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Wu R, Li X, Meng Z, Li P, He Z, Liang L. Phenotypic and genetic analysis of children with unexplained neurodevelopmental delay and neurodevelopmental comorbidities in a Chinese cohort using trio-based whole-exome sequencing. Orphanet J Rare Dis 2024; 19:205. [PMID: 38764027 PMCID: PMC11103872 DOI: 10.1186/s13023-024-03214-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 05/10/2024] [Indexed: 05/21/2024] Open
Abstract
BACKGROUND Trio-based whole-exome sequencing (trio-WES) enables identification of pathogenic variants, including copy-number variants (CNVs), in children with unexplained neurodevelopmental delay (NDD) and neurodevelopmental comorbidities (NDCs), including autism spectrum disorder (ASD), epilepsy, and attention deficit hyperactivity disorder. Further phenotypic and genetic analysis on trio-WES-tested NDD-NDCs cases may help to identify key phenotypic factors related to higher diagnostic yield of using trio-WES and novel risk genes associated with NDCs in clinical settings. METHODS In this study, we retrospectively performed phenotypic analysis on 163 trio-WES-tested NDD-NDCs children to determine the phenotypic differences between genetically diagnosed and non-genetically diagnosed groups. Additionally, we conducted genetic analysis of ASD genes with the help of Simons Foundation for Autism Research Institute (SFARI) Gene database to identify novel possible ASD-risk genes underlying genetic NDD conditions. RESULTS Among these 163 patients, pathogenic variants were identified in 82 cases (82/163, 50.3%), including 20 cases with CNVs. By comparing phenotypic variables between genetically diagnosed group (82 cases) and non-genetically diagnosed group (81 cases) with multivariate binary logistic regression analysis, we revealed that NDD-NDCs cases presenting with severe-profound NDD [53/82 vs 17/81, adjusted-OR (95%CI): 4.865 (2.213 - 10.694), adjusted-P < 0.001] or having multiple NDCs [26/82 vs 8/81, adjusted-OR (95%CI): 3.731 (1.399 - 9.950), adjusted-P = 0.009] or accompanying ASD [64/82 vs 35/81, adjusted-OR (95%CI): 3.256 (1.479 - 7.168), adjusted-P = 0.003] and head circumference abnormality [33/82 vs 11/81, adjusted-OR (95%CI): 2.788 (1.148 - 6.774), adjusted-P = 0.024] were more likely to have a genetic diagnosis using trio-WES. Moreover, 37 genes with monogenetic variants were identified in 48 patients genetically diagnosed with NDD-ASD, and 15 dosage-sensitive genes were identified in 16 individuals with NDD-ASD carrying CNVs. Most of those genes had been proven to be ASD-related genes. However, some of them (9 genes) were not proven sufficiently to correlate with ASD. By literature review and constructing protein-protein interaction networks among these 9 candidate ASD-risk genes and 102 established ASD genes obtained from the SFARI Gene database, we identified CUL4B, KCNH1, and PLA2G6 as novel possible ASD-risk genes underlying genetic NDD conditions. CONCLUSIONS Trio-WES testing is recommended for patients with unexplained NDD-NDCs that have severe-profound NDD or multiple NDCs, particularly those with accompanying ASD and head circumference abnormality, as these independent factors may increase the likelihood of genetic diagnosis using trio-WES. Moreover, NDD patients with pathogenic variants in CUL4B, KCNH1 and PLA2G6 should be aware of potential risks of developing ASD during their disease courses.
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Affiliation(s)
- Ruohao Wu
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, Guangdong, China
- Children's Medical Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou Guangdong, 510120, China
| | - Xiaojuan Li
- Department of Research and Molecular Diagnostics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, Guangdong, China
| | - Zhe Meng
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, Guangdong, China
- Children's Medical Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou Guangdong, 510120, China
| | - Pinggan Li
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, Guangdong, China
- Children's Medical Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou Guangdong, 510120, China
| | - Zhanwen He
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, Guangdong, China.
- Children's Medical Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou Guangdong, 510120, China.
| | - Liyang Liang
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, Guangdong, China.
- Children's Medical Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou Guangdong, 510120, China.
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2
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Ma Y, Liu X, Zhou M, Sun W, Jiang B, Liu Q, Wang M, Zou Y, Liu Q, Gong Y, Sun G. CUL4B mutations impair human cortical neurogenesis through PP2A-dependent inhibition of AKT and ERK. Cell Death Dis 2024; 15:121. [PMID: 38331954 PMCID: PMC10853546 DOI: 10.1038/s41419-024-06501-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/10/2024]
Abstract
Mutation in CUL4B gene is one of the most common causes for X-linked intellectual disability (XLID). CUL4B is the scaffold protein in CUL4B-RING ubiquitin ligase (CRL4B) complex. While the roles of CUL4B in cancer progression and some developmental processes like adipogenesis, osteogenesis, and spermatogenesis have been studied, the mechanisms underlying the neurological disorders in patients with CUL4B mutations are poorly understood. Here, using 2D neuronal culture and cerebral organoids generated from the patient-derived induced pluripotent stem cells and their isogenic controls, we demonstrate that CUL4B is required to prevent premature cell cycle exit and precocious neuronal differentiation of neural progenitor cells. Moreover, loss-of-function mutations of CUL4B lead to increased synapse formation and enhanced neuronal excitability. Mechanistically, CRL4B complex represses transcription of PPP2R2B and PPP2R2C genes, which encode two isoforms of the regulatory subunit of protein phosphatase 2 A (PP2A) complex, through catalyzing monoubiquitination of H2AK119 in their promoter regions. CUL4B mutations result in upregulated PP2A activity, which causes inhibition of AKT and ERK, leading to premature cell cycle exit. Activation of AKT and ERK or inhibition of PP2A activity in CUL4B mutant organoids rescues the neurogenesis defect. Our work unveils an essential role of CUL4B in human cortical development.
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Affiliation(s)
- Yanyan Ma
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Xiaolin Liu
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Min Zhou
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Wenjie Sun
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Baichun Jiang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Qiao Liu
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Molin Wang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Yongxin Zou
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Qiji Liu
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
| | - Gongping Sun
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Histology and Embryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
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3
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Edey J, Soleimani-Nouri P, Dawson-Kavanagh A, Imran Azeem MS, Episkopou V. X-linked neuronal migration disorders: Gender differences and insights for genetic screening. Int J Dev Neurosci 2023; 83:581-599. [PMID: 37574439 DOI: 10.1002/jdn.10290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 06/23/2023] [Accepted: 07/14/2023] [Indexed: 08/15/2023] Open
Abstract
Cortical development depends on neuronal migration of both excitatory and inhibitory interneurons. Neuronal migration disorders (NMDs) are conditions characterised by anatomical cortical defects leading to varying degrees of neurocognitive impairment, developmental delay and seizures. Refractory epilepsy affects 15 million people worldwide, and it is thought that cortical developmental disorders are responsible for 25% of childhood cases. However, little is known about the epidemiology of these disorders, nor are their aetiologies fully understood, though many are associated with sporadic genetic mutations. In this review, we aim to highlight X-linked NMDs including lissencephaly, periventricular nodular heterotopia and polymicrogyria because of their mostly familial inheritance pattern. We focus on the most prominent genes responsible: including DCX, ARX, FLNA, FMR1, L1CAM, SRPX2, DDX3X, NSHDL, CUL4B and OFD1, outlining what is known about their prevalence among NMDs, and the underlying pathophysiology. X-linked disorders are important to recognise clinically, as females often have milder phenotypes. Consequently, there is a greater chance they survive to reproductive age and risk passing the mutations down. Effective genetic screening is important to prevent and treat these conditions, and for this, we need to know gene mutations and have a clear understanding of the function of the genes involved. This review summarises the knowledge base and provides clear direction for future work by both scientists and clinicians alike.
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Affiliation(s)
- Juliet Edey
- Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, London, UK
| | - Payam Soleimani-Nouri
- Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, London, UK
| | | | | | - Vasso Episkopou
- Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, London, UK
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4
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Stier A, Gilberto S, Mohamed WI, Royall LN, Helenius J, Mikicic I, Sajic T, Beli P, Müller DJ, Jessberger S, Peter M. The CUL4B-based E3 ubiquitin ligase regulates mitosis and brain development by recruiting phospho-specific DCAFs. EMBO J 2023; 42:e112847. [PMID: 37365982 PMCID: PMC10476281 DOI: 10.15252/embj.2022112847] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 05/31/2023] [Accepted: 06/13/2023] [Indexed: 06/28/2023] Open
Abstract
The paralogs CUL4A and CUL4B assemble cullin-RING E3 ubiquitin ligase (CRL) complexes regulating multiple chromatin-associated cellular functions. Although they are structurally similar, we found that the unique N-terminal extension of CUL4B is heavily phosphorylated during mitosis, and the phosphorylation pattern is perturbed in the CUL4B-P50L mutation causing X-linked intellectual disability (XLID). Phenotypic characterization and mutational analysis revealed that CUL4B phosphorylation is required for efficient progression through mitosis, controlling spindle positioning and cortical tension. While CUL4B phosphorylation triggers chromatin exclusion, it promotes binding to actin regulators and to two previously unrecognized CUL4B-specific substrate receptors (DCAFs), LIS1 and WDR1. Indeed, co-immunoprecipitation experiments and biochemical analysis revealed that LIS1 and WDR1 interact with DDB1, and their binding is enhanced by the phosphorylated N-terminal domain of CUL4B. Finally, a human forebrain organoid model demonstrated that CUL4B is required to develop stable ventricular structures that correlate with onset of forebrain differentiation. Together, our study uncovers previously unrecognized DCAFs relevant for mitosis and brain development that specifically bind CUL4B, but not the CUL4B-P50L patient mutant, by a phosphorylation-dependent mechanism.
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Affiliation(s)
- Anna Stier
- Institute of BiochemistryETH ZurichZurichSwitzerland
| | - Samuel Gilberto
- Institute of BiochemistryETH ZurichZurichSwitzerland
- Present address:
Monte Rosa TherapeuticsBaselSwitzerland
| | | | - Lars N Royall
- Brain Research InstituteUniversity of ZurichZurichSwitzerland
| | - Jonne Helenius
- Department of Biosystems Science and EngineeringETH ZurichBaselSwitzerland
| | | | - Tatjana Sajic
- Institute of Molecular Systems BiologyETH ZürichZürichSwitzerland
- Present address:
Faculty Unit of Toxicology, CURML, Faculty of Biology and MedicineUniversity of LausanneLausanneSwitzerland
| | - Petra Beli
- Institute of Molecular BiologyMainzGermany
- Institute of Developmental Biology and Neurobiology (IDN)Johannes Gutenberg UniversityMainzGermany
| | - Daniel J Müller
- Department of Biosystems Science and EngineeringETH ZurichBaselSwitzerland
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5
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Kaplow IM, Lawler AJ, Schäffer DE, Srinivasan C, Sestili HH, Wirthlin ME, Phan BN, Prasad K, Brown AR, Zhang X, Foley K, Genereux DP, Karlsson EK, Lindblad-Toh K, Meyer WK, Pfenning AR, Andrews G, Armstrong JC, Bianchi M, Birren BW, Bredemeyer KR, Breit AM, Christmas MJ, Clawson H, Damas J, Di Palma F, Diekhans M, Dong MX, Eizirik E, Fan K, Fanter C, Foley NM, Forsberg-Nilsson K, Garcia CJ, Gatesy J, Gazal S, Genereux DP, Goodman L, Grimshaw J, Halsey MK, Harris AJ, Hickey G, Hiller M, Hindle AG, Hubley RM, Hughes GM, Johnson J, Juan D, Kaplow IM, Karlsson EK, Keough KC, Kirilenko B, Koepfli KP, Korstian JM, Kowalczyk A, Kozyrev SV, Lawler AJ, Lawless C, Lehmann T, Levesque DL, Lewin HA, Li X, Lind A, Lindblad-Toh K, Mackay-Smith A, Marinescu VD, Marques-Bonet T, Mason VC, Meadows JRS, Meyer WK, Moore JE, Moreira LR, Moreno-Santillan DD, Morrill KM, Muntané G, Murphy WJ, Navarro A, Nweeia M, Ortmann S, Osmanski A, Paten B, Paulat NS, Pfenning AR, Phan BN, Pollard KS, Pratt HE, Ray DA, Reilly SK, Rosen JR, Ruf I, Ryan L, Ryder OA, Sabeti PC, Schäffer DE, Serres A, Shapiro B, Smit AFA, Springer M, Srinivasan C, Steiner C, Storer JM, Sullivan KAM, Sullivan PF, Sundström E, Supple MA, Swofford R, Talbot JE, Teeling E, Turner-Maier J, Valenzuela A, Wagner F, Wallerman O, Wang C, Wang J, Weng Z, Wilder AP, Wirthlin ME, Xue JR, Zhang X. Relating enhancer genetic variation across mammals to complex phenotypes using machine learning. Science 2023; 380:eabm7993. [PMID: 37104615 DOI: 10.1126/science.abm7993] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Protein-coding differences between species often fail to explain phenotypic diversity, suggesting the involvement of genomic elements that regulate gene expression such as enhancers. Identifying associations between enhancers and phenotypes is challenging because enhancer activity can be tissue-dependent and functionally conserved despite low sequence conservation. We developed the Tissue-Aware Conservation Inference Toolkit (TACIT) to associate candidate enhancers with species' phenotypes using predictions from machine learning models trained on specific tissues. Applying TACIT to associate motor cortex and parvalbumin-positive interneuron enhancers with neurological phenotypes revealed dozens of enhancer-phenotype associations, including brain size-associated enhancers that interact with genes implicated in microcephaly or macrocephaly. TACIT provides a foundation for identifying enhancers associated with the evolution of any convergently evolved phenotype in any large group of species with aligned genomes.
