1
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Ma R, Zhang Y, Li H, Kang HR, Kim Y, Han K. Cell-autonomous reduction of CYFIP2 is insufficient to induce Alzheimer's disease-like pathologies in the hippocampal CA1 pyramidal neurons of aged mice. Anim Cells Syst (Seoul) 2023; 27:93-101. [PMID: 36999135 PMCID: PMC10044167 DOI: 10.1080/19768354.2023.2192263] [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] [Indexed: 04/01/2023] Open
Abstract
Cytoplasmic FMR1-interacting protein 2 (CYFIP2) is an evolutionarily conserved multifunctional protein that regulates the neuronal actin cytoskeleton, mRNA translation and transport, and mitochondrial morphology and function. Supporting its critical roles in proper neuronal development and function, human genetic studies have repeatedly identified variants of the CYFIP2 gene in individuals diagnosed with neurodevelopmental disorders. Notably, a few recent studies have also suggested a mechanistic link between reduced CYFIP2 level and Alzheimer's disease (AD). Specifically, in the hippocampus of 12-month-old Cyfip2 heterozygous mice, several AD-like pathologies were identified, including increased levels of Tau phosphorylation and gliosis, and loss of dendritic spines in CA1 pyramidal neurons. However, detailed pathogenic mechanisms, such as cell types and their circuits where the pathologies originate, remain unknown for AD-like pathologies caused by CYFIP2 reduction. In this study, we aimed to address this issue by examining whether the cell-autonomous reduction of CYFIP2 in CA1 excitatory pyramidal neurons is sufficient to induce AD-like phenotypes in the hippocampus. We performed immunohistochemical, morphological, and biochemical analyses in 12-month-old Cyfip2 conditional knock-out mice, which have postnatally reduced CYFIP2 expression level in CA1, but not in CA3, excitatory pyramidal neurons of the hippocampus. Unexpectedly, we could not find any significant AD-like phenotype, suggesting that the CA1 excitatory neuron-specific reduction of CYFIP2 level is insufficient to lead to AD-like pathologies in the hippocampus. Therefore, we propose that CYFIP2 reduction in other neurons and/or their synaptic connections with CA1 pyramidal neurons may be critically involved in the hippocampal AD-like phenotypes of Cyfip2 heterozygous mice.
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Affiliation(s)
- Ruiying Ma
- Department of Neuroscience, Korea University College of Medicine, Seoul, Republic of Korea
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
| | - Yinhua Zhang
- Department of Neuroscience, Korea University College of Medicine, Seoul, Republic of Korea
| | - Huiling Li
- Department of Neuroscience, Korea University College of Medicine, Seoul, Republic of Korea
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
| | - Hyae Rim Kang
- Department of Neuroscience, Korea University College of Medicine, Seoul, Republic of Korea
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
| | - Yoonhee Kim
- Department of Neuroscience, Korea University College of Medicine, Seoul, Republic of Korea
| | - Kihoon Han
- Department of Neuroscience, Korea University College of Medicine, Seoul, Republic of Korea
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
- Kihoon Han
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2
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Kim NS, Ringeling FR, Zhou Y, Nguyen HN, Temme SJ, