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Grigoreva TA, Novikova DS, Melino G, Barlev NA, Tribulovich VG. Ubiquitin recruiting chimera: more than just a PROTAC. Biol Direct 2024; 19:55. [PMID: 38978100 PMCID: PMC11232244 DOI: 10.1186/s13062-024-00497-8] [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: 05/21/2024] [Accepted: 06/26/2024] [Indexed: 07/10/2024] Open
Abstract
Ubiquitinylation of protein substrates results in various but distinct biological consequences, among which ubiquitin-mediated degradation is most well studied for its therapeutic application. Accordingly, artificially targeted ubiquitin-dependent degradation of various proteins has evolved into the therapeutically relevant PROTAC technology. This tethered ubiquitinylation of various targets coupled with a broad assortment of modifying E3 ubiquitin ligases has been made possible by rational design of bi-specific chimeric molecules that bring these proteins in proximity. However, forced ubiquitinylation inflicted by the binary warheads of a chimeric PROTAC molecule should not necessarily result in protein degradation but can be used to modulate other cellular functions. In this respect it should be noted that the ubiquitinylation of a diverse set of proteins is known to control their transport, transcriptional activity, and protein-protein interactions. This review provides examples of potential PROTAC usage based on non-degradable ubiquitinylation.
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Affiliation(s)
- Tatyana A Grigoreva
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), St. Petersburg, 190013, Russia.
| | - Daria S Novikova
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), St. Petersburg, 190013, Russia
| | - Gerry Melino
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, 00133, Italy
| | - Nick A Barlev
- Institute of Cytology RAS, Saint-Petersburg, 194064, Russia
- Department of Biomedical Studies, School of Medicine, Nazarbayev University, Astana, 010000, Kazakhstan
| | - Vyacheslav G Tribulovich
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), St. Petersburg, 190013, Russia.
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Lubachowski M, VanGenderen C, Valentine S, Belak Z, Davies GF, Arnason TG, Harkness TAA. Activation of the Anaphase Promoting Complex Restores Impaired Mitotic Progression and Chemosensitivity in Multiple Drug-Resistant Human Breast Cancer. Cancers (Basel) 2024; 16:1755. [PMID: 38730707 PMCID: PMC11083742 DOI: 10.3390/cancers16091755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/22/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
The development of multiple-drug-resistant (MDR) cancer all too often signals the need for toxic alternative therapy or palliative care. Our recent in vivo and in vitro studies using canine MDR lymphoma cancer cells demonstrate that the Anaphase Promoting Complex (APC) is impaired in MDR cells compared to normal canine control and drug-sensitive cancer cells. Here, we sought to establish whether this phenomena is a generalizable mechanism independent of species, malignancy type, or chemotherapy regime. To test the association of blunted APC activity with MDR cancer behavior, we used matched parental and MDR MCF7 human breast cancer cells, and a patient-derived xenograft (PDX) model of human triple-negative breast cancer. We show that APC activating mechanisms, such as APC subunit 1 (APC1) phosphorylation and CDC27/CDC20 protein associations, are reduced in MCF7 MDR cells when compared to chemo-sensitive matched cell lines. Consistent with impaired APC function in MDR cells, APC substrate proteins failed to be effectively degraded. Similar to our previous observations in canine MDR lymphoma cells, chemical activation of the APC using Mad2 Inhibitor-1 (M2I-1) in MCF7 MDR cells enhanced APC substrate degradation and resensitized MDR cells in vitro to the cytotoxic effects of the alkylating chemotherapeutic agent, doxorubicin (DOX). Using cell cycle arrest/release experiments, we show that mitosis is delayed in MDR cells with elevated substrate levels. When pretreated with M2I-1, MDR cells progress through mitosis at a faster rate that coincides with reduced levels of APC substrates. In our PDX model, mice growing a clinically MDR human triple-negative breast cancer tumor show significantly reduced tumor growth when treated with M2I-1, with evidence of increased DNA damage and apoptosis. Thus, our results strongly support the hypothesis that APC impairment is a driver of aggressive tumor development and that targeting the APC for activation has the potential for meaningful clinical benefits in treating recurrent cases of MDR malignancy.
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Affiliation(s)
- Mathew Lubachowski
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada; (M.L.); (Z.B.); (G.F.D.)
- Division of Geriatrics, Department of Medicine, University of Alberta, Edmonton, AB T6G 2S2, Canada
| | - Cordell VanGenderen
- Department of Anatomy, Physiology and Pharmacology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada; (C.V.); (S.V.); (T.G.A.)
| | - Sarah Valentine
- Department of Anatomy, Physiology and Pharmacology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada; (C.V.); (S.V.); (T.G.A.)
| | - Zach Belak
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada; (M.L.); (Z.B.); (G.F.D.)
| | - Gerald Floyd Davies
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada; (M.L.); (Z.B.); (G.F.D.)
| | - Terra Gayle Arnason
- Department of Anatomy, Physiology and Pharmacology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada; (C.V.); (S.V.); (T.G.A.)
- Division of Endocrinology, Department of Medicine, University of Alberta, Edmonton, AB T6G 2S2, Canada
- Department of Medicine, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
| | - Troy Anthony Alan Harkness
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada; (M.L.); (Z.B.); (G.F.D.)
- Division of Geriatrics, Department of Medicine, University of Alberta, Edmonton, AB T6G 2S2, Canada
- 320 Heritage Medical Research Centre, University of Alberta, 11207-87 Ave NW, Edmonton, AB T6G 2S2, Canada
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3
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Damizia M, Altieri L, Costanzo V, Lavia P. Distinct Mitotic Functions of Nucleolar and Spindle-Associated Protein 1 (NuSAP1) Are Controlled by Two Consensus SUMOylation Sites. Cells 2023; 12:2545. [PMID: 37947624 PMCID: PMC10650578 DOI: 10.3390/cells12212545] [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: 10/04/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/12/2023] Open
Abstract
Nucleolar and Spindle-Associated Protein 1 (NuSAP1) is an important mitotic regulator, implicated in control of mitotic microtubule stability and chromosome segregation. NuSAP1 regulates these processes by interacting with several protein partners. Its abundance, activity and interactions are therefore tightly regulated during mitosis. Protein conjugation with SUMO (Small Ubiquitin-like MOdifier peptide) is a reversible post-translational modification that modulates rapid changes in the structure, interaction(s) and localization of proteins. NuSAP1 was previously found to interact with RANBP2, a nucleoporin with SUMO ligase and SUMO-stabilizing activity, but how this interaction affects NuSAP1 activity has remained elusive. Here, we show that NuSAP1 interacts with RANBP2 and forms proximity ligation products with SUMO2/3 peptides in a RANBP2-dependent manner at key mitotic sites. A bioinformatic search identified two putative SUMO consensus sites in NuSAP1, within the DNA-binding and the microtubule-binding domains, respectively. Site-specific mutagenesis, and mitotic phenotyping in cell lines expressing each NuSAP1 mutant version, revealed selective roles of each individual site in control of NuSAP1 localization and in generation of specific mitotic defects and distinct fates in daughter cells. These results identify therefore two new regulatory sites for NuSAP1 functions and implicate RANBP2 in control of NuSAP1 activity.
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Affiliation(s)
- Michela Damizia
- Institute of Molecular Biology and Pathology (IBPM), CNR National Research Council of Italy, 00185 Rome, Italy; (M.D.); (L.A.); (V.C.)
- Department of Biology and Biotechnology “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy
- Department of Cellular, Computational and Integrated Biology (CIBIO), University of Trento, 38123 Trento, Italy
| | - Ludovica Altieri
- Institute of Molecular Biology and Pathology (IBPM), CNR National Research Council of Italy, 00185 Rome, Italy; (M.D.); (L.A.); (V.C.)
- Department of Biology and Biotechnology “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy
| | - Vincenzo Costanzo
- Institute of Molecular Biology and Pathology (IBPM), CNR National Research Council of Italy, 00185 Rome, Italy; (M.D.); (L.A.); (V.C.)
| | - Patrizia Lavia
- Institute of Molecular Biology and Pathology (IBPM), CNR National Research Council of Italy, 00185 Rome, Italy; (M.D.); (L.A.); (V.C.)
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Zhang Y, Chen Q, Huang T, Zhu D, Lu Y. Bioinformatics-based screening of key genes for transformation of tyrosine kinase inhibitor-resistant lung adenocarcinoma to small cell lung cancer. Front Med (Lausanne) 2023; 10:1203461. [PMID: 37583423 PMCID: PMC10424445 DOI: 10.3389/fmed.2023.1203461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 07/17/2023] [Indexed: 08/17/2023] Open
Abstract
Purpose Lung adenocarcinoma (LUAD) is a common type of lung cancer. Cancer in a small number of patients with EGFR mutations will transform from LUAD to small cell lung cancer (SCLC) during epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI) therapiesr. The purpose of the present study was to identify the core genes related to the transformation of LUAD into SCLC and to explore the associated molecular mechanisms. Methods GSE29016, GSE1037, GSE6044 and GSE40275 mRNA microarray datasets from Gene Expression Omnibus (GEO) were analyzed to obtain differentially expressed genes (DEGs) between LUAD and SCLC tissues, and the results were used for network analysis of protein-protein interactions (PPIs). After identifying the hub gene by STRING and Cytoscape platform, we explored the relationship between hub genes and the occurrence and development of SCLC. Finally, the obtained hub genes were validated in treated LUAD cells. Results A total of 41 DEGs were obtained, four hub genes (EZH2, NUSAP1, TTK and UBE2C) were identified, and related prognostic information was obtained. The coexpressed genes of the hub gene set were further screened, and the analysis identified many genes related to the cell cycle. Subsequently, LUAD cell models with TP53 and RB1 inactivation and overexpression of ASCL1 were constructed, and then the expression of hub genes was detected, the results showed that the four hub genes were all elevated in the established cell model. Conclusion EZH2, NUSAP1, TTK and UBE2C may affect the transformation of LUAD to SCLC and represent new candidate molecular markers for the occurrence and development of SCLC.
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Affiliation(s)
- Ying Zhang
- Department of Oncology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Qiang Chen
- Department of Oncology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Ting Huang
- Department of Clinical Pathology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Di Zhu
- Department of Clinical Pathology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Yuanzhi Lu
- Department of Clinical Pathology, First Affiliated Hospital of Jinan University, Guangzhou, China
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Zhang X, Huang D, Li K, Han C, Li H, Li C, Liu L. Hmmr Acts as a Key Regulator in the ADSCs Proliferation and Mitosis. Stem Cell Rev Rep 2023:10.1007/s12015-023-10563-9. [PMID: 37222947 DOI: 10.1007/s12015-023-10563-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2023] [Indexed: 05/25/2023]
Abstract
Obesity is a common chronic health problem that requires lifelong efforts for the successful treatment. The proliferation of ADSCs is an essential step in the development of obesity. Identifying key regulators of ADSCs will be a novel strategy for adipogenesis inhibition and obesity prevention. In this study, transcriptomes of 15532 ADSCs were firstly profiled by single cell RNA-sequencing. On the basis of gene expression patterns, 15 cell subpopulations (six defined cell types) were distinguished. A subpopulation was identified as CD168+ ADSCs, and it was demonstrated to play a vital role in ADSCs proliferation. Furthermore, Hmmr, a specific marker gene of CD168+ ADSCs was found to be a critical gene associated with ADSCs proliferation and mitosis. Hmmr knockout resulted that ADSCs growth nearly arrested and aberrant nuclear division occurred. Finally, it was revealed that Hmmr promoted ADSCs proliferation through the extracellular signal-regulated kinase 1/2 signaling pathway. This study identified Hmmr as a key regulator in ADSCs proliferation and mitosis, and suggested that Hmmr may be a novel target for obesity prevention.
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Affiliation(s)
- Xiao Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases &, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, People's Republic of China
| | - Dou Huang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases &, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Kaide Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases &, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Chaoying Han
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, People's Republic of China
| | - Hui Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases &, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Cai Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases &, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Lei Liu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases &, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China.
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Guo K, Liu C, Shi J, Lai C, Gao Z, Luo J, Li Z, Tang Z, Li K, Xu K. HMMR promotes prostate cancer proliferation and metastasis via AURKA/mTORC2/E2F1 positive feedback loop. Cell Death Dis 2023; 9:48. [PMID: 36750558 PMCID: PMC9905489 DOI: 10.1038/s41420-023-01341-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/24/2023] [Accepted: 01/24/2023] [Indexed: 02/09/2023]
Abstract
Although dysregulated HMMR is linked to prostate cancer (PCa) prognosis, the precise mechanisms remain unclear. Here, we sought to elucidate the role of HMMR in PCa progression as well as underlying mechanism. Herein, we found that upregulation of HMMR frequently observed in PCa samples and was associated with poor prognosis. Additionally, HMMR significantly promoted PCa proliferation and metastasis through gain- and loss-of function approaches in vitro and in vivo. Mechanistically, HMMR may interact with AURKA and elevated AURKA protein level through inhibiting ubiquitination-mediated degradation, which subsequently activated mTORC2/AKT pathway to ensure the reinforcement of PCa progression. Moreover, upregulated E2F1 caused from sustained activation of mTORC2/AKT pathway in turn function as transcription factor to promote HMMR transcription, thereby forming a positive feedback loop to trigger PCa progression. Importantly, administration of the mTOR inhibitor partially antagonised HMMR-mediated PCa progression in vivo. In summary, we not only reveal a novel possible post-translation mechanism mediated by HMMR involved in AURKA regulation, but also describe a positive feedback loop that contributes to PCa deterioration, suggesting HMMR may serve as a potential promising therapeutic target in PCa.
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Affiliation(s)
- Kaixuan Guo
- grid.12981.330000 0001 2360 039XDepartment of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,grid.12981.330000 0001 2360 039XGuangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,Guangdong Provincial Clinical Research Center for Urological Diseases, Guangzhou, Guangdong P. R. China
| | - Cheng Liu
- grid.12981.330000 0001 2360 039XDepartment of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,grid.12981.330000 0001 2360 039XGuangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,Guangdong Provincial Clinical Research Center for Urological Diseases, Guangzhou, Guangdong P. R. China
| | - Juanyi Shi
- grid.12981.330000 0001 2360 039XGuangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,grid.12981.330000 0001 2360 039XDepartment of Hepatobiliary Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong P. R. China
| | - Cong Lai
- grid.12981.330000 0001 2360 039XDepartment of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,grid.12981.330000 0001 2360 039XGuangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,Guangdong Provincial Clinical Research Center for Urological Diseases, Guangzhou, Guangdong P. R. China
| | - Ze Gao
- grid.12981.330000 0001 2360 039XDepartment of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,grid.12981.330000 0001 2360 039XGuangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,Guangdong Provincial Clinical Research Center for Urological Diseases, Guangzhou, Guangdong P. R. China
| | - Jiawen Luo
- grid.12981.330000 0001 2360 039XDepartment of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,grid.12981.330000 0001 2360 039XGuangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,Guangdong Provincial Clinical Research Center for Urological Diseases, Guangzhou, Guangdong P. R. China
| | - Zhuohang Li
- grid.12981.330000 0001 2360 039XDepartment of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,grid.12981.330000 0001 2360 039XGuangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,Guangdong Provincial Clinical Research Center for Urological Diseases, Guangzhou, Guangdong P. R. China
| | - Zhuang Tang
- grid.12981.330000 0001 2360 039XDepartment of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,grid.12981.330000 0001 2360 039XGuangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong P. R. China ,Guangdong Provincial Clinical Research Center for Urological Diseases, Guangzhou, Guangdong P. R. China
| | - Kuiqing Li
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, P. R. China. .,Guangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, P. R. China. .,Guangdong Provincial Clinical Research Center for Urological Diseases, Guangzhou, Guangdong, P. R. China.
| | - Kewei Xu
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, P. R. China. .,Guangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, P. R. China. .,Guangdong Provincial Clinical Research Center for Urological Diseases, Guangzhou, Guangdong, P. R. China.
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Pibuel MA, Poodts D, Molinari Y, Díaz M, Amoia S, Byrne A, Hajos S, Lompardía S, Franco P. The importance of RHAMM in the normal brain and gliomas: physiological and pathological roles. Br J Cancer 2023; 128:12-20. [PMID: 36207608 PMCID: PMC9814267 DOI: 10.1038/s41416-022-01999-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: 05/16/2022] [Revised: 09/19/2022] [Accepted: 09/22/2022] [Indexed: 01/27/2023] Open
Abstract
Although the literature about the functions of hyaluronan and the CD44 receptor in the brain and brain tumours is extensive, the role of the receptor for hyaluronan-mediated motility (RHAMM) in neural stem cells and gliomas remain poorly explored. RHAMM is considered a multifunctional receptor which performs various biological functions in several normal tissues and plays a significant role in cancer development and progression. RHAMM was first identified for its ability to bind to hyaluronate, the extracellular matrix component associated with cell motility control. Nevertheless, additional functions of this protein imply the interaction with different partners or cell structures to regulate other biological processes, such as mitotic-spindle assembly, gene expression regulation, cell-cycle control and proliferation. In this review, we summarise the role of RHAMM in normal brain development and the adult brain, focusing on the neural stem and progenitor cells, and discuss the current knowledge on RHAMM involvement in glioblastoma progression, the most aggressive glioma of the central nervous system. Understanding the implications of RHAMM in the brain could be useful to design new therapeutic approaches to improve the prognosis and quality of life of glioblastoma patients.
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Affiliation(s)
- Matías A Pibuel
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica; Departamento de Microbiología, Inmunología y Biotecnología; Instituto de Estudios de la Inmunidad Humoral (IDEHU)-CONICET, Capital Federal (1113), Buenos Aires, Argentina.
| | - Daniela Poodts
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica; Departamento de Microbiología, Inmunología y Biotecnología; Instituto de Estudios de la Inmunidad Humoral (IDEHU)-CONICET, Capital Federal (1113), Buenos Aires, Argentina
| | - Yamila Molinari
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica; Departamento de Química Biológica. Instituto de Química y Fisicoquímica Biológicas (IQUIFIB)-CONICET, Capital Federal (1113), Buenos Aires, Argentina
| | - Mariángeles Díaz
- Instituto de Estudios de la Inmunidad Humoral (IDEHU)- CONICET, Universidad de Buenos Aires, Capital Federal (1113), Buenos Aires, Argentina
| | - Sofía Amoia
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica; Departamento de Microbiología, Inmunología y Biotecnología; Instituto de Estudios de la Inmunidad Humoral (IDEHU)-CONICET, Capital Federal (1113), Buenos Aires, Argentina
| | - Agustín Byrne
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica; Departamento de Química Biológica. Instituto de Química y Fisicoquímica Biológicas (IQUIFIB)-CONICET, Capital Federal (1113), Buenos Aires, Argentina
| | - Silvia Hajos
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica; Departamento de Microbiología, Inmunología y Biotecnología; Instituto de Estudios de la Inmunidad Humoral (IDEHU)-CONICET, Capital Federal (1113), Buenos Aires, Argentina
| | - Silvina Lompardía
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica; Departamento de Microbiología, Inmunología y Biotecnología; Instituto de Estudios de la Inmunidad Humoral (IDEHU)-CONICET, Capital Federal (1113), Buenos Aires, Argentina
| | - Paula Franco
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica; Departamento de Química Biológica. Instituto de Química y Fisicoquímica Biológicas (IQUIFIB)-CONICET, Capital Federal (1113), Buenos Aires, Argentina
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8
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Li J, Tang M, Wu J, Qu H, Tu M, Pan Z, Gao C, Yang Y, Qu C, Huang W, Hong J. NUSAP1, a novel stemness-related protein, promotes early recurrence of hepatocellular carcinoma. Cancer Sci 2022; 113:4165-4180. [PMID: 36106345 DOI: 10.1111/cas.15585] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 08/15/2022] [Accepted: 09/07/2022] [Indexed: 01/27/2023] Open
Abstract
Early recurrence (within 2 years after resection) is the primary cause of poor outcomes among hepatocellular carcinoma (HCC) patients, and liver cancer stem cells are the main contributors to postsurgical HCC recurrence. Nucleolar and spindle-associated protein 1 (NUSAP1) has been reported to be involved in tumor progression. We investigated the function and clinical value of NUSAP1 in early recurrence of HCC. Data from public datasets and our cohort were used to assess the association between NUSAP1 expression and early HCC recurrence. Gain- and loss-of-function experiments were carried out in vivo and in vitro. The predictive effect of NUSAP1 on early HCC recurrence was further evaluated by a validation cohort. We found that elevated NUSAP1 expression in HCC specimens was correlated with poor outcome, especially in cases with postoperative early recurrence. Functional studies indicated that NUSAP1 significantly promotes HCC progression. A postsurgical recurrence murine model further revealed that upregulated NUSAP1 dramatically increased the likelihood of HCC early recurrence. RNA sequencing data revealed that the gene sets of cancer stemness and the signal transducer and activator of transcription 3 (STAT3) pathway were enriched by NUSAP1 overexpression. Mechanistically, NUSAP1 enhanced cancer stemness through stimulating STAT3 nuclear translocation and activation through receptor of activated protein C kinase 1 (RACK1). In a validation cohort with 112 HCC patients, NUSAP1 effectively predicted HCC early recurrence. Our results indicated that NUSAP1 promotes early recurrence of HCC by sustaining cancer stemness and could serve as a valuable predictive indicator for postsurgical intervention in HCC patients.
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Affiliation(s)
- Jinying Li
- Department of Gastroenterology, The First Affiliated Hospital, Jinan University, Guangzhou, China.,Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, China
| | - Ming Tang
- Department of Gastroenterology, The First Affiliated Hospital, Jinan University, Guangzhou, China.,Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, China
| | - Junru Wu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, China
| | - Hengdong Qu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, China
| | - Mengxian Tu
- The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Zhaojie Pan
- Department of Gastroenterology, The First Affiliated Hospital, Jinan University, Guangzhou, China
| | - Chongqing Gao
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, China
| | - Yuping Yang
- Department of Gastroenterology, The First Affiliated Hospital, Jinan University, Guangzhou, China
| | - Chen Qu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, China
| | - Wei Huang
- Department of Gastroenterology, The First Affiliated Hospital, Jinan University, Guangzhou, China
| | - Jian Hong
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, China.,Department of Hepatological Surgery, The First Affiliated Hospital, Jinan University, Guangzhou, China
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9
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Sarkar R, Banerjee S, Halder P, Koley H, Komoto S, Chawla-Sarkar M. Suppression of classical nuclear import pathway by importazole and ivermectin inhibits rotavirus replication. J Antimicrob Chemother 2022; 77:3443-3455. [PMID: 36210599 DOI: 10.1093/jac/dkac339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 09/12/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Rotavirus is the foremost cause of acute gastroenteritis among infants in resource-poor countries, causing severe morbidity and mortality. The currently available rotavirus vaccines are effective in reducing severity of the disease but not the infection rates, thus antivirals as an adjunct therapy are needed to reduce the morbidity in children. Viruses rely on host cellular machinery for nearly every step of the replication cycle. Therefore, targeting host factors that are indispensable for virus replication could be a promising strategy. OBJECTIVES To assess the therapeutic potential of ivermectin and importazole against rotaviruses. METHODS Antirotaviral activity of importazole and ivermectin was measured against various rotavirus strains (RV-SA11, RV-Wa, RV-A5-13, RV-EW) in vitro and in vivo by quantifying viral protein expression by western blot, analysing viroplasm formation by confocal microscopy, and measuring virus yield by plaque assay. RESULTS Importin-β1 and Ran were found to be induced during rotavirus infection. Knocking down importin-β1 severely impaired rotavirus replication, suggesting a critical role for importin-β1 in the rotavirus life cycle. In vitro studies revealed that treatment of ivermectin and importazole resulted in reduced synthesis of viral proteins, diminished production of infectious virus particles, and decrease in viroplasm-positive cells. Mechanistic study proved that both drugs perform antirotavirus activity by inhibiting the function of importin-β1. In vivo investigations in mice also confirmed the antirotavirus potential of importazole and ivermectin at non-toxic doses. Treatments of rotavirus-infected mice with either drug resulted in diminished shedding of viral particles in the stool sample, reduced expression of viral protein in the small intestine and restoration of damaged intestinal villi comapared to untreated infected mice. CONCLUSIONS The study highlights the potential of importazole and ivermectin as antirotavirus therapeutics.
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Affiliation(s)
- Rakesh Sarkar
- Division of Virology, ICMR-National Institute of Cholera and Enteric Diseases, P-33, C.I.T. Road, Scheme-XM, Beliaghata, 700010, Kolkata, West Bengal, India
| | - Shreya Banerjee
- Division of Virology, ICMR-National Institute of Cholera and Enteric Diseases, P-33, C.I.T. Road, Scheme-XM, Beliaghata, 700010, Kolkata, West Bengal, India
| | - Prolay Halder
- Division of Bacteriology, ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, West Bengal, India
| | - Hemanta Koley
- Division of Bacteriology, ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, West Bengal, India
| | - Satoshi Komoto
- Department of Virology and Parasitology, Fujita Health University School of Medicine, Aichi, Japan
| | - Mamta Chawla-Sarkar
- Division of Virology, ICMR-National Institute of Cholera and Enteric Diseases, P-33, C.I.T. Road, Scheme-XM, Beliaghata, 700010, Kolkata, West Bengal, India
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10
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Damizia M, Altieri L, Lavia P. Non-transport roles of nuclear import receptors: In need of the right balance. Front Cell Dev Biol 2022; 10:1041938. [PMID: 36438555 PMCID: PMC9686011 DOI: 10.3389/fcell.2022.1041938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 10/21/2022] [Indexed: 11/12/2023] Open
Abstract
Nuclear import receptors ensure the recognition and transport of proteins across the nuclear envelope into the nucleus. In addition, as diverse processes as mitosis, post-translational modifications at mitotic exit, ciliogenesis, and phase separation, all share a common need for regulation by nuclear import receptors - particularly importin beta-1 and importin beta-2/transportin - independent on nuclear import. In particular, 1) nuclear import receptors regulate the mitotic spindle after nuclear envelope breakdown, 2) they shield cargoes from unscheduled ubiquitination, regulating their timely proteolysis; 3) they regulate ciliary factors, crucial to cell communications and tissue architecture during development; and 4) they prevent phase separation of toxic proteins aggregates in neurons. The balance of nuclear import receptors to cargoes is critical in all these processes, albeit in opposite directions: overexpression of import receptors, as often found in cancer, inhibits cargoes and impairs downstream processes, motivating the therapeutic design of specific inhibitors. On the contrary, elevated expression is beneficial in neuronal contexts, where nuclear import receptors are regarded as potential therapeutic tools in counteracting the formation of aggregates that may cause neurodegeneration. This paradox demonstrates the amplitude of nuclear import receptors-dependent functions in different contexts and adds complexity in considering their therapeutic implications.
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Affiliation(s)
- Michela Damizia
- Department of Cellular, Computational and Integrated Biology (CIBIO), University of Trento, Trento, Italy
| | - Ludovica Altieri
- Institute of Molecular Biology and Pathology (IBPM), CNR National Research Council of Italy, Sapienza University of Rome, Rome, Italy
- Department of Biology and Biotechnology “Charles Darwin”, Sapienza University of Rome, Rome, Italy
| | - Patrizia Lavia
- Institute of Molecular Biology and Pathology (IBPM), CNR National Research Council of Italy, Sapienza University of Rome, Rome, Italy
- Department of Biology and Biotechnology “Charles Darwin”, Sapienza University of Rome, Rome, Italy
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11
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Deng J, Zhang T, Liu F, Han Q, Li Q, Guo X, Ma Y, Li L, Shao G. CRL4-DCAF8L2 E3 ligase promotes ubiquitination and degradation of BARD1. Biochem Biophys Res Commun 2022; 611:107-113. [PMID: 35487060 DOI: 10.1016/j.bbrc.2022.04.100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 12/19/2022]
Abstract
BARD1 is a tumor suppressor that is necessary for the functioning and stability of BRCA1, with which it forms a heterodimer and participates in the repair of DNA double-strand breaks. The cellular level of BARD1 and its interaction with BRCA1 are crucial for BRCA1/BARD1 function in homologous recombination and tumor suppression. However, the regulatory mechanism underpinning the stability of BARD1 is largely unclear. In this study, we identified DCAF8L2, a DDB1-Cullin associated factor (DCAF) associated with CRL4 E3 ligase, as a negative regulator of BARD1. Mechanistically, DCAF8L2 interacts with and targets BARD1 for ubiquitination and degradation. In addition, the interaction of DCAF8L2 with BARD1 through the RING domain could compete with the dimerization of BRCA1 and BARD1, leading to increased cellular uncoupling of BARD1 and BRCA1, subjecting the latter to degradation. The overexpression of DCAF8L2 compromises the homologous recombination process and confers cells with increased sensitivity to DNA damage. Furthermore, DCAF8L2 was aberrantly expressed in breast cancer cell lines. Our findings suggest that DCAF8L2 may play an oncogenic role in the pathogenesis of breast cancer, possibly by negative regulation of BARD1.
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Affiliation(s)
- Jingcheng Deng
- Department of Cell Biology, Peking University Health Science Center, Beijing, 100191, China
| | - Ting Zhang
- Department of Cell Biology, Peking University Health Science Center, Beijing, 100191, China
| | - Fei Liu
- Department of Cell Biology, Peking University Health Science Center, Beijing, 100191, China
| | - Qianying Han
- Department of Cell Biology, Peking University Health Science Center, Beijing, 100191, China
| | - Qin Li
- Department of Cell Biology, Peking University Health Science Center, Beijing, 100191, China
| | - Xueyuan Guo
- Department of Cell Biology, Peking University Health Science Center, Beijing, 100191, China
| | - Yanfang Ma
- Department of Cell Biology, Peking University Health Science Center, Beijing, 100191, China
| | - Li Li
- Department of Cell Biology, Peking University Health Science Center, Beijing, 100191, China
| | - Genze Shao
- Department of Cell Biology, Peking University Health Science Center, Beijing, 100191, China.
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12
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Li YC, Wang Y, Zou W. Exploration on the Mechanism of Ubiquitin Proteasome System in Cerebral Stroke. Front Aging Neurosci 2022; 14:814463. [PMID: 35462700 PMCID: PMC9022456 DOI: 10.3389/fnagi.2022.814463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Accepted: 03/14/2022] [Indexed: 12/23/2022] Open
Abstract
Stroke’s secondary damage, such as inflammation, oxidative stress, and mitochondrial dysfunction, are thought to be crucial factors in the disease’s progression. Despite the fact that there are numerous treatments for secondary damage following stroke, such as antiplatelet therapy, anticoagulant therapy, surgery, and so on, the results are disappointing and the side effects are numerous. It is critical to develop novel and effective strategies for improving patient prognosis. The ubiquitin proteasome system (UPS) is the hub for the processing and metabolism of a wide range of functional regulatory proteins in cells. It is critical for the maintenance of cell homeostasis. With the advancement of UPS research in recent years, it has been discovered that UPS is engaged in a variety of physiological and pathological processes in the human body. UPS is expected to play a role in the onset and progression of stroke via multiple targets and pathways. This paper explores the method by which UPS participates in the linked pathogenic process following stroke, in order to give a theoretical foundation for further research into UPS and stroke treatment.
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Affiliation(s)
- Yu-Chao Li
- Heilongjiang University of Chinese Medicine, Harbin, China
| | - Yan Wang
- School of Traditional Chinese Medicine, Ningxia Medical University, Yinchuan, China
| | - Wei Zou
- Heilongjiang University of Chinese Medicine, Harbin, China
- First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin, China
- *Correspondence: Wei Zou,
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13
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Russi M, Marson D, Fermeglia A, Aulic S, Fermeglia M, Laurini E, Pricl S. The fellowship of the RING: BRCA1, its partner BARD1 and their liaison in DNA repair and cancer. Pharmacol Ther 2021; 232:108009. [PMID: 34619284 DOI: 10.1016/j.pharmthera.2021.108009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 08/22/2021] [Accepted: 09/20/2021] [Indexed: 12/12/2022]
Abstract
The breast cancer type 1 susceptibility protein (BRCA1) and its partner - the BRCA1-associated RING domain protein 1 (BARD1) - are key players in a plethora of fundamental biological functions including, among others, DNA repair, replication fork protection, cell cycle progression, telomere maintenance, chromatin remodeling, apoptosis and tumor suppression. However, mutations in their encoding genes transform them into dangerous threats, and substantially increase the risk of developing cancer and other malignancies during the lifetime of the affected individuals. Understanding how BRCA1 and BARD1 perform their biological activities therefore not only provides a powerful mean to prevent such fatal occurrences but can also pave the way to the development of new targeted therapeutics. Thus, through this review work we aim at presenting the major efforts focused on the functional characterization and structural insights of BRCA1 and BARD1, per se and in combination with all their principal mediators and regulators, and on the multifaceted roles these proteins play in the maintenance of human genome integrity.
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Affiliation(s)
- Maria Russi
- Molecular Biology and Nanotechnology Laboratory (MolBNL@UniTs), DEA, University of Trieste, Trieste, Italy
| | - Domenico Marson
- Molecular Biology and Nanotechnology Laboratory (MolBNL@UniTs), DEA, University of Trieste, Trieste, Italy
| | - Alice Fermeglia
- Molecular Biology and Nanotechnology Laboratory (MolBNL@UniTs), DEA, University of Trieste, Trieste, Italy
| | - Suzana Aulic
- Molecular Biology and Nanotechnology Laboratory (MolBNL@UniTs), DEA, University of Trieste, Trieste, Italy
| | - Maurizio Fermeglia
- Molecular Biology and Nanotechnology Laboratory (MolBNL@UniTs), DEA, University of Trieste, Trieste, Italy
| | - Erik Laurini
- Molecular Biology and Nanotechnology Laboratory (MolBNL@UniTs), DEA, University of Trieste, Trieste, Italy
| | - Sabrina Pricl
- Molecular Biology and Nanotechnology Laboratory (MolBNL@UniTs), DEA, University of Trieste, Trieste, Italy; Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland.
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14
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The BRCA1/BARD1 ubiquitin ligase and its substrates. Biochem J 2021; 478:3467-3483. [PMID: 34591954 DOI: 10.1042/bcj20200864] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 12/19/2022]
Abstract
Mutations in breast cancer type 1 susceptibility protein (BRCA1) and its heterodimeric binding partner BARD1 confer a high risk for the development of breast and ovarian cancers. The sole enzymatic function of the BRCA1/BARD1 complex is as a RING-type E3 ubiquitin (Ub) ligase, leading to the deposition of Ub signals onto a variety of substrate proteins. Distinct types of Ub signals deposited by BRCA1/BARD1 (i.e. degradative vs. non-degradative; mono-Ub vs. poly-Ub chains) on substrate proteins mediate aspects of its function in DNA double-stranded break repair, cell-cycle regulation, and transcriptional regulation. While cancer-predisposing mutations in both subunits lead to the inactivation of BRCA1/BARD1 ligase activity, controversy remains as to whether its Ub ligase activity directly inhibits tumorigenesis. Investigation of BRCA1/BARD1 substrates using rigorous, well-validated mutants and experimental systems will ultimately clarify the role of its ligase activity in cancer and possibly establish prognostic and diagnostic metrics for patients with mutations. In this review, we discuss the Ub ligase function of BRCA1/BARD1, highlighting experimental approaches, mechanistic considerations, and reagents that are useful in the study of substrate ubiquitylation. We also discuss the current understanding of two well-established BRCA1/BARD1 substrates (nucleosomal H2A and estrogen receptor α) and several recently discovered substrates (p50, NF2, Oct1, and LARP7). Lessons from the current body of work should provide a road map to researchers examining novel substrates and biological functions attributed to BRCA1/BARD1 Ub ligase activity.
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15
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Esfandiari Nazzaro E, Sabei FY, Vogel WK, Nazari M, Nicholson KS, Gafken PR, Taratula O, Taratula O, Davare MA, Leid M. Discovery and Validation of a Compound to Target Ewing's Sarcoma. Pharmaceutics 2021; 13:pharmaceutics13101553. [PMID: 34683845 PMCID: PMC8538197 DOI: 10.3390/pharmaceutics13101553] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/10/2021] [Accepted: 09/15/2021] [Indexed: 12/28/2022] Open
Abstract
Ewing’s sarcoma, characterized by pathognomonic t (11; 22) (q24; q12) and related chromosomal ETS family translocations, is a rare aggressive cancer of bone and soft tissue. Current protocols that include cytotoxic chemotherapeutic agents effectively treat localized disease; however, these aggressive therapies may result in treatment-related morbidities including second-site cancers in survivors. Moreover, the five-year survival rate in patients with relapsed, recurrent, or metastatic disease is less than 30%, despite intensive therapy with these cytotoxic agents. By using high-throughput phenotypic screening of small molecule libraries, we identified a previously uncharacterized compound (ML111) that inhibited in vitro proliferation of six established Ewing’s sarcoma cell lines with nanomolar potency. Proteomic studies show that ML111 treatment induced prometaphase arrest followed by rapid caspase-dependent apoptotic cell death in Ewing’s sarcoma cell lines. ML111, delivered via methoxypoly(ethylene glycol)-polycaprolactone copolymer nanoparticles, induced dose-dependent inhibition of Ewing’s sarcoma tumor growth in a murine xenograft model and invoked prometaphase arrest in vivo, consistent with in vitro data. These results suggest that ML111 represents a promising new drug lead for further preclinical studies and is a potential clinical development for the treatment of Ewing’s sarcoma.
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Affiliation(s)
- Ellie Esfandiari Nazzaro
- Departments of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA; (E.E.N.); (F.Y.S.); (W.K.V.); (M.N.); (O.T.); (M.L.)
| | - Fahad Y. Sabei
- Departments of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA; (E.E.N.); (F.Y.S.); (W.K.V.); (M.N.); (O.T.); (M.L.)
- Department of Pharmaceutics, College of Pharmacy, Jazan University, Jazan 88723, Saudi Arabia
| | - Walter K. Vogel
- Departments of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA; (E.E.N.); (F.Y.S.); (W.K.V.); (M.N.); (O.T.); (M.L.)
| | - Mohamad Nazari
- Departments of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA; (E.E.N.); (F.Y.S.); (W.K.V.); (M.N.); (O.T.); (M.L.)
| | - Katelyn S. Nicholson
- Division of Pediatric Hematology & Oncology, Department of Pediatrics, Oregon Health & Science University, Portland, OR 97239, USA;
| | - Philip R. Gafken
- Proteomics & Metabolomics Shared Resource, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA;
| | - Olena Taratula
- Departments of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA; (E.E.N.); (F.Y.S.); (W.K.V.); (M.N.); (O.T.); (M.L.)
| | - Oleh Taratula
- Departments of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA; (E.E.N.); (F.Y.S.); (W.K.V.); (M.N.); (O.T.); (M.L.)
- Correspondence: (O.T.); (M.A.D.)
| | - Monika A. Davare
- Division of Pediatric Hematology & Oncology, Department of Pediatrics, Oregon Health & Science University, Portland, OR 97239, USA;
- Papé Pediatric Research Institute, Oregon Health & Science University, Portland, OR 97239, USA
- Correspondence: (O.T.); (M.A.D.)
| | - Mark Leid
- Departments of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA; (E.E.N.); (F.Y.S.); (W.K.V.); (M.N.); (O.T.); (M.L.)
- Department of Integrative Biosciences, Oregon Health & Science University, Portland, OR 97239, USA
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16
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Lin A, Feng J, Chen X, Wang D, Wong M, Zhang G, Na J, Zhang T, Chen Z, Chen YT, Nancy Du YC. High levels of truncated RHAMM cooperate with dysfunctional p53 to accelerate the progression of pancreatic cancer. Cancer Lett 2021; 514:79-89. [PMID: 34044069 PMCID: PMC8235875 DOI: 10.1016/j.canlet.2021.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/19/2021] [Accepted: 05/06/2021] [Indexed: 12/13/2022]
Abstract
Pancreatic cancer has the lowest survival rate out of all types of cancer. Pancreatic cancer patients are often diagnosed at advanced stages, hence an urgent need for a better therapeutic development of this devastating disease. Receptor for hyaluronan-mediated motility (RHAMM), not expressed in adult normal pancreas, has been suggested as a prognostic factor and a potential therapeutic target for pancreatic ductal adenocarcinoma (PDAC) and pancreatic neuroendocrine tumor (PNET). In this study, we initially sought to determine whether genetic deletion of RHAMM would slow down pancreatic cancer progression using Rhamm-/- mice. However, we found that Rhamm-/- mice expressed a truncated HMMRΔexon8-16 protein at higher abundance levels than wild-type RHAMM. While HMMRΔexon8-16 did not enable malignant progression of pancreatic intraepithelial neoplasia in p48-Cre; LSL-KRASG12D mice, it accelerated the formation of invasive PDAC and shortened the survival of p48-Cre; LSL-KRASG12D mice with heterozygous p53 knockout. KrasG12D PDAC mice with homozygous p53 knockout mice died around 10 weeks, and the effect of HMMRΔexon8-16 was not apparent in these short lifespan mice. In addition, HMMRΔexon8-16 shortened the survival of PNET-bearing RIP-Tag mice, which had inactivated p53. In our analysis of TCGA dataset, pancreatic cancer patients with mutant TP53 or loss of one copy of TP53 had higher RHAMM expression, which, combined, predicted worse outcomes. Taken together, by collaborating with dysfunctional p53, high levels of HMMRΔexon8-16 , which lacks the centrosome targeting domain and degrons for interaction with the Anaphase-Promoting Complex (APC), accelerated pancreatic cancer progression.
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Affiliation(s)
- Anthony Lin
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Jennifer Feng
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Xiang Chen
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Dunrui Wang
- Laboratory of Cellular Oncology, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Megan Wong
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, 10065, USA
| | - George Zhang
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Joseph Na
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Tiantian Zhang
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Zhengming Chen
- Division of Biostatistics and Epidemiology, Department of Population Health Sciences, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Yao-Tseng Chen
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Yi-Chieh Nancy Du
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, 10065, USA.
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17
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Fukumoto Y, Ikeuchi M, Qu L, Hoshino T, Yamaguchi N, Nakayama Y, Ogra Y. Nuclear translocation promotes proteasomal degradation of human Rad17 protein through the N-terminal destruction boxes. J Biol Chem 2021; 297:100831. [PMID: 34174284 PMCID: PMC8318897 DOI: 10.1016/j.jbc.2021.100831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/17/2021] [Accepted: 05/24/2021] [Indexed: 12/15/2022] Open
Abstract
The ATR pathway is one of the major DNA damage checkpoints, and Rad17 is a DNA-binding protein that is phosphorylated upon DNA damage by ATR kinase. Rad17 recruits the 9-1-1 complex that mediates the checkpoint activation, and proteasomal degradation of Rad17 is important for recovery from the ATR pathway. Here, we identified several Rad17 mutants deficient in nuclear localization and resistant to proteasomal degradation. The nuclear localization signal was identified in the central basic domain of Rad17. Rad17 Δ230–270 and R240A/L243A mutants that were previously postulated to lack the destruction box, a sequence that is recognized by the ubiquitin ligase/anaphase-promoting complex that mediates degradation of Rad17, also showed cytoplasmic localization. Our data indicate that the nuclear translocation of Rad17 is functionally linked to the proteasomal degradation. The ATP-binding activity of Rad17, but not hydrolysis, is essential for the nuclear translocation, and the ATPase domain orchestrates the nuclear translocation, the proteasomal degradation, as well as the interaction with the 9-1-1 complex. The Rad17 mutant that lacked a nuclear localization signal was proficient in the interaction with the 9-1-1 complex, suggesting cytosolic association of Rad17 and the 9-1-1 complex. Finally, we identified two tandem canonical and noncanonical destruction boxes in the N-terminus of Rad17 as the bona fide destruction box, supporting the role of anaphase-promoting complex in the degradation of Rad17. We propose a model in which Rad17 is activated in the cytoplasm for translocation into the nucleus and continuously degraded in the nucleus even in the absence of exogenous DNA damage.
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Affiliation(s)
- Yasunori Fukumoto
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan.
| | - Masayoshi Ikeuchi
- Department of Biochemistry & Molecular Biology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Liang Qu
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Tyuji Hoshino
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Naoto Yamaguchi
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Yuji Nakayama
- Department of Biochemistry & Molecular Biology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Yasumitsu Ogra
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
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18
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Vriend J, Nachtigal MW. Ubiquitin Proteasome Pathway Transcriptome in Epithelial Ovarian Cancer. Cancers (Basel) 2021; 13:cancers13112659. [PMID: 34071321 PMCID: PMC8198060 DOI: 10.3390/cancers13112659] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 05/22/2021] [Accepted: 05/24/2021] [Indexed: 12/26/2022] Open
Abstract
In this article, we reviewed the transcription of genes coding for components of the ubiquitin proteasome pathway in publicly available datasets of epithelial ovarian cancer (EOC). KEGG analysis was used to identify the major pathways distinguishing EOC of low malignant potential (LMP) from invasive high-grade serous ovarian carcinomas (HGSOC), and to identify the components of the ubiquitin proteasome system that contributed to these pathways. We identified elevated transcription of several genes encoding ubiquitin conjugases associated with HGSOC. Fifty-eight genes coding for ubiquitin ligases and more than 100 genes encoding ubiquitin ligase adaptors that were differentially expressed between LMP and HGSOC were also identified. Many differentially expressed genes encoding E3 ligase adaptors were Cullin Ring Ligase (CRL) adaptors, and 64 of them belonged to the Cullin 4 DCX/DWD family of CRLs. The data suggest that CRLs play a role in HGSOC and that some of these proteins may be novel therapeutic targets. Differential expression of genes encoding deubiquitinases and proteasome subunits was also noted.
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Affiliation(s)
- Jerry Vriend
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Correspondence: ; Tel.: +1-204-789-3732
| | - Mark W. Nachtigal
- Department of Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada;
- Department of Obstetrics, Gynecology & Reproductive Sciences, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- CancerCare Manitoba Research Institute, Winnipeg, MB R3E 0V9, Canada
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19
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Patil AR, Leung MY, Roy S. Identification of Hub Genes in Different Stages of Colorectal Cancer through an Integrated Bioinformatics Approach. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:5564. [PMID: 34070979 PMCID: PMC8197092 DOI: 10.3390/ijerph18115564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 11/16/2022]
Abstract
Colorectal cancer (CRC) is the third most common cancer that contributes to cancer-related morbidity. However, the differential expression of genes in different phases of CRC is largely unknown. Moreover, very little is known about the role of stress-survival pathways in CRC. We sought to discover the hub genes and identify their roles in several key pathways, including oxidative stress and apoptosis in the different stages of CRC. To identify the hub genes that may be involved in the different stages of CRC, gene expression datasets were obtained from the gene expression omnibus (GEO) database. The differentially expressed genes (DEGs) common among the different datasets for each group were obtained using the robust rank aggregation method. Then, gene enrichment analysis was carried out with Gene Ontology and Kyoto Encyclopedia of Genes and Genomes databases. Finally, the protein-protein interaction networks were constructed using the Cytoscape software. We identified 40 hub genes and performed enrichment analysis for each group. We also used the Oncomine database to identify the DEGs related to stress-survival and apoptosis pathways involved in different stages of CRC. In conclusion, the hub genes were found to be enriched in several key pathways, including the cell cycle and p53 signaling pathway. Some of the hub genes were also reported in the stress-survival and apoptosis pathways. The hub DEGs revealed from our study may be used as biomarkers and may explain CRC development and progression mechanisms.
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Affiliation(s)
- Abhijeet R. Patil
- Computational Science Program, The University of Texas at El Paso, El Paso, TX 79968, USA; (A.R.P.); (M.-Y.L.)
| | - Ming-Ying Leung
- Computational Science Program, The University of Texas at El Paso, El Paso, TX 79968, USA; (A.R.P.); (M.-Y.L.)
- Border Biomedical Research Center, The University of Texas at El Paso, El Paso, TX 79968, USA
- Department of Mathematical Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Sourav Roy
- Border Biomedical Research Center, The University of Texas at El Paso, El Paso, TX 79968, USA
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA
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20
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Jiang Z, Zhang S, Lee YM, Teng X, Yang Q, Toyama Y, Liou YC. Hyaluronan-Mediated Motility Receptor Governs Chromosome Segregation by Regulating Microtubules Sliding Within the Bridging Fiber. Adv Biol (Weinh) 2021; 5:e2000493. [PMID: 33788418 DOI: 10.1002/adbi.202000493] [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: 11/02/2020] [Revised: 02/20/2021] [Indexed: 11/06/2022]
Abstract
Accurate segregation of chromosomes during anaphase relies on the central spindle and its regulators. A newly raised concept of the central spindle, the bridging fiber, shows that sliding of antiparallel microtubules (MTs) within the bridging fiber promotes chromosome segregation. However, the regulators of the bridging fiber and its regulatory mechanism on MTs sliding remain largely unknown. In this study, the non-motor microtubule-associated protein, hyaluronan-mediated motility receptor (HMMR), is identified as a novel regulator of the bridging fiber. It then identifies that HMMR regulates MTs sliding within the bridging fiber by cooperating with its binding partner HSET. By utilizing a laser-based cell ablation system and photoactivation approach, the study's results reveal that depletion of HMMR causes an inhibitory effect on MTs sliding within the bridging fiber and disrupts the forced uniformity on the kinetochore-attached microtubules-formed fibers (k-fibers). These are created by suppressing the dynamics of HSET, which functions in transiting the force from sliding of bridging MTs to the k-fiber. This study sheds new light on the novel regulatory mechanism of MTs sliding within the bridging fiber by HMMR and HSET and uncovers the role of HMMR in chromosome segregation during anaphase.
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Affiliation(s)
- Zemin Jiang
- Laboratory of Precision Cancer Medicine, Genome Institute of Singapore (GIS), Agency for Science, Technology and Research (A*STAR), 60 Biopolis Street, #02-01 Genome, Singapore, 138672, Singapore.,Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543, Singapore
| | - Shiyu Zhang
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543, Singapore
| | - Yew Mun Lee
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543, Singapore
| | - Xiang Teng
- Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Qiaoyun Yang
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543, Singapore
| | - Yusuke Toyama
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543, Singapore.,Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Yih-Cherng Liou
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543, Singapore.,Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, 117573, Singapore
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21
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Minten EV, Kapoor-Vazirani P, Li C, Zhang H, Balakrishnan K, Yu DS. SIRT2 promotes BRCA1-BARD1 heterodimerization through deacetylation. Cell Rep 2021; 34:108921. [PMID: 33789098 PMCID: PMC8108010 DOI: 10.1016/j.celrep.2021.108921] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 02/08/2021] [Accepted: 03/09/2021] [Indexed: 01/04/2023] Open
Abstract
The breast cancer type I susceptibility protein (BRCA1) and BRCA1-associated RING domain protein I (BARD1) heterodimer promote genome integrity through pleiotropic functions, including DNA double-strand break (DSB) repair by homologous recombination (HR). BRCA1-BARD1 heterodimerization is required for their mutual stability, HR function, and role in tumor suppression; however, the upstream signaling events governing BRCA1-BARD1 heterodimerization are unclear. Here, we show that SIRT2, a sirtuin deacetylase and breast tumor suppressor, promotes BRCA1-BARD1 heterodimerization through deacetylation. SIRT2 complexes with BRCA1-BARD1 and deacetylates conserved lysines in the BARD1 RING domain, interfacing BRCA1, which promotes BRCA1-BARD1 heterodimerization and consequently BRCA1-BARD1 stability, nuclear retention, and localization to DNA damage sites, thus contributing to efficient HR. Our findings define a mechanism for regulation of BRCA1-BARD1 heterodimerization through SIRT2 deacetylation, elucidating a critical upstream signaling event directing BRCA1-BARD1 heterodimerization, which facilitates HR and tumor suppression, and delineating a role for SIRT2 in directing DSB repair by HR. Minten et al. show that SIRT2, a sirtuin deacetylase and tumor suppressor protein, promotes BRCA1-BARD1 heterodimerization through deacetylation of BARD1 at conserved lysines within its RING domain. These findings elucidate a critical upstream signaling event directing BRCA1-BARD1 heterodimerization, which facilitates HR and tumor suppression.
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Affiliation(s)
- Elizabeth V Minten
- Department of Radiation Oncology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Priya Kapoor-Vazirani
- Department of Radiation Oncology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Chunyang Li
- Department of Radiation Oncology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Hui Zhang
- Department of Radiation Oncology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Kamakshi Balakrishnan
- Department of Radiation Oncology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - David S Yu
- Department of Radiation Oncology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA 30322, USA.
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22
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De Munter S, Van der Hoeven G, Bollen M. RepoMan stimulates the chromosome-dependent pathway of microtubule assembly. Cell Cycle 2020; 19:3029-3041. [PMID: 33054506 PMCID: PMC7747800 DOI: 10.1080/15384101.2020.1830607] [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: 01/23/2020] [Revised: 07/28/2020] [Accepted: 08/25/2020] [Indexed: 10/23/2022] Open
Abstract
RepoMan is a chromosome-associated scaffold protein that integrates signaling of multiple kinases and phosphatases to coordinate spindle-kinetochore interactions, chromosome (de)condensation and nuclear envelope (dis)assembly during mitosis. Another key mitotic event is the assembly of a microtubule-based spindle, which involves redundant pathways emanating from the centrosomes, microtubules and chromosomes. Here we describe a novel mitotic function of RepoMan in regulating chromosome-dependent microtubule assembly. At limiting concentrations of microtubule-destabilizing agents, RepoMan-depleted cells showed enhanced chromosome clustering. This clustering was completely dependent on the partial inhibition of microtubule growth originating from the chromosome-dependent pathway. We also demonstrated that RepoMan interacts with prime regulators of the chromosome-dependent spindle assembly such as NuSAP1, NuMA, and TPX2. In addition, RepoMan was required to enable or maintain phosphorylation of NuSAP1 at CDK sites, thereby enabling activation of NuSAP1 through dissociation of inhibitory importin β/7. Our data identify RepoMan as an enhancer of microtubule assembly at chromosomes.
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Affiliation(s)
- Sofie De Munter
- Department of Cellular and Molecular Medicine, Laboratory of Biosignaling & Therapeutics, KU Leuven, Leuven, Belgium
| | - Gerd Van der Hoeven
- Department of Cellular and Molecular Medicine, Laboratory of Biosignaling & Therapeutics, KU Leuven, Leuven, Belgium
| | - Mathieu Bollen
- Department of Cellular and Molecular Medicine, Laboratory of Biosignaling & Therapeutics, KU Leuven, Leuven, Belgium
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23
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Manohar S, Yu Q, Gygi SP, King RW. The Insulin Receptor Adaptor IRS2 is an APC/C Substrate That Promotes Cell Cycle Protein Expression and a Robust Spindle Assembly Checkpoint. Mol Cell Proteomics 2020; 19:1450-1467. [PMID: 32554797 PMCID: PMC8143631 DOI: 10.1074/mcp.ra120.002069] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 06/01/2020] [Indexed: 01/21/2023] Open
Abstract
Insulin receptor substrate 2 (IRS2) is an essential adaptor that mediates signaling downstream of the insulin receptor and other receptor tyrosine kinases. Transduction through IRS2-dependent pathways is important for coordinating metabolic homeostasis, and dysregulation of IRS2 causes systemic insulin signaling defects. Despite the importance of maintaining proper IRS2 abundance, little is known about what factors mediate its protein stability. We conducted an unbiased proteomic screen to uncover novel substrates of the Anaphase Promoting Complex/Cyclosome (APC/C), a ubiquitin ligase that controls the abundance of key cell cycle regulators. We found that IRS2 levels are regulated by APC/C activity and that IRS2 is a direct APC/C target in G1 Consistent with the APC/C's role in degrading cell cycle regulators, quantitative proteomic analysis of IRS2-null cells revealed a deficiency in proteins involved in cell cycle progression. We further show that cells lacking IRS2 display a weakened spindle assembly checkpoint in cells treated with microtubule inhibitors. Together, these findings reveal a new pathway for IRS2 turnover and indicate that IRS2 is a component of the cell cycle control system in addition to acting as an essential metabolic regulator.
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Affiliation(s)
- Sandhya Manohar
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts, USA
| | - Qing Yu
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts, USA
| | - Steven P Gygi
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts, USA
| | - Randall W King
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts, USA.
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24
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Emanuele MJ, Enrico TP, Mouery RD, Wasserman D, Nachum S, Tzur A. Complex Cartography: Regulation of E2F Transcription Factors by Cyclin F and Ubiquitin. Trends Cell Biol 2020; 30:640-652. [PMID: 32513610 PMCID: PMC7859860 DOI: 10.1016/j.tcb.2020.05.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/01/2020] [Accepted: 05/06/2020] [Indexed: 02/07/2023]
Abstract
The E2F family of transcriptional regulators sits at the center of cell cycle gene expression and plays vital roles in normal and cancer cell cycles. Whereas control of E2Fs by the retinoblastoma family of proteins is well established, much less is known about their regulation by ubiquitin pathways. Recent studies placed the Skp1-Cul1-F-box-protein (SCF) family of E3 ubiquitin ligases with the F-box protein Cyclin F at the center of E2F regulation, demonstrating temporal proteolysis of both activator and atypical repressor E2Fs. Importantly, these E2F members, in particular activator E2F1 and repressors E2F7 and E2F8, form a feedback circuit at the crossroads of cell cycle and cell death. Moreover, Cyclin F functions in a reciprocal circuit with the cell cycle E3 ligase anaphase-promoting complex/cyclosome (APC/C), which also controls E2F7 and E2F8. This review focuses on the complex contours of feedback within this circuit, highlighting the deep crosstalk between E2F, SCF-Cyclin F, and APC/C in regulating the oscillator underlying human cell cycles.
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Affiliation(s)
- Michael J Emanuele
- Department of Pharmacology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
| | - Taylor P Enrico
- Department of Pharmacology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Ryan D Mouery
- Department of Pharmacology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Genetics and Molecular Biology Program, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Danit Wasserman
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Sapir Nachum
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Amit Tzur
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel.
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25
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He Z, Mei L, Connell M, Maxwell CA. Hyaluronan Mediated Motility Receptor (HMMR) Encodes an Evolutionarily Conserved Homeostasis, Mitosis, and Meiosis Regulator Rather than a Hyaluronan Receptor. Cells 2020; 9:cells9040819. [PMID: 32231069 PMCID: PMC7226759 DOI: 10.3390/cells9040819] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 12/21/2022] Open
Abstract
Hyaluronan is an extracellular matrix component that absorbs water in tissues and engages cell surface receptors, like Cluster of Differentiation 44 (CD44), to promote cellular growth and movement. Consequently, CD44 demarks stem cells in normal tissues and tumor-initiating cells isolated from neoplastic tissues. Hyaluronan mediated motility receptor (HMMR, also known as RHAMM) is another one of few defined hyaluronan receptors. HMMR is also associated with neoplastic processes and its role in cancer progression is often attributed to hyaluronan-mediated signaling. But, HMMR is an intracellular, microtubule-associated, spindle assembly factor that localizes protein complexes to augment the activities of mitotic kinases, like polo-like kinase 1 and Aurora kinase A, and control dynein and kinesin motor activities. Expression of HMMR is elevated in cells prior to and during mitosis and tissues with detectable HMMR expression tend to be highly proliferative, including neoplastic tissues. Moreover, HMMR is a breast cancer susceptibility gene product. Here, we briefly review the associations between HMMR and tumorigenesis as well as the structure and evolution of HMMR, which identifies Hmmr-like gene products in several insect species that do not produce hyaluronan. This review supports the designation of HMMR as a homeostasis, mitosis, and meiosis regulator, and clarifies how its dysfunction may promote the tumorigenic process and cancer progression.
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Affiliation(s)
- Zhengcheng He
- Department of Pediatrics, University of British Columbia, Vancouver, BC V5Z 4H4, Canada; (Z.H.); (L.M.); (M.C.)
| | - Lin Mei
- Department of Pediatrics, University of British Columbia, Vancouver, BC V5Z 4H4, Canada; (Z.H.); (L.M.); (M.C.)
| | - Marisa Connell
- Department of Pediatrics, University of British Columbia, Vancouver, BC V5Z 4H4, Canada; (Z.H.); (L.M.); (M.C.)
| | - Christopher A. Maxwell
- Department of Pediatrics, University of British Columbia, Vancouver, BC V5Z 4H4, Canada; (Z.H.); (L.M.); (M.C.)
- Michael Cuccione Childhood Cancer Research Program, BC Children’s Hospital, Vancouver, BC V5Z 4H4, Canada
- Correspondence: ; Tel.: +1-6048752000 (ext. 4691)
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26
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Ding X, Duan H, Luo H. Identification of Core Gene Expression Signature and Key Pathways in Colorectal Cancer. Front Genet 2020; 11:45. [PMID: 32153633 PMCID: PMC7046836 DOI: 10.3389/fgene.2020.00045] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 01/15/2020] [Indexed: 12/17/2022] Open
Abstract
Objective Colorectal cancer (CRC) is considered the most prevalent malignant tumor that contributes to high cancer-related mortality. However, the signaling pathways involved in CRC and CRC-driven genes are largely unknown. We sought to discover a novel biomarker in CRC. Materials and Methods All clinical CRC samples (n = 20) were from Renmin Hospital of Wuhan University. We first selected MAD2L1 by integrated bioinformatics analysis of a GSE dataset. Next, the expression of MAD2L1 in tissues and cell lines was verified by quantitative real-time PCR. The effects of MAD2L1 on cell growth, proliferation, the cell cycle, and apoptosis were examined by in vitro assays. Results We identified 683 shared DEGs (420 upregulated and 263 downregulated), and the top twenty genes (CDK1, CCNA2, TOP2A, PLK1, MAD2L1, AURKA, BUB1B, UBE2C, TPX2, RRM2, KIF11, NCAPG, MELK, NUSAP1, MCM4, RFC4, PTTG1, CHEK1, CEP55, DTL) were selected by integrated analysis. These hub genes were significantly overexpressed in CRC samples and were positively correlated. Our data revealed that the expression of MAD2L1 in CRC tissues is higher than that in normal tissues. MAD2L1 knockdown significantly suppressed CRC cell growth by impairing cell cycle progression and inducing cell apoptosis. Conclusion MAD2L1, as a novel oncogenic gene, plays a role in regulating cancer cell growth and apoptosis and could be used as a new biomarker for diagnosis and therapy in CRC.
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Affiliation(s)
- Xiang Ding
- Department of Gastroenterology, Renmin Hospital, Wuhan University, Wuhan, China
| | - Houyu Duan
- Department of Gastroenterology, Renmin Hospital, Wuhan University, Wuhan, China
| | - Hesheng Luo
- Department of Gastroenterology, Renmin Hospital, Wuhan University, Wuhan, China
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27
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Chen Y, Zhang W, Kadier A, Zhang H, Yao X. MicroRNA-769-5p suppresses cell growth and migration via targeting NUSAP1 in bladder cancer. J Clin Lab Anal 2020; 34:e23193. [PMID: 31901150 PMCID: PMC7246360 DOI: 10.1002/jcla.23193] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 11/16/2019] [Accepted: 12/11/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Nucleolar and spindle-associated protein 1 (NUSAP1) has been identified to be strongly implicated in the carcinogenesis of cervical carcinoma, breast cancer, and liver cancer, and shows a high expression level in bladder cancer, indicating that NUSAP1 might be a potent target for cancer treatment. Using bioinformatics methods, we found that NUSAP1 was a putative target of miR-769-5p. Here, we aimed to explore whether miR-769-5p is involved in bladder cancer progression via targeting NUSAP1. METHODS MiR-769-5p expression patterns in bladder cancer tissues and cells were detected by RT-PCR. Kaplan-Meier was used to determine the clinical effects of miR-769-5p expression levels on the overall survival of bladder cancer patients. Bioinformatics methods were used to predict the binding sites between miR-769-5p and NUSAP1, which was verified by the luciferase gene reporter assay. CCK-8, flow cytometry, wound healing and transwell chamber experiments were performed to test cell growth, apoptosis, migration and invasion capacities. RESULTS miR-769-5p was lowly expressed in bladder cancer tissues and cells, which was closely associated with poor prognosis. Overexpression of miR-769-5p induced significant repressions in cell growth, migration, and invasion and caused an obvious increase in cell apoptosis, whereas these tendencies were reversed when NUSAP1 was upregulated. CONCLUSION This study demonstrates that miR-769-5p functions as a tumor suppressor in bladder cancer via targeting NUSAP1.
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Affiliation(s)
- Yifan Chen
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
| | - Wentao Zhang
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
| | - Aimaitiaji Kadier
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
| | - Haimin Zhang
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
| | - Xudong Yao
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
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28
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Holder J, Poser E, Barr FA. Getting out of mitosis: spatial and temporal control of mitotic exit and cytokinesis by PP1 and PP2A. FEBS Lett 2019; 593:2908-2924. [PMID: 31494926 DOI: 10.1002/1873-3468.13595] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 07/31/2019] [Accepted: 08/19/2019] [Indexed: 12/11/2022]
Abstract
Here, we will review the evidence showing that mitotic exit is initiated by regulated proteolysis and then driven by the PPP family of phosphoserine/threonine phosphatases. Rapid APC/CCDC20 and ubiquitin-dependent proteolysis of cyclin B and securin initiates sister chromatid separation, the first step of mitotic exit. Because proteolysis of Aurora and Polo family kinases dependent on APC/CCDH1 is relatively slow, this creates a new regulatory state, anaphase, different to G2 and M-phase. We will discuss how the CDK1-counteracting phosphatases PP1 and PP2A-B55, together with Aurora and Polo kinases, contribute to the temporal regulation and order of events in the different stages of mitotic exit from anaphase to cytokinesis. For PP2A-B55, these timing properties are created by the ENSA-dependent inhibitory pathway and differential recognition of phosphoserine and phosphothreonine. Finally, we will discuss how Aurora B and PP2A-B56 are needed for the spatial regulation of anaphase spindle formation and how APC/C-dependent destruction of PLK1 acts as a timer for abscission, the final event of cytokinesis.
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Affiliation(s)
- James Holder
- Department of Biochemistry, University of Oxford, UK
| | - Elena Poser
- Department of Biochemistry, University of Oxford, UK
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29
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Verrico A, Rovella P, Di Francesco L, Damizia M, Staid DS, Le Pera L, Schininà ME, Lavia P. Importin-β/karyopherin-β1 modulates mitotic microtubule function and taxane sensitivity in cancer cells via its nucleoporin-binding region. Oncogene 2019; 39:454-468. [PMID: 31492900 DOI: 10.1038/s41388-019-0989-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 02/27/2019] [Accepted: 04/25/2019] [Indexed: 12/11/2022]
Abstract
The nuclear transport receptor importin-β/karyopherin-β1 is overexpressed in cancers that display genomic instability. It is regarded as a promising cancer target and inhibitors are being developed. In addition to its role in nucleo-cytoplasmic transport, importin-β regulates mitosis, but the programmes and pathways in which it operates are defined only in part. To unravel importin-β's mitotic functions we have developed cell lines expressing either wild-type or a mutant importin-β form in characterised residues required for nucleoporin binding. Both forms similarly disrupted spindle pole organisation, while only wild-type importin-β affected microtubule plus-end function and microtubule stability. A proteome-wide search for differential interactors identified a set of spindle regulators sensitive to mutations in the nucleoporin-binding region. Among those, HURP (hepatoma up-regulated protein) is an importin-β interactor and a microtubule-stabilising factor. We found that induction of wild type, but not mutant importin-β, under the same conditions that destabilise mitotic microtubules, delocalised HURP, indicating that the spatial distribution of HURP along the spindle requires importin-β's nucleoporin-binding residues. Concomitantly, importin-β overexpression sensitises cells to taxanes and synergistically increases mitotic cell death. Thus, the nucleoporin-binding domain is dispensable for importin-β function in spindle pole organisation, but regulates microtubule stability, at least in part via HURP, and renders cells vulnerable to certain microtubule-targeting drugs.
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Affiliation(s)
- Annalisa Verrico
- Institute of Molecular Biology and Pathology (IBPM), CNR Consiglio Nazionale delle Ricerche, 00185, Rome, Italy.,Institut Jacques Monod, UMR7592 CNRS-Université Paris Diderot, Sorbonne Paris Cité, F-75205, Paris, France
| | - Paola Rovella
- Institute of Molecular Biology and Pathology (IBPM), CNR Consiglio Nazionale delle Ricerche, 00185, Rome, Italy
| | - Laura Di Francesco
- Department of Biochemical Sciences "Alessandro Rossi-Fanelli", Sapienza University of Rome, 00185, Rome, Italy
| | - Michela Damizia
- Institute of Molecular Biology and Pathology (IBPM), CNR Consiglio Nazionale delle Ricerche, 00185, Rome, Italy.,Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, 00185, Rome, Italy
| | - David Sasah Staid
- Institute of Molecular Biology and Pathology (IBPM), CNR Consiglio Nazionale delle Ricerche, 00185, Rome, Italy.,Department of Biochemical Sciences "Alessandro Rossi-Fanelli", Sapienza University of Rome, 00185, Rome, Italy
| | - Loredana Le Pera
- Institute of Molecular Biology and Pathology (IBPM), CNR Consiglio Nazionale delle Ricerche, 00185, Rome, Italy.,Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies (IBIOM), CNR Consiglio Nazionale delle Ricerche, 70126, Bari, Italy
| | - M Eugenia Schininà
- Department of Biochemical Sciences "Alessandro Rossi-Fanelli", Sapienza University of Rome, 00185, Rome, Italy
| | - Patrizia Lavia
- Institute of Molecular Biology and Pathology (IBPM), CNR Consiglio Nazionale delle Ricerche, 00185, Rome, Italy. .,Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, 00185, Rome, Italy.
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30
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Vriend J, Tate RB. Differential Expression of Genes for Ubiquitin Ligases in Medulloblastoma Subtypes. THE CEREBELLUM 2019; 18:469-488. [PMID: 30810905 DOI: 10.1007/s12311-019-1009-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Using publically available datasets on gene expression in medulloblastoma (MB) subtypes, we selected genes for ubiquitin ligases and identified statistically those that best predicted each of the four major MB subgroups as separate disease entities. We identify a gene coding for an ubiquitin ligase, ZNRF3, whose overexpression alone can predict the WNT subgroup for 100% in the Pfister dataset. For the SHH subgroup, we identify a gene for a regulatory subunit of the protein phosphatase 2A (PP2A), PPP2R2C, as the major predictor among the E3 ligases genes. The ubiquitin and ubiquitin-like conjugation database (UUCD) lists PPP2R2C as coding for a Cullin Ring ubiquitin ligase adaptor. For group 3 MBs, the best ubiquitin ligase predictor was PPP2R2B, a gene which codes for another regulatory subunit of the PP2A holoenzyme. For group 4, the best E3 gene predictors were MID2, ZBTB18, and PPP2R2A, which codes for a third PP2A regulatory subunit. Heatmap analysis of the E3 gene data shows that expression of ten genes for ubiquitin ligases can be used to classify MBs into the four major consensus subgroups. This was illustrated by analysis of gene expression of ubiquitin ligases of the Pfister dataset and confirmed in the dataset of Cavalli. We conclude that genes for ubiquitin ligases can be used as genetic markers for MB subtypes and that the proteins coded for by these genes should be investigated as subtype specific therapeutic targets for MB.
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Affiliation(s)
- Jerry Vriend
- Department of Human Anatomy & Cell Science, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Rm134, BMSB, 745 Bannatyne Avenue, Winnipeg, Manitoba, R3E 0J9, Canada.
| | - Robert B Tate
- Department of Community Health Sciences, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
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Chu Z, Zhang X, Li Q, Hu G, Lian CG, Geng S. CDC20 contributes to the development of human cutaneous squamous cell carcinoma through the Wnt/β‑catenin signaling pathway. Int J Oncol 2019; 54:1534-1544. [PMID: 30816486 PMCID: PMC6438437 DOI: 10.3892/ijo.2019.4727] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 01/04/2019] [Indexed: 12/15/2022] Open
Abstract
Cell division cycle 20 (CDC20) is a regulatory molecule and serves critical roles at multiple points of the cell cycle. Recent evidence indicates that CDC20 may serve an oncogenic role in a number of human cancer types. However, the role of CDC20 in primary cutaneous squamous cell carcinoma (cSCC) has not been studied, to the best of our knowledge. The aim of the present study was to investigate whether and how CDC20 is involved in the tumorigenesis of cSCC. The results revealed that CDC20 expression was significantly increased in cSCC tissues and cell lines, and its expression was associated with pathological differentiation. Downregulation of CDC20 inhibited cell proliferation, induced cell cycle arrest, promoted apoptosis and reduced migratory ability through inhibition of the Wnt/β-catenin signaling pathway. Furthermore, all-trans-retinoic acid treatment significantly downregulated CDC20 expression in cSCC. The present results revealed that CDC20 may serve a crucial role in human cSCC, and suggested that CDC20 may be a novel biomarker for the prevention, diagnosis and treatment of cSCC.
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Affiliation(s)
- Zhaowei Chu
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Xinyue Zhang
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Qingyan Li
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Guanglei Hu
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Christine Guo Lian
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Songmei Geng
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
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Curtis NL, Bolanos-Garcia VM. The Anaphase Promoting Complex/Cyclosome (APC/C): A Versatile E3 Ubiquitin Ligase. Subcell Biochem 2019; 93:539-623. [PMID: 31939164 DOI: 10.1007/978-3-030-28151-9_18] [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] [Indexed: 03/25/2023]
Abstract
In the present chapter we discuss the essential roles of the human E3 ubiquitin ligase Anaphase Promoting Complex/Cyclosome (APC/C) in mitosis as well as the emerging evidence of important APC/C roles in cellular processes beyond cell division control such as regulation of genomic integrity and cell differentiation of the nervous system. We consider the potential incipient role of APC/C dysregulation in the pathophysiology of the neurological disorder Alzheimer's disease (AD). We also discuss how certain Deoxyribonucleic Acid (DNA) and Ribonucleic Acid (RNA) viruses take control of the host's cell division regulatory system through harnessing APC/C ubiquitin ligase activity and hypothesise the plausible molecular mechanisms underpinning virus manipulation of the APC/C. We also examine how defects in the function of this multisubunit protein assembly drive abnormal cell proliferation and lastly argue the potential of APC/C as a promising therapeutic target for the development of innovative therapies for the treatment of chronic malignancies such as cancer.
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Affiliation(s)
- Natalie L Curtis
- Faculty of Health and Life Sciences, Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, OX3 0BP, England, UK
| | - Victor M Bolanos-Garcia
- Faculty of Health and Life Sciences, Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, OX3 0BP, England, UK.
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Roy S, Hooiveld GJ, Seehawer M, Caruso S, Heinzmann F, Schneider AT, Frank AK, Cardenas DV, Sonntag R, Luedde M, Trautwein C, Stein I, Pikarsky E, Loosen S, Tacke F, Ringelhan M, Avsaroglu SK, Goga A, Buendia MA, Vucur M, Heikenwalder M, Zucman-Rossi J, Zender L, Roderburg C, Luedde T. microRNA 193a-5p Regulates Levels of Nucleolar- and Spindle-Associated Protein 1 to Suppress Hepatocarcinogenesis. Gastroenterology 2018; 155:1951-1966.e26. [PMID: 30165047 PMCID: PMC6279541 DOI: 10.1053/j.gastro.2018.08.032] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 08/15/2018] [Accepted: 08/18/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND & AIMS We performed an integrated analysis to identify microRNAs (miRNAs) and messenger RNAs (mRNAs) with altered expression in liver tumors from 3 mouse models of hepatocellular carcinoma (HCC) and human tumor tissues. METHODS We analyzed miRNA and mRNA expression profiles of liver tissues from mice with diethylnitrosamine-induced hepatocarcinogenesis, conditional expression of lymphotoxin alpha and lymphotoxin beta, or inducible expression of a Myc transgene (Tet-O-Myc mice), as well as male C57BL/6 mice (controls). miRNA mimics were expressed and miRNAs and mRNAs were knocked down in human (Huh7, Hep3B, JHH2) hepatoma cell lines; cells were analyzed for viability, proliferation, apoptosis, migration, and invasion. Cells were grown as xenograft tumors in nude mice and analyzed. We combined in silico target gene prediction with mRNA profiles from all 3 mouse models. We quantified miRNA levels in 146 fresh-frozen tissues from patients (125 HCCs, 17 matched nontumor tissues, and 4 liver samples from patients without cancer) and published human data sets and tested correlations with patient survival times using Kaplan-Meier curves and the log-rank test. Levels of NUSAP1 mRNA were quantified in 237 HCCs and 5 nontumor liver samples using the TaqMan assay. RESULTS Levels of the miRNA 193a-5p (MIR193A-5p) were reduced in liver tumors from all 3 mouse tumor models and in human HCC samples, compared with nontumor liver tissues. Expression of a MIR193A-5p mimic in hepatoma cells reduced proliferation, survival, migration, and invasion and their growth as xenograft tumors in nude mice. We found nucleolar and spindle-associated protein 1 (NUSAP1) to be a target of MIR193A-5p; HCC cells and tissues with low levels of MIR193A-5p had increased expression of NUSAP1. Increased levels of NUSAP1 in HCC samples correlated with shorter survival times of patients. Knockdown of NUSAP1 in Huh7 cells reduced proliferation, survival, migration, and growth as xenograft tumors in nude mice. Hydrodynamic tail-vein injections of a small hairpin RNA against NUSAP1 reduced growth of Akt1-Myc-induced tumors in mice. CONCLUSIONS MIR193A-5p appears to prevent liver tumorigenesis by reducing levels of NUSAP1. Levels of MIR193A-5p are reduced in mouse and human HCC cells and tissues, leading to increased levels of NUSAP1, associated with shorter survival times of patients. Integrated analyses of miRNAs and mRNAs in tumors from mouse models can lead to identification of therapeutic targets in humans. The currently reported miRNA and mRNA profiling data have been submitted to the Gene Expression Omnibus (super-series accession number GSE102418).
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Affiliation(s)
- Sanchari Roy
- Division of Gastroenterology, Hepatology and Hepatobiliary Oncology,Department of Medicine III, University Hospital RWTH Aachen, Aachen Germany
| | - Guido J. Hooiveld
- Nutrition, Metabolism & Genomics Group, Division of Human Nutrition, Wageningen University, Wageningen, Netherlands
| | - Marco Seehawer
- Department of Internal Medicine VIII, University Hospital Tübingen, 72076 Tübingen, Germany,Department of Physiology I, Institute of Physiology, Eberhard Karls University Tübingen, 72076 Tübingen, Germany
| | - Stefano Caruso
- Inserm UMR-1162, Functional Genomics of Solid Tumors, University Paris Descartes, University University Paris Diderot, University Paris 13, Labex Immuno-Oncology, Paris, France
| | - Florian Heinzmann
- Department of Internal Medicine VIII, University Hospital Tübingen, 72076 Tübingen, Germany,Department of Physiology I, Institute of Physiology, Eberhard Karls University Tübingen, 72076 Tübingen, Germany
| | | | - Anna K. Frank
- Department of Medicine III, University Hospital RWTH Aachen, Aachen Germany
| | | | - Roland Sonntag
- Department of Medicine III, University Hospital RWTH Aachen, Aachen Germany
| | - Mark Luedde
- Department of Cardiology, University Hospital Kiel, 25105 Kiel, Germany
| | | | - Ilan Stein
- Department of Pathology, Hadassah–Hebrew University Medical Center, Jerusalem, Israel
| | - Eli Pikarsky
- Department of Pathology, Hadassah–Hebrew University Medical Center, Jerusalem, Israel
| | - Sven Loosen
- Department of Medicine III, University Hospital RWTH Aachen, Aachen Germany
| | - Frank Tacke
- Department of Medicine III, University Hospital RWTH Aachen, Aachen Germany
| | - Marc Ringelhan
- Technische Universität München, Ismaningerstr. 22, 81675 München
| | - Seda Kilinc Avsaroglu
- Department of Cell and Tissue Biology, University of California, San Francisco, CA 94143-0452
| | - Andrei Goga
- Department of Cell and Tissue Biology, University of California, San Francisco, CA 94143-0452
| | - Marie-Annick Buendia
- Inserm Unit U1193, University Paris-Sud, Paul Brousse Hospital, Villejuif, France
| | - Mihael Vucur
- Division of Gastroenterology, Hepatology and Hepatobiliary Oncology
| | - Mathias Heikenwalder
- Division of Chronic Inflammation and Cancer, German Cancer Research Center (DKFZ), Germany
| | - Jessica Zucman-Rossi
- Inserm UMR-1162, Functional Genomics of Solid Tumors, University Paris Descartes, University University Paris Diderot, University Paris 13, Labex Immuno-Oncology, Paris, France
| | - Lars Zender
- Department of Internal Medicine VIII, University Hospital Tübingen, 72076 Tübingen, Germany,Department of Physiology I, Institute of Physiology, Eberhard Karls University Tübingen, 72076 Tübingen, Germany,Translational Gastrointestinal Oncology Group, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg 69120, Germany
| | | | - Tom Luedde
- Division of Gastroenterology, Hepatology and Hepatobiliary Oncology, Aachen Germany; Department of Medicine III, University Hospital RWTH Aachen, Aachen Germany.
