α-olide (2), iso-seco-tanapartholide 3-O-methyl ether (3) and 4β,15-dihydro-3-dehydrozaluzanin C (4), were isolated from two traditionally used Asteraceae species (Onopordum acanthium and Artemisia asiatica). When tested for antiproliferative action on HL-60 leukemia cells, these compounds exhibited reasonable IC50 values in the range 3.6–13.5 μM. Treatment with the tested compounds resulted in a cell cycle disturbance characterized by increases in the G1 and G2/M populations, while there was a decrease in the S phase. Additionally, 1–3 elicited increases in the hypodiploid (subG1) population. The compounds elicited concentration-dependent chromatin condensation and disruption of the membrane integrity, as revealed by Hoechst 33258–propidium staining. Treatment for 24 h resulted in significant increases in activity of caspases-3 and -9, indicating that the tested sesquiterpenes induced the mitochondrial pathway of apoptosis. The proapoptotic properties of the sesquiterpene lactones were additionally demonstrated withannexin V staining. Compounds 1 and 2 increased the Bax/Bcl-2 expression and decreased the expressions of CDK1 and cyclin B2, as determined at the mRNA level by means of RT-PCR. These experimental results indicate that sesquiterpene lactones may be regarded as potential starting structures for the development of novel anticancer agents.
Collapse
Affiliation(s)
- Judit Molnár
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, H-6720 Szeged, Hungary.
| | | | | | - Zsuzsanna Hajdú
- Department of Pharmacognosy, University of Szeged, H-6720 Szeged, Hungary.
| | - Thomas Szekeres
- Department of Medical and Chemical Laboratory Diagnostics, Medical University of Vienna, A-1090 Vienna, Austria.
| | - Philipp Saiko
- Department of Medical and Chemical Laboratory Diagnostics, Medical University of Vienna, A-1090 Vienna, Austria.
| | - Imre Ocsovszki
- Department of Biochemistry, University of Szeged, H-6720 Szeged, Hungary.
| | | | - Judit Hohmann
- Department of Pharmacognosy, University of Szeged, H-6720 Szeged, Hungary.
| | - István Zupkó
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, H-6720 Szeged, Hungary.
| |
Collapse
|
36
|
Pinder A, Loo D, Harrington B, Oakes V, Hill MM, Gabrielli B. JIP4 is a PLK1 binding protein that regulates p38MAPK activity in G2 phase. Cell Signal 2015; 27:2296-303. [PMID: 26291670 DOI: 10.1016/j.cellsig.2015.08.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 08/13/2015] [Accepted: 08/14/2015] [Indexed: 12/19/2022]
Abstract
Cell cycle progression from G2 phase into mitosis is regulated by a complex network of mechanisms, all of which finally control the timing of Cyclin B/CDK1 activation. PLK1 regulates a network of events that contribute to regulating G2/M phase progression. Here we have used a proteomics approach to identify proteins that specifically bind to the Polobox domain of PLK1. This identified a panel of proteins that were either associated with PLK1 in G2 phase and/or mitosis, the strongest interaction being with the MAPK scaffold protein JIP4. PLK1 binding to JIP4 was found in G2 phase and mitosis, and PLK1 binding was self-primed by PLK1 phosphorylation of JIP4. PLK1 binding is required for JIP4-dependent p38MAPK activation in G2 phase during normal cell cycle progression, but not in either G2 phase or mitotic stress response. Finally, JIP4 is a target for caspase-dependent cleavage in mitotically arrested cells. The role for the PLK1-JIP4 regulated p38MAPK activation in G2 phase is unclear, but it does not affect either progression into or through mitosis.
Collapse
Affiliation(s)
- Alex Pinder
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Dorothy Loo
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Brittney Harrington
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Vanessa Oakes
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Michelle M Hill
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Brian Gabrielli
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia.
