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Mohapatra BC, Mirza S, Bele A, Gurumurthy CB, Raza M, Saleem I, Storck MD, Sarkar A, Kollala SS, Shukla SK, Southekal S, Wagner KU, Qiu F, Lele SM, Alsaleem MA, Rakha EA, Guda C, Singh PK, Cardiff RD, Band H, Band V. Ecdysoneless Overexpression Drives Mammary Tumorigenesis through Upregulation of C-MYC and Glucose Metabolism. Mol Cancer Res 2022; 20:1391-1404. [PMID: 35675041 PMCID: PMC9437571 DOI: 10.1158/1541-7786.mcr-22-0122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/03/2022] [Accepted: 06/03/2022] [Indexed: 01/09/2023]
Abstract
Ecdysoneless (ECD) protein is essential for embryogenesis, cell-cycle progression, and cellular stress mitigation with an emerging role in mRNA biogenesis. We have previously shown that ECD protein as well as its mRNA are overexpressed in breast cancer and ECD overexpression predicts shorter survival in patients with breast cancer. However, the genetic evidence for an oncogenic role of ECD has not been established. Here, we generated transgenic mice with mammary epithelium-targeted overexpression of an inducible human ECD transgene (ECDTg). Significantly, ECDTg mice develop mammary hyperplasia, preneoplastic lesions, and heterogeneous tumors with occasional lung metastasis. ECDTg tumors exhibit epithelial to mesenchymal transition and cancer stem cell characteristics. Organoid cultures of ECDTg tumors showed ECD dependency for in vitro oncogenic phenotype and in vivo growth when implanted in mice. RNA sequencing (RNA-seq) analysis of ECDTg tumors showed a c-MYC signature, and alterations in ECD levels regulated c-MYC mRNA and protein levels as well as glucose metabolism. ECD knockdown-induced decrease in glucose uptake was rescued by overexpression of mouse ECD as well as c-MYC. Publicly available expression data analyses showed a significant correlation of ECD and c-MYC overexpression in breast cancer, and ECD and c-MYC coexpression exhibits worse survival in patients with breast cancer. Taken together, we establish a novel role of overexpressed ECD as an oncogenesis driver in the mouse mammary gland through upregulation of c-MYC-mediated glucose metabolism. IMPLICATIONS We demonstrate ECD overexpression in the mammary gland of mice led to the development of a tumor progression model through upregulation of c-MYC signaling and glucose metabolism.
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Affiliation(s)
- Bhopal C. Mohapatra
- Department of Genetics, Cell Biology and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Sameer Mirza
- Department of Genetics, Cell Biology and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Aditya Bele
- Department of Genetics, Cell Biology and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Channabasavaiah B. Gurumurthy
- Department of Genetics, Cell Biology and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Mohsin Raza
- Department of Genetics, Cell Biology and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Irfana Saleem
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Matthew D. Storck
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska
| | - Aniruddha Sarkar
- Department of Genetics, Cell Biology and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Sai Sundeep Kollala
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska
| | - Surendra K. Shukla
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska
| | - Siddesh Southekal
- Department of Genetics, Cell Biology and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Kay-Uwe Wagner
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska
| | - Fang Qiu
- Department of Biostatistics, College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska
| | - Subodh M. Lele
- Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
- Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Mansour A. Alsaleem
- Department of Pathology, School of Medicine, University of Nottingham, Nottingham, United Kingdom
- Department of Applied Medical Sciences, Applied College, Qassim University, Qassim, Saudi Arabia
| | - Emad A. Rakha
- Department of Pathology, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Chittibabu Guda
- Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Pankaj K. Singh
- Department of Genetics, Cell Biology and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska
- Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Robert D. Cardiff
- Department of Pathology and Laboratory Medicine, University of California, Davis, California
| | - Hamid Band
- Department of Genetics, Cell Biology and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska
- Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
- Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Vimla Band
- Department of Genetics, Cell Biology and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
- Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
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Mirza S, Kalluchi A, Raza M, Saleem I, Mohapatra B, Pal D, Ouellette MM, Qiu F, Yu L, Lobanov A, Zheng ZM, Zhang Y, Alsaleem MA, Rakha EA, Band H, Rowley MJ, Band V. Ecdysoneless Protein Regulates Viral and Cellular mRNA Splicing to Promote Cervical Oncogenesis. Mol Cancer Res 2021; 20:305-318. [PMID: 34670863 DOI: 10.1158/1541-7786.mcr-21-0567] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/10/2021] [Accepted: 10/12/2021] [Indexed: 11/16/2022]
