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Ferretti A, Furlan M, Glinton KE, Fenger CD, Boschann F, Amlie-Wolf L, Zeidler S, Moretti R, Stoltenburg C, Tarquinio DC, Furia F, Parisi P, Rubboli G, Devinsky O, Mignot C, Gripp KW, Møller RS, Yang Y, Stankiewicz P, Gardella E. Epilepsy as a Novel Phenotype of BPTF-Related Disorders. Pediatr Neurol 2024; 158:17-25. [PMID: 38936258 DOI: 10.1016/j.pediatrneurol.2024.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 05/15/2024] [Accepted: 06/05/2024] [Indexed: 06/29/2024]
Abstract
BACKGROUND Neurodevelopmental disorder with dysmorphic facies and distal limb anomalies (NEDDFL) is associated to BPTF gene haploinsufficiency. Epilepsy was not included in the initial descriptions of NEDDFL, but emerging evidence indicates that epileptic seizures occur in some affected individuals. This study aims to investigate the electroclinical epilepsy features in individuals with NEDDFL. METHODS We enrolled individuals with BPTF-related seizures or interictal epileptiform discharges (IEDs) on electroencephalography (EEG). Demographic, clinical, genetic, raw EEG, and neuroimaging data as well as response to antiseizure medication were assessed. RESULTS We studied 11 individuals with a null variant in BPTF, including five previously unpublished ones. Median age at last observation was 9 years (range: 4 to 43 years). Eight individuals had epilepsy, one had a single unprovoked seizure, and two showed IEDs only. Key features included (1) early childhood epilepsy onset (median 4 years, range: 10 months to 7 years), (2) well-organized EEG background (all cases) and brief bursts of spikes and slow waves (50% of individuals), and (3) developmental delay preceding seizure onset. Spectrum of epilepsy severity varied from drug-resistant epilepsy (27%) to isolated IEDs without seizures (18%). Levetiracetam was widely used and reduced seizure frequency in 67% of the cases. CONCLUSIONS Our study provides the first characterization of BPTF-related epilepsy. Early-childhood-onset epilepsy occurs in 19% of subjects, all presenting with a well-organized EEG background associated with generalized interictal epileptiform abnormalities in half of these cases. Drug resistance is rare.
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Affiliation(s)
- Alessandro Ferretti
- Pediatrics Unit, Faculty of Medicine and Psychology, Department of Neuroscience, Mental Health and Sense Organs (NESMOS), Sapienza University of Rome, Rome, Italy; Department of Clinical Neurophysiology, Danish Epilepsy Centre, Dianalund, Denmark; Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Centre, Dianalund, Denmark
| | - Margherita Furlan
- Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Centre, Dianalund, Denmark; Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Kevin E Glinton
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Christina D Fenger
- Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Centre, Dianalund, Denmark; Amplexa Genetics A/S, Odense, Denmark
| | - Felix Boschann
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institut für Medizinische Genetik und Humangenetik, Berlin, Germany; Berlin Institute of Health, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Louise Amlie-Wolf
- Division of Medical Genetics, Nemours Children's Health, Wilmington, Delaware
| | - Shimriet Zeidler
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Raffaella Moretti
- APHP-Sorbonne Université, Département de Génétique, Hôpital Trousseau et Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Corinna Stoltenburg
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Sozialpädiatrisches Zentrum Neuropädiatrie, Berlin, Germany
| | - Daniel C Tarquinio
- Rett Syndrome Clinic, Center for Rare Neurological Diseases, Norcross, Georgia
| | - Francesca Furia
- Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Centre, Dianalund, Denmark; Faculty of Health Sciences, Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
| | - Pasquale Parisi
- Pediatrics Unit, Faculty of Medicine and Psychology, Department of Neuroscience, Mental Health and Sense Organs (NESMOS), Sapienza University of Rome, Rome, Italy
| | - Guido Rubboli
- Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Centre, Dianalund, Denmark; Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark; Member of ERN EpiCARE
| | - Orrin Devinsky
- NYU Langone Epilepsy Center, Department of Neurology, NYU Grossman School of Medicine, New York City, New York
| | - Cyril Mignot
- APHP-Sorbonne Université, Département de Génétique, Hôpital Trousseau et Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Karen W Gripp
- Division of Medical Genetics, Nemours Children's Health, Wilmington, Delaware
| | - Rikke S Møller
- Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Centre, Dianalund, Denmark; Faculty of Health Sciences, Department of Regional Health Research, University of Southern Denmark, Odense, Denmark; Member of ERN EpiCARE
| | - Yaping Yang
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, Texas; AiLife Diagnostics, Pearland, Texas
| | - Pawel Stankiewicz
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Elena Gardella
- Department of Clinical Neurophysiology, Danish Epilepsy Centre, Dianalund, Denmark; Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Centre, Dianalund, Denmark; Faculty of Health Sciences, Department of Regional Health Research, University of Southern Denmark, Odense, Denmark; Member of ERN EpiCARE.
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Wang D, Lu X, Jiang Y, Pan L, Zhu F, Yu A, Zhao M, Yang M, Bi J, He X, Liu H, Li J. The chromatin remodeling protein BPTF mediates cell cycle, proliferation and apoptosis in porcine ovarian granulosa cells. Theriogenology 2023; 211:172-181. [PMID: 37643502 DOI: 10.1016/j.theriogenology.2023.08.017] [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: 04/07/2023] [Revised: 08/22/2023] [Accepted: 08/22/2023] [Indexed: 08/31/2023]
Abstract
Bromodomain PHD finger transcription factor (BPTF), a core subunit of nucleosome-remodeling factor (NURF) complex, plays an important role in chromatin remodeling. However, few information of BPTF is available in pig, especially in mammalian follicular granulosa cells (GCs). The present study firstly confirmed that BPTF in porcine was relative close to human and mouse. The expression of BPTF could be detected in ovary, testes, lung, kidney, large intestine, and small intestine. And a relative high expression of BPTF was observed in ovarian follicles and GCs. When BPTF was knocked down (BPTF-siRNA), the viability of GCs was affected. And the expression level of CDK1, cyclin B1, CDK4 and CDK2 was higher than the control, which might indicate that the cell cycle of GCs was inhibited from S to G2/M phase. Although the apoptosis level was induced in the BPTF-siRNA GCs, the reduced level of H3K4 methylation was detected with the down regulation of SMYD3, EHMT2 and DPY30. Thereby, results in the present might provide the primary knowledge of BPTF in GCs and the follicular development in pig.
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Affiliation(s)
- Dayu Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Xinyue Lu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yuan Jiang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Linqing Pan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Fuquan Zhu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Aochen Yu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Mingyue Zhao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Meng Yang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Jiaying Bi
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Xu He
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Honglin Liu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Juan Li
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China.
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Wilson KD, Porter EG, Garcia BA. Reprogramming of the epigenome in neurodevelopmental disorders. Crit Rev Biochem Mol Biol 2022; 57:73-112. [PMID: 34601997 PMCID: PMC9462920 DOI: 10.1080/10409238.2021.1979457] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The etiology of neurodevelopmental disorders (NDDs) remains a challenge for researchers. Human brain development is tightly regulated and sensitive to cellular alterations caused by endogenous or exogenous factors. Intriguingly, the surge of clinical sequencing studies has revealed that many of these disorders are monogenic and monoallelic. Notably, chromatin regulation has emerged as highly dysregulated in NDDs, with many syndromes demonstrating phenotypic overlap, such as intellectual disabilities, with one another. Here we discuss epigenetic writers, erasers, readers, remodelers, and even histones mutated in NDD patients, predicted to affect gene regulation. Moreover, this review focuses on disorders associated with mutations in enzymes involved in histone acetylation and methylation, and it highlights syndromes involving chromatin remodeling complexes. Finally, we explore recently discovered histone germline mutations and their pathogenic outcome on neurological function. Epigenetic regulators are mutated at every level of chromatin organization. Throughout this review, we discuss mechanistic investigations, as well as various animal and iPSC models of these disorders and their usefulness in determining pathomechanism and potential therapeutics. Understanding the mechanism of these mutations will illuminate common pathways between disorders. Ultimately, classifying these disorders based on their effects on the epigenome will not only aid in prognosis in patients but will aid in understanding the role of epigenetic machinery throughout neurodevelopment.
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Affiliation(s)
- Khadija D. Wilson
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Elizabeth G. Porter
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Benjamin A. Garcia
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
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Li Y, Gong H, Wang P, Zhu Y, Peng H, Cui Y, Li H, Liu J, Wang Z. The emerging role of ISWI chromatin remodeling complexes in cancer. J Exp Clin Cancer Res 2021; 40:346. [PMID: 34736517 PMCID: PMC8567610 DOI: 10.1186/s13046-021-02151-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 10/21/2021] [Indexed: 12/30/2022] Open
Abstract
Disordered chromatin remodeling regulation has emerged as an essential driving factor for cancers. Imitation switch (ISWI) family are evolutionarily conserved ATP-dependent chromatin remodeling complexes, which are essential for cellular survival and function through multiple genetic and epigenetic mechanisms. Omics sequencing and a growing number of basic and clinical studies found that ISWI family members displayed widespread gene expression and genetic status abnormalities in human cancer. Their aberrant expression is closely linked to patient outcome and drug response. Functional or componential alteration in ISWI-containing complexes is critical for tumor initiation and development. Furthermore, ISWI-non-coding RNA regulatory networks and some non-coding RNAs derived from exons of ISWI member genes play important roles in tumor progression. Therefore, unveiling the transcriptional regulation mechanism underlying ISWI family sparked a booming interest in finding ISWI-based therapies in cancer. This review aims at describing the current state-of-the-art in the role of ISWI subunits and complexes in tumorigenesis, tumor progression, immunity and drug response, and presenting deep insight into the physiological and pathological implications of the ISWI transcription machinery in cancers.