| |
Collapse
|
37
|
Ito Y, Narita N, Nomi N, Sugimoto C, Takabayashi T, Yamada T, Karaya K, Matsumoto H, Fujieda S. Suppression of Poly(rC)-Binding Protein 4 (PCBP4) reduced cisplatin resistance in human maxillary cancer cells. Sci Rep 2015. [PMID: 26196957 PMCID: PMC4508830 DOI: 10.1038/srep12360] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Cisplatin plays an important role in the therapy for human head and neck cancers. However, cancer cells develop cisplatin resistance, leading to difficulty in treatment and poor prognosis. To analyze cisplatin-resistant mechanisms, a cisplatin-resistant cell line, IMC-3CR, was established from the IMC-3 human maxillary cancer cell line. Flow cytometry revealed that, compared with IMC-3 cells, cisplatin more dominantly induced cell cycle G2/M arrest rather than apoptosis in IMC-3CR cells. That fact suggests that IMC-3CR cells avoid cisplatin-induced apoptosis through induction of G2/M arrest, which allows cancer cells to repair damaged DNA and survive. In the present study, we specifically examined Poly(rC)-Binding Protein 4 (PCBP4), which reportedly induces G2/M arrest. Results showed that suppression of PCBP4 by RNAi reduced cisplatin-induced G2/M arrest and enhanced apoptosis in IMC-3CR cells, resulting in the reduction of cisplatin resistance. In contrast, overexpression of PCBP4 in IMC-3 cells induced G2/M arrest after cisplatin treatment and enhanced cisplatin resistance. We revealed that PCBP4 combined with Cdc25A and suppressed the expression of Cdc25A, resulting in G2/M arrest. PCBP4 plays important roles in the induction of cisplatin resistance in human maxillary cancers. PCBP4 is a novel molecular target for the therapy of head and neck cancers, especially cisplatin-resistant cancers.
Collapse
Affiliation(s)
- Yumi Ito
- Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, 23 Shimoaizuki, Matsuoka, Eiheiji, Fukui, 910-1193, Japan
| | - Norihiko Narita
- Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, 23 Shimoaizuki, Matsuoka, Eiheiji, Fukui, 910-1193, Japan
| | - Nozomi Nomi
- Department of Otorhinolaryngology, Faculty of Medical Sciences, University of Oita
| | - Chizuru Sugimoto
- Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, 23 Shimoaizuki, Matsuoka, Eiheiji, Fukui, 910-1193, Japan
| | - Tetsuji Takabayashi
- Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, 23 Shimoaizuki, Matsuoka, Eiheiji, Fukui, 910-1193, Japan
| | - Takechiyo Yamada
- Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, 23 Shimoaizuki, Matsuoka, Eiheiji, Fukui, 910-1193, Japan
| | - Kazuhiro Karaya
- Division of Bioresearch, Life Science Research Laboratory, Faculty of Medical Sciences, University of Fukui, 23 Shimoaizuki, Matsuoka, Eiheiji, Fukui, 910-1193, Japan
| | - Hideki Matsumoto
- Division of Oncology, Biomedical Imaging Research Center, Faculty of Medical Sciences, University of Fukui, 23 Shimoaizuki, Matsuoka, Eiheiji, Fukui, 910-1193, Japan
| | - Shigeharu Fujieda
- Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, 23 Shimoaizuki, Matsuoka, Eiheiji, Fukui, 910-1193, Japan
| |
Collapse
|
38
|
Mahapatra DK, Bharti SK, Asati V. Anti-cancer chalcones: Structural and molecular target perspectives. Eur J Med Chem 2015; 98:69-114. [PMID: 26005917 DOI: 10.1016/j.ejmech.2015.05.004] [Citation(s) in RCA: 316] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 04/16/2015] [Accepted: 05/05/2015] [Indexed: 12/12/2022]
Abstract
Chalcone or (E)-1,3-diphenyl-2-propene-1-one scaffold remained a fascination among researchers in the 21st century due to its simple chemistry, ease of synthesis and a wide variety of promising biological activities. Several natural and (semi) synthetic chalcones have shown anti-cancer activity due to their inhibitory potential against various targets namely ABCG2/P-gp/BCRP, 5α-reductase, aromatase, 17-β-hydroxysteroid dehydrogenase, HDAC/Situin-1, proteasome, VEGF, VEGFR-2 kinase, MMP-2/9, JAK/STAT signaling pathways, CDC25B, tubulin, cathepsin-K, topoisomerase-II, Wnt, NF-κB, B-Raf and mTOR etc. In this review, a comprehensive study on molecular targets/pathways involved in carcinogenesis, mechanism of actions (MOAs), structure activity relationships (SARs) and patents granted have been highlighted. With the knowledge of molecular targets, structural insights and SARs, this review may be helpful for (medicinal) chemists to design more potent, safe, selective and cost effective anti-cancer chalcones.
Collapse
Affiliation(s)
- Debarshi Kar Mahapatra
- Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur 495009, Chhattisgarh, India
| | - Sanjay Kumar Bharti
- Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur 495009, Chhattisgarh, India.
| | - Vivek Asati
- Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur 495009, Chhattisgarh, India
| |
Collapse
|
39
|
Arquint C, Gabryjonczyk AM, Nigg EA. Centrosomes as signalling centres. Philos Trans R Soc Lond B Biol Sci 2015; 369:rstb.2013.0464. [PMID: 25047618 DOI: 10.1098/rstb.2013.0464] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Centrosomes-as well as the related spindle pole bodies (SPBs) of yeast-have been extensively studied from the perspective of their microtubule-organizing roles. Moreover, the biogenesis and duplication of these organelles have been the subject of much attention, and the importance of centrosomes and the centriole-ciliary apparatus for human disease is well recognized. Much less developed is our understanding of another facet of centrosomes and SPBs, namely their possible role as signalling centres. Yet, many signalling components, including kinases and phosphatases, have been associated with centrosomes and spindle poles, giving rise to the hypothesis that these organelles might serve as hubs for the integration and coordination of signalling pathways. In this review, we discuss a number of selected studies that bear on this notion. We cover different processes (cell cycle control, development, DNA damage response) and organisms (yeast, invertebrates and vertebrates), but have made no attempt to be comprehensive. This field is still young and although the concept of centrosomes and SPBs as signalling centres is attractive, it remains primarily a concept-in need of further scrutiny. We hope that this review will stimulate thought and experimentation.
Collapse
Affiliation(s)
- Christian Arquint
- Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland
| | | | - Erich A Nigg
- Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland
| |
Collapse
|
40
|
Hatzihristidis T, Desai N, Hutchins AP, Meng TC, Tremblay ML, Miranda-Saavedra D. A Drosophila-centric view of protein tyrosine phosphatases. FEBS Lett 2015; 589:951-66. [PMID: 25771859 DOI: 10.1016/j.febslet.2015.03.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 03/02/2015] [Accepted: 03/02/2015] [Indexed: 12/30/2022]
Abstract
Most of our knowledge on protein tyrosine phosphatases (PTPs) is derived from human pathologies and mouse knockout models. These models largely correlate well with human disease phenotypes, but can be ambiguous due to compensatory mechanisms introduced by paralogous genes. Here we present the analysis of the PTP complement of the fruit fly and the complementary view that PTP studies in Drosophila will accelerate our understanding of PTPs in physiological and pathological conditions. With only 44 PTP genes, Drosophila represents a streamlined version of the human complement. Our integrated analysis places the Drosophila PTPs into evolutionary and functional contexts, thereby providing a platform for the exploitation of the fly for PTP research and the transfer of knowledge onto other model systems.
Collapse
Affiliation(s)
- Teri Hatzihristidis
- Goodman Cancer Research Centre, McGill University, 1160 Pine Avenue, Montreal, Québec H3A 1A3, Canada; Department of Medicine, Division of Experimental Medicine, McGill University, Montreal, Quebec, Canada
| | - Nikita Desai
- Goodman Cancer Research Centre, McGill University, 1160 Pine Avenue, Montreal, Québec H3A 1A3, Canada; Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Andrew P Hutchins
- Key Laboratory of Regenerative Biology and Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong 510530, China
| | - Tzu-Ching Meng
- Taiwan International Graduate Program, Academia Sinica, Taipei, Taiwan; Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan; Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Michel L Tremblay
- Goodman Cancer Research Centre, McGill University, 1160 Pine Avenue, Montreal, Québec H3A 1A3, Canada; Department of Medicine, Division of Experimental Medicine, McGill University, Montreal, Quebec, Canada; Department of Biochemistry, McGill University, Montreal, Quebec, Canada.
| | - Diego Miranda-Saavedra
- World Premier International (WPI) Immunology Frontier Research Center (IFReC), Osaka University, 3-1 Yamadaoka, Suita 565-0871, Osaka, Japan; Centro de Biología Molecular Severo Ochoa, CSIC/Universidad Autónoma de Madrid, 28049 Madrid, Spain; IE Business School, IE University, María de Molina 31 bis, 28006 Madrid, Spain.
| |
Collapse
|
41
|
Molnár J, Frank É, Minorics R, Kádár Z, Ocsovszki I, Schönecker B, Wölfling J, Zupkó I. A click approach to novel D-ring-substituted 16α-triazolylestrone derivatives and characterization of their antiproliferative properties. PLoS One 2015; 10:e0118104. [PMID: 25692552 PMCID: PMC4333823 DOI: 10.1371/journal.pone.0118104] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 01/06/2015] [Indexed: 12/13/2022] Open
Abstract
A simple and efficient synthesis of novel, D-ring substituted estrone derivatives containing a 16α-triazolyl moiety is described. Two epimeric azido alcohols (16α-azido-17α-hydroxy and 16α-azido-17β-hydroxy) of estra-1,3,5(10)-triene-3-methyl ether were prepared, followed by copper(I)-catalyzed azide-alkyne cycloaddition with various terminal alkynes. The steroidal triazoles were obtained in high yields and their activities against three human cancer cell lines (HeLa, MCF7 and A431) were screened. The most effective analogs were submitted to additional experiments in order to characterize their antiproliferative properties. As evidenced by flow cytometry, the selected steroids induced a disturbance in the HeLa cell cycle in a concentration- and exposure-dependent manner, through an increase of the hypodiploid population (subG1) and a cell cycle arrest in the G2/M phase. A noncancerous human fibroblast cell line (MRC5) was used to determine the selectivities of these compounds. Fluorescent microscopy after Hoechst 33258 - propidium iodide (HOPI) double staining revealed nuclear condensation and disturbed cell membrane integrity. The enhanced activities of caspase-3 and caspase-9 without activation of caspase-8 in the treated cells indicated the activation of the intrinsic pathway of apoptosis. The levels of cell cycle regulators (CDK1, cyclin B1/B2 and cdc25B) were decreased and the ratio Bax/Bcl-2 was increased 24 h after the treatment of HeLa cells (determined at an mRNA level by means of an RT-PCR technique). Under the same conditions, two agents elicited substantially increased degrees of phosphorylation of stathmin, as evidenced by Western blotting. The presented results demonstrate that these steroids can be regarded as appropriate structural scaffolds for the design and synthesis of further steroid analogs as innovative drug candidates with good efficacy.
Collapse
Affiliation(s)
- Judit Molnár
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, Szeged, Hungary
| | - Éva Frank
- Department of Organic Chemistry, University of Szeged, Szeged, Hungary
| | - Renáta Minorics
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, Szeged, Hungary
| | - Zalán Kádár
- Department of Organic Chemistry, University of Szeged, Szeged, Hungary
| | - Imre Ocsovszki
- Department of Biochemistry, University of Szeged, Szeged, Hungary
| | - Bruno Schönecker
- Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University Jena, Jena, Germany
| | - János Wölfling
- Department of Organic Chemistry, University of Szeged, Szeged, Hungary
- * E-mail: (JW); (IZ)
| | - István Zupkó
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, Szeged, Hungary
- * E-mail: (JW); (IZ)
| |
Collapse
|
42
|
Abstract
The centrosome was discovered in the late 19th century when mitosis was first described. Long recognized as a key organelle of the spindle pole, its core component, the centriole, was realized more than 50 or so years later also to comprise the basal body of the cilium. Here, we chart the more recent acquisition of a molecular understanding of centrosome structure and function. The strategies for gaining such knowledge were quickly developed in the yeasts to decipher the structure and function of their distinctive spindle pole bodies. Only within the past decade have studies with model eukaryotes and cultured cells brought a similar degree of sophistication to our understanding of the centrosome duplication cycle and the multiple roles of this organelle and its component parts in cell division and signaling. Now as we begin to understand these functions in the context of development, the way is being opened up for studies of the roles of centrosomes in human disease.
Collapse
Affiliation(s)
- Jingyan Fu
- Cancer Research UK Cell Cycle Genetics Group, Department of Genetics, University of Cambridge, Cambridge CB2 3EH, United Kingdom
| | - Iain M Hagan
- Cancer Research UK Manchester Institute, University of Manchester, Withington, Manchester M20 4BX, United Kingdom
| | - David M Glover
- Cancer Research UK Cell Cycle Genetics Group, Department of Genetics, University of Cambridge, Cambridge CB2 3EH, United Kingdom
| |
Collapse
|
43
|
Brenner AK, Reikvam H, Lavecchia A, Bruserud Ø. Therapeutic targeting the cell division cycle 25 (CDC25) phosphatases in human acute myeloid leukemia--the possibility to target several kinases through inhibition of the various CDC25 isoforms. Molecules 2014; 19:18414-47. [PMID: 25397735 PMCID: PMC6270710 DOI: 10.3390/molecules191118414] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 10/28/2014] [Accepted: 11/02/2014] [Indexed: 01/26/2023] Open
Abstract
The cell division cycle 25 (CDC25) phosphatases include CDC25A, CDC25B and CDC25C. These three molecules are important regulators of several steps in the cell cycle, including the activation of various cyclin-dependent kinases (CDKs). CDC25s seem to have a role in the development of several human malignancies, including acute myeloid leukemia (AML); and CDC25 inhibition is therefore considered as a possible anticancer strategy. Firstly, upregulation of CDC25A can enhance cell proliferation and the expression seems to be controlled through PI3K-Akt-mTOR signaling, a pathway possibly mediating chemoresistance in human AML. Loss of CDC25A is also important for the cell cycle arrest caused by differentiation induction of malignant hematopoietic cells. Secondly, high CDC25B expression is associated with resistance against the antiproliferative effect of PI3K-Akt-mTOR inhibitors in primary human AML cells, and inhibition of this isoform seems to reduce AML cell line proliferation through effects on NFκB and p300. Finally, CDC25C seems important for the phenotype of AML cells at least for a subset of patients. Many of the identified CDC25 inhibitors show cross-reactivity among the three CDC25 isoforms. Thus, by using such cross-reactive inhibitors it may become possible to inhibit several molecular events in the regulation of cell cycle progression and even cytoplasmic signaling, including activation of several CDKs, through the use of a single drug. Such combined strategies will probably be an advantage in human cancer treatment.
Collapse
Affiliation(s)
- Annette K Brenner
- Section for Hematology, Institute of Clinical Science, Faculty of Medicine and Dentistry, University of Bergen, Bergen, 5021, Norway
| | - Håkon Reikvam
- Section for Hematology, Institute of Clinical Science, Faculty of Medicine and Dentistry, University of Bergen, Bergen, 5021, Norway
| | - Antonio Lavecchia
- "Drug Discovery" Laboratory, Department of Pharmacy, University of Naples Federico II, Naples 80131, Italy
| | - Øystein Bruserud
- Section for Hematology, Institute of Clinical Science, Faculty of Medicine and Dentistry, University of Bergen, Bergen, 5021, Norway.
| |
Collapse
|
44
|
He RJ, Yu ZH, Zhang RY, Zhang ZY. Protein tyrosine phosphatases as potential therapeutic targets. Acta Pharmacol Sin 2014; 35:1227-46. [PMID: 25220640 DOI: 10.1038/aps.2014.80] [Citation(s) in RCA: 246] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 07/31/2014] [Indexed: 12/17/2022] Open
Abstract
Protein tyrosine phosphorylation is a key regulatory process in virtually all aspects of cellular functions. Dysregulation of protein tyrosine phosphorylation is a major cause of human diseases, such as cancers, diabetes, autoimmune disorders, and neurological diseases. Indeed, protein tyrosine phosphorylation-mediated signaling events offer ample therapeutic targets, and drug discovery efforts to date have brought over two dozen kinase inhibitors to the clinic. Accordingly, protein tyrosine phosphatases (PTPs) are considered next-generation drug targets. For instance, PTP1B is a well-known targets of type 2 diabetes and obesity, and recent studies indicate that it is also a promising target for breast cancer. SHP2 is a bona-fide oncoprotein, mutations of which cause juvenile myelomonocytic leukemia, acute myeloid leukemia, and solid tumors. In addition, LYP is strongly associated with type 1 diabetes and many other autoimmune diseases. This review summarizes recent findings on several highly recognized PTP family drug targets, including PTP1B, Src homology phosphotyrosyl phosphatase 2(SHP2), lymphoid-specific tyrosine phosphatase (LYP), CD45, Fas associated phosphatase-1 (FAP-1), striatal enriched tyrosine phosphatases (STEP), mitogen-activated protein kinase/dual-specificity phosphatase 1 (MKP-1), phosphatases of regenerating liver-1 (PRL), low molecular weight PTPs (LMWPTP), and CDC25. Given that there are over 100 family members, we hope this review will serve as a road map for innovative drug discovery targeting PTPs.
Collapse
|
45
|
Ding Y, Su S, Tang W, Zhang X, Chen S, Zhu G, Liang J, Wei W, Guo Y, Liu L, Chen YG, Wu W. Enrichment of the β-catenin-TCF complex at the S and G2 phases ensures cell survival and cell cycle progression. J Cell Sci 2014; 127:4833-45. [PMID: 25236602 DOI: 10.1242/jcs.146977] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Wnt-β-catenin (β-catenin is also known as CTNNB1 in human) signaling through the β-catenin-TCF complex plays crucial roles in tissue homeostasis. Wnt-stimulated β-catenin-TCF complex accumulation in the nucleus regulates cell survival, proliferation and differentiation through the transcription of target genes. Compared with their levels in G1, activation of the receptor LRP6 and cytosolic β-catenin are both upregulated in G2 cells. However, accumulation of the Wnt pathway negative regulator AXIN2 also occurs in this phase. Therefore, it is unclear whether Wnt signaling is active in G2 phase cells. Here, we established a bimolecular fluorescence complementation (BiFC) biosensor system for the direct visualization of the β-catenin-TCF interaction in living cells. Using the BiFC biosensor and co-immunoprecipitation experiments, we demonstrate that levels of the nucleus-localized β-catenin-TCF complex increase during the S and G2 phases, and declines in the next G1 phase. Accordingly, a subset of Wnt target genes is transcribed by the β-catenin-TCF complex during both the S and G2 phases. By contrast, transient inhibition of this complex disturbs both cell survival and G2/M progression. Our results suggest that in S and G2 phase cells, Wnt-β-catenin signaling is highly active and functions to ensure cell survival and cell cycle progression.
Collapse
Affiliation(s)
- Yajie Ding
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Shang Su
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Weixin Tang
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Xiaolei Zhang
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Shengyao Chen
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Guixin Zhu
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Juan Liang
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Wensheng Wei
- School of Life Sciences, Peking University, Beijing 100871, China
| | - Ye Guo
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua-Peking Center for Life Sciences, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Lei Liu
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua-Peking Center for Life Sciences, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Ye-Guang Chen
- The State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Wei Wu
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| |
Collapse
|
46
|
Discovery and characterization of novel imidazopyridine derivative CHEQ-2 as a potent CDC25 inhibitor and promising anticancer drug candidate. Eur J Med Chem 2014; 82:293-307. [PMID: 24922544 DOI: 10.1016/j.ejmech.2014.05.063] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 05/06/2014] [Accepted: 05/26/2014] [Indexed: 11/23/2022]
Abstract
Cell division cycle (CDC) 25 proteins are key phosphatases regulating cell cycle transition and proliferation via the interactions with CDK/Cyclin complexes. Overexpression of CDC25 proteins is frequently observed in cancer and is related to aggressiveness, high-grade tumors and poor prognosis. Thus, inhibiting CDC25 activity in cancer treatment appears a good therapeutic strategy. In this article, refinement of the initial hit XDW-1 by synthesis and screening of a focused compound library led to the identification of a novel set of imidazopyridine derivatives as potent CDC25 inhibitors. Among them, the most potent molecule was CHEQ-2, which could efficiently inhibit the activities of CDC25A/B enzymes as well as the proliferation of various different types of cancer cell lines in vitro assay. Moreover, CHEQ-2 triggered S-phase cell cycle arrest in MCF-7, HepG2 and HT-29 cell lines, accompanied by generation of ROS, mitochondrial dysfunction and apoptosis. Besides, oral administration of CHEQ-2 (10 mg/kg) significantly inhibited xenografted human liver tumor growth in nude mice, while demonstrated extremely low toxicity (LD50 > 2000 mg/kg). These findings make CHEQ-2 a good starting point for further investigation and structure modification.
Collapse
|
47
|
Tane S, Kubota M, Okayama H, Ikenishi A, Yoshitome S, Iwamoto N, Satoh Y, Kusakabe A, Ogawa S, Kanai A, Molkentin JD, Nakamura K, Ohbayashi T, Takeuchi T. Repression of cyclin D1 expression is necessary for the maintenance of cell cycle exit in adult mammalian cardiomyocytes. J Biol Chem 2014; 289:18033-44. [PMID: 24821722 DOI: 10.1074/jbc.m113.541953] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The hearts of neonatal mice and adult zebrafish can regenerate after injury through proliferation of preexisting cardiomyocytes. However, adult mammals are not capable of cardiac regeneration because almost all cardiomyocytes exit their cell cycle. Exactly how the cell cycle exit is maintained and how many adult cardiomyocytes have the potential to reenter the cell cycle are unknown. The expression and activation levels of main cyclin-cyclin-dependent kinase (CDK) complexes are extremely low or undetectable at adult stages. The nuclear DNA content of almost all cardiomyocytes is 2C, indicating the cell cycle exit from G1-phase. Here, we induced expression of cyclin D1, which regulates the progression of G1-phase, only in differentiated cardiomyocytes of adult mice. In these cardiomyocytes, S-phase marker-positive cardiomyocytes and the expression of main cyclins and CDKs increased remarkably, although cyclin B1-CDK1 activation was inhibited in an ATM/ATR-independent manner. The phosphorylation pattern of CDK1 and expression pattern of Cdc25 subtypes suggested that a deficiency in the increase in Cdc25 (a and -b), which is required for M-phase entry, inhibited the cyclin B1-CDK1 activation. Finally, analysis of cell cycle distribution patterns showed that >40% of adult mouse cardiomyocytes reentered the cell cycle by the induction of cyclin D1. The cell cycle of these binucleated cardiomyocytes was arrested before M-phase, and many mononucleated cardiomyocytes entered endoreplication. These data indicate that silencing the cyclin D1 expression is necessary for the maintenance of the cell cycle exit and suggest a mechanism that involves inhibition of M-phase entry.
Collapse
Affiliation(s)
- Shoji Tane
- From the School of Life Sciences, Faculty of Medicine
| | - Misae Kubota
- Mitsubishi Kagaku Institute of Life Sciences, Machida 194-8511, Japan, and
| | | | - Aiko Ikenishi
- From the School of Life Sciences, Faculty of Medicine
| | | | | | - Yukio Satoh
- From the School of Life Sciences, Faculty of Medicine
| | - Aoi Kusakabe
- Mitsubishi Kagaku Institute of Life Sciences, Machida 194-8511, Japan, and
| | - Satoko Ogawa
- Mitsubishi Kagaku Institute of Life Sciences, Machida 194-8511, Japan, and
| | - Ayumi Kanai
- From the School of Life Sciences, Faculty of Medicine
| | - Jeffery D Molkentin
- Cincinnati Children's Hospital Medical Center, University of Cincinnati, Howard Hughes Medical Institute, Cincinnati, Ohio 45229
| | - Kazuomi Nakamura
- Division of Laboratory Animal Science, Research Center for Bioscience and Technology, Tottori University, Yonago 683-8503, Japan
| | - Tetsuya Ohbayashi
- Division of Laboratory Animal Science, Research Center for Bioscience and Technology, Tottori University, Yonago 683-8503, Japan
| | - Takashi Takeuchi
- From the School of Life Sciences, Faculty of Medicine, Mitsubishi Kagaku Institute of Life Sciences, Machida 194-8511, Japan, and
| |
Collapse
|
48
|
Thomas Y, Peter M, Mechali F, Blanchard JM, Coux O, Baldin V. Kizuna is a novel mitotic substrate for CDC25B phosphatase. Cell Cycle 2014; 13:3867-77. [PMID: 25558830 PMCID: PMC4615109 DOI: 10.4161/15384101.2014.972882] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 09/26/2014] [Accepted: 09/30/2014] [Indexed: 11/29/2022] Open
Abstract
CDC25 dual-specificity phosphatases play a central role in cell cycle control through the activation of Cyclin-Dependent Kinases (CDKs). Expression during mitosis of a stabilized CDC25B mutant (CDC25B-DDA), which cannot interact with the F-box protein βTrCP for proteasome-dependent degradation, causes mitotic defects and chromosome segregation errors in mammalian cells. We found, using the same CDC25B mutant, that stabilization and failure to degrade CDC25B during mitosis lead to the appearance of multipolar spindle cells resulting from a fragmentation of pericentriolar material (PCM) and abolish mitotic Plk1-dependent phosphorylation of Kizuna (Kiz), which is essential for the function of Kiz in maintaining spindle pole integrity. Thus, in mitosis Kiz is a new substrate of CDC25B whose dephosphorylation following CDC25B stabilization leads to the formation of multipolar spindles. Furthermore, endogenous Kiz and CDC25B interact only in mitosis, suggesting that Kiz phosphorylation depends on a balance between CDC25B and Plk1 activities. Our data identify a novel mitotic substrate of CDC25B phosphatase that plays a key role in mitosis control.