Abstract
High-risk human papillomaviruses (HPV), exemplified by HPV16/18, are causally linked to human cancers of the anogenital tract, skin, and upper aerodigestive tract. Previously, we identified Ecdysoneless (ECD) protein, the human homolog of the Drosophila ecdysoneless gene, as a novel HPV16 E6-interacting protein. Here, we show that ECD, through its C-terminal region, selectively binds to high-risk but not to low-risk HPV E6 proteins. We demonstrate that ECD is overexpressed in cervical and head and neck squamous cell carcinoma (HNSCC) cell lines as well as in tumor tissues. Using The Cancer Genome Atlas dataset, we show that ECD mRNA overexpression predicts shorter survival in patients with cervical and HNSCC. We demonstrate that ECD knockdown in cervical cancer cell lines led to impaired oncogenic behavior, and ECD co-overexpression with E7 immortalized primary human keratinocytes. RNA-sequencing analyses of SiHa cells upon ECD knockdown showed to aberrations in E6/E7 RNA splicing, as well as RNA splicing of several HPV oncogenesis-linked cellular genes, including splicing of components of mRNA splicing machinery itself. Taken together, our results support a novel role of ECD in viral and cellular mRNA splicing to support HPV-driven oncogenesis. IMPLICATIONS: This study links ECD overexpression to poor prognosis and shorter survival in HNSCC and cervical cancers and identifies a critical role of ECD in cervical oncogenesis through regulation of viral and cellular mRNA splicing.
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Affiliation(s)
- Sameer Mirza
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska
| | - Achyuth Kalluchi
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska
| | - Mohsin Raza
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska
| | - Irfana Saleem
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Bhopal Mohapatra
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska
| | - Dhananjaya Pal
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska
| | - Michel M Ouellette
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Fang Qiu
- Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
- Department of Biostatistics, College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska
| | - Lulu Yu
- Tumor Virus RNA Biology Section, HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland
| | - Alexei Lobanov
- CCR Collaborative Bioinformatics Resource (CCBR), National Cancer Institute, Bethesda, Maryland
| | - Zhi-Ming Zheng
- Tumor Virus RNA Biology Section, HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland
| | - Ying Zhang
- Northshore University Health System, Chicago, Illinois
| | - Mansour A Alsaleem
- Department of Pathology, School of Medicine, University of Nottingham, Nottingham, United Kingdom
- Department of Applied Medical Sciences, Onizah Community College, Qassim University, Qassim, Saudi Arabia
| | - Emad A Rakha
- Department of Pathology, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Hamid Band
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska.
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska
- Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska
| | - M Jordan Rowley
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska.
| | - Vimla Band
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska.
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska
- Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
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3
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Bim LV, Carneiro TNR, Buzatto VC, Colozza-Gama GA, Koyama FC, Thomaz DMD, de Jesus Paniza AC, Lee EA, Galante PAF, Cerutti JM. Molecular Signature Expands the Landscape of Driver Negative Thyroid Cancers. Cancers (Basel) 2021; 13:5184. [PMID: 34680332 PMCID: PMC8534197 DOI: 10.3390/cancers13205184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 10/12/2021] [Indexed: 12/04/2022] Open
Abstract
Thyroid cancer is the most common endocrine malignancy. However, the cytological diagnosis of follicular thyroid carcinoma (FTC), Hürthle cell carcinoma (HCC), and follicular variant of papillary thyroid carcinoma (FVPTC) and their benign counterparts is a challenge for preoperative diagnosis. Nearly 20-30% of biopsied thyroid nodules are classified as having indeterminate risk of malignancy and incur costs to the health care system. Based on that, 120 patients were screened for the main driver mutations previously described in thyroid cancer. Subsequently, 14 mutation-negative cases that are the main source of diagnostic errors (FTC, HCC, or FVPTC) underwent RNA-Sequencing analysis. Somatic variants in candidate driver genes (ECD, NUP98,LRP1B, NCOR1, ATM, SOS1, and SPOP) and fusions were described. NCOR1 and SPOP variants underwent validation. Moreover, expression profiling of driver-negative samples was compared to 16 BRAF V600E, RAS, or PAX8-PPARg positive samples. Negative samples were separated in two clusters, following the expression pattern of the RAS/PAX8-PPARg or BRAF V600E positive samples. Both negative groups showed distinct BRS, ERK, and TDS scores, tumor mutation burden, signaling pathways and immune cell profile. Altogether, here we report novel gene variants and describe cancer-related pathways that might impact preoperative diagnosis and provide insights into thyroid tumor biology.
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Affiliation(s)
- Larissa Valdemarin Bim
- Genetic Bases of Thyroid Tumors Laboratory, Division of Genetics, Department of Morphology and Genetics, Escola Paulista de Medicina, Universidade Federal de São Paulo, Pedro de Toledo 669, 11 Andar, São Paulo 04039-032, SP, Brazil; (L.V.B.); (T.N.R.C.); (G.A.C.-G.); (D.M.D.T.); (A.C.d.J.P.)
| | - Thaise Nayane Ribeiro Carneiro
- Genetic Bases of Thyroid Tumors Laboratory, Division of Genetics, Department of Morphology and Genetics, Escola Paulista de Medicina, Universidade Federal de São Paulo, Pedro de Toledo 669, 11 Andar, São Paulo 04039-032, SP, Brazil; (L.V.B.); (T.N.R.C.); (G.A.C.-G.); (D.M.D.T.); (A.C.d.J.P.)
| | - Vanessa Candiotti Buzatto
- Centro de Oncologia Molecular, Hospital Sírio-Libanês, Rua Professor Daher Cutait 69, Bela Vista, São Paulo 01308-060, SP, Brazil; (V.C.B.); (F.C.K.); (P.A.F.G.)
| | - Gabriel Avelar Colozza-Gama
- Genetic Bases of Thyroid Tumors Laboratory, Division of Genetics, Department of Morphology and Genetics, Escola Paulista de Medicina, Universidade Federal de São Paulo, Pedro de Toledo 669, 11 Andar, São Paulo 04039-032, SP, Brazil; (L.V.B.); (T.N.R.C.); (G.A.C.-G.); (D.M.D.T.); (A.C.d.J.P.)
| | - Fernanda C. Koyama
- Centro de Oncologia Molecular, Hospital Sírio-Libanês, Rua Professor Daher Cutait 69, Bela Vista, São Paulo 01308-060, SP, Brazil; (V.C.B.); (F.C.K.); (P.A.F.G.)
| | - Debora Mota Dias Thomaz
- Genetic Bases of Thyroid Tumors Laboratory, Division of Genetics, Department of Morphology and Genetics, Escola Paulista de Medicina, Universidade Federal de São Paulo, Pedro de Toledo 669, 11 Andar, São Paulo 04039-032, SP, Brazil; (L.V.B.); (T.N.R.C.); (G.A.C.-G.); (D.M.D.T.); (A.C.d.J.P.)
| | - Ana Carolina de Jesus Paniza
- Genetic Bases of Thyroid Tumors Laboratory, Division of Genetics, Department of Morphology and Genetics, Escola Paulista de Medicina, Universidade Federal de São Paulo, Pedro de Toledo 669, 11 Andar, São Paulo 04039-032, SP, Brazil; (L.V.B.); (T.N.R.C.); (G.A.C.-G.); (D.M.D.T.); (A.C.d.J.P.)
| | - Eunjung Alice Lee
- Division of Genetics and Genomics, Boston Children’s Hospital and Harvard Medical School, 3 Blackfan Circle, Boston, MA 02115, USA;
| | - Pedro Alexandre Favoretto Galante
- Centro de Oncologia Molecular, Hospital Sírio-Libanês, Rua Professor Daher Cutait 69, Bela Vista, São Paulo 01308-060, SP, Brazil; (V.C.B.); (F.C.K.); (P.A.F.G.)
| | - Janete Maria Cerutti
- Genetic Bases of Thyroid Tumors Laboratory, Division of Genetics, Department of Morphology and Genetics, Escola Paulista de Medicina, Universidade Federal de São Paulo, Pedro de Toledo 669, 11 Andar, São Paulo 04039-032, SP, Brazil; (L.V.B.); (T.N.R.C.); (G.A.C.-G.); (D.M.D.T.); (A.C.d.J.P.)