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Affiliation(s)
- Irene M Kaplow
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA, USA
- Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Alyssa J Lawler
- Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA, USA
- Department of Biology, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Daniel E Schäffer
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Chaitanya Srinivasan
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Heather H Sestili
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Morgan E Wirthlin
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA, USA
- Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA, USA
| | - BaDoi N Phan
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA, USA
- Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA, USA
- Medical Scientist Training Program, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Kavya Prasad
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Ashley R Brown
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Xiaomeng Zhang
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Kathleen Foley
- Department of Biological Sciences, Lehigh University, Bethlehem, PA, USA
| | - Diane P Genereux
- Broad Institute, Cambridge, MA, USA
- Program in Bioinformatics and Integrative Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Elinor K Karlsson
- Broad Institute, Cambridge, MA, USA
- Program in Bioinformatics and Integrative Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Kerstin Lindblad-Toh
- Broad Institute, Cambridge, MA, USA
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Wynn K Meyer
- Department of Biological Sciences, Lehigh University, Bethlehem, PA, USA
| | - Andreas R Pfenning
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA, USA
- Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA, USA
- Department of Biology, Carnegie Mellon University, Pittsburgh, PA, USA
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6
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Kampmeier A, Leitão E, Parenti I, Beygo J, Depienne C, Bramswig NC, Hsieh TC, Afenjar A, Beck-Wödl S, Grasshoff U, Haack TB, Bijlsma EK, Ruivenkamp C, Lausberg E, Elbracht M, Haanpää MK, Koillinen H, Heinrich U, Rost I, Jamra RA, Popp D, Koch-Hogrebe M, Rostasy K, López-González V, Sanchez-Soler MJ, Macedo C, Schmetz A, Steinborn C, Weidensee S, Lesmann H, Marbach F, Caro P, Schaaf CP, Krawitz P, Wieczorek D, Kaiser FJ, Kuechler A. PHIP-associated Chung-Jansen syndrome: Report of 23 new individuals. Front Cell Dev Biol 2023; 10:1020609. [PMID: 36726590 PMCID: PMC9886139 DOI: 10.3389/fcell.2022.1020609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 11/16/2022] [Indexed: 01/18/2023] Open
Abstract
In 2016 and 2018, Chung, Jansen and others described a new syndrome caused by haploinsufficiency of PHIP (pleckstrin homology domain interacting protein, OMIM *612,870) and mainly characterized by developmental delay (DD), learning difficulties/intellectual disability (ID), behavioral abnormalities, facial dysmorphism and obesity (CHUJANS, OMIM #617991). So far, PHIP alterations appear to be a rare cause of DD/ID. "Omics" technologies such as exome sequencing or array analyses have led to the identification of distinct types of alterations of PHIP, including, truncating variants, missense substitutions, splice variants and large deletions encompassing portions of the gene or the entire gene as well as adjacent genomic regions. We collected clinical and genetic data of 23 individuals with PHIP-associated Chung-Jansen syndrome (CHUJANS) from all over Europe. Follow-up investigations (e.g. Sanger sequencing, qPCR or Fluorescence-in-situ-Hybridization) and segregation analysis showed either de novo occurrence or inheritance from an also (mildly) affected parent. In accordance with previously described patients, almost all individuals reported here show developmental delay (22/23), learning disability or ID (22/23), behavioral abnormalities (20/23), weight problems (13/23) and characteristic craniofacial features (i.e. large ears/earlobes, prominent eyebrows, anteverted nares and long philtrum (23/23)). To further investigate the facial gestalt of individuals with CHUJANS, we performed facial analysis using the GestaltMatcher approach. By this, we could establish that PHIP patients are indistinguishable based on the type of PHIP alteration (e.g. missense, loss-of-function, splice site) but show a significant difference to the average face of healthy individuals as well as to individuals with Prader-Willi syndrome (PWS, OMIM #176270) or with a CUL4B-alteration (Intellectual developmental disorder, X-linked, syndromic, Cabezas type, OMIM #300354). Our findings expand the mutational and clinical spectrum of CHUJANS. We discuss the molecular and clinical features in comparison to the published individuals. The fact that some variants were inherited from a mildly affected parent further illustrates the variability of the associated phenotype and outlines the importance of a thorough clinical evaluation combined with genetic analyses for accurate diagnosis and counselling.
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Affiliation(s)
- Antje Kampmeier
- Institut für Humangenetik, Universitätsmedizin Essen, Universität Duisburg-Essen, Essen, Germany,*Correspondence: Antje Kampmeier, ; Alma Kuechler,
| | - Elsa Leitão
- Institut für Humangenetik, Universitätsmedizin Essen, Universität Duisburg-Essen, Essen, Germany
| | - Ilaria Parenti
- Institut für Humangenetik, Universitätsmedizin Essen, Universität Duisburg-Essen, Essen, Germany
| | - Jasmin Beygo
- Institut für Humangenetik, Universitätsmedizin Essen, Universität Duisburg-Essen, Essen, Germany
| | - Christel Depienne
- Institut für Humangenetik, Universitätsmedizin Essen, Universität Duisburg-Essen, Essen, Germany
| | - Nuria C Bramswig
- Institut für Humangenetik, Universitätsmedizin Essen, Universität Duisburg-Essen, Essen, Germany
| | - Tzung-Chien Hsieh
- Institut für Genomische Statistik und Bioinformatik, Universitätsklinikum Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
| | - Alexandra Afenjar
- Département de génétique et embryologie médicale, Centre de Référence Malformations et maladies congénitales du cervelet et déficiences intellectuelles de causes rares, Hôpital Trousseau, APHP Sorbonne Université, Paris, France
| | - Stefanie Beck-Wödl
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Ute Grasshoff
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Tobias B Haack
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Emilia K Bijlsma
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, Netherlands
| | - Claudia Ruivenkamp
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, Netherlands
| | - Eva Lausberg
- Institut für Humangenetik und Genommedizin, Uniklinik RWTH Aachen, Aachen, Germany
| | - Miriam Elbracht
- Institut für Humangenetik und Genommedizin, Uniklinik RWTH Aachen, Aachen, Germany
| | - Maria K Haanpää
- Clinical Genetics Unit, Turku University Hospital, Turku, Finland,Department of Genomics, Turku University Hospital, Turku, Finland
| | - Hannele Koillinen
- Clinical Genetics Unit, Turku University Hospital, Turku, Finland,Institute of Biomedicine, University of Turku, Turku, Finland
| | - Uwe Heinrich
- Zentrum für Humangenetik und Laboratoriumsdiagnostik Dr. Klein Dr. Rost und Kollegen, Martinsried, Germany
| | - Imma Rost
- Zentrum für Humangenetik und Laboratoriumsdiagnostik Dr. Klein Dr. Rost und Kollegen, Martinsried, Germany
| | - Rami Abou Jamra
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Denny Popp
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Margarete Koch-Hogrebe
- Vestische Kinder- und Jugendklinik Datteln, Abteilung für Neuropädiatrie, Datteln, Germany
| | - Kevin Rostasy
- Vestische Kinder- und Jugendklinik Datteln, Abteilung für Neuropädiatrie, Datteln, Germany
| | - Vanesa López-González
- Sección Genética Médica, Servicio de Pediatría, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain,Sección de Genética Médica, Servicio de Pediatría, Hospital Clínico Universitario Virgen de la Arrixaca, IMIB-Arrixaca, CIBERER, Murcia, Spain
| | - María José Sanchez-Soler
- Sección Genética Médica, Servicio de Pediatría, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - Catarina Macedo
- Serviço de Genética, Departamento de Pediatria, Hospital de Santa Maria, Centro Hospitalar e Universitário Lisboa Norte, Centro Académico de Medicina de Lisboa, Lisboa, Portugal
| | - Ariane Schmetz
- Institute of Human Genetics, Medical Faculty, University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Carmen Steinborn
- MVZ Mitteldeutscher Praxisverbund Humangenetik, Dresden, Germany
| | | | - Hellen Lesmann
- Institut für Humangenetik, Universitätsklinikum Bonn, Universität Bonn, Bonn, Germany
| | - Felix Marbach
- Institut für Humangenetik, Universitätsklinikum Heidelberg, Universität Heidelberg, Heidelberg, Germany
| | - Pilar Caro
- Institut für Humangenetik, Universitätsklinikum Heidelberg, Universität Heidelberg, Heidelberg, Germany
| | - Christian P. Schaaf
- Institut für Humangenetik, Universitätsklinikum Heidelberg, Universität Heidelberg, Heidelberg, Germany
| | - Peter Krawitz
- Institut für Genomische Statistik und Bioinformatik, Universitätsklinikum Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
| | - Dagmar Wieczorek
- Institute of Human Genetics, Medical Faculty, University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany,Center for Rare Diseases, Medical Faculty, University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Frank J Kaiser
- Institut für Humangenetik, Universitätsmedizin Essen, Universität Duisburg-Essen, Essen, Germany,Essener Zentrum für Seltene Erkrankungen (EZSE), Universitätsmedizin Essen, Essen, Germany
| | - Alma Kuechler
- Institut für Humangenetik, Universitätsmedizin Essen, Universität Duisburg-Essen, Essen, Germany,Essener Zentrum für Seltene Erkrankungen (EZSE), Universitätsmedizin Essen, Essen, Germany,*Correspondence: Antje Kampmeier, ; Alma Kuechler,
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7
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CUL4B-associated epilepsy: Report of a novel truncating variant promoting drug-resistant seizures and systematic review of the literature. Seizure 2023; 104:32-37. [PMID: 36476360 DOI: 10.1016/j.seizure.2022.11.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/23/2022] [Accepted: 11/28/2022] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Cabezas syndrome is a rare X-linked disease caused by mutations in CUL4B and characterized by developmental delay/intellectual disability, somatic dysmorphisms, behavioural disorder, ataxia/tremors. Although seizures have been formerly reported, their clinical semiology, EEG features and long-term outcome are largely unknown. PURPOSE This study aims to expand knowledge on epilepsy associated with Cabezas syndrome and to understand whether different types of variants in the CUL4B gene or brain MRI abnormalities may influence seizure onset and epilepsy course. METHODS With this in mind, we characterised the epileptic phenotype of a 17-year-old adolescent harbouring a CUL4B novel variant and performed a systematic literature review of CUL4B-associated seizures, analysing mutation types and neuroimaging features as epilepsy predictors. RESULTS Our case observation indicates that CUL4B-associated epilepsy may also be drug-resistant and persist beyond infancy. Literature analysis shows that 43% of CUL4B patients develop seizures, with no statistically significant differences in epilepsy development according to mutation type and neuroimaging features. CONCLUSION Our study extends knowledge of CUL4B-associated epilepsy, offering new insights into disease progression.