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34
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Cappell SD, Mark KG, Garbett D, Pack LR, Rape M, Meyer T. EMI1 switches from being a substrate to an inhibitor of APC/C CDH1 to start the cell cycle. Nature 2018; 558:313-317. [PMID: 29875408 DOI: 10.1038/s41586-018-0199-7] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 04/17/2018] [Indexed: 11/09/2022]
Abstract
Mammalian cells integrate mitogen and stress signalling before the end of G1 phase to determine whether or not they enter the cell cycle1-4. Before cells can replicate their DNA in S phase, they have to activate cyclin-dependent kinases (CDKs), induce an E2F transcription program and inactivate the anaphase-promoting complex (APC/CCDH1, also known as the cyclosome), which is an E3 ubiquitin ligase that contains the co-activator CDH1 (also known as FZR, encoded by FZR1). It was recently shown that stress can return cells to quiescence after CDK2 activation and E2F induction but not after inactivation of APC/CCDH1, which suggests that APC/CCDH1 inactivation is the point of no return for cell-cycle entry 3 . Rapid inactivation of APC/CCDH1 requires early mitotic inhibitor 1 (EMI1)3,5, but the molecular mechanism that controls this cell-cycle commitment step is unknown. Here we show using human cell models that cell-cycle commitment is mediated by an EMI1-APC/CCDH1 dual-negative feedback switch, in which EMI1 is both a substrate and an inhibitor of APC/CCDH1. The inactivation switch triggers a transition between a state with low EMI1 levels and high APC/CCDH1 activity during G1 and a state with high EMI1 levels and low APC/CCDH1 activity during S and G2. Cell-based analysis, in vitro reconstitution and modelling data show that the underlying dual-negative feedback is bistable and represents a robust irreversible switch. Our study suggests that mammalian cells commit to the cell cycle by increasing CDK2 activity and EMI1 mRNA expression to trigger a one-way APC/CCDH1 inactivation switch that is mediated by EMI1 transitioning from acting as a substrate of APC/CCDH1 to being an inhibitor of APC/CCDH1.
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Affiliation(s)
- Steven D Cappell
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA. .,Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA.
| | - Kevin G Mark
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA, USA.,Howard Hughes Medical Institute, Berkeley, CA, USA
| | - Damien Garbett
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Lindsey R Pack
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Michael Rape
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA, USA.,Howard Hughes Medical Institute, Berkeley, CA, USA
| | - Tobias Meyer
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA.
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35
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NUSAP1 gene silencing inhibits cell proliferation, migration and invasion through inhibiting DNMT1 gene expression in human colorectal cancer. Exp Cell Res 2018; 367:216-221. [PMID: 29608915 DOI: 10.1016/j.yexcr.2018.03.039] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 03/26/2018] [Accepted: 03/29/2018] [Indexed: 01/26/2023]
Abstract
Colorectal cancer (CRC) is one of the most common cause of cancer-related death in both female and male patients, with a high capacity for tumor migration and invasion. Recently, aberrant nucleolar and spindle-associated protein 1 (NUSAP1) expression has been reported in several cancers. However, the biological function and molecular mechanism of NUSAP1 in CRC have not been reported. Here, we demonstrated that NUSAP1 gene expression was notably upregulated in CRC tissues and cell lines (Caco2, LS174T, SW480, and LoVo). Subsequently, SW480 and LoVo cells were transfected with NUSAP1 siRNA, respectively, and the biological function of NUSAP1 was investigated. Results indicated that NUSAP1 silencing by siRNA inhibited CRC cell proliferation, and induces cell apoptosis. Moreover, NUSAP1 knockdown suppressed cell migration, cell invasion, and epithelial-to-mesenchymal transition (EMT). Furthermore, NUSAP1 silencing notably inhibited the mRNA and protein expression level of DNA methyltransferase 1 (DNMT1). DNMT1 overexpression partly rescued the effect of NUSAP1 silencing on colorectal cancer biological function. Taken together, NUSAP1 gene silencing induced cell apoptosis, and inhibited cell proliferation, cell migration, cell invasion, and EMT in colorectal cancer through inhibiting DNMT1 gene expression. These findings indicat that NUSAP1 is a promising molecular target for CRC treatment.
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36
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Mills CA, Suzuki A, Arceci A, Mo JY, Duncan A, Salmon ED, Emanuele MJ. Nucleolar and spindle-associated protein 1 (NUSAP1) interacts with a SUMO E3 ligase complex during chromosome segregation. J Biol Chem 2017; 292:17178-17189. [PMID: 28900032 DOI: 10.1074/jbc.m117.796045] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/19/2017] [Indexed: 01/10/2023] Open
Abstract
The mitotic spindle is composed of dynamic microtubules and associated proteins that together direct chromosome movement during mitosis. The spindle plays a vital role in accurate chromosome segregation fidelity and is a therapeutic target in cancer. Nevertheless, the molecular mechanisms by which many spindle-associated proteins function remains unknown. The nucleolar and spindle-associated protein NUSAP1 is a microtubule-binding protein implicated in spindle stability and chromosome segregation. We show here that NUSAP1 localizes to dynamic spindle microtubules in a unique chromosome-centric pattern, in the vicinity of overlapping microtubules, during metaphase and anaphase of mitosis. Mass spectrometry-based analysis of endogenous NUSAP1 interacting proteins uncovered a cell cycle-regulated interaction between the RanBP2-RanGAP1-UBC9 SUMO E3 ligase complex and NUSAP1. Like NUSAP1 depletion, RanBP2 depletion impaired the response of cells to the microtubule poison Taxol. NUSAP1 contains a conserved SAP domain (SAF-A/B, Acinus, and PIAS). SAP domains are common among many other SUMO E3s, and are implicated in substrate recognition and ligase activity. We speculate that NUSAP1 contributes to accurate chromosome segregation by acting as a co-factor for RanBP2-RanGAP1-UBC9 during cell division.
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Affiliation(s)
- Christine A Mills
- From the Lineberger Comprehensive Cancer Center.,Departments of Pharmacology and
| | | | - Anthony Arceci
- From the Lineberger Comprehensive Cancer Center.,Curriculum in Genetics and Molecular Biology, and
| | - Jin Yao Mo
- Department of Medicine and Division of Infectious Diseases, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Alex Duncan
- From the Lineberger Comprehensive Cancer Center.,Department of Medicine and Division of Infectious Diseases, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | | | - Michael J Emanuele
- From the Lineberger Comprehensive Cancer Center, .,Departments of Pharmacology and.,Curriculum in Genetics and Molecular Biology, and
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Davey NE, Morgan DO. Building a Regulatory Network with Short Linear Sequence Motifs: Lessons from the Degrons of the Anaphase-Promoting Complex. Mol Cell 2017; 64:12-23. [PMID: 27716480 DOI: 10.1016/j.molcel.2016.09.006] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The anaphase-promoting complex or cyclosome (APC/C) is a ubiquitin ligase that polyubiquitinates specific substrates at precise times in the cell cycle, thereby triggering the events of late mitosis in a strict order. The robust substrate specificity of the APC/C prevents the potentially deleterious degradation of non-APC/C substrates and also averts the cell-cycle errors and genomic instability that could result from mistimed degradation of APC/C targets. The APC/C recognizes short linear sequence motifs, or degrons, on its substrates. The specific and timely modification and degradation of APC/C substrates is likely to be modulated by variations in degron sequence and context. We discuss the extensive affinity, specificity, and selectivity determinants encoded in APC/C degrons, and we describe some of the extrinsic mechanisms that control APC/C-substrate recognition. As an archetype for protein motif-driven regulation of cell function, the APC/C-substrate interaction provides insights into the general properties of post-translational regulatory systems.
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Affiliation(s)
- Norman E Davey
- Conway Institute of Biomolecular and Biomedical Sciences, University College Dublin, Dublin 4, Ireland.
| | - David O Morgan
- Departments of Physiology and Biochemistry & Biophysics, University of California, San Francisco, San Francisco, CA 94143, USA.
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In vivo loss-of-function screens identify KPNB1 as a new druggable oncogene in epithelial ovarian cancer. Proc Natl Acad Sci U S A 2017; 114:E7301-E7310. [PMID: 28811376 DOI: 10.1073/pnas.1705441114] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Epithelial ovarian cancer (EOC) is a deadly cancer, and its prognosis has not been changed significantly during several decades. To seek new therapeutic targets for EOC, we performed an in vivo dropout screen in human tumor xenografts using a pooled shRNA library targeting thousands of druggable genes. Then, in follow-up studies, we performed a second screen using a genome-wide CRISPR/Cas9 library. These screens identified 10 high-confidence drug targets that included well-known oncogenes such as ERBB2 and RAF1, and novel oncogenes, notably KPNB1, which we investigated further. Genetic and pharmacological inhibition showed that KPNB1 exerts its antitumor effects through multiphase cell cycle arrest and apoptosis induction. Mechanistically, proteomic studies revealed that KPNB1 acts as a master regulator of cell cycle-related proteins, including p21, p27, and APC/C. Clinically, EOC patients with higher expression levels of KPNB1 showed earlier recurrence and worse prognosis than those with lower expression levels of KPNB1. Interestingly, ivermectin, a Food and Drug Administration-approved antiparasitic drug, showed KPNB1-dependent antitumor effects on EOC, serving as an alternative therapeutic toward EOC patients through drug repositioning. Last, we found that the combination of ivermectin and paclitaxel produces a stronger antitumor effect on EOC both in vitro and in vivo than either drug alone. Our studies have thus identified a combinatorial therapy for EOC, in addition to a plethora of potential drug targets.
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39
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Abstract
Ubiquitylation is essential for signal transduction as well as cell division and differentiation in all eukaryotes. Substrate modifications range from a single ubiquitin molecule to complex polymeric chains, with different types of ubiquitylation often eliciting distinct outcomes. The recent identification of novel chain topologies has improved our understanding of how ubiquitylation establishes precise communication within cells. Here, we discuss how the increasing complexity of ubiquitylation is employed to ensure robust and faithful signal transduction in eukaryotic cells.
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40
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Buneeva OA, Medvedev AE. The role of atypical ubiquitination in cell regulation. BIOCHEMISTRY MOSCOW-SUPPLEMENT SERIES B-BIOMEDICAL CHEMISTRY 2017. [DOI: 10.1134/s1990750817010024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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41
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Buneeva OA, Medvedev AE. [Atypical ubiquitination of proteins]. BIOMEDIT︠S︡INSKAI︠A︡ KHIMII︠A︡ 2017; 62:496-509. [PMID: 27797324 DOI: 10.18097/pbmc20166205496] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Ubiquitination is a type of posttranslational modification of intracellular proteins characterized by covalent attachment of one (monoubiquitination) or several (polyubiquitination) of ubiquitin molecules to target proteins. In the case of polyubiquitination, linear or branched polyubiquitin chains are formed. Their formation involves various lysine residues of monomeric ubiquitin. The best studied is Lys48-polyubiquitination, which targets proteins for proteasomal degradation. In this review we have considered examples of so-called atypical polyubiquitination, which mainly involves other lysine residues (Lys6, Lys11, Lys27, Lys29, Lys33, Lys63) and also N-terminal methionine. The considered examples convincingly demonstrate that polyubiquitination of proteins not necessarily targets proteins for their proteolytic degradation in proteasomes. Atypically polyubiquitinated proteins are involved in regulation of various processes and altered polyubiquitination of certain proteins is crucial for development of serious diseases.
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Affiliation(s)
- O A Buneeva
- Institute of Biomedical Chemistry, Moscow, Russia
| | - A E Medvedev
- Institute of Biomedical Chemistry, Moscow, Russia
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42
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Pavlides SC, Lecanda J, Daubriac J, Pandya UM, Gama P, Blank S, Mittal K, Shukla P, Gold LI. TGF-β activates APC through Cdh1 binding for Cks1 and Skp2 proteasomal destruction stabilizing p27kip1 for normal endometrial growth. Cell Cycle 2017; 15:931-47. [PMID: 26963853 DOI: 10.1080/15384101.2016.1150393] [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] [Indexed: 01/07/2023] Open
Abstract
We previously reported that aberrant TGF-β/Smad2/3 signaling in endometrial cancer (ECA) leads to continuous ubiquitylation of p27(kip1)(p27) by the E3 ligase SCF-Skp2/Cks1 causing its degradation, as a putative mechanism involved in the pathogenesis of this cancer. In contrast, normal intact TGF-β signaling prevents degradation of nuclear p27 by SCF-Skp2/Cks1 thereby accumulating p27 to block Cdk2 for growth arrest. Here we show that in ECA cell lines and normal primary endometrial epithelial cells, TGF-β increases Cdh1 and its binding to APC/C to form the E3 ligase complex that ubiquitylates Cks1 and Skp2 prompting their proteasomal degradation and thus, leaving p27 intact. Knocking-down Cdh1 in ECA cell lines increased Skp2/Cks1 E3 ligase activity, completely diminished nuclear and cytoplasmic p27, and obviated TGF-β-mediated inhibition of proliferation. Protein synthesis was not required for TGF-β-induced increase in nuclear p27 and decrease in Cks1 and Skp2. Moreover, half-lives of Cks1 and Skp2 were extended in the Cdh1-depleted cells. These results suggest that the levels of p27, Skp2 and Cks1 are strongly or solely regulated by proteasomal degradation. Finally, an inverse relationship of low p27 and high Cks1 in the nucleus was shown in patients in normal proliferative endometrium and grade I-III ECAs whereas differentiated secretory endometrium showed the reverse. These studies implicate Cdh1 as the master regulator of TGF-β-induced preservation of p27 tumor suppressor activity. Thus, Cdh1 is a potential therapeutic target for ECA and other human cancers showing an inverse relationship between Cks1/Skp2 and p27 and/or dysregulated TGF-β signaling.
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Affiliation(s)
- Savvas C Pavlides
- a Department of Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA.,b Divisions of Translational Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA
| | - Jon Lecanda
- a Department of Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA.,b Divisions of Translational Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA
| | - Julien Daubriac
- a Department of Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA.,b Divisions of Translational Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA
| | - Unnati M Pandya
- a Department of Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA.,b Divisions of Translational Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA
| | - Patricia Gama
- c Department of Cell and Developmental Biology , Institute of Biomedical Sciences, University of Sao Paolo , Brazil
| | - Stephanie Blank
- a Department of Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA.,d Gynecologic Oncology, New York University School of Medicine Langone Medical Center , New York , NY , USA.,e Perlmutter Cancer Center at NYU, New York University School of Medicine Langone Medical Center , New York , NY , USA
| | - Khushbakhat Mittal
- d Gynecologic Oncology, New York University School of Medicine Langone Medical Center , New York , NY , USA.,e Perlmutter Cancer Center at NYU, New York University School of Medicine Langone Medical Center , New York , NY , USA
| | - Pratibha Shukla
- a Department of Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA.,d Gynecologic Oncology, New York University School of Medicine Langone Medical Center , New York , NY , USA.,e Perlmutter Cancer Center at NYU, New York University School of Medicine Langone Medical Center , New York , NY , USA
| | - Leslie I Gold
- a Department of Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA.,b Divisions of Translational Medicine , New York University School of Medicine Langone Medical Center , New York , NY , USA.,e Perlmutter Cancer Center at NYU, New York University School of Medicine Langone Medical Center , New York , NY , USA.,f Department of Pathology , New York University School of Medicine Langone Medical Center , New York , NY , USA
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43
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Zhou Z, He M, Shah AA, Wan Y. Insights into APC/C: from cellular function to diseases and therapeutics. Cell Div 2016; 11:9. [PMID: 27418942 PMCID: PMC4944252 DOI: 10.1186/s13008-016-0021-6] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 05/27/2016] [Indexed: 02/07/2023] Open
Abstract
Anaphase-promoting complex/cyclosome (APC/C) is a multifunctional ubiquitin-protein ligase that targets different substrates for ubiquitylation and therefore regulates a variety of cellular processes such as cell division, differentiation, genome stability, energy metabolism, cell death, autophagy as well as carcinogenesis. Activity of APC/C is principally governed by two WD-40 domain proteins, Cdc20 and Cdh1, in and beyond cell cycle. In the past decade, the results based on numerous biochemical, 3D structural, mouse genetic and small molecule inhibitor studies have largely attracted our attention into the emerging role of APC/C and its regulation in biological function, human diseases and potential therapeutics. This review will aim to summarize some recently reported insights into APC/C in regulating cellular function, connection of its dysfunction with human diseases and its implication of therapeutics.
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Affiliation(s)
- Zhuan Zhou
- Department of Cell Biology, University of Pittsburgh School of Medicine and University of Pittsburgh Cancer Institute, 5117 Centre Avenue, Hillman Cancer Center, HCC2.6c, Pittsburgh, PA 15213 USA
| | - Mingjing He
- Department of Cell Biology, University of Pittsburgh School of Medicine and University of Pittsburgh Cancer Institute, 5117 Centre Avenue, Hillman Cancer Center, HCC2.6c, Pittsburgh, PA 15213 USA ; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041 Sichuan People's Republic of China
| | - Anil A Shah
- Department of Cell Biology, University of Pittsburgh School of Medicine and University of Pittsburgh Cancer Institute, 5117 Centre Avenue, Hillman Cancer Center, HCC2.6c, Pittsburgh, PA 15213 USA
| | - Yong Wan
- Department of Cell Biology, University of Pittsburgh School of Medicine and University of Pittsburgh Cancer Institute, 5117 Centre Avenue, Hillman Cancer Center, HCC2.6c, Pittsburgh, PA 15213 USA
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44
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Sturgill EG, Norris SR, Guo Y, Ohi R. Kinesin-5 inhibitor resistance is driven by kinesin-12. J Cell Biol 2016; 213:213-27. [PMID: 27091450 PMCID: PMC5084272 DOI: 10.1083/jcb.201507036] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 03/10/2016] [Indexed: 12/27/2022] Open
Abstract
The kinesin-5 Eg5 is essential for mitotic progression, and the lethal effects of Eg5 inhibitors make these inhibitors attractive candidates for chemotherapy drugs. Sturgill et al. show that kinesin-12 and a nonmotile Eg5 mutant form an alternative spindle assembly pathway that provides resistance to Eg5 inhibitors. The microtubule (MT) cytoskeleton bipolarizes at the onset of mitosis to form the spindle. In animal cells, the kinesin-5 Eg5 primarily drives this reorganization by actively sliding MTs apart. Its primacy during spindle assembly renders Eg5 essential for mitotic progression, demonstrated by the lethal effects of kinesin-5/Eg5 inhibitors (K5Is) administered in cell culture. However, cultured cells can acquire resistance to K5Is, indicative of alternative spindle assembly mechanisms and/or pharmacological failure. Through characterization of novel K5I-resistant cell lines, we unveil an Eg5 motility-independent spindle assembly pathway that involves both an Eg5 rigor mutant and the kinesin-12 Kif15. This pathway centers on spindle MT bundling instead of Kif15 overexpression, distinguishing it from those previously described. We further show that large populations (∼107 cells) of HeLa cells require Kif15 to survive K5I treatment. Overall, this study provides insight into the functional plasticity of mitotic kinesins during spindle assembly and has important implications for the development of antimitotic regimens that target this process.
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Affiliation(s)
- Emma G Sturgill
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Stephen R Norris
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Yan Guo
- Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Ryoma Ohi
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232
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45
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New concepts on BARD1: Regulator of BRCA pathways and beyond. Int J Biochem Cell Biol 2016; 72:1-17. [DOI: 10.1016/j.biocel.2015.12.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 01/09/2023]
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46
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Li C, Xue C, Yang Q, Low BC, Liou YC. NuSAP governs chromosome oscillation by facilitating the Kid-generated polar ejection force. Nat Commun 2016; 7:10597. [PMID: 26839278 PMCID: PMC4742958 DOI: 10.1038/ncomms10597] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 01/04/2016] [Indexed: 12/17/2022] Open
Abstract
In vertebrate cells, chromosomes oscillate to align precisely during metaphase. NuSAP, a microtubule-associated protein, plays a critical role in stabilizing spindle microtubules. In this study, we utilize 3D time-lapse live-cell imaging to monitor the role of NuSAP in chromosome oscillation and identify NuSAP as a novel regulator of the chromokinesin, Kid. Depletion of NuSAP significantly suppresses the amplitude and velocity of chromosome oscillation. We analyse the effects of NuSAP and Kid depletion in monopolar and bipolar cells with or without kinetochore microtubule depletion. Twelve postulated conditions are deciphered to reveal the contribution of NuSAP to the polar force generated at kinetochore microtubules and to the regulation of the polar ejection force generated by Kid, thus revealing a pivotal role of NuSAP in chromosome oscillation. During metaphase, alignment of chromosomes is facilitated by oscillations driven by the chromokinesin Kid. Here Li et al. show that the microtubule-associated protein NuSAP is a novel regulator of Kid, regulating the amplitude and velocity of chromosome oscillation.
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Affiliation(s)
- Chenyu Li
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, Singapore 117543, Republic of Singapore
| | - Chenyi Xue
- Cardiovascular Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Qiaoyun Yang
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, Singapore 117543, Republic of Singapore
| | - Boon Chuan Low
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, Singapore 117543, Republic of Singapore.,Mechanobiology Institute, National University of Singapore, Singapore 117411, Republic of Singapore
| | - Yih-Cherng Liou
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, Singapore 117543, Republic of Singapore.,Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117573, Republic of Singapore
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47
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Lindon C, Grant R, Min M. Ubiquitin-Mediated Degradation of Aurora Kinases. Front Oncol 2016; 5:307. [PMID: 26835416 PMCID: PMC4716142 DOI: 10.3389/fonc.2015.00307] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/25/2015] [Indexed: 11/18/2022] Open
Abstract
The Aurora kinases are essential regulators of mitosis in eukaryotes. In somatic cell divisions of higher eukaryotes, the paralogs Aurora kinase A (AurA) and Aurora kinase B (AurB) play non-overlapping roles that depend on their distinct spatiotemporal activities. These mitotic roles of Aurora kinases depend on their interactions with different partners that direct them to different mitotic destinations and different substrates: AurB is a component of the chromosome passenger complex that orchestrates the tasks of chromosome segregation and cytokinesis, while AurA has many known binding partners and mitotic roles, including a well-characterized interaction with TPX2 that mediates its role in mitotic spindle assembly. Beyond the spatial control conferred by different binding partners, Aurora kinases are subject to temporal control of their activation and inactivation. Ubiquitin-mediated proteolysis is a critical route to irreversible inactivation of these kinases, which must occur for ordered transition from mitosis back to interphase. Both AurA and AurB undergo targeted proteolysis after anaphase onset as substrates of the anaphase-promoting complex/cyclosome (APC/C) ubiquitin ligase, even while they continue to regulate steps during mitotic exit. Temporal control of Aurora kinase destruction ensures that AurB remains active at the midbody during cytokinesis long after AurA activity has been largely eliminated from the cell. Differential destruction of Aurora kinases is achieved despite the fact that they are targeted at the same time and by the same ubiquitin ligase, making these substrates an interesting case study for investigating molecular determinants of ubiquitin-mediated proteolysis in higher eukaryotes. The prevalence of Aurora overexpression in cancers and their potential as therapeutic targets add importance to the task of understanding the molecular determinants of Aurora kinase stability. Here, we review what is known about ubiquitin-mediated targeting of these critical mitotic regulators and discuss the different factors that contribute to proteolytic control of Aurora kinase activity in the cell.
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Affiliation(s)
- Catherine Lindon
- Department of Pharmacology, University of Cambridge , Cambridge , UK
| | - Rhys Grant
- Department of Pharmacology, University of Cambridge , Cambridge , UK
| | - Mingwei Min
- Department of Cell Biology, Harvard Medical School , Boston, MA , USA
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48
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Li C, Zhang Y, Yang Q, Ye F, Sun SY, Chen ES, Liou YC. NuSAP modulates the dynamics of kinetochore microtubules by attenuating MCAK depolymerisation activity. Sci Rep 2016; 6:18773. [PMID: 26733216 PMCID: PMC4702128 DOI: 10.1038/srep18773] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 11/26/2015] [Indexed: 11/15/2022] Open
Abstract
Nucleolar and spindle-associated protein (NuSAP) is a microtubule-associated protein that functions as a microtubule stabiliser. Depletion of NuSAP leads to severe mitotic defects, however the mechanism by which NuSAP regulates mitosis remains elusive. In this study, we identify the microtubule depolymeriser, mitotic centromere-associated kinesin (MCAK), as a novel binding partner of NuSAP. We show that NuSAP regulates the dynamics and depolymerisation activity of MCAK. Phosphorylation of MCAK by Aurora B kinase, a component of the chromosomal passenger complex, significantly enhances the interaction of NuSAP with MCAK and modulates the effects of NuSAP on the depolymerisation activity of MCAK. Our results reveal an underlying mechanism by which NuSAP controls kinetochore microtubule dynamics spatially and temporally by modulating the depolymerisation function of MCAK in an Aurora B kinase-dependent manner. Hence, this study provides new insights into the function of NuSAP in spindle formation during mitosis.
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Affiliation(s)
- Chenyu Li
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, 117543, Republic of Singapore
| | - Yajun Zhang
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, 117543, Republic of Singapore
| | - Qiaoyun Yang
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, 117543, Republic of Singapore
| | - Fan Ye
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, 117543, Republic of Singapore
| | - Stella Ying Sun
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, 117543, Republic of Singapore
| | - Ee Sin Chen
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Republic of Singapore
| | - Yih-Cherng Liou
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, 117543, Republic of Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117573, Republic of Singapore
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49
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Abstract
Chromosomes are not only carriers of the genetic material, but also actively regulate the assembly of complex intracellular architectures. During mitosis, chromosome-induced microtubule polymerisation ensures spindle assembly in cells without centrosomes and plays a supportive role in centrosome-containing cells. Chromosomal signals also mediate post-mitotic nuclear envelope (NE) re-formation. Recent studies using novel approaches to manipulate histones in oocytes, where functions can be analysed in the absence of transcription, have established that nucleosomes, but not DNA alone, mediate the chromosomal regulation of spindle assembly and NE formation. Both processes require the generation of RanGTP by RCC1 recruited to nucleosomes but nucleosomes also acquire cell cycle stage specific regulators, Aurora B in mitosis and ELYS, the initiator of nuclear pore complex assembly, at mitotic exit. Here, we review the mechanisms by which nucleosomes control assembly and functions of the spindle and the NE, and discuss their implications for genome maintenance.
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Affiliation(s)
- Christian Zierhut
- Laboratory of Chromosome and Cell Biology, Rockefeller University, New York, NY, USA
| | - Hironori Funabiki
- Laboratory of Chromosome and Cell Biology, Rockefeller University, New York, NY, USA
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50
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Ben-Eliezer I, Pomerantz Y, Galiani D, Nevo N, Dekel N. Appropriate expression of Ube2C and Ube2S controls the progression of the first meiotic division. FASEB J 2015. [PMID: 26207029 DOI: 10.1096/fj.15-274522] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Timely degradation of protein regulators of the cell cycle is essential for the completion of cell division. This degradation is promoted by the E3 anaphase-promoting complex/cyclosome (APC/C) and mediated by the E2 ubiquitin-conjugating enzymes (Ube2s). Unlike the ample information gathered regarding the meiotic E3 APC/C, the E2s participating in this cell division have never been studied. We identified Ube2C, -S, and -D3 as the E2 enzymes that regulate APC/C activity during meiosis of mouse oocytes. Their depletion reduces the levels of the first meiotic cytokinesis by 50%, and their overexpression doubles and accelerates its completion (50% as compared with 4% at 11 h). We also demonstrated that these E2s take part in ensuring appropriate spindle formation. It is noteworthy that high levels of Ube2C bring about the resumption of the first meiotic division, regardless of the formation of the spindle, overriding the spindle assembly checkpoint. Thus, alongside their canonical function in protein degradation, Ube2C and -S also control the extrusion of the first polar body. Overall, our study characterizes new regulators and unveils the novel roles they play during the meiotic division. These findings shed light on faithful chromosome segregation in oocytes and may contribute to better understanding of aneuploidy and its consequent genetic malformations.
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Affiliation(s)
- Inbal Ben-Eliezer
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot, Israel
| | - Yael Pomerantz
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot, Israel
| | - Dalia Galiani
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot, Israel
| | - Nava Nevo
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot, Israel
| | - Nava Dekel
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot, Israel
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