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Affiliation(s)
- Yanan Li
- Department of Hematology, Institute of Molecular Hematology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
- Molecular Biology Research Center and Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Han Gong
- Department of Hematology, Institute of Molecular Hematology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
- Molecular Biology Research Center and Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Pan Wang
- Department of Hematology, Institute of Molecular Hematology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
- Molecular Biology Research Center and Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Yu Zhu
- Molecular Biology Research Center and Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Hongling Peng
- Department of Hematology, Institute of Molecular Hematology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Yajuan Cui
- Department of Hematology, Institute of Molecular Hematology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Heng Li
- Department of Hematology, Institute of Molecular Hematology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Jing Liu
- Molecular Biology Research Center and Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Zi Wang
- Department of Hematology, Institute of Molecular Hematology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
- Molecular Biology Research Center and Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, 410078, Hunan, China.
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Zhang R, Feng Y, Lu J, Ge Y, Li H. lncRNA Ttc3-209 Promotes the Apoptosis of Retinal Ganglion Cells in Retinal Ischemia Reperfusion Injury by Targeting the miR-484/Wnt8a Axis. Invest Ophthalmol Vis Sci 2021; 62:13. [PMID: 33687475 PMCID: PMC7960841 DOI: 10.1167/iovs.62.3.13] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Purpose Apoptosis of the retinal ganglion cells (RGCs) can cause irreversible damage to visual function after retinal ischemia reperfusion injury (RIR). Using a lncRNA chip assay, we selected lncRNA Ttc-209 and characterized its role in RGCs during ischemia reperfusion (I/R)–induced apoptosis. Methods We created an ischemic model of RGCs by applying Hank's balanced salt solution containing 10 µM antimycin A and 2 µM calcium ionophore for 2 hours. RIR was induced in mice by elevating the intraocular pressure to 120 mm Hg for 1 hour by cannulation of the cornea; this was followed by reperfusion. Real-time quantitative PCR was used to detect the expression levels of long noncoding RNA (lncRNA), microRNA (miRNA), and target gene mRNA. Western blotting, flow cytometry, immunofluorescent staining, and TUNEL assays were performed to detect cell apoptosis. Dual-luciferase reporter assays and FISH were used to identify endogenous competitive RNA (ceRNA) mechanisms that link lncRNAs, miRNAs, and target genes. We also used scotopic electroretinography examinations to evaluate visual function in treated mice. Results lncRNA Ttc3-209 was significantly upregulated after I/R injury and played a proapoptotic role in RGCs during I/R-induced apoptosis. Mechanistically, lncRNA Ttc3-209 is a ceRNA that competitively binds to miR-484 and upregulates the translation of its target (Wnt8a mRNA), thus promoting apoptosis in RGCs. Conclusions Reducing the expression of lncRNA Ttc3-209 had a protective effect against apoptosis in RGCs. This may provide a new therapeutic option for the prevention of RGC apoptosis in response to RIR injury.
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Affiliation(s)
- Ran Zhang
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410011, China
| | - Yuqing Feng
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410011, China
| | - Jinfang Lu
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410011, China
| | - Yanni Ge
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410011, China
| | - Huiling Li
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410011, China
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Xiong L, Mao X, Guo Y, Zhou Y, Chen M, Chen P, Yang S, Li L. Discovery of selective BPTF bromodomain inhibitors by screening and structure-based optimization. Biochem Biophys Res Commun 2021; 545:125-131. [PMID: 33548625 DOI: 10.1016/j.bbrc.2021.01.067] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 01/20/2021] [Indexed: 02/08/2023]
Abstract
Bromodomain and PHD finger containing transcription factor (BPTF) is a multidomain protein that regulates the transcription of chromatin and is related to many cancers. Herein, we report the screening-based discovery of Cpd1, a compound with micromolar affinity to the BPTF bromodomain. Through structure-guided optimization, we synthesized a variety of new inhibitors. Among these compounds, Cpd8 and Cpd10 were highly potent and selective inhibitors, with KD values of 428 nM and 655 nM in ITC assays, respectively. The high activity was explained by the cocrystal structure of Cpd8 in complex with the BPTF bromodomain protein. Cpd8 and Cpd10 were able to stabilize the BPTF bromodomain protein in cells in a cellular thermal shift assay (CETSA). Cpd8 downregulated c-MYC expression in A549 cells. All experiments prove that these two compounds are potential BPTF inhibitors.
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Affiliation(s)
- Liang Xiong
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Xin Mao
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Yinping Guo
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Yangli Zhou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Mingxin Chen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Pei Chen
- Key Laboratory of Drug Targeting and Drug Delivery System of Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Shengyong Yang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Linli Li
- Key Laboratory of Drug Targeting and Drug Delivery System of Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China.
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Yang Y, Wang C, Wei N, Hong T, Sun Z, Xiao J, Yao J, Li Z, Liu T. Identification of prognostic chromatin-remodeling genes in clear cell renal cell carcinoma. Aging (Albany NY) 2020; 12:25614-25642. [PMID: 33232269 PMCID: PMC7803503 DOI: 10.18632/aging.104170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 09/28/2020] [Indexed: 12/16/2022]
Abstract
The aim of this study was to investigate the effects of chromatin-remodeling genes on the prognosis of patients with clear cell renal cell carcinoma (ccRCC). In TCGA-KIRC patients, two subgroups based on 86 chromatin-remodeling genes were established. The random forest algorithm was used for feature selection to identify BPTF, SIN3A and CNOT1 as characterized chromatin remodelers in ccRCC with good prognostic value. YY1 was indicated to be a transcription factor of genes highly related to BPTF, SIN3A and CNOT1. Functional annotations indicated that BPTF, SIN3A, CNOT1 and YY1 are all involved in the ubiquitin-mediated proteolysis process and that high expression of any of the five associated E3 ubiquitin ligases found in the pathway suggests a good prognosis. Protein network analysis indicated that BPTF has a targeted regulatory effect on YY1. Another independent dataset from International Cancer Genome Consortium (ICGC) showed a strong consistency with results in TCGA. In conclusion, we demonstrate that BPTF, SIN3A and CNOT1 are novel prognostic factors that predict good survival in ccRCC. We predicted that the good prognostic value of chromatin-remodeling genes BPTF and SIN3A is related to the regulation of YY1 and that YY1 regulates E3 ubiquitin ligases for further degradation of oncoproteins in ccRCC.
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Affiliation(s)
- Yujing Yang
- Department of Medical Oncology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Chengyuan Wang
- Department of Urology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Ningde Wei
- Department of Urology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Ting Hong
- Department of Urology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Zuyu Sun
- Department of Urology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Jiawen Xiao
- Department of Medical Oncology, Shenyang Fifth People Hospital, Tiexi District, Shenyang 110001, P.R. China
| | - Jiaxi Yao
- Department of Urology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Zhi Li
- Department of Medical Oncology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Tao Liu
- Department of Urology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
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8
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Green AL, DeSisto J, Flannery P, Lemma R, Knox A, Lemieux M, Sanford B, O'Rourke R, Ramkissoon S, Jones K, Perry J, Hui X, Moroze E, Balakrishnan I, O'Neill AF, Dunn K, DeRyckere D, Danis E, Safadi A, Gilani A, Hubbell-Engler B, Nuss Z, Levy JMM, Serkova N, Venkataraman S, Graham DK, Foreman N, Ligon K, Jones K, Kung AL, Vibhakar R. BPTF regulates growth of adult and pediatric high-grade glioma through the MYC pathway. Oncogene 2020; 39:2305-2327. [PMID: 31844250 PMCID: PMC7071968 DOI: 10.1038/s41388-019-1125-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/15/2019] [Accepted: 11/20/2019] [Indexed: 02/07/2023]
Abstract
High-grade gliomas (HGG) afflict both children and adults and respond poorly to current therapies. Epigenetic regulators have a role in gliomagenesis, but a broad, functional investigation of the impact and role of specific epigenetic targets has not been undertaken. Using a two-step, in vitro/in vivo epigenomic shRNA inhibition screen, we determine the chromatin remodeler BPTF to be a key regulator of adult HGG growth. We then demonstrate that BPTF knockdown decreases HGG growth in multiple pediatric HGG models as well. BPTF appears to regulate tumor growth through cell self-renewal maintenance, and BPTF knockdown leads these glial tumors toward more neuronal characteristics. BPTF's impact on growth is mediated through positive effects on expression of MYC and MYC pathway targets. HDAC inhibitors synergize with BPTF knockdown against HGG growth. BPTF inhibition is a promising strategy to combat HGG through epigenetic regulation of the MYC oncogenic pathway.
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Affiliation(s)
- Adam L Green
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA.