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8
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Clothier JL, Grooms AN, Porter-Gill PA, Gill PS, Schaefer GB. Identification of DCAF1 by Clinical Exome Sequencing and Methylation Analysis as a Candidate Gene for Autism and Intellectual Disability: A Case Report. J Pers Med 2022; 12:jpm12060886. [PMID: 35743672 PMCID: PMC9224943 DOI: 10.3390/jpm12060886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/14/2022] [Accepted: 05/25/2022] [Indexed: 11/16/2022] Open
Abstract
Autism spectrum disorder (ASD) comprises a heterogeneous group of neurodevelopmental disorders and occurs in all racial, ethnic, and socioeconomic groups. Cutting-edge technologies are contributing to understanding genetic underpinnings in ASD. The reported patient is a 32-year-old male and as an infant was noted to have microcephaly, hypospadias, pulmonary vascular anomaly, and small stature. He was diagnosed with Cornelia De Lange Syndrome (CDLS) at that time based on the clinical features. As a child, he had autistic features and intellectual disabilities and as diagnoses with autism and intellectual disability. He was referred as an adult to our neurodiversity clinic and a full exome trio sequencing with reflex to mitochondrial genes identified a de novo variant of uncertain significance in a candidate gene, DCAF1. The specific variant was c.137 C > T (p.Thr46Ile) in exon 4 in the DCAF1 gene. In silico analysis supports a deleterious effect on protein structure/function. DCAF1 participates with DDB1 and CUL4 as a part of the E3 ubiquitin ligase complex. The E3 ligase complex has been associated with a syndromic form of X-linked intellectual disability. The DDB1/CUL4 E3 ubiquitination complex plays a role in methylation-dependent ubiquitination. Next, a methylation study identified a signature similar to the methylation pattern found in X- linked intellectual disability type 93. This is associated with variants of the BRWD3 gene, which is linked with the functioning of the DDB1/CUL4 E3 ubiquitination complex. Taken together, this suggests that the de novo DCAF1 variant may be a newly identified molecular cause of autism and intellectual disability.
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Affiliation(s)
- Jeffery L. Clothier
- Psychiatric Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA;
- Correspondence: ; Tel.: +001-501-526-8100
| | - Amy N. Grooms
- Psychiatric Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA;
| | | | - Pritmohinder S. Gill
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA;
| | - G. Bradley Schaefer
- Genetics and Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA;
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9
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Lambert N, Moïse M, Nguyen L. E3 Ubiquitin ligases and cerebral cortex development in health and disease. Dev Neurobiol 2022; 82:392-407. [PMID: 35476229 DOI: 10.1002/dneu.22877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/24/2022] [Accepted: 03/30/2022] [Indexed: 11/08/2022]
Abstract
Cerebral cortex development involves the sequential progression of biological steps driven by molecular pathways whose tight regulation often relies on ubiquitination. Ubiquitination is a post-translational modification involved in all aspects of cellular homeostasis through the attachment of a ubiquitin moiety on proteins. Over the past years, an increasing amount of research has highlighted the crucial role played by ubiquitin ligases in every step of cortical development and whose impairment often leads to various neurodevelopmental disorders. In this review, we focus on the key contributions of E3 ubiquitin ligases for the progression of the different steps of corticogenesis, as well as the pathological consequences of their mutations, often resulting in malformations of cortical development. Finally, we discuss some promising targeted treatment strategies for these diseases based on recent advances in the field. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Nicolas Lambert
- Laboratory of molecular regulation of neurogenesis, GIGA-Stem Cells and GIGA-Neurosciences, Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège, CHU Sart Tilman, Liège, 4000, Belgium.,Department of Neurology, University Hospital of Liège, Liège, Belgium
| | - Martin Moïse
- Laboratory of molecular regulation of neurogenesis, GIGA-Stem Cells and GIGA-Neurosciences, Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège, CHU Sart Tilman, Liège, 4000, Belgium.,Department of Radiology, University Hospital of Liège, Liège, Belgium
| | - Laurent Nguyen
- Laboratory of molecular regulation of neurogenesis, GIGA-Stem Cells and GIGA-Neurosciences, Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège, CHU Sart Tilman, Liège, 4000, Belgium
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10
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Gu Z, You Z, Yang Y, Ding R, Wang M, Pu J, Chen J. Inhibition of MicroRNA miR-101-3p on prostate cancer progression by regulating Cullin 4B (CUL4B) and PI3K/AKT/mTOR signaling pathways. Bioengineered 2021; 12:4719-4735. [PMID: 34338146 PMCID: PMC8806765 DOI: 10.1080/21655979.2021.1949513] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
To probe into the efffects of miR-101-3p via regulating CUL4B within PI3K/AKT/mTOR signaling pathway on progression of prostate cancer (PCA). Western blot and qRT-PCR were adopted to detect CUL4B and miR-101-3p expressions in 75 cases with PCA . The cellular strains of PCA (LNCaP and PC3) were chose as the objects to check the targeting correlation between CUL4B and miR-101-3p through dual-luciferase reporter experiments. LNCaP cells and PC3 cells were randomly divided into the blank group, miR-101-3p mimic group, siRNA negative control (NC) group, CUL4B siRNA group and CUL4B siRNA plus the miR-101-3p inhibitor group. Cellular bioactivity measurement was done via Cell-Light EDU, MTT, Annexin-V-FITC/PI, scratch-heal experiments and invasion tests of Transwell. MiR-101-3p expression was decreased more signally in tumor tissues than in normal tissues adjacent to the cancer. MiR-101-3p inhibited cellular proliferating, migrating and invasion. Nevertheless, it promoted cellular apoptosis, up-regulated apoptotic proteins as well as down-regulated anti-apoptotic proteins. CUL4B siRNA and miR-101-3p simulation were similar in terms of their outcomes. Nonetheless, these results could be reversed through the miR-101-3p inhibitor. Besides, CUL4B siRNA and the simulation halted a serious of PI3K signal in PCA cells. MiR-101-3p expression was down-regulated in PCA patients. CUL4B was upregulated in PCA patients. Moreover, miR-101-3p suppressed cellular invasion, migration, proliferation and led to cellular apoptosis, which might be related to the PI3K/AKT/mTOR signaling pathway suppression. Finally, we found, MiR-101-3P suppressed PCA progression via aiming for CUL4B, which may offer the new molecular target for PCA clinical treatment.
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Affiliation(s)
- Zhenhua Gu
- Department of Urology, Wuxi Traditional Chinese Medicine Hospital, Wuxi, China
| | - Zhixin You
- Department of Urology, Kunshan Second People's Hospital, Kunshan City, China
| | - Yucheng Yang
- Department of Urology, Wuxi Traditional Chinese Medicine Hospital, Wuxi, China
| | - Rui Ding
- Department of Urology, Wuxi Traditional Chinese Medicine Hospital, Wuxi, China
| | - Meili Wang
- Department of Urology, Wuxi Traditional Chinese Medicine Hospital, Wuxi, China
| | - Jianming Pu
- Department of Urology, Changshu Hospital Affiliated to Nanjing University of Chinese Medicine, Changshu, China
| | - Jian Chen
- Department of Urology, Wuxi Traditional Chinese Medicine Hospital, Wuxi, China
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11
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White SM, Bhoj E, Nellåker C, Lachmeijer AM, Marshall AE, Boycott KM, Li D, Smith W, Hartley T, McBride A, Ernst ME, May AS, Wieczorek D, Abou Jamra R, Koch-Hogrebe M, Õunap K, Pajusalu S, van Gassen K, Sadedin S, Ellingwood S, Tan TY, Christodoulou J, Barea J, Lockhart PJ, Nezarati MM, Kernohan KD, Kernohan KD. A DNA repair disorder caused by de novo monoallelic DDB1 variants is associated with a neurodevelopmental syndrome. Am J Hum Genet 2021; 108:749-756. [PMID: 33743206 DOI: 10.1016/j.ajhg.2021.03.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 03/02/2021] [Indexed: 12/27/2022] Open
Abstract
The DNA damage-binding protein 1 (DDB1) is part of the CUL4-DDB1 ubiquitin E3 ligase complex (CRL4), which is essential for DNA repair, chromatin remodeling, DNA replication, and signal transduction. Loss-of-function variants in genes encoding the complex components CUL4 and PHIP have been reported to cause syndromic intellectual disability with hypotonia and obesity, but no phenotype has been reported in association with DDB1 variants. Here, we report eight unrelated individuals, identified through Matchmaker Exchange, with de novo monoallelic variants in DDB1, including one recurrent variant in four individuals. The affected individuals have a consistent phenotype of hypotonia, mild to moderate intellectual disability, and similar facies, including horizontal or slightly bowed eyebrows, deep-set eyes, full cheeks, a short nose, and large, fleshy and forward-facing earlobes, demonstrated in the composite face generated from the cohort. Digital anomalies, including brachydactyly and syndactyly, were common. Three older individuals have obesity. We show that cells derived from affected individuals have altered DDB1 function resulting in abnormal DNA damage signatures and histone methylation following UV-induced DNA damage. Overall, our study adds to the growing family of neurodevelopmental phenotypes mediated by disruption of the CRL4 ubiquitin ligase pathway and begins to delineate the phenotypic and molecular effects of DDB1 misregulation.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Kristin D Kernohan
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON K1H 8L1, Canada; Newborn Screening Ontario, Ottawa, ON K1H 8L1, Canada
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12
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López M, Pérez‐Grijalba V, García‐Cobaleda I, Domínguez‐Garrido E. A 22.5 kb deletion in CUL4B causing Cabezas syndrome identified using CNV approach from WES data. Clin Case Rep 2020; 8:3184-3188. [PMID: 33363903 PMCID: PMC7752442 DOI: 10.1002/ccr3.3381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 05/13/2020] [Accepted: 08/17/2020] [Indexed: 01/04/2023] Open
Abstract
Detecting clinical grade CNV based on WES is being improved in the NGS era.
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Affiliation(s)
- Maria López
- Molecular Diagnostics LaboratoryFundación Rioja SaludLogroñoSpain
| | | | - Inmaculada García‐Cobaleda
- Unidad de Diagnóstico y Asesoramiento GenéticoHospital Universitario Nuestra Sra de CandelariaSanta Cruz de TenerifeSpain
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13
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Ritelli M, Palagano E, Cinquina V, Beccagutti F, Chiarelli N, Strina D, Hall IF, Villa A, Sobacchi C, Colombi M. Genome-first approach for the characterization of a complex phenotype with combined NBAS and CUL4B deficiency. Bone 2020; 140:115571. [PMID: 32768688 DOI: 10.1016/j.bone.2020.115571] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 07/14/2020] [Accepted: 07/31/2020] [Indexed: 11/24/2022]
Abstract
Biallelic variants in neuroblastoma-amplified sequence (NBAS) cause an extremely broad spectrum of phenotypes. Clinical features range from isolated recurrent episodes of liver failure to multisystemic syndrome including short stature, skeletal osteopenia and dysplasia, optic atrophy, and a variable immunological, cutaneous, muscular, and neurological abnormalities. Hemizygous variants in CUL4B cause syndromic X-linked intellectual disability characterized by limitations in intellectual functions, developmental delays in gait, cognitive, and speech functioning, and other features including short stature, dysmorphism, and cerebral malformations. In this study, we report on a 4.5-month-old preterm infant with a complex phenotype mainly characterized by placental-related severe intrauterine growth restriction, post-natal growth failure with spontaneous bone fractures, which led to a suspicion of osteogenesis imperfecta, and lethal bronchopulmonary dysplasia with pulmonary hypertension. Whole exome sequencing identified compound heterozygosity for a known frameshift and a novel missense variant in NBAS and hemizygosity for a known CUL4B nonsense mutation. In vitro functional studies on the novel NBAS missense substitution demonstrated altered Golgi-to-endoplasmic reticulum retrograde vesicular trafficking and reduced collagen secretion, likely explaining part of the patient's phenotype. We also provided a comprehensive overview of the phenotypic features of NBAS and CUL4B deficiency, thus updating the recently emerging NBAS genotype-phenotype correlations. Our findings highlight the power of a genome-first approach for an early diagnosis of complex phenotypes.
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Affiliation(s)
- Marco Ritelli
- Division of Biology and Genetics, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Eleonora Palagano
- Consiglio Nazionale delle Ricerche-Istituto di Ricerca Genetica e Biomedica (CNR-IRGB), Milan Unit, 20138 Milan, Italy; Humanitas Clinical and Research Center-Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), 20089 Rozzano, Italy
| | - Valeria Cinquina
- Division of Biology and Genetics, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Federica Beccagutti
- Fondazione Poliambulanza, Department of Neonatal Intensive Care, 25124 Brescia, Italy
| | - Nicola Chiarelli
- Division of Biology and Genetics, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Dario Strina
- Consiglio Nazionale delle Ricerche-Istituto di Ricerca Genetica e Biomedica (CNR-IRGB), Milan Unit, 20138 Milan, Italy; Humanitas Clinical and Research Center-Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), 20089 Rozzano, Italy
| | | | - Anna Villa
- Consiglio Nazionale delle Ricerche-Istituto di Ricerca Genetica e Biomedica (CNR-IRGB), Milan Unit, 20138 Milan, Italy; San Raffaele Telethon Institute for Gene Therapy SR-Tiget, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Cristina Sobacchi
- Consiglio Nazionale delle Ricerche-Istituto di Ricerca Genetica e Biomedica (CNR-IRGB), Milan Unit, 20138 Milan, Italy; Humanitas Clinical and Research Center-Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), 20089 Rozzano, Italy.
| | - Marina Colombi
- Division of Biology and Genetics, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy.
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14
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Waking up quiescent neural stem cells: Molecular mechanisms and implications in neurodevelopmental disorders. PLoS Genet 2020; 16:e1008653. [PMID: 32324743 PMCID: PMC7179833 DOI: 10.1371/journal.pgen.1008653] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Neural stem cells (NSCs) are crucial for development, regeneration, and repair of the nervous system. Most NSCs in mammalian adult brains are quiescent, but in response to extrinsic stimuli, they can exit from quiescence and become reactivated to give rise to new neurons. The delicate balance between NSC quiescence and activation is important for adult neurogenesis and NSC maintenance. However, how NSCs transit between quiescence and activation remains largely elusive. Here, we discuss our current understanding of the molecular mechanisms underlying the reactivation of quiescent NSCs. We review recent advances on signaling pathways originated from the NSC niche and their crosstalk in regulating NSC reactivation. We also highlight new intrinsic paradigms that control NSC reactivation in Drosophila and mammalian systems. We also discuss emerging evidence on modeling human neurodevelopmental disorders using NSCs.
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15
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Ma T, Chen H, Wang P, Yang N, Bao J. Downregulation of lncRNA ZEB1-AS1 Represses Cell Proliferation, Migration, and Invasion Through Mediating PI3K/AKT/mTOR Signaling by miR-342-3p/CUL4B Axis in Prostate Cancer. Cancer Biother Radiopharm 2020; 35:661-672. [PMID: 32275162 DOI: 10.1089/cbr.2019.3123] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Background: Prostate cancer (PCa) is the second most common cancer among men, threatening men's health and life. Long noncoding RNA Zinc-finger E-box binding homeobox 1 antisense gene 1 (ZEB1-AS1) and Cullin 4B (CUL4B) were reported to be connected with the tumorigenesis of PCa. However, it is unclear whether ZEB1-AS1 regulates the expression of CUL4B in PCa. Materials and Methods: The levels of ZEB1-AS1 and CUL4B in PCa tissues and cells were evaluated by quantitative real-time polymerase chain reaction. Protein levels of CUL4B, p21, CyclinD1, matrix metalloprotease 9 (MMP9), E-cadherin, phosphorylated-phosphatidylinositol 3 kinase (p-PI3K), PI3K phosphorylated protein kinase B (p-AKT), AKT, p-mTOR and mammalian target of rapamycin (mTOR) in PCa tissues or cells were assessed by Western blot analysis. The proliferation, migration, and invasion abilities of PCa cells were determined with 3-(4, 5-dimethylthiazol-2-YI)-2,5-diphenyltetrazolium bromide (MTT) or transwell assay. The interaction between ZEB1-AS1 or CUL4B and microRNA-342-3p (miR-342-3p) was predicted using starBase v2.0 database and confirmed by the dual-luciferase reporter assay. Results: ZEB1-AS1 and CUL4B were upregulated and miR-342-3p was downregulated in PCa tissues and cells. Both ZEB1-AS1 and CUL4B inhibition constrained proliferation, migration, and invasion of PCa cells. Moreover, the elevation of CUL4B reversed the effects of ZEB1-AS1 silencing on the proliferation, migration, and invasion of PCa cells. Importantly, ZEB1-AS1 modulated CUL4B expression by sponging miR-342-3p in PCa cells. Besides, ZEB1-AS1 mediated PI3K/AKT/mTOR signal pathway by miR-342-3p/CUL4B axis in PCa cells. Conclusion: ZEB1-AS1 modulated PCa progression through mediating PI3K/AKT/mTOR signaling by miR-342-3p/CUL4B axis, providing a possible strategy for the treatment of PCa.
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Affiliation(s)
- Teng Ma
- Department of Urology, Urological Institute, Gansu Key Laboratory of Urinary System, Lanzhou University Second Hospital, Lanzhou, China
| | - Hua Chen
- Department of Urology, Urological Institute, Gansu Key Laboratory of Urinary System, Lanzhou University Second Hospital, Lanzhou, China
| | - Peilong Wang
- Department of Urology, Urological Institute, Gansu Key Laboratory of Urinary System, Lanzhou University Second Hospital, Lanzhou, China
| | - Ningqiang Yang
- Department of Urology, Urological Institute, Gansu Key Laboratory of Urinary System, Lanzhou University Second Hospital, Lanzhou, China
| | - Junsheng Bao
- Department of Urology, Urological Institute, Gansu Key Laboratory of Urinary System, Lanzhou University Second Hospital, Lanzhou, China
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16
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Reichermeier KM, Straube R, Reitsma JM, Sweredoski MJ, Rose CM, Moradian A, den Besten W, Hinkle T, Verschueren E, Petzold G, Thomä NH, Wertz IE, Deshaies RJ, Kirkpatrick DS. PIKES Analysis Reveals Response to Degraders and Key Regulatory Mechanisms of the CRL4 Network. Mol Cell 2020; 77:1092-1106.e9. [PMID: 31973889 DOI: 10.1016/j.molcel.2019.12.013] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/18/2019] [Accepted: 12/13/2019] [Indexed: 12/11/2022]
Abstract
Co-opting Cullin4 RING ubiquitin ligases (CRL4s) to inducibly degrade pathogenic proteins is emerging as a promising therapeutic strategy. Despite intense efforts to rationally design degrader molecules that co-opt CRL4s, much about the organization and regulation of these ligases remains elusive. Here, we establish protein interaction kinetics and estimation of stoichiometries (PIKES) analysis, a systematic proteomic profiling platform that integrates cellular engineering, affinity purification, chemical stabilization, and quantitative mass spectrometry to investigate the dynamics of interchangeable multiprotein complexes. Using PIKES, we show that ligase assemblies of Cullin4 with individual substrate receptors differ in abundance by up to 200-fold and that Cand1/2 act as substrate receptor exchange factors. Furthermore, degrader molecules can induce the assembly of their cognate CRL4, and higher expression of the associated substrate receptor enhances degrader potency. Beyond the CRL4 network, we show how PIKES can reveal systems level biochemistry for cellular protein networks important to drug development.
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Affiliation(s)
- Kurt M Reichermeier
- Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA; Genentech, 1 DNA Way, South San Francisco, 94080 CA, USA.
| | - Ronny Straube
- Max Plank Institute for Dynamics of Complex Technical Systems, Sandtorstr. 1, 39106 Magdeburg, Germany; Bristol-Myers Squibb, 3551 Lawrenceville Princeton Rd, Lawrence Township, NJ 08648, USA
| | - Justin M Reitsma
- Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA; Abbvie, 1 N Waukegan Rd, North Chicago, IL 60064, USA
| | - Michael J Sweredoski
- Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA
| | | | - Annie Moradian
- Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA
| | - Willem den Besten
- Genentech, 1 DNA Way, South San Francisco, 94080 CA, USA; Amgen Research, Amgen, One Amgen Center Drive, 29MB, Thousand Oaks, CA 91320, USA
| | - Trent Hinkle
- Genentech, 1 DNA Way, South San Francisco, 94080 CA, USA
| | | | - Georg Petzold
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland
| | - Nicolas H Thomä
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland
| | - Ingrid E Wertz
- Genentech, 1 DNA Way, South San Francisco, 94080 CA, USA
| | - Raymond J Deshaies
- Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA; Amgen Research, Amgen, One Amgen Center Drive, 29MB, Thousand Oaks, CA 91320, USA
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17
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Abstract
Cullin-RING ligase 4 (CRL4), a member of the cullin-RING ligase family, orchestrates a variety of critical cellular processes and pathophysiological events. Recent results from mouse genetics, clinical analyses, and biochemical studies have revealed the impact of CRL4 in development and cancer etiology and elucidated its in-depth mechanism on catalysis of ubiquitination as a ubiquitin E3 ligase. Here, we summarize the versatile roles of the CRL4 E3 ligase complexes in tumorigenesis dependent on the evidence obtained from knockout and transgenic mouse models as well as biochemical and pathological studies.
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18
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Frints SGM, Ozanturk A, Rodríguez Criado G, Grasshoff U, de Hoon B, Field M, Manouvrier-Hanu S, E Hickey S, Kammoun M, Gripp KW, Bauer C, Schroeder C, Toutain A, Mihalic Mosher T, Kelly BJ, White P, Dufke A, Rentmeester E, Moon S, Koboldt DC, van Roozendaal KEP, Hu H, Haas SA, Ropers HH, Murray L, Haan E, Shaw M, Carroll R, Friend K, Liebelt J, Hobson L, De Rademaeker M, Geraedts J, Fryns JP, Vermeesch J, Raynaud M, Riess O, Gribnau J, Katsanis N, Devriendt K, Bauer P, Gecz J, Golzio C, Gontan C, Kalscheuer VM. Pathogenic variants in E3 ubiquitin ligase RLIM/RNF12 lead to a syndromic X-linked intellectual disability and behavior disorder. Mol Psychiatry 2019; 24:1748-1768. [PMID: 29728705 DOI: 10.1038/s41380-018-0065-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 02/28/2018] [Indexed: 12/25/2022]
Abstract
RLIM, also known as RNF12, is an X-linked E3 ubiquitin ligase acting as a negative regulator of LIM-domain containing transcription factors and participates in X-chromosome inactivation (XCI) in mice. We report the genetic and clinical findings of 84 individuals from nine unrelated families, eight of whom who have pathogenic variants in RLIM (RING finger LIM domain-interacting protein). A total of 40 affected males have X-linked intellectual disability (XLID) and variable behavioral anomalies with or without congenital malformations. In contrast, 44 heterozygous female carriers have normal cognition and behavior, but eight showed mild physical features. All RLIM variants identified are missense changes co-segregating with the phenotype and predicted to affect protein function. Eight of the nine altered amino acids are conserved and lie either within a domain essential for binding interacting proteins or in the C-terminal RING finger catalytic domain. In vitro experiments revealed that these amino acid changes in the RLIM RING finger impaired RLIM ubiquitin ligase activity. In vivo experiments in rlim mutant zebrafish showed that wild type RLIM rescued the zebrafish rlim phenotype, whereas the patient-specific missense RLIM variants failed to rescue the phenotype and thus represent likely severe loss-of-function mutations. In summary, we identified a spectrum of RLIM missense variants causing syndromic XLID and affecting the ubiquitin ligase activity of RLIM, suggesting that enzymatic activity of RLIM is required for normal development, cognition and behavior.