Collapse
Affiliation(s)
- Yann Thomas
- Centre de Recherche de Biochimie Macromoléculaire (CRBM);; Montpellier, France
- Université Montpellier 2; Montpellier, France
- Université Montpellier 1; Montpellier, France
- The MRC Protein Phosphorylation and Ubiquitylation Unit; College of Life Sciences; University of Dundee; Dundee, Scotland
| | - Marion Peter
- Université Montpellier 1; Montpellier, France
- The MRC Protein Phosphorylation and Ubiquitylation Unit; College of Life Sciences; University of Dundee; Dundee, Scotland
- Institut de Génétique Moléculaire de Montpellier (IGMM); Center National de la Recherche Scientifique (CNRS); Montpellier, France
| | - Francisca Mechali
- Centre de Recherche de Biochimie Macromoléculaire (CRBM);; Montpellier, France
- Université Montpellier 2; Montpellier, France
- Université Montpellier 1; Montpellier, France
| | - Jean-Marie Blanchard
- Université Montpellier 1; Montpellier, France
- The MRC Protein Phosphorylation and Ubiquitylation Unit; College of Life Sciences; University of Dundee; Dundee, Scotland
- Institut de Génétique Moléculaire de Montpellier (IGMM); Center National de la Recherche Scientifique (CNRS); Montpellier, France
| | - Olivier Coux
- Centre de Recherche de Biochimie Macromoléculaire (CRBM);; Montpellier, France
- Université Montpellier 2; Montpellier, France
- Université Montpellier 1; Montpellier, France
| | - Véronique Baldin
- Centre de Recherche de Biochimie Macromoléculaire (CRBM);; Montpellier, France
- Université Montpellier 2; Montpellier, France
- Université Montpellier 1; Montpellier, France
| |
Collapse
|
49
|
Overexpression of mutant cell division cycle 25 homolog B (CDC25B) enhances the efficiency of selection in Chinese hamster ovary cells. Cytotechnology 2013; 65:1017-26. [PMID: 24248275 DOI: 10.1007/s10616-013-9662-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 10/18/2013] [Indexed: 10/26/2022] Open
Abstract
The effects of mutant cell division cycle 25 homolog B (CDC25B) overexpression on the generation of cells producing a monoclonal antibody were investigated in Chinese hamster ovary (CHO) cells. Mutant CDC25B (m-CDC25B) expression plasmids were transfected into CHO DG44-derived cells producing a monoclonal antibody, and the frequency of highly producing cells was assessed following gene amplification in the presence of 250 nM methotrexate. Most of the clones obtained from the m-CDC25B-overexpressing cells had higher antibody titers than did mock-transfected control cells. This arose from either higher transgene copy numbers or higher mRNA expression levels for the antibody. However, the high mRNA expression levels were not always accompanied by increases in transgene copy numbers. Our results suggest that cells producing high levels of a monoclonal antibody can be selected efficiently using m-CDC25B overexpression.
Collapse
|
50
|
Shen M, Cai Y, Yang Y, Yan X, Liu X, Zhou T. Centrosomal protein FOR20 is essential for S-phase progression by recruiting Plk1 to centrosomes. Cell Res 2013; 23:1284-95. [PMID: 24018379 PMCID: PMC3817547 DOI: 10.1038/cr.2013.127] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 07/13/2013] [Accepted: 07/16/2013] [Indexed: 12/28/2022] Open
Abstract
Centrosomes are required for efficient cell cycle progression mainly by orchestrating microtubule dynamics and facilitating G1/S and G2/M transitions. However, the role of centrosomes in S-phase progression is largely unknown. Here, we report that depletion of FOR20 (FOP-related protein of 20 kDa), a conserved centrosomal protein, inhibits S-phase progression and prevents targeting of Plk1 (polo-like kinase 1) to centrosomes, where FOR20 interacts with Plk1. Ablation of Plk1 also significantly induces S-phase defects, which are reversed by ectopic expression of Plk1, even a kinase-dead mutant, but not a mutant that fails to localize to centrosomes. Exogenous expression of centrosome-tethered Plk1, but not wild-type Plk1, overrides FOR20 depletion-induced S-phase defects independently of its kinase activity. Thus, these data indicate that recruitment of Plk1 to centrosomes by FOR20 may act as a signal to license efficient progression of S-phase. This represents a hitherto uncharacterized role of centrosomes in cell cycle regulation.
Collapse
Affiliation(s)
- Minhong Shen
- Department of Cell Biology and Program in Molecular Cell Biology, Zhejiang University School of Medicine, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, Zhejiang 310003, China
| | - Yuqi Cai
- Department of Cell Biology and Program in Molecular Cell Biology, Zhejiang University School of Medicine, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, Zhejiang 310003, China
| | - Yuehong Yang
- Department of Cell Biology and Program in Molecular Cell Biology, Zhejiang University School of Medicine, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, Zhejiang 310003, China
| | - Xiaoyi Yan
- Department of Cell Biology and Program in Molecular Cell Biology, Zhejiang University School of Medicine, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, Zhejiang 310003, China
| | - Xiaoqi Liu
- Department of Biochemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Tianhua Zhou
- Department of Cell Biology and Program in Molecular Cell Biology, Zhejiang University School of Medicine, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, Zhejiang 310003, China
| |
Collapse
|