- Center for Cancer and Blood Disorders, Children's Hospital Colorado, Aurora, CO, USA.
| | - John DeSisto
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | - Patrick Flannery
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | - Rakeb Lemma
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | - Aaron Knox
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | | | - Bridget Sanford
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | - Rebecca O'Rourke
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | | | | | | | - Xu Hui
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Erin Moroze
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | - Ilango Balakrishnan
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | | | | | - Deborah DeRyckere
- Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta/Emory University, Atlanta, GA, USA
| | - Etienne Danis
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | - Aaron Safadi
- Department of Radiology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Ahmed Gilani
- Department of Pathology, University of Colorado School of Medicine, Aurora, CO, USA
| | | | - Zachary Nuss
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | - Jean M Mulcahy Levy
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
- Center for Cancer and Blood Disorders, Children's Hospital Colorado, Aurora, CO, USA
| | - Natalie Serkova
- Department of Radiology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Sujatha Venkataraman
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | - Douglas K Graham
- Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta/Emory University, Atlanta, GA, USA
| | - Nicholas Foreman
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
- Center for Cancer and Blood Disorders, Children's Hospital Colorado, Aurora, CO, USA
| | - Keith Ligon
- Dana-Farber Cancer Institute, Boston, MA, USA
| | - Ken Jones
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
| | - Andrew L Kung
- Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Rajeev Vibhakar
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, RC1-N, Mail Stop 8302 12800 E. 19th Ave., Aurora, CO, 80045, USA
- Center for Cancer and Blood Disorders, Children's Hospital Colorado, Aurora, CO, USA
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9
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Pan Y, Yuan F, Li Y, Wang G, Lin Z, Chen L. Bromodomain PHD‑finger transcription factor promotes glioma progression and indicates poor prognosis. Oncol Rep 2018; 41:246-256. [PMID: 30542695 PMCID: PMC6278589 DOI: 10.3892/or.2018.6832] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 10/19/2018] [Indexed: 02/01/2023] Open
Abstract
Glioma is one of the most deadly central nervous system tumors around the world. Uncontrollable cell proliferation and invasion are key factors of cancer progression as well as glioma. Available evidence suggests that bromodomain PHD-finger transcription factor (BPTF) plays an important role in stem cell proliferation and differentiation, as well as in progression of some tumors, but there is little data on glioma. Therefore, the present study aimed to explore the functional role and potential clinical value of BPTF in glioma. Public database, real-time PCR and western blotting were used to detect the expression of BPTF in glioma tissue and cells. The relationship between BPTF with clinicopathological features and the prognosis of glioma patients was analyzed by immunohistochemical staining in 113 cases of paraffin-embedded primary glioma specimens. Furthermore, cytological experiments were conducted to elucidate the functional role of BPTF in glioma U251 cells, as well as the potential molecular mechanism. The expression of BPTF in glioma tissues was significantly higher than that in normal brain tissues. The association analysis results revealed that high BPTF expression was significantly associated with WHO grade and tumor size. Survival analysis revealed that the BPTF high-expression group had poorer overall survival (OS) and progression-free survival (PFS) compared with the low-expression group. Univariate and multivariate Cox regression analyses revealed that BPTF expression was an independent prognostic factor for the OS and PFS of glioma patients. Cytological experiments revealed that BPTF overexpression could significantly promote the proliferation, migration and invasion of human glioma U251 cells. A study of the underlying mechanism indicated that BPTF promoted glioma progression via MYC signaling. Our results preliminarily indicated that BPTF promoted glioma progression via MYC signaling and may be a potential prognostic biomarker and therapeutic target for glioma patients.
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Affiliation(s)
- Yanling Pan
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Feng Yuan
- Department of Radiation Oncology, Haikou People's Hospital, Haikou, Hainan 570208, P.R. China
| | - Yijie Li
- Department of Radiation Oncology, Haikou People's Hospital, Haikou, Hainan 570208, P.R. China
| | - Guoping Wang
- Department of Radiation Oncology, Haikou People's Hospital, Haikou, Hainan 570208, P.R. China
| | - Zhiren Lin
- Department of Radiation Oncology, Haikou People's Hospital, Haikou, Hainan 570208, P.R. China
| | - Longhua Chen
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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10
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Williams MLK, Sawada A, Budine T, Yin C, Gontarz P, Solnica-Krezel L. Gon4l regulates notochord boundary formation and cell polarity underlying axis extension by repressing adhesion genes. Nat Commun 2018; 9:1319. [PMID: 29615614 PMCID: PMC5882663 DOI: 10.1038/s41467-018-03715-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 03/06/2018] [Indexed: 01/15/2023] Open
Abstract
Anteroposterior (AP) axis extension during gastrulation requires embryonic patterning and morphogenesis to be spatiotemporally coordinated, but the underlying genetic mechanisms remain poorly understood. Here we define a role for the conserved chromatin factor Gon4l, encoded by ugly duckling (udu), in coordinating tissue patterning and axis extension during zebrafish gastrulation through direct positive and negative regulation of gene expression. Although identified as a recessive enhancer of impaired axis extension in planar cell polarity (PCP) mutants, udu functions in a genetically independent, partially overlapping fashion with PCP signaling to regulate mediolateral cell polarity underlying axis extension in part by promoting notochord boundary formation. Gon4l limits expression of the cell–cell and cell–matrix adhesion molecules EpCAM and Integrinα3b, excesses of which perturb the notochord boundary via tension-dependent and -independent mechanisms, respectively. By promoting formation of this AP-aligned boundary and associated cell polarity, Gon4l cooperates with PCP signaling to coordinate morphogenesis along the AP embryonic axis. Anteroposterior axis extension during gastrulation is dynamically coordinated, but how this is regulated at a molecular level is unclear. Here, the authors show in zebrafish that the chromatin factor Gon4l, encoded by ugly duckling, coordinates axis extension by modulating EpCAM and Integrinα3b expression.
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Affiliation(s)
- Margot L K Williams
- Department of Developmental Biology, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Atsushi Sawada
- Department of Developmental Biology, Washington University School of Medicine, Saint Louis, MO, 63110, USA.,Department of Biological Sciences, Vanderbilt University, Nashville, TN, 37235, USA
| | - Terin Budine
- Department of Developmental Biology, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Chunyue Yin
- Department of Biological Sciences, Vanderbilt University, Nashville, TN, 37235, USA.,Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital, Cincinnati, OH, 45229, USA
| | - Paul Gontarz
- Department of Developmental Biology, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Lilianna Solnica-Krezel
- Department of Developmental Biology, Washington University School of Medicine, Saint Louis, MO, 63110, USA. .,Department of Biological Sciences, Vanderbilt University, Nashville, TN, 37235, USA.
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11
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Duan C, Wang H, Chen Y, Chu P, Xing T, Gao C, Yue Z, Zheng J, Jin M, Gu W, Ma X. Whole exome sequencing reveals novel somatic alterations in neuroblastoma patients with chemotherapy. Cancer Cell Int 2018; 18:21. [PMID: 29467591 PMCID: PMC5816515 DOI: 10.1186/s12935-018-0521-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 02/12/2018] [Indexed: 12/19/2022] Open
Abstract
Background We ought to explore the acquired somatic alterations, shedding light on genetic basis of somatic alterations in NB patients with chemotherapy. Methods Marrow blood samples from NB patients were collected before treatment, after the 2nd and 4th chemotherapy for baseline research and continuous monitoring by whole exome sequencing. Plasma cell free DNA (cfDNA) was prepared for baseline research. Finger nail cells were extracted as self control. The clinical data was analyzed. Results From December 2014 to February 2016, 27 cases of children with stage IV NB were diagnosed. The follow up time ranged from 5 to 25 months, with a median follow up time of 17 months, 20 patients were stable, one patient died of pulmonary embolism during surgery, six patients died of disease progression. Marrow blood whole exome sequencing demonstrated that several novel somatic mutations were identified in all three trios comply or against the trendy of tumor size variation. Of note, six recurrent mutations in bromodomain PHD finger transcription factor (BPTF) were identified in nine NB patients under the continuous monitoring. The mutation rates variation was positively correlated to tumor size (CC = 0.428, P = 0.021), and patients with BPTF mutation may have a worse prognosis compared with wild type. Meanwhile, CGREF1, CUX2, GP1BA, SLC45A1 and TRA2A were mutated with the trendy oppose as therapeutic effects. The baseline research in three NB patients demonstrated that mutation rate of BPTF, TMCO3, GPRIN2 and C20orf96 in plasma cfDNA were in positive correlation with bone marrow genomic DNA (P = 0.001). Conclusions Our study showed that BPTF along with other mutations may function as a biomarker for evaluating to effects of chemotherapy to this refractory tumor, and patients with BPTF mutation might have a worse prognosis. Electronic supplementary material The online version of this article (10.1186/s12935-018-0521-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Chao Duan
- 1Beijing Key Laboratory of Pediatric Hematology Oncology, National Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No. 56 Nanlishi Road, Beijing, 100045 China
| | - Han Wang
- Joy Orient Translational Medicine Research Center for the Sequences Analysis and Blast, Beijing, China
| | - Ying Chen
- 1Beijing Key Laboratory of Pediatric Hematology Oncology, National Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No. 56 Nanlishi Road, Beijing, 100045 China
| | - Ping Chu
- 1Beijing Key Laboratory of Pediatric Hematology Oncology, National Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No. 56 Nanlishi Road, Beijing, 100045 China
| | - Tianyu Xing
- 1Beijing Key Laboratory of Pediatric Hematology Oncology, National Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No. 56 Nanlishi Road, Beijing, 100045 China
| | - Chao Gao
- 1Beijing Key Laboratory of Pediatric Hematology Oncology, National Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No. 56 Nanlishi Road, Beijing, 100045 China
| | - Zhixia Yue
- 1Beijing Key Laboratory of Pediatric Hematology Oncology, National Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No. 56 Nanlishi Road, Beijing, 100045 China
| | - Jie Zheng
- 1Beijing Key Laboratory of Pediatric Hematology Oncology, National Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No. 56 Nanlishi Road, Beijing, 100045 China
| | - Mei Jin
- 1Beijing Key Laboratory of Pediatric Hematology Oncology, National Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No. 56 Nanlishi Road, Beijing, 100045 China
| | - Weiyue Gu
- Joy Orient Translational Medicine Research Center for the Sequences Analysis and Blast, Beijing, China
| | - Xiaoli Ma
- 1Beijing Key Laboratory of Pediatric Hematology Oncology, National Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No. 56 Nanlishi Road, Beijing, 100045 China
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12
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Wei S, Wang Q. Molecular regulation of Nodal signaling during mesendoderm formation. Acta Biochim Biophys Sin (Shanghai) 2018; 50:74-81. [PMID: 29206913 DOI: 10.1093/abbs/gmx128] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 11/09/2017] [Indexed: 01/17/2023] Open
Abstract
One of the most important events during vertebrate embryogenesis is the formation or specification of the three germ layers, endoderm, mesoderm, and ectoderm. After a series of rapid cleavages, embryos form the mesendoderm and ectoderm during late blastulation and early gastrulation. The mesendoderm then further differentiates into the mesoderm and endoderm. Nodal, a member of the transforming growth factor β (TGF-β) superfamily, plays a pivotal role in mesendoderm formation by regulating the expression of a number of critical transcription factors, including Mix-like, GATA, Sox, and Fox. Because the Nodal signal transduction pathway is well-characterized, increasing effort has been made to delineate the spatiotemporal modulation of Nodal signaling during embryonic development. In this review, we summarize the recent progress delineating molecular regulation of Nodal signal intensity and duration during mesendoderm formation.
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Affiliation(s)
- Shi Wei
- The State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
| | - Qiang Wang
- State Key Laboratory of Membrane Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
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13
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Goodwin LR, Picketts DJ. The role of ISWI chromatin remodeling complexes in brain development and neurodevelopmental disorders. Mol Cell Neurosci 2017; 87:55-64. [PMID: 29249292 DOI: 10.1016/j.mcn.2017.10.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 10/04/2017] [Accepted: 10/26/2017] [Indexed: 10/18/2022] Open
Abstract
The mammalian ISWI (Imitation Switch) genes SMARCA1 and SMARCA5 encode the ATP-dependent chromatin remodeling proteins SNF2L and SNF2H. The ISWI proteins interact with BAZ (bromodomain adjacent to PHD zinc finger) domain containing proteins to generate eight distinct remodeling complexes. ISWI complex-mediated nucleosome positioning within genes and gene regulatory elements is proving important for the transition from a committed progenitor state to a differentiated cell state. Genetic studies have implicated the involvement of many ATP-dependent chromatin remodeling proteins in neurodevelopmental disorders (NDDs), including SMARCA1. Here we review the characterization of mice inactivated for ISWI and their interacting proteins, as it pertains to brain development and disease. A better understanding of chromatin dynamics during neural development is a prerequisite to understanding disease pathologies and the development of therapeutics for these complex disorders.
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Affiliation(s)
- Laura R Goodwin
- Regenerative Medicine Program, Ottawa Hospital Research Institute, 501 Smyth Road, Ottawa, ON K1H 8L6, Canada; Department of Biochemistry, Microbiology & Immunology, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada
| | - David J Picketts
- Regenerative Medicine Program, Ottawa Hospital Research Institute, 501 Smyth Road, Ottawa, ON K1H 8L6, Canada; Department of Biochemistry, Microbiology & Immunology, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; Department of Cellular and Molecular Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; Department of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada.