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Affiliation(s)
- Suzanna G M Frints
- Department of Clinical Genetics, Maastricht University Medical Center+, azM, Maastricht, 6202 AZ, The Netherlands. .,Department of Genetics and Cell Biology, School for Oncology and Developmental Biology, GROW, FHML, Maastricht University, Maastricht, 6200 MD, The Netherlands.
| | - Aysegul Ozanturk
- Center for Human Disease Modeling and Departments of Pediatrics and Psychiatry, Duke University, Durham, NC, 27710, USA
| | | | - Ute Grasshoff
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, 72076, Germany
| | - Bas de Hoon
- Department of Developmental Biology, Erasmus University Medical Center, Rotterdam, 3015 CN, Rotterdam, The Netherlands.,Department of Gynaecology and Obstetrics, Erasmus University Medical Center, Rotterdam, 3015 CN, The Netherlands
| | - Michael Field
- GOLD (Genetics of Learning and Disability) Service, Hunter Genetics, Waratah, NSW, 2298, Australia
| | - Sylvie Manouvrier-Hanu
- Clinique de Génétique médicale Guy Fontaine, Centre de référence maladies rares Anomalies du développement Hôpital Jeanne de Flandre, Lille, 59000, France.,EA 7364 RADEME Maladies Rares du Développement et du Métabolisme, Faculté de Médecine, Université de Lille, Lille, 59000, France
| | - Scott E Hickey
- Division of Molecular & Human Genetics, Nationwide Children's Hospital, Columbus, OH, 43205, USA.,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, 43205, USA
| | - Molka Kammoun
- Center for Human Genetics, University Hospitals Leuven, Leuven, 3000, Belgium
| | - Karen W Gripp
- Alfred I. duPont Hospital for Children Nemours, Wilmington, DE, 19803, USA
| | - Claudia Bauer
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, 72076, Germany
| | - Christopher Schroeder
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, 72076, Germany
| | - Annick Toutain
- Service de Génétique, Hôpital Bretonneau, CHU de Tours, Tours, 37044, France.,UMR 1253, iBrain, Université de Tours, Inserm, Tours, 37032, France
| | - Theresa Mihalic Mosher
- Division of Molecular & Human Genetics, Nationwide Children's Hospital, Columbus, OH, 43205, USA.,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, 43205, USA.,The Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, OH, 43205, USA
| | - Benjamin J Kelly
- The Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, OH, 43205, USA
| | - Peter White
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, 43205, USA.,The Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, OH, 43205, USA
| | - Andreas Dufke
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, 72076, Germany
| | - Eveline Rentmeester
- Department of Developmental Biology, Erasmus University Medical Center, Rotterdam, 3015 CN, Rotterdam, The Netherlands
| | - Sungjin Moon
- Center for Human Disease Modeling and Departments of Pediatrics and Psychiatry, Duke University, Durham, NC, 27710, USA
| | - Daniel C Koboldt
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, 43205, USA.,The Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, OH, 43205, USA
| | - Kees E P van Roozendaal
- Department of Clinical Genetics, Maastricht University Medical Center+, azM, Maastricht, 6202 AZ, The Netherlands.,Department of Genetics and Cell Biology, School for Oncology and Developmental Biology, GROW, FHML, Maastricht University, Maastricht, 6200 MD, The Netherlands
| | - Hao Hu
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Stefan A Haas
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Hans-Hilger Ropers
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Lucinda Murray
- GOLD (Genetics of Learning and Disability) Service, Hunter Genetics, Waratah, NSW, 2298, Australia
| | - Eric Haan
- Adelaide Medical School and Robinson Research Institute, The University of Adelaide, Adelaide, SA, 5000, Australia.,South Australian Clinical Genetics Service, SA Pathology (at Women's and Children's Hospital), North Adelaide, SA, 5006, Australia
| | - Marie Shaw
- Adelaide Medical School and Robinson Research Institute, The University of Adelaide, Adelaide, SA, 5000, Australia
| | - Renee Carroll
- Adelaide Medical School and Robinson Research Institute, The University of Adelaide, Adelaide, SA, 5000, Australia
| | - Kathryn Friend
- Genetics and Molecular Pathology, SA Pathology, Adelaide, SA, 5006, Australia
| | - Jan Liebelt
- South Australian Clinical Genetics Service, SA Pathology (at Women's and Children's Hospital), North Adelaide, SA, 5006, Australia
| | - Lynne Hobson
- Genetics and Molecular Pathology, SA Pathology, Adelaide, SA, 5006, Australia
| | - Marjan De Rademaeker
- Centre for Medical Genetics, Reproduction and Genetics, Reproduction Genetics and Regenerative Medicine, Vrije Universiteit Brussel (VUB), UZ Brussel, 1090, Brussels, Belgium
| | - Joep Geraedts
- Department of Clinical Genetics, Maastricht University Medical Center+, azM, Maastricht, 6202 AZ, The Netherlands.,Department of Genetics and Cell Biology, School for Oncology and Developmental Biology, GROW, FHML, Maastricht University, Maastricht, 6200 MD, The Netherlands
| | - Jean-Pierre Fryns
- Center for Human Genetics, University Hospitals Leuven, Leuven, 3000, Belgium
| | - Joris Vermeesch
- Center for Human Genetics, University Hospitals Leuven, Leuven, 3000, Belgium
| | - Martine Raynaud
- Service de Génétique, Hôpital Bretonneau, CHU de Tours, Tours, 37044, France.,UMR 1253, iBrain, Université de Tours, Inserm, Tours, 37032, France
| | - Olaf Riess
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, 72076, Germany
| | - Joost Gribnau
- Department of Developmental Biology, Erasmus University Medical Center, Rotterdam, 3015 CN, Rotterdam, The Netherlands
| | - Nicholas Katsanis
- Center for Human Disease Modeling and Departments of Pediatrics and Psychiatry, Duke University, Durham, NC, 27710, USA
| | - Koen Devriendt
- Center for Human Genetics, University Hospitals Leuven, Leuven, 3000, Belgium
| | - Peter Bauer
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, 72076, Germany
| | - Jozef Gecz
- Adelaide Medical School and Robinson Research Institute, The University of Adelaide, Adelaide, SA, 5000, Australia.,South Australian Health and Medical Research Institute, Adelaide, SA, 5000, Australia
| | - Christelle Golzio
- Center for Human Disease Modeling and Departments of Pediatrics and Psychiatry, Duke University, Durham, NC, 27710, USA.,Institut de Génétique et de Biologie Moléculaire et Cellulaire, Department of Translational Medicine and Neurogenetics; Centre National de la Recherche Scientifique, UMR7104; Institut National de la Santé et de la Recherche Médicale, U964, Université de Strasbourg, 67400, Illkirch, France
| | - Cristina Gontan
- Department of Developmental Biology, Erasmus University Medical Center, Rotterdam, 3015 CN, Rotterdam, The Netherlands
| | - Vera M Kalscheuer
- Research Group Development and Disease, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany.
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19
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A novel CUL4B splice site variant in a young male exhibiting less pronounced features. Hum Genome Var 2019; 6:43. [PMID: 31645981 PMCID: PMC6804535 DOI: 10.1038/s41439-019-0074-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/24/2019] [Accepted: 07/27/2019] [Indexed: 11/20/2022] Open
Abstract
Patients with variants in CUL4B exhibit syndromic intellectual disability (MIM #300354). A seven-year-old boy presented with intellectual disability, a history of seizure, characteristic facial features, and short stature. Whole-exome sequencing detected a c.974+3A>G variant in CUL4B, which was subsequently confirmed to disrupt mRNA splicing. The current patient showed less pronounced phenotypic features compared with the previously reported cases. This report, therefore, provides evidence of genotype–phenotype correlations in CUL4B-related disorders.
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20
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Lopes F, Torres F, Soares G, Barbosa M, Silva J, Duque F, Rocha M, Sá J, Oliveira G, Sá MJ, Temudo T, Sousa S, Marques C, Lopes S, Gomes C, Barros G, Jorge A, Rocha F, Martins C, Mesquita S, Loureiro S, Cardoso EM, Cálix MJ, Dias A, Martins C, Mota CR, Antunes D, Dupont J, Figueiredo S, Figueiroa S, Gama-de-Sousa S, Cruz S, Sampaio A, Eijk P, Weiss MM, Ylstra B, Rendeiro P, Tavares P, Reis-Lima M, Pinto-Basto J, Fortuna AM, Maciel P. Genomic imbalances defining novel intellectual disability associated loci. Orphanet J Rare Dis 2019; 14:164. [PMID: 31277718 PMCID: PMC6612161 DOI: 10.1186/s13023-019-1135-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 06/12/2019] [Indexed: 11/29/2022] Open
Abstract
Background High resolution genome-wide copy number analysis, routinely used in clinical diagnosis for several years, retrieves new and extremely rare copy number variations (CNVs) that provide novel candidate genes contributing to disease etiology. The aim of this work was to identify novel genetic causes of neurodevelopmental disease, inferred from CNVs detected by array comparative hybridization (aCGH), in a cohort of 325 Portuguese patients with intellectual disability (ID). Results We have detected CNVs in 30.1% of the patients, of which 5.2% corresponded to novel likely pathogenic CNVs. For these 11 rare CNVs (which encompass novel ID candidate genes), we identified those most likely to be relevant, and established genotype-phenotype correlations based on detailed clinical assessment. In the case of duplications, we performed expression analysis to assess the impact of the rearrangement. Interestingly, these novel candidate genes belong to known ID-related pathways. Within the 8% of patients with CNVs in known pathogenic loci, the majority had a clinical presentation fitting the phenotype(s) described in the literature, with a few interesting exceptions that are discussed. Conclusions Identification of such rare CNVs (some of which reported for the first time in ID patients/families) contributes to our understanding of the etiology of ID and for the ever-improving diagnosis of this group of patients. Electronic supplementary material The online version of this article (10.1186/s13023-019-1135-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Fátima Lopes
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Fátima Torres
- CGC Genetics, Porto, Portugal.,Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Gabriela Soares
- Center for Medical Genetics Dr. Jacinto Magalhães, Porto Hospital Center, Praça Pedro Nunes, Porto, Portugal
| | - Mafalda Barbosa
- Center for Medical Genetics Dr. Jacinto Magalhães, Porto Hospital Center, Praça Pedro Nunes, Porto, Portugal.,Unit for Multidisciplinary Research in Biomedicine, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal.,The Mindich Child Health & Development Institute and the Department of Genetics & Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,The Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - João Silva
- Center for Medical Genetics Dr. Jacinto Magalhães, Porto Hospital Center, Praça Pedro Nunes, Porto, Portugal.,Centro de Genética Preditiva e Preventiva - CGPP, Instituto de Biologia Molecular e Celular - IBMC, Universidade do Porto, Porto, Portugal.,Instituto de Investigação e Inovação em Saúde - i3S, Universidade do Porto, Porto, Portugal
| | - Frederico Duque
- Unidade de Neurodesenvolvimento e Autismo do Serviço do Centro de Desenvolvimento da Criança and Centro de Investigação e Formação Clínica, Pediatric Hospital, Centro Hospitalar e Universitário de Coimbra, 3041-80, Coimbra, Portugal.,University Clinic of Pediatrics and Institute for Biomedical Imaging and Life Science, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Miguel Rocha
- Center for Medical Genetics Dr. Jacinto Magalhães, Porto Hospital Center, Praça Pedro Nunes, Porto, Portugal.,Medical Genetics Unit, Hospital de Braga, Braga, Portugal
| | - Joaquim Sá
- CGC Genetics, Porto, Portugal.,Department of Medical Genetics, Hospital de Faro, Faro, Portugal
| | - Guiomar Oliveira
- Unidade de Neurodesenvolvimento e Autismo do Serviço do Centro de Desenvolvimento da Criança and Centro de Investigação e Formação Clínica, Pediatric Hospital, Centro Hospitalar e Universitário de Coimbra, 3041-80, Coimbra, Portugal.,University Clinic of Pediatrics and Institute for Biomedical Imaging and Life Science, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Maria João Sá
- Center for Medical Genetics Dr. Jacinto Magalhães, Porto Hospital Center, Praça Pedro Nunes, Porto, Portugal.,Unit for Multidisciplinary Research in Biomedicine, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Teresa Temudo
- Pediatric Neurology Department, Centro Materno-Infantil Centro Hospitalar do Porto, Porto, Portugal
| | - Susana Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.,Centro de Genética Preditiva e Preventiva - CGPP, Instituto de Biologia Molecular e Celular - IBMC, Universidade do Porto, Porto, Portugal.,Instituto de Investigação e Inovação em Saúde - i3S, Universidade do Porto, Porto, Portugal
| | - Carla Marques
- Unidade de Neurodesenvolvimento e Autismo do Serviço do Centro de Desenvolvimento da Criança and Centro de Investigação e Formação Clínica, Pediatric Hospital, Centro Hospitalar e Universitário de Coimbra, 3041-80, Coimbra, Portugal
| | - Sofia Lopes
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Catarina Gomes
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Gisela Barros
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Arminda Jorge
- Development Unit, Pediatrics Service, Hospital Centre of Cova da Beira, Covilhã, Portugal.,CICS - Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Felisbela Rocha
- Department of Pediatrics, Médio Ave Hospital Center, Vila Nova de Famalicão, Portugal
| | - Cecília Martins
- Department of Pediatrics, Médio Ave Hospital Center, Vila Nova de Famalicão, Portugal
| | - Sandra Mesquita
- Development Unit, Pediatrics Service, Hospital Centre of Cova da Beira, Covilhã, Portugal
| | - Susana Loureiro
- Department of Pediatrics, Hospital S. Teotónio, Tondela/Viseu Hospital Center, Viseu, Portugal
| | - Elisa Maria Cardoso
- Department of Pediatrics, Hospital S. Teotónio, Tondela/Viseu Hospital Center, Viseu, Portugal
| | - Maria José Cálix
- Department of Pediatrics, Hospital S. Teotónio, Tondela/Viseu Hospital Center, Viseu, Portugal
| | - Andreia Dias
- Department of Pediatrics, Hospital S. Teotónio, Tondela/Viseu Hospital Center, Viseu, Portugal
| | - Cristina Martins
- Neuropaediatric Unit - Garcia de Orta Hospital, Almada, Portugal
| | - Céu R Mota
- Pediatric and Neonatal Intensive Care, Department of Pediatrics, Porto Hospital Center, Porto, Portugal
| | - Diana Antunes
- Department of Genetics, Hospital D. Estefânia, Lisboa-Norte Hospital Center, Lisbon, Portugal
| | - Juliette Dupont
- Genetics Service, Paediatric Department, University Hospital Santa Maria, Lisbon, Portugal
| | - Sara Figueiredo
- Department of Pediatrics, Médio Ave Hospital Center, Santo Tirso, Portugal
| | - Sónia Figueiroa
- Division of Pediatric Neurology, Department of Child and Adolescent, Centro Hospitalar do Porto e Hospital de Santo António, Porto, Portugal
| | - Susana Gama-de-Sousa
- Department of Pediatrics, Médio Ave Hospital Center, Vila Nova de Famalicão, Portugal
| | - Sara Cruz
- Neuropsychophysiology Lab, CIPsi, School of Psychology, University of Minho, Braga, Portugal
| | - Adriana Sampaio
- Neuropsychophysiology Lab, CIPsi, School of Psychology, University of Minho, Braga, Portugal
| | - Paul Eijk
- Department of Pathology, VU University Medical Center, Amsterdam, 1007, MB, The Netherlands
| | - Marjan M Weiss
- Department of Clinical Genetics, VU University Medical Center, Amsterdam, 1007, MB, The Netherlands
| | - Bauke Ylstra
- Department of Pathology, VU University Medical Center, Amsterdam, 1007, MB, The Netherlands
| | | | | | - Margarida Reis-Lima
- Center for Medical Genetics Dr. Jacinto Magalhães, Porto Hospital Center, Praça Pedro Nunes, Porto, Portugal.,GDPN- SYNLAB, Porto, Portugal
| | | | - Ana Maria Fortuna
- Center for Medical Genetics Dr. Jacinto Magalhães, Porto Hospital Center, Praça Pedro Nunes, Porto, Portugal
| | - Patrícia Maciel
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057, Braga, Portugal. .,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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21
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Ly PT, Tan YS, Koe CT, Zhang Y, Xie G, Endow S, Deng WM, Yu F, Wang H. CRL4Mahj E3 ubiquitin ligase promotes neural stem cell reactivation. PLoS Biol 2019; 17:e3000276. [PMID: 31170139 PMCID: PMC6553684 DOI: 10.1371/journal.pbio.3000276] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 05/02/2019] [Indexed: 12/22/2022] Open
Abstract
The ability of neural stem cells (NSCs) to transit between quiescence and proliferation is crucial for brain development and homeostasis. Drosophila Hippo pathway maintains NSC quiescence, but its regulation during brain development remains unknown. Here, we show that CRL4Mahj, an evolutionarily conserved E3 ubiquitin ligase, is essential for NSC reactivation (exit from quiescence). We demonstrate that damaged DNA-binding protein 1 (DDB1) and Cullin4, two core components of Cullin4-RING ligase (CRL4), are intrinsically required for NSC reactivation. We have identified a substrate receptor of CRL4, Mahjong (Mahj), which is necessary and sufficient for NSC reactivation. Moreover, we show that CRL4Mahj forms a protein complex with Warts (Wts/large tumor suppressor [Lats]), a kinase of the Hippo signaling pathway, and Mahj promotes the ubiquitination of Wts. Our genetic analyses further support the conclusion that CRL4Mahj triggers NSC reactivation by inhibition of Wts. Given that Cullin4B mutations cause mental retardation and cerebral malformation, similar regulatory mechanisms may be applied to the human brain. During the transition from quiescence to reactivation of neural stem cells, the E3 ubiquitin ligase CRL4Mahj promotes their reactivation by inhibiting Wts, a core kinase of Hippo signalling pathway.
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Affiliation(s)
- Phuong Thao Ly
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Ye Sing Tan
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
| | | | - Yingjie Zhang
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Gengqiang Xie
- Department of Biological Science, Florida State University, Tallahassee, Florida, United States of America
| | - Sharyn Endow
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
- Department of Cell Biology, Duke University Medical Centre, Durham, North Carolina, United States of America
| | - Wu-Min Deng
- Department of Biological Science, Florida State University, Tallahassee, Florida, United States of America
| | - Fengwei Yu
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
- Temasek Life Sciences Laboratory, Singapore, Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
| | - Hongyan Wang
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- * E-mail:
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22
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Cul4a promotes zebrafish primitive erythropoiesis via upregulating scl and gata1 expression. Cell Death Dis 2019; 10:388. [PMID: 31101894 PMCID: PMC6525236 DOI: 10.1038/s41419-019-1629-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 04/30/2019] [Accepted: 05/06/2019] [Indexed: 12/27/2022]
Abstract
CUL4A and CUL4B are closely related members in Cullin family and can each assemble a Cullin-RING E3 ligase complex (Cullin-RING Ligase 4A or 4B, CRL4A, or CRL4B) and participate in a variety of biological processes. Previously we showed that zebrafish cul4a, but not cul4b, is essential for cardiac and pectoral fin development. Here, we have identified cul4a as a crucial regulator of primitive erythropoiesis in zebrafish embryonic development. Depletion of cul4a resulted in a striking reduction of erythroid cells due to the inhibition of erythroid differentiation. Transcript levels for early hematopoietic regulatory genes including scl, lmo2, and gata1 are significantly reduced in cul4a-deficient embryos. Mechanistically, we demonstrated that scl and gata1, the central regulators of primitive hematopoiesis for erythroid determination, are transcriptionally upregulated by cul4a. These findings demonstrate an important role for cul4a in primitive erythropoiesis and may bear implications in regeneration medicine of anemia and related diseases.
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23
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Cheng J, Guo J, North BJ, Tao K, Zhou P, Wei W. The emerging role for Cullin 4 family of E3 ligases in tumorigenesis. Biochim Biophys Acta Rev Cancer 2018; 1871:138-159. [PMID: 30602127 DOI: 10.1016/j.bbcan.2018.11.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 11/28/2018] [Accepted: 11/29/2018] [Indexed: 02/06/2023]
Abstract
As a member of the Cullin-RING ligase family, Cullin-RING ligase 4 (CRL4) has drawn much attention due to its broad regulatory roles under physiological and pathological conditions, especially in neoplastic events. Based on evidence from knockout and transgenic mouse models, human clinical data, and biochemical interactions, we summarize the distinct roles of the CRL4 E3 ligase complexes in tumorigenesis, which appears to be tissue- and context-dependent. Notably, targeting CRL4 has recently emerged as a noval anti-cancer strategy, including thalidomide and its derivatives that bind to the substrate recognition receptor cereblon (CRBN), and anticancer sulfonamides that target DCAF15 to suppress the neoplastic proliferation of multiple myeloma and colorectal cancers, respectively. To this end, PROTACs have been developed as a group of engineered bi-functional chemical glues that induce the ubiquitination-mediated degradation of substrates via recruiting E3 ligases, such as CRL4 (CRBN) and CRL2 (pVHL). We summarize the recent major advances in the CRL4 research field towards understanding its involvement in tumorigenesis and further discuss its clinical implications. The anti-tumor effects using the PROTAC approach to target the degradation of undruggable targets are also highlighted.
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Affiliation(s)
- Ji Cheng
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Jianping Guo
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Brian J North
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Kaixiong Tao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Pengbo Zhou
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, 1300 York Ave., New York, NY 10065, USA.
| | - Wenyi Wei
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
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24
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Gregor A, Sadleir LG, Asadollahi R, Azzarello-Burri S, Battaglia A, Ousager LB, Boonsawat P, Bruel AL, Buchert R, Calpena E, Cogné B, Dallapiccola B, Distelmaier F, Elmslie F, Faivre L, Haack TB, Harrison V, Henderson A, Hunt D, Isidor B, Joset P, Kumada S, Lachmeijer AM, Lees M, Lynch SA, Martinez F, Matsumoto N, McDougall C, Mefford HC, Miyake N, Myers CT, Moutton S, Nesbitt A, Novelli A, Orellana C, Rauch A, Rosello M, Saida K, Santani AB, Sarkar A, Scheffer IE, Shinawi M, Steindl K, Symonds JD, Zackai EH, Reis A, Sticht H, Zweier C, Sticht H, Zweier C. De Novo Variants in the F-Box Protein FBXO11 in 20 Individuals with a Variable Neurodevelopmental Disorder. Am J Hum Genet 2018; 103:305-316. [PMID: 30057029 DOI: 10.1016/j.ajhg.2018.07.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 06/29/2018] [Indexed: 10/28/2022] Open
Abstract
Next-generation sequencing combined with international data sharing has enormously facilitated identification of new disease-associated genes and mutations. This is particularly true for genetically extremely heterogeneous entities such as neurodevelopmental disorders (NDDs). Through exome sequencing and world-wide collaborations, we identified and assembled 20 individuals with de novo variants in FBXO11. They present with mild to severe developmental delay associated with a range of features including short (4/20) or tall (2/20) stature, obesity (5/20), microcephaly (4/19) or macrocephaly (2/19), behavioral problems (17/20), seizures (5/20), cleft lip or palate or bifid uvula (3/20), and minor skeletal anomalies. FBXO11 encodes a member of the F-Box protein family, constituting a subunit of an E3-ubiquitin ligase complex. This complex is involved in ubiquitination and proteasomal degradation and thus in controlling critical biological processes by regulating protein turnover. The identified de novo aberrations comprise two large deletions, ten likely gene disrupting variants, and eight missense variants distributed throughout FBXO11. Structural modeling for missense variants located in the CASH or the Zinc-finger UBR domains suggests destabilization of the protein. This, in combination with the observed spectrum and localization of identified variants and the lack of apparent genotype-phenotype correlations, is compatible with loss of function or haploinsufficiency as an underlying mechanism. We implicate de novo missense and likely gene disrupting variants in FBXO11 in a neurodevelopmental disorder with variable intellectual disability and various other features.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Heinrich Sticht
- Institute of Biochemistry, Emil-Fischer Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Christiane Zweier
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany.
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25
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A genotype-first approach identifies an intellectual disability-overweight syndrome caused by PHIP haploinsufficiency. Eur J Hum Genet 2017; 26:54-63. [PMID: 29209020 DOI: 10.1038/s41431-017-0039-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 09/19/2017] [Accepted: 10/17/2017] [Indexed: 11/08/2022] Open
Abstract
Genotype-first combined with reverse phenotyping has shown to be a powerful tool in human genetics, especially in the era of next generation sequencing. This combines the identification of individuals with mutations in the same gene and linking these to consistent (endo)phenotypes to establish disease causality. We have performed a MIP (molecular inversion probe)-based targeted re-sequencing study in 3,275 individuals with intellectual disability (ID) to facilitate a genotype-first approach for 24 genes previously implicated in ID.Combining our data with data from a publicly available database, we confirmed 11 of these 24 genes to be relevant for ID. Amongst these, PHIP was shown to have an enrichment of disruptive mutations in the individuals with ID (5 out of 3,275). Through international collaboration, we identified a total of 23 individuals with PHIP mutations and elucidated the associated phenotype. Remarkably, all 23 individuals had developmental delay/ID and the majority were overweight or obese. Other features comprised behavioral problems (hyperactivity, aggression, features of autism and/or mood disorder) and dysmorphisms (full eyebrows and/or synophrys, upturned nose, large ears and tapering fingers). Interestingly, PHIP encodes two protein-isoforms, PHIP/DCAF14 and NDRP, each involved in neurodevelopmental processes, including E3 ubiquitination and neuronal differentiation. Detailed genotype-phenotype analysis points towards haploinsufficiency of PHIP/DCAF14, and not NDRP, as the underlying cause of the phenotype.Thus, we demonstrated the use of large scale re-sequencing by MIPs, followed by reverse phenotyping, as a constructive approach to verify candidate disease genes and identify novel syndromes, highlighted by PHIP haploinsufficiency causing an ID-overweight syndrome.
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26
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Prospective cohort study for identification of underlying genetic causes in neonatal encephalopathy using whole-exome sequencing. Genet Med 2017; 20:486-494. [PMID: 28817111 DOI: 10.1038/gim.2017.129] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 06/19/2017] [Indexed: 11/08/2022] Open
Abstract
PurposeNeonatal encephalopathy, which is characterized by a decreased level of consciousness, occurs in 1-7/1,000 live-term births. In more than half of term newborns, there is no identifiable etiological factor. To identify underlying genetic defects, we applied whole-exome sequencing (WES) in term newborns with neonatal encephalopathy as a prospective cohort study.MethodsTerm newborns with neonatal encephalopathy and no history of perinatal asphyxia were included. WES was performed using patient and both parents' DNA.ResultsNineteen patients fulfilling inclusion criteria were enrolled. Five patients were excluded owing to withdrawal of consent, no parental DNA samples, or a genetic diagnosis prior to WES. Fourteen patients underwent WES. We confirmed a genetic diagnosis in five patients (36%): epileptic encephalopathy associated with autosomal dominant de novo variants in SCN2A (p.Met1545Val), KCNQ2 (p.Asp212Tyr), and GNAO1 (p.Gly40Arg); lipoic acid synthetase deficiency due to compound heterozygous variants in LIAS (p.Ala253Pro and p.His236Gln); and encephalopathy associated with an X-linked variant in CUL4B (p.Asn211Ser).ConclusionWES is helpful at arriving genetic diagnoses in neonatal encephalopathy and/or seizures and brain damage. It will increase our understanding and probably enable us to develop targeted neuroprotective treatment strategies.
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27
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Weissbach S, Reinert MC, Altmüller J, Krätzner R, Thiele H, Rosenbaum T, Nürnberg P, Gärtner J. A new CUL4B variant associated with a mild phenotype and an exceptional pattern of leukoencephalopathy. Am J Med Genet A 2017; 173:2803-2807. [PMID: 28817236 DOI: 10.1002/ajmg.a.38390] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 06/29/2017] [Accepted: 07/14/2017] [Indexed: 11/07/2022]
Abstract
Cabezas type of X-linked syndromic intellectual disability (MRXSC; MIM300354) is a rare X-linked recessive intellectual disability characterized primarily by intellectual disability, short stature, hypogonadism, and gait abnormalities. It is caused by a wide spectrum of hemizygous variants in CUL4B. In a 10-year-old boy with an exceptional leukoencephalopathy pattern, we identified a new missense variant p.Leu329Gln in CUL4B using "Mendeliome" sequencing. However, his phenotype does not include the severe characteristics currently known for MRXSC. We discuss the divergent phenotype and propose a potential connection between the different CUL4B variants and corresponding phenotypes in the context of the current literature as well as 3D homology modeling.
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Affiliation(s)
- Susann Weissbach
- Division of Pediatric Neurology, Department of Pediatrics and Adolescent Medicine, University Medical Center Göttingen, Göttingen, Germany
| | - Marie-Christine Reinert
- Division of Pediatric Neurology, Department of Pediatrics and Adolescent Medicine, University Medical Center Göttingen, Göttingen, Germany
| | - Janine Altmüller
- Cologne Center for Genomics, Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Ralph Krätzner
- Division of Pediatric Neurology, Department of Pediatrics and Adolescent Medicine, University Medical Center Göttingen, Göttingen, Germany
| | - Holger Thiele
- Cologne Center for Genomics, Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Thorsten Rosenbaum
- Department of Pediatrics and Adolescent Medicine, Sana Hospitals Duisburg, Duisburg, Germany
| | - Peter Nürnberg
- Cologne Center for Genomics, Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Jutta Gärtner
- Division of Pediatric Neurology, Department of Pediatrics and Adolescent Medicine, University Medical Center Göttingen, Göttingen, Germany
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28
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Abstract
Cullin 4B (CUL4B) is a scaffold of the Cullin4B-Ring E3 ligase complex (CRL4B) that plays an important role in proteolysis and is implicated in tumorigenesis. Aberrant expression of CUL4B has been reported in various types of human diseases. Recently, studies have shown that CUL4B was overexpressed in a multitude of solid neoplasms and affect the expression of several tumor suppressor genes. In this review, we aim to summarize the biological function of CUL4B in order to better understand its pathogenesis in human cancers.
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Affiliation(s)
- Ying Li
- Department of Hematology, Shandong Provincial Hospital Affiliated to Shandong University, No.324, Jingwu Road, Jinan, 250021 Shandong People's Republic of China
| | - Xin Wang
- Department of Hematology, Shandong Provincial Hospital Affiliated to Shandong University, No.324, Jingwu Road, Jinan, 250021 Shandong People's Republic of China.,Shandong University School of Medicine, Jinan, 250012 Shandong People's Republic of China
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29
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Zhang H, Li S, Liu P, Lee FHF, Wong AHC, Liu F. Proteomic analysis of the cullin 4B interactome using proximity-dependent biotinylation in living cells. Proteomics 2017; 17. [PMID: 28225217 DOI: 10.1002/pmic.201600163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 01/27/2017] [Accepted: 02/17/2017] [Indexed: 01/08/2023]
Abstract
Cullin 4B (CUL4B) mutations have been implicated in mental retardation and dopamine-related behaviors due to disruptions in their interaction with cullin-RING E3 ligases (CRLs). Thus, further identification of CUL4B substrates can increase the knowledge of protein homeostasis and illuminate the role of CUL4B in neuropsychiatric disease. However, the transient nature of the coupling between CUL4B and its substrates is difficult to detect in vivo using current approaches, thus hampers efforts to investigate functions of CRLs within unperturbed living systems. In this study, we sought to discover CUL4B interactants with or without dopamine stimulation. BirA (118G) proximity-dependent biotin labeling combined with LC-MS was employed to biotinylate and identify transient and weak interactants of CUL4B. After purification with streptavidin beads and identified by LC-MS, a total of 150 biotinylated proteins were identified at baseline condition, 53 of which are well-known CUL4B interactants. After dopamine stimulation, 29 proteins disappeared and were replaced by 21 different protein interactants. The altered CUL4B interactants suggest that CUL4B regulates protein turnover and homeostasis in response to dopamine stimulation. Our results demonstrate the potential of this approach to identify novel CUL4B-related molecules in respond to cellular stimuli, which may be applied to other types of signaling pathways.
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Affiliation(s)
- Hailong Zhang
- Campbell Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Shupeng Li
- Campbell Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Pingting Liu
- Campbell Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Frankie H F Lee
- Campbell Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Albert H C Wong
- Campbell Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Fang Liu
- Campbell Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
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30
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Mi J, Zou Y, Lin X, Lu J, Liu X, Zhao H, Ye X, Hu H, Jiang B, Han B, Shao C, Gong Y. Dysregulation of the miR-194-CUL4B negative feedback loop drives tumorigenesis in non-small-cell lung carcinoma. Mol Oncol 2017; 11:305-319. [PMID: 28164432 PMCID: PMC5527444 DOI: 10.1002/1878-0261.12038] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 12/14/2016] [Accepted: 12/15/2016] [Indexed: 12/13/2022] Open
Abstract
Cullin 4B (CUL4B), a scaffold protein that assembles CRL4B ubiquitin ligase complexes, is overexpressed in many types of cancers and represses many tumor suppressors through epigenetic mechanisms. However, the mechanisms by which CUL4B is upregulated remain to be elucidated. Here, we show that CUL4B is upregulated in non‐small‐cell lung carcinoma (NSCLC) tissues and is critically required for cell proliferation and migration in vitro and for xenograft tumor formation in vivo. We found that microRNA‐194 (miR‐194) and CUL4B protein were inversely correlated in cancer specimens and demonstrated that miR‐194 could downregulate CUL4B by directly targeting its 3′‐UTR. We also showed that CUL4B could be negatively regulated by p53 in a miR‐194‐dependent manner. miR‐194 was further shown to attenuate the malignant phenotype of lung cancer cells by downregulating CUL4B. Interestingly, CRL4B also epigenetically represses miR‐194 by catalyzing monoubiquitination at H2AK119 and by coordinating with PRC2 to promote trimethylation at H3K27 at the gene clusters encoding miR‐194. RBX1, another component in CRL4B complex, is also targeted by miR‐194 in NSCLC cells. Our results thus establish a double‐negative feedback loop between miR‐194 and CRL4B, dysregulation of which contributes to tumorigenesis. The function of miR‐194 as a negative regulator of CUL4B has therapeutic implications in lung cancer.
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Affiliation(s)
- Jun Mi
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China.,Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Shandong University School of Stomatology, Jinan, China
| | - Yongxin Zou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Xiaohua Lin
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Juanjuan Lu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Xiaochen Liu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Hui Zhao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Xiang Ye
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Huili Hu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Baichun Jiang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Bo Han
- Department of Pathology, Shandong University School of Basic Medical Sciences, Jinan, China.,Department of Pathology, Shandong University Qilu Hospital, Jinan, China
| | - Changshun Shao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China.,Department of Genetics/Human Genetics Institute of New Jersey, Piscataway, NJ, USA
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
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31
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Genome-first approach diagnosed Cabezas syndrome via novel CUL4B mutation detection. Hum Genome Var 2017; 4:16045. [PMID: 28144446 PMCID: PMC5243919 DOI: 10.1038/hgv.2016.45] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/04/2016] [Accepted: 11/04/2016] [Indexed: 12/15/2022] Open
Abstract
Cabezas syndrome is a syndromic form of X-linked intellectual disability primarily characterized by a short stature, hypogonadism and abnormal gait, with other variable features resulting from mutations in the CUL4B gene. Here, we report a clinically undiagnosed 5-year-old male with severe intellectual disability. A genome-first approach using targeted exome sequencing identified a novel nonsense mutation [NM_003588.3:c.2698G>T, p.(Glu900*)] in the last coding exon of CUL4B, thus diagnosing this patient with Cabezas syndrome.
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32
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Abstract
The next-generation sequencing revolution has substantially increased our understanding of the mutated genes that underlie complex neurodevelopmental disease. Exome sequencing has enabled us to estimate the number of genes involved in the etiology of neurodevelopmental disease, whereas targeted sequencing approaches have provided the means for quick and cost-effective sequencing of thousands of patient samples to assess the significance of individual genes. By leveraging such technologies and clinical exome sequencing, a genotype-first approach has emerged in which patients with a common genotype are first identified and then clinically reassessed as a group. This approach has proven a powerful methodology for refining disease subtypes. We propose that the molecular characterization of these genetic subtypes has important implications for diagnostics and also for future drug development. Classifying patients into subgroups with a common genetic etiology and applying treatments tailored to the specific molecular defect they carry is likely to improve management of neurodevelopmental disease in the future.
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33
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Hu H, Haas SA, Chelly J, Van Esch H, Raynaud M, de Brouwer APM, Weinert S, Froyen G, Frints SGM, Laumonnier F, Zemojtel T, Love MI, Richard H, Emde AK, Bienek M, Jensen C, Hambrock M, Fischer U, Langnick C, Feldkamp M, Wissink-Lindhout W, Lebrun N, Castelnau L, Rucci J, Montjean R, Dorseuil O, Billuart P, Stuhlmann T, Shaw M, Corbett MA, Gardner A, Willis-Owen S, Tan C, Friend KL, Belet S, van Roozendaal KEP, Jimenez-Pocquet M, Moizard MP, Ronce N, Sun R, O'Keeffe S, Chenna R, van Bömmel A, Göke J, Hackett A, Field M, Christie L, Boyle J, Haan E, Nelson J, Turner G, Baynam G, Gillessen-Kaesbach G, Müller U, Steinberger D, Budny B, Badura-Stronka M, Latos-Bieleńska A, Ousager LB, Wieacker P, Rodríguez Criado G, Bondeson ML, Annerén G, Dufke A, Cohen M, Van Maldergem L, Vincent-Delorme C, Echenne B, Simon-Bouy B, Kleefstra T, Willemsen M, Fryns JP, Devriendt K, Ullmann R, Vingron M, Wrogemann K, Wienker TF, Tzschach A, van Bokhoven H, Gecz J, Jentsch TJ, Chen W, Ropers HH, Kalscheuer VM. X-exome sequencing of 405 unresolved families identifies seven novel intellectual disability genes. Mol Psychiatry 2016; 21:133-48. [PMID: 25644381 PMCID: PMC5414091 DOI: 10.1038/mp.2014.193] [Citation(s) in RCA: 208] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 11/17/2014] [Accepted: 12/08/2014] [Indexed: 12/27/2022]
Abstract
X-linked intellectual disability (XLID) is a clinically and genetically heterogeneous disorder. During the past two decades in excess of 100 X-chromosome ID genes have been identified. Yet, a large number of families mapping to the X-chromosome remained unresolved suggesting that more XLID genes or loci are yet to be identified. Here, we have investigated 405 unresolved families with XLID. We employed massively parallel sequencing of all X-chromosome exons in the index males. The majority of these males were previously tested negative for copy number variations and for mutations in a subset of known XLID genes by Sanger sequencing. In total, 745 X-chromosomal genes were screened. After stringent filtering, a total of 1297 non-recurrent exonic variants remained for prioritization. Co-segregation analysis of potential clinically relevant changes revealed that 80 families (20%) carried pathogenic variants in established XLID genes. In 19 families, we detected likely causative protein truncating and missense variants in 7 novel and validated XLID genes (CLCN4, CNKSR2, FRMPD4, KLHL15, LAS1L, RLIM and USP27X) and potentially deleterious variants in 2 novel candidate XLID genes (CDK16 and TAF1). We show that the CLCN4 and CNKSR2 variants impair protein functions as indicated by electrophysiological studies and altered differentiation of cultured primary neurons from Clcn4(-/-) mice or after mRNA knock-down. The newly identified and candidate XLID proteins belong to pathways and networks with established roles in cognitive function and intellectual disability in particular. We suggest that systematic sequencing of all X-chromosomal genes in a cohort of patients with genetic evidence for X-chromosome locus involvement may resolve up to 58% of Fragile X-negative cases.
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Affiliation(s)
- H Hu
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - S A Haas
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - J Chelly
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - H Van Esch
- Center for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - M Raynaud
- Inserm U930 ‘Imaging and Brain', Tours, France,University François-Rabelais, Tours, France,Centre Hospitalier Régional Universitaire, Service de Génétique, Tours, France
| | - A P M de Brouwer
- Department of Human Genetics, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - S Weinert
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany,Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany
| | - G Froyen
- Human Genome Laboratory, VIB Center for the Biology of Disease, Leuven, Belgium,Human Genome Laboratory, Department of Human Genetics, K.U. Leuven, Leuven, Belgium
| | - S G M Frints
- Department of Clinical Genetics, Maastricht University Medical Center, azM, Maastricht, The Netherlands,School for Oncology and Developmental Biology, GROW, Maastricht University, Maastricht, The Netherlands
| | - F Laumonnier
- Inserm U930 ‘Imaging and Brain', Tours, France,University François-Rabelais, Tours, France
| | - T Zemojtel
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - M I Love
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - H Richard
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - A-K Emde
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - M Bienek
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - C Jensen
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - M Hambrock
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - U Fischer
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - C Langnick
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany
| | - M Feldkamp
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany
| | - W Wissink-Lindhout
- Department of Human Genetics, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - N Lebrun
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - L Castelnau
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - J Rucci
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - R Montjean
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - O Dorseuil
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - P Billuart
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - T Stuhlmann
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany,Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany
| | - M Shaw
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - M A Corbett
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - A Gardner
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - S Willis-Owen
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,National Heart and Lung Institute, Imperial College London, London, UK
| | - C Tan
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia
| | - K L Friend
- SA Pathology, Women's and Children's Hospital, Adelaide, SA, Australia
| | - S Belet
- Human Genome Laboratory, VIB Center for the Biology of Disease, Leuven, Belgium,Human Genome Laboratory, Department of Human Genetics, K.U. Leuven, Leuven, Belgium
| | - K E P van Roozendaal
- Department of Clinical Genetics, Maastricht University Medical Center, azM, Maastricht, The Netherlands,School for Oncology and Developmental Biology, GROW, Maastricht University, Maastricht, The Netherlands
| | - M Jimenez-Pocquet
- Centre Hospitalier Régional Universitaire, Service de Génétique, Tours, France
| | - M-P Moizard
- Inserm U930 ‘Imaging and Brain', Tours, France,University François-Rabelais, Tours, France,Centre Hospitalier Régional Universitaire, Service de Génétique, Tours, France
| | - N Ronce
- Inserm U930 ‘Imaging and Brain', Tours, France,University François-Rabelais, Tours, France,Centre Hospitalier Régional Universitaire, Service de Génétique, Tours, France
| | - R Sun
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - S O'Keeffe
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - R Chenna
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - A van Bömmel
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - J Göke
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - A Hackett
- Genetics of Learning and Disability Service, Hunter Genetics, Waratah, NSW, Australia
| | - M Field
- Genetics of Learning and Disability Service, Hunter Genetics, Waratah, NSW, Australia
| | - L Christie
- Genetics of Learning and Disability Service, Hunter Genetics, Waratah, NSW, Australia
| | - J Boyle
- Genetics of Learning and Disability Service, Hunter Genetics, Waratah, NSW, Australia
| | - E Haan
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,SA Pathology, Women's and Children's Hospital, Adelaide, SA, Australia
| | - J Nelson
- Genetic Services of Western Australia, King Edward Memorial Hospital, Perth, WA, Australia
| | - G Turner
- Genetics of Learning and Disability Service, Hunter Genetics, Waratah, NSW, Australia
| | - G Baynam
- Genetic Services of Western Australia, King Edward Memorial Hospital, Perth, WA, Australia,School of Paediatrics and Child Health, University of Western Australia, Perth, WA, Australia,Institute for Immunology and Infectious Diseases, Murdoch University, Perth, WA, Australia,Telethon Kids Institute, Perth, WA, Australia
| | | | - U Müller
- Institut für Humangenetik, Justus-Liebig-Universität Giessen, Giessen, Germany,bio.logis Center for Human Genetics, Frankfurt a. M., Germany
| | - D Steinberger
- Institut für Humangenetik, Justus-Liebig-Universität Giessen, Giessen, Germany,bio.logis Center for Human Genetics, Frankfurt a. M., Germany
| | - B Budny
- Chair and Department of Endocrinology, Metabolism and Internal Diseases, Ponzan University of Medical Sciences, Poznan, Poland
| | - M Badura-Stronka
- Chair and Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
| | - A Latos-Bieleńska
- Chair and Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
| | - L B Ousager
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - P Wieacker
- Institut für Humangenetik, Universitätsklinikum Münster, Muenster, Germany
| | | | - M-L Bondeson
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - G Annerén
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - A Dufke
- Institut für Medizinische Genetik und Angewandte Genomik, Tübingen, Germany
| | - M Cohen
- Kinderzentrum München, München, Germany
| | - L Van Maldergem
- Centre de Génétique Humaine, Université de Franche-Comté, Besançon, France
| | - C Vincent-Delorme
- Service de Génétique, Hôpital Jeanne de Flandre CHRU de Lilles, Lille, France
| | - B Echenne
- Service de Neuro-Pédiatrie, CHU Montpellier, Montpellier, France
| | - B Simon-Bouy
- Laboratoire SESEP, Centre hospitalier de Versailles, Le Chesnay, France
| | - T Kleefstra
- Department of Human Genetics, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - M Willemsen
- Department of Human Genetics, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - J-P Fryns
- Center for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - K Devriendt
- Center for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - R Ullmann
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - M Vingron
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - K Wrogemann
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany,Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, MB, Canada
| | - T F Wienker
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - A Tzschach
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - H van Bokhoven
- Department of Human Genetics, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - J Gecz
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - T J Jentsch
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany,Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany
| | - W Chen
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany,Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany
| | - H-H Ropers
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - V M Kalscheuer
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany,Max Planck Institute for Molecular Genetics, Ihnestrasse 73, Berlin 14195, Germany. E-mail:
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Hannah J, Zhou P. Distinct and overlapping functions of the cullin E3 ligase scaffolding proteins CUL4A and CUL4B. Gene 2015; 573:33-45. [PMID: 26344709 DOI: 10.1016/j.gene.2015.08.064] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/03/2015] [Accepted: 08/27/2015] [Indexed: 01/29/2023]
Abstract
The cullin 4 subfamily of genes includes CUL4A and CUL4B, which share a mostly identical amino acid sequence aside from the elongated N-terminal region in CUL4B. Both act as scaffolding proteins for modular cullin RING ligase 4 (CRL4) complexes which promote the ubiquitination of a variety of substrates. CRL4 function is vital to cells as loss of both genes or their shared substrate adaptor protein DDB1 halts proliferation and eventually leads to cell death. Due to their high structural similarity, CUL4A and CUL4B share a substantial overlap in function. However, in some cases, differences in subcellular localization, spatiotemporal expression patterns and stress-inducibility preclude functional compensation. In this review, we highlight the most essential functions of the CUL4 genes in: DNA repair and replication, chromatin-remodeling, cell cycle regulation, embryogenesis, hematopoiesis and spermatogenesis. CUL4 genes are also clinically relevant as dysregulation can contribute to the onset of cancer and CRL4 complexes are often hijacked by certain viruses to promote viral replication and survival. Also, mutations in CUL4B have been implicated in a subset of patients suffering from syndromic X-linked intellectual disability (AKA mental retardation). Interestingly, the antitumor effects of immunomodulatory drugs are caused by their binding to the CRL4CRBN complex and re-directing the E3 ligase towards the Ikaros transcription factors IKZF1 and IKZF3. Because of their influence over key cellular functions and relevance to human disease, CRL4s are considered promising targets for therapeutic intervention.
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Affiliation(s)
- Jeffrey Hannah
- Department of Pathology, Weill Cornell Medical College, 1300 York Ave. NY, NY 10065, United States.
| | - Pengbo Zhou
- Department of Pathology, Weill Cornell Medical College, 1300 York Ave. NY, NY 10065, United States.
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35
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Zhao W, Jiang B, Hu H, Zhang S, Lv S, Yuan J, Qian Y, Zou Y, Li X, Jiang H, Liu F, Shao C, Gong Y. Lack of CUL4B leads to increased abundance of GFAP-positive cells that is mediated by PTGDS in mouse brain. Hum Mol Genet 2015; 24:4686-97. [PMID: 26025376 DOI: 10.1093/hmg/ddv200] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Accepted: 05/26/2015] [Indexed: 01/05/2023] Open
Abstract
Astrocytes are the most abundant cell type in the mammalian brain and are important for the functions of the central nervous system. Glial fibrillary acidic protein (GFAP) is regarded as a hallmark of mature astrocytes, though some GFPA-positive cells may act as neural stem cells. Missense heterozygous mutations in GFAP cause Alexander disease that manifests leukodystrophy and intellectual disability. Here, we show that CUL4B, a scaffold protein that assembles E3 ubiquitin ligase, represses the expression of GFAP in neural progenitor cells (NPCs) during brain development. Lack of Cul4b in NPCs in cultures led to increased generation of astrocytes, marked by GFAP and S100β. The GFAP+ cells were also found to be more abundant in the brains of nervous system-specific Cul4b knockout mice in vivo. Moreover, we demonstrated that the increased generation of GFAP+ cells from Cul4b-null NPCs was mediated by an upregulation of prostaglandin D2 synthase PTGDS. We showed that the increased GFAP expression can be attenuated by pharmacological inhibition of the PTGDS enzymatic activity or by shRNA-mediated knockdown of Ptgds. Importantly, exogenously added PTGDS could promote the generation of GFAP+ cells from wild-type NPCs. We further observed that Ptgds is targeted and repressed by the CUL4B/PRC2 complex. Together, our results demonstrate CUL4B as a negative regulator of GFAP expression during neural development.
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Affiliation(s)
- Wei Zhao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Baichun Jiang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Huili Hu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Shuqian Zhang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Shuaishuai Lv
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Jupeng Yuan
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Yanyan Qian
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Yongxin Zou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Xi Li
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Hong Jiang
- Institute of Medical Psychology, Shandong University School of Medicine, Jinan, Shandong 250012, China and
| | - Fang Liu
- Department of Neuroscience, Centre for Addiction and Mental Health, Toronto, Ontario, Canada M5T 1R8
| | - Changshun Shao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China,
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China,
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