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4
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The Mammalian Ecdysoneless Protein Interacts with RNA Helicase DDX39A To Regulate Nuclear mRNA Export. Mol Cell Biol 2021; 41:e0010321. [PMID: 33941617 PMCID: PMC8224239 DOI: 10.1128/mcb.00103-21] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The mammalian orthologue of ecdysoneless (ECD) protein is required for embryogenesis, cell cycle progression, and mitigation of endoplasmic reticulum stress. Here, we identified key components of the mRNA export complexes as binding partners of ECD and characterized the functional interaction of ECD with key mRNA export-related DEAD BOX protein helicase DDX39A. We find that ECD is involved in RNA export through its interaction with DDX39A. ECD knockdown (KD) blocks mRNA export from the nucleus to the cytoplasm, which is rescued by expression of full-length ECD but not an ECD mutant that is defective in interaction with DDX39A. We have previously shown that ECD protein is overexpressed in ErbB2+ breast cancers (BC). In this study, we extended the analyses to two publicly available BC mRNA The Cancer Genome Atlas (TCGA) and Molecular Taxonomy of Breast Cancer International Consortium (METABRIC) data sets. In both data sets, ECD mRNA overexpression correlated with short patient survival, specifically ErbB2+ BC. In the METABRIC data set, ECD overexpression also correlated with poor patient survival in triple-negative breast cancer (TNBC). Furthermore, ECD KD in ErbB2+ BC cells led to a decrease in ErbB2 mRNA level due to a block in its nuclear export and was associated with impairment of oncogenic traits. These findings provide novel mechanistic insight into the physiological and pathological functions of ECD.
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5
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ECD promotes gastric cancer metastasis by blocking E3 ligase ZFP91-mediated hnRNP F ubiquitination and degradation. Cell Death Dis 2018; 9:479. [PMID: 29706618 PMCID: PMC5924763 DOI: 10.1038/s41419-018-0525-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 03/23/2018] [Indexed: 12/12/2022]
Abstract
The human ortholog of the Drosophila ecdysoneless gene (ECD) is required for embryonic development and cell-cycle progression; however, its role in cancer progression and metastasis remains unclear. Here, we found that ECD is frequently overexpressed in gastric cancer (GC), especially in metastatic GC, and is correlated with poor clinical outcomes in GC patients. Silencing ECD inhibited GC migration and invasion in vitro and metastasis in vivo, while ECD overexpression promoted GC migration and invasion. ECD promoted GC invasion and metastasis by protecting hnRNP F from ubiquitination and degradation. We identified ZFP91 as the E3 ubiquitin ligase that is responsible for hnRNP F ubiquitination at Lys 185 and proteasomal degradation. ECD competitively bound to hnRNP F via the N-terminal STG1 domain (13-383aa), preventing hnRNP F from interacting with ZFP91, thus preventing ZFP91-mediated hnRNP F ubiquitination and proteasomal degradation. Collectively, our findings indicate that ECD promotes cancer invasion and metastasis by preventing E3 ligase ZFP91-mediated hnRNP F ubiquitination and degradation, suggesting that ECD may be a marker for poor prognosis and a potential therapeutic target for GC patients.
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6
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Rector J, Kapil S, Treude KJ, Kumm P, Glanzer JG, Byrne BM, Liu S, Smith LM, DiMaio DJ, Giannini P, Smith RB, Oakley GG. S4S8-RPA phosphorylation as an indicator of cancer progression in oral squamous cell carcinomas. Oncotarget 2018; 8:9243-9250. [PMID: 27999209 PMCID: PMC5354728 DOI: 10.18632/oncotarget.14001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 12/13/2016] [Indexed: 02/06/2023] Open
Abstract
Oral cancers are easily accessible compared to many other cancers. Nevertheless, oral cancer is often diagnosed late, resulting in a poor prognosis. Most oral cancers are squamous cell carcinomas that predominantly develop from cell hyperplasias and dysplasias. DNA damage is induced in these tissues directly or indirectly in response to oncogene-induced deregulation of cellular proliferation. Consequently, a DNA Damage response (DDR) and a cell cycle checkpoint is activated. As dysplasia transitions to cancer, proteins involved in DNA damage and checkpoint signaling are mutated or silenced decreasing cell death while increasing genomic instability and allowing continued tumor progression. Hyperphosphorylation of Replication Protein A (RPA), including phosphorylation of Ser4 and Ser8 of RPA2, is a well-known indicator of DNA damage and checkpoint activation. In this study, we utilize S4S8-RPA phosphorylation as a marker for cancer development and progression in oral squamous cell carcinomas (OSCC). S4S8-RPA phosphorylation was observed to be low in normal cells, high in dysplasias, moderate in early grade tumors, and low in late stage tumors, essentially supporting the model of the DDR as an early barrier to tumorigenesis in certain types of cancers. In contrast, overall RPA expression was not correlative to DDR activation or tumor progression. Utilizing S4S8-RPA phosphorylation to indicate competent DDR activation in the future may have clinical significance in OSCC treatment decisions, by predicting the susceptibility of cancer cells to first-line platinum-based therapies for locally advanced, metastatic and recurrent OSCC.
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Affiliation(s)
- Jeff Rector
- Department of Oral Biology, College of Dentistry, University of Nebraska Medical Center, Lincoln NE 68583, USA
| | - Sasha Kapil
- Department of Otolaryngology/Head and Neck Surgery, University of Nebraska Medical Center, Omaha NE 68198, USA
| | - Kelly J Treude
- Department of Otolaryngology/Head and Neck Surgery, University of Nebraska Medical Center, Omaha NE 68198, USA
| | - Phyllis Kumm
- Department of Oral Biology, College of Dentistry, University of Nebraska Medical Center, Lincoln NE 68583, USA
| | - Jason G Glanzer
- Department of Oral Biology, College of Dentistry, University of Nebraska Medical Center, Lincoln NE 68583, USA
| | - Brendan M Byrne
- Department of Oral Biology, College of Dentistry, University of Nebraska Medical Center, Lincoln NE 68583, USA
| | - Shengqin Liu
- Department of Oral Biology, College of Dentistry, University of Nebraska Medical Center, Lincoln NE 68583, USA
| | - Lynette M Smith
- Department of Biostatistics, College of Public Health, University of Nebraska Medical Center, Omaha NE 68198, USA
| | - Dominick J DiMaio
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha NE 68198, USA
| | - Peter Giannini
- Department of Oral Biology, College of Dentistry, University of Nebraska Medical Center, Lincoln NE 68583, USA
| | - Russell B Smith
- Department of Otolaryngology/Head and Neck Surgery, University of Nebraska Medical Center, Omaha NE 68198, USA
| | - Greg G Oakley
- Department of Oral Biology, College of Dentistry, University of Nebraska Medical Center, Lincoln NE 68583, USA.,Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha NE 68198, USA
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Acetylation of Mammalian ADA3 Is Required for Its Functional Roles in Histone Acetylation and Cell Proliferation. Mol Cell Biol 2016; 36:2487-502. [PMID: 27402865 PMCID: PMC5021379 DOI: 10.1128/mcb.00342-16] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Accepted: 06/30/2016] [Indexed: 12/16/2022] Open
Abstract
Alteration/deficiency in activation 3 (ADA3) is an essential component of specific histone acetyltransferase (HAT) complexes. We have previously shown that ADA3 is required for establishing global histone acetylation patterns and for normal cell cycle progression (S. Mohibi et al., J Biol Chem 287:29442-29456, 2012, http://dx.doi.org/10.1074/jbc.M112.378901). Here, we report that these functional roles of ADA3 require its acetylation. We show that ADA3 acetylation, which is dynamically regulated in a cell cycle-dependent manner, reflects a balance of coordinated actions of its associated HATs, GCN5, PCAF, and p300, and a new partner that we define, the deacetylase SIRT1. We use mass spectrometry and site-directed mutagenesis to identify major sites of ADA3 acetylated by GCN5 and p300. Acetylation-defective mutants are capable of interacting with HATs and other components of HAT complexes but are deficient in their ability to restore ADA3-dependent global or locus-specific histone acetylation marks and cell proliferation in Ada3-deleted murine embryonic fibroblasts (MEFs). Given the key importance of ADA3-containing HAT complexes in the regulation of various biological processes, including the cell cycle, our study presents a novel mechanism to regulate the function of these complexes through dynamic ADA3 acetylation.
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8
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Mir RA, Lovelace J, Schafer NP, Simone PD, Kellezi A, Kolar C, Spagnol G, Sorgen PL, Band H, Band V, Borgstahl GEO. Biophysical characterization and modeling of human Ecdysoneless (ECD) protein supports a scaffolding function. AIMS BIOPHYSICS 2016; 3:195-208. [PMID: 28492064 PMCID: PMC5421643 DOI: 10.3934/biophy.2016.1.195] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The human homolog of Drosophila ecdysoneless protein (ECD) is a p53 binding protein that stabilizes and enhances p53 functions. Homozygous deletion of mouse Ecd is early embryonic lethal and Ecd deletion delays G1-S cell cycle progression. Importantly, ECD directly interacts with the Rb tumor suppressor and competes with the E2F transcription factor for binding to Rb. Further studies demonstrated ECD is overexpressed in breast and pancreatic cancers and its overexpression correlates with poor patient survival. ECD overexpression together with Ras induces cellular transformation through upregulation of autophagy. Recently we demonstrated that CK2 mediated phosphorylation of ECD and interaction with R2TP complex are important for its cell cycle regulatory function. Considering that ECD is a component of multiprotein complexes and its crystal structure is unknown, we characterized ECD structure by circular dichroism measurements and sequence analysis software. These analyses suggest that the majority of ECD is composed of α-helices. Furthermore, small angle X-ray scattering (SAXS) analysis showed that deletion fragments, ECD(1-432) and ECD(1-534), are both well-folded and reveals that the first 400 residues are globular and the next 100 residues are in an extended cylindrical structure. Taking all these results together, we speculate that ECD acts like a structural hub or scaffolding protein in its association with its protein partners. In the future, the hypothetical model presented here for ECD will need to be tested experimentally.
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Affiliation(s)
- Riyaz A Mir
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Jeff Lovelace
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Nicholas P Schafer
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
| | - Peter D Simone
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Admir Kellezi
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Carol Kolar
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Gaelle Spagnol
- Department of Biochemistry & Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Paul L Sorgen
- Department of Biochemistry & Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Hamid Band
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, USA.,Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA.,Department of Biochemistry & Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Vimla Band
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Gloria E O Borgstahl
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA.,Department of Biochemistry & Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
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9
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A Novel Interaction of Ecdysoneless (ECD) Protein with R2TP Complex Component RUVBL1 Is Required for the Functional Role of ECD in Cell Cycle Progression. Mol Cell Biol 2015; 36:886-99. [PMID: 26711270 DOI: 10.1128/mcb.00594-15] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 12/18/2015] [Indexed: 12/21/2022] Open
Abstract
Ecdysoneless (ECD) is an evolutionarily conserved protein whose germ line deletion is embryonic lethal. Deletion of Ecd in cells causes cell cycle arrest, which is rescued by exogenous ECD, demonstrating a requirement of ECD for normal mammalian cell cycle progression. However, the exact mechanism by which ECD regulates cell cycle is unknown. Here, we demonstrate that ECD protein levels and subcellular localization are invariant during cell cycle progression, suggesting a potential role of posttranslational modifications or protein-protein interactions. Since phosphorylated ECD was recently shown to interact with the PIH1D1 adaptor component of the R2TP cochaperone complex, we examined the requirement of ECD phosphorylation in cell cycle progression. Notably, phosphorylation-deficient ECD mutants that failed to bind to PIH1D1 in vitro fully retained the ability to interact with the R2TP complex and yet exhibited a reduced ability to rescue Ecd-deficient cells from cell cycle arrest. Biochemical analyses demonstrated an additional phosphorylation-independent interaction of ECD with the RUVBL1 component of the R2TP complex, and this interaction is essential for ECD's cell cycle progression function. These studies demonstrate that interaction of ECD with RUVBL1, and its CK2-mediated phosphorylation, independent of its interaction with PIH1D1, are important for its cell cycle regulatory function.
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