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14
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Haploinsufficiency of the Chromatin Remodeler BPTF Causes Syndromic Developmental and Speech Delay, Postnatal Microcephaly, and Dysmorphic Features. Am J Hum Genet 2017; 101:503-515. [PMID: 28942966 DOI: 10.1016/j.ajhg.2017.08.014] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 08/10/2017] [Indexed: 12/13/2022] Open
Abstract
Bromodomain PHD finger transcription factor (BPTF) is the largest subunit of nucleosome remodeling factor (NURF), a member of the ISWI chromatin-remodeling complex. However, the clinical consequences of disruption of this complex remain largely uncharacterized. BPTF is required for anterior-posterior axis formation of the mouse embryo and was shown to promote posterior neuroectodermal fate by enhancing Smad2-activated wnt8 expression in zebrafish. Here, we report eight loss-of-function and two missense variants (eight de novo and two of unknown origin) in BPTF on 17q24.2. The BPTF variants were found in unrelated individuals aged between 2.1 and 13 years, who manifest variable degrees of developmental delay/intellectual disability (10/10), speech delay (10/10), postnatal microcephaly (7/9), and dysmorphic features (9/10). Using CRISPR-Cas9 genome editing of bptf in zebrafish to induce a loss of gene function, we observed a significant reduction in head size of F0 mutants compared to control larvae. Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) and phospho-histone H3 (PH3) staining to assess apoptosis and cell proliferation, respectively, showed a significant increase in cell death in F0 mutants compared to controls. Additionally, we observed a substantial increase of the ceratohyal angle of the craniofacial skeleton in bptf F0 mutants, indicating abnormal craniofacial patterning. Taken together, our data demonstrate the pathogenic role of BPTF haploinsufficiency in syndromic neurodevelopmental anomalies and extend the clinical spectrum of human disorders caused by ablation of chromatin remodeling complexes.
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15
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The guanine nucleotide exchange factor Net1 facilitates the specification of dorsal cell fates in zebrafish embryos by promoting maternal β-catenin activation. Cell Res 2016; 27:202-225. [PMID: 27910850 DOI: 10.1038/cr.2016.141] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Revised: 09/18/2016] [Accepted: 09/27/2016] [Indexed: 12/14/2022] Open
Abstract
Wnt/β-catenin signaling is essential for the initiation of dorsal-ventral patterning during vertebrate embryogenesis. Maternal β-catenin accumulates in dorsal marginal nuclei during cleavage stages, but its critical target genes essential for dorsalization are silent until mid-blastula transition (MBT). Here, we find that zebrafish net1, a guanine nucleotide exchange factor, is specifically expressed in dorsal marginal blastomeres after MBT, and acts as a zygotic factor to promote the specification of dorsal cell fates. Loss- and gain-of-function experiments show that the GEF activity of Net1 is required for the activation of Wnt/β-catenin signaling in zebrafish embryos and mammalian cells. Net1 dissociates and activates PAK1 dimers, and PAK1 kinase activation causes phosphorylation of S675 of β-catenin after MBT, which ultimately leads to the transcription of downstream target genes. In summary, our results reveal that Net1-regulated β-catenin activation plays a crucial role in the dorsal axis formation during zebrafish development.
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16
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Wei S, Shang H, Cao Y, Wang Q. The coiled-coil domain containing protein Ccdc136b antagonizes maternal Wnt/β-catenin activity during zebrafish dorsoventral axial patterning. J Genet Genomics 2016; 43:431-8. [PMID: 27477027 DOI: 10.1016/j.jgg.2016.05.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 04/05/2016] [Accepted: 05/09/2016] [Indexed: 01/09/2023]
Abstract
The coiled-coil domain containing protein CCDC136 is a putative tumor suppressor and significantly down-regulated in gastric and colorectal cancer tissues. However, little is known about its biological functions during vertebrate embryo development. Zebrafish has two CCDC136 orthologs, ccdc136a and ccdc136b, but only ccdc136b is highly expressed during early embryonic development. In this study, we demonstrate that ccdc136b is required for dorsal-ventral axial patterning in zebrafish embryos. ccdc136b morphants display strongly dorsalized phenotypes. Loss- and gain-of-function experiments in zebrafish embryos and mammalian cells show that Ccdc136b is a crucial negative regulator of the Wnt/β-catenin signaling pathway, and plays a critical role in the establishment of the dorsal-ventral axis. We further find that Ccdc136b interacts with APC, promotes the binding affinity of APC with β-catenin and then facilitates the turnover of β-catenin. These results provide the first evidence that CCDC136 regulates zebrafish dorsal-ventral patterning by antagonizing Wnt/β-catenin signal transduction and suggest a potential mechanism underlying its suppressive activity in carcinogenesis.
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Affiliation(s)
- Shi Wei
- State Key Laboratory of Membrane Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Hanqiao Shang
- State Key Laboratory of Membrane Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yu Cao
- State Key Laboratory of Membrane Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Qiang Wang
- State Key Laboratory of Membrane Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
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