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Warren EB, Briano JA, Ellegood J, DeYoung T, Lerch JP, Morrow EM. 17q12 deletion syndrome mouse model shows defects in craniofacial, brain and kidney development, and glucose homeostasis. Dis Model Mech 2022; 15:dmm049752. [PMID: 36373506 PMCID: PMC10655816 DOI: 10.1242/dmm.049752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 11/04/2022] [Indexed: 11/16/2022] Open
Abstract
17q12 deletion (17q12Del) syndrome is a copy number variant (CNV) disorder associated with neurodevelopmental disorders and renal cysts and diabetes syndrome (RCAD). Using CRISPR/Cas9 genome editing, we generated a mouse model of 17q12Del syndrome on both inbred (C57BL/6N) and outbred (CD-1) genetic backgrounds. On C57BL/6N, the 17q12Del mice had severe head development defects, potentially mediated by haploinsufficiency of Lhx1, a gene within the interval that controls head development. Phenotypes included brain malformations, particularly disruption of the telencephalon and craniofacial defects. On the CD-1 background, the 17q12Del mice survived to adulthood and showed milder craniofacial and brain abnormalities. We report postnatal brain defects using automated magnetic resonance imaging-based morphometry. In addition, we demonstrate renal and blood glucose abnormalities relevant to RCAD. On both genetic backgrounds, we found sex-specific presentations, with male 17q12Del mice exhibiting higher penetrance and more severe phenotypes. Results from these experiments pinpoint specific developmental defects and pathways that guide clinical studies and a mechanistic understanding of the human 17q12Del syndrome. This mouse mutant represents the first and only experimental model to date for the 17q12 CNV disorder. This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Emily B. Warren
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI 02912, USA
- Department of Psychiatry and Human Behavior, Warren Alpert Medical School of Brown University, Providence, RI 02912, USA
- Center for Translational Neuroscience, Carney Institute for Brain Science and Brown Institute for Translational Science, Brown University, Providence, RI 02912, USA
| | - Juan A. Briano
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI 02912, USA
- Center for Translational Neuroscience, Carney Institute for Brain Science and Brown Institute for Translational Science, Brown University, Providence, RI 02912, USA
| | - Jacob Ellegood
- Mouse Imaging Centre (MICe), Hospital for Sick Children, Toronto, ON M5T 3H7, Canada
| | - Taylor DeYoung
- Mouse Imaging Centre (MICe), Hospital for Sick Children, Toronto, ON M5T 3H7, Canada
| | - Jason P. Lerch
- Mouse Imaging Centre (MICe), Hospital for Sick Children, Toronto, ON M5T 3H7, Canada
- Wellcome Centre for Integrative Neuroimaging, The University of Oxford, Oxford OX3 9DU, UK
| | - Eric M. Morrow
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI 02912, USA
- Department of Psychiatry and Human Behavior, Warren Alpert Medical School of Brown University, Providence, RI 02912, USA
- Center for Translational Neuroscience, Carney Institute for Brain Science and Brown Institute for Translational Science, Brown University, Providence, RI 02912, USA
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Catena V, Bruno T, Iezzi S, Matteoni S, Salis A, Sorino C, Damonte G, Fanciulli M. CK2-mediated phosphorylation of Che-1/AATF is required for its pro-proliferative activity. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2021; 40:232. [PMID: 34266450 PMCID: PMC8281565 DOI: 10.1186/s13046-021-02038-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/06/2021] [Indexed: 11/23/2022]
Abstract
Background Che-1/AATF (Che-1) is an RNA polymerase II binding protein involved in several cellular processes, including proliferation, apoptosis and response to stress. We have recently demonstrated that Che-1 is able to promote cell proliferation by sustaining global histone acetylation in multiple myeloma (MM) cells where it interacts with histone proteins and competes with HDAC class I members for binding. Methods Site-directed Mutagenesis was performed to generate a Che-1 mutant (Che-1 3S) lacking three serine residues (Ser316, Ser320 and Ser321) in 308–325 aa region. Western blot experiments were conducted to examine the effect of depletion or over-expression of Che-1 and Che-1 3S mutant on histone acetylation, in different human cancer cell lines. Proliferation assays were assessed to estimate the change in cells number when Che-1 was over-expressed or deleted. Immunoprecipitation assays were performed to evaluate Che-1/histone H3 interaction when Ser316, Ser320 and Ser321 were removed. The involvement of CK2 kinase in Che-1 phosphorylation at these residues was analysed by in vitro kinase, 2D gel electrophoresis assays and mass spectrometry analysis. Results Here, we confirmed that Che-1 depletion reduces cell proliferation with a concomitant general histone deacetylation in several tumor cell lines. Furthermore, we provided evidence that CK2 protein kinase phosphorylates Che-1 at Ser316, Ser320 and Ser321 and that these modifications are required for Che-1/histone H3 binding. These results improve our understanding onto the mechanisms by which Che-1 regulates histone acetylation and cell proliferation. Conclusions Che-1 phosphorylation at Ser316, Ser320 and Ser321 by CK2 promotes the interaction with histone H3 and represents an essential requirement for Che-1 pro-proliferative ability. Supplementary Information The online version contains supplementary material available at 10.1186/s13046-021-02038-x.
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Affiliation(s)
- Valeria Catena
- SAFU Laboratory, Department of Research, Advanced Diagnostics and Technological Innovation, Translational Research Area, IRCCS Regina Elena National Cancer Institute, Via E. Chianesi 53, 00144, Rome, Italy.
| | - Tiziana Bruno
- SAFU Laboratory, Department of Research, Advanced Diagnostics and Technological Innovation, Translational Research Area, IRCCS Regina Elena National Cancer Institute, Via E. Chianesi 53, 00144, Rome, Italy
| | - Simona Iezzi
- SAFU Laboratory, Department of Research, Advanced Diagnostics and Technological Innovation, Translational Research Area, IRCCS Regina Elena National Cancer Institute, Via E. Chianesi 53, 00144, Rome, Italy
| | - Silvia Matteoni
- Unit of Cellular Networks and Molecular Therapeutic Targets, Department of Research, Advanced Diagnostics and Technological Innovation, Translational Research Area, IRCCS Regina Elena National Cancer Institute, Via E. Chianesi 53, 00144, Rome, Italy
| | - Annalisa Salis
- Department of Experimental Medicine (DIMES), Biochemistry Section, University of Genoa, Viale Benedetto XV 1, 16132, Genoa, Italy
| | - Cristina Sorino
- SAFU Laboratory, Department of Research, Advanced Diagnostics and Technological Innovation, Translational Research Area, IRCCS Regina Elena National Cancer Institute, Via E. Chianesi 53, 00144, Rome, Italy
| | - Gianluca Damonte
- Department of Experimental Medicine (DIMES), Biochemistry Section, University of Genoa, Viale Benedetto XV 1, 16132, Genoa, Italy
| | - Maurizio Fanciulli
- SAFU Laboratory, Department of Research, Advanced Diagnostics and Technological Innovation, Translational Research Area, IRCCS Regina Elena National Cancer Institute, Via E. Chianesi 53, 00144, Rome, Italy.
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Che-1/AATF-induced transcriptionally active chromatin promotes cell proliferation in multiple myeloma. Blood Adv 2021; 4:5616-5630. [PMID: 33186461 DOI: 10.1182/bloodadvances.2020002566] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 09/28/2020] [Indexed: 12/18/2022] Open
Abstract
Multiple myeloma (MM) is a hematologic malignancy produced by a clonal expansion of plasma cells and characterized by abnormal production and secretion of monoclonal antibodies. This pathology exhibits an enormous heterogeneity resulting not only from genetic alterations but also from several epigenetic dysregulations. Here we provide evidence that Che-1/AATF (Che-1), an interactor of RNA polymerase II, promotes MM proliferation by affecting chromatin structure and sustaining global gene expression. We found that Che-1 depletion leads to a reduction of "active chromatin" by inducing a global decrease of histone acetylation. In this context, Che-1 directly interacts with histones and displaces histone deacetylase class I members from them. Strikingly, transgenic mice expressing human Che-1 in plasma cells develop MM with clinical features resembling those observed in the human disease. Finally, Che-1 downregulation decreases BRD4 chromatin accumulation to further sensitize MM cells to bromodomain and external domain inhibitors. These findings identify Che-1 as a promising target for MM therapy, alone or in combination with bromodomain and external domain inhibitors.
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Beyer JN, Raniszewski NR, Burslem GM. Advances and Opportunities in Epigenetic Chemical Biology. Chembiochem 2020; 22:17-42. [PMID: 32786101 DOI: 10.1002/cbic.202000459] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/10/2020] [Indexed: 12/13/2022]
Abstract
The study of epigenetics has greatly benefited from the development and application of various chemical biology approaches. In this review, we highlight the key targets for modulation and recent methods developed to enact such modulation. We discuss various chemical biology techniques to study DNA methylation and the post-translational modification of histones as well as their effect on gene expression. Additionally, we address the wealth of protein synthesis approaches to yield histones and nucleosomes bearing epigenetic modifications. Throughout, we highlight targets that present opportunities for the chemical biology community, as well as exciting new approaches that will provide additional insight into the roles of epigenetic marks.
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Affiliation(s)
- Jenna N Beyer
- Department of Biochemistry and Biophysics Perelman School of Medicine, University of Pennsylvania, 422 Curie Blvd., Philadelphia, PA 19104, USA
| | - Nicole R Raniszewski
- Department of Biochemistry and Biophysics Perelman School of Medicine, University of Pennsylvania, 422 Curie Blvd., Philadelphia, PA 19104, USA
| | - George M Burslem
- Department of Biochemistry and Biophysics Perelman School of Medicine, University of Pennsylvania, 422 Curie Blvd., Philadelphia, PA 19104, USA.,Department of Cancer Biology and Epigenetics Institute Perelman School of Medicine, University of Pennsylvania, 422 Curie Blvd., Philadelphia, PA 19104, USA
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Jing P, Zou J, Weng K, Peng P. The PI3K/AKT axis modulates AATF activity in Wilms' tumor cells. FEBS Open Bio 2018; 8:1615-1623. [PMID: 30338213 PMCID: PMC6168685 DOI: 10.1002/2211-5463.12500] [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: 04/09/2018] [Revised: 07/09/2018] [Accepted: 07/23/2018] [Indexed: 11/13/2022] Open
Abstract
Previous studies have reported excessive expression of apoptosis‐antagonizing transcription factor (AATF) in various tumors, where it reinforces the generation and development of cancers and is linked to the clinical outcome. Nevertheless, the expression and influence of AATF in Wilms’ tumor (WT) is largely unknown. Here, we discovered that AATF expression was markedly increased in WT tissues as compared to the surrounding normal tissues. Elevated levels of AATF expression were related to tumor relapse and pulmonary metastasis, congruent with it being a predictor of clinical outcome in people suffering from WT. Proliferation, invasion, and migration of WT cells were suppressed by knockdown of AATF and promoted by AATF overexpression in vitro. Furthermore, the tumor generation capability of WT cells noticeably decreased after knockout of AATF in vivo. The phosphoinositide‐3‐kinase (PI3K)/AKT pathway modulated the activity of AATF in WT. The findings of our study indicate that AATF expression is increased in WT and can serve as a predictor of clinical outcome; in addition, it may enhance the development of WT via the PI3K/AKT axis and may be a promising marker for WT diagnosis and therapy.
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Affiliation(s)
- Peng Jing
- Department of Pediatric Surgery Affiliated Hospital of Northern Sichuan Medical College Nanchong China.,Department of Clinical Medicine North Sichuan Medical College Nanchong China
| | - Jiaqiong Zou
- Department of Clinical Laboratory the First Affiliated Hospital of Chengdu Medical College Nanchong China
| | - Kegui Weng
- Chongqing Cancer Institute Chongqing Cancer Hospital Chongqing University Cancer Hospital China
| | - Pei Peng
- Department of Clinical Laboratory the People's Hospital of Hanchuan/Hanchuan Hospital of People's Hospital Affiliated to Wuhan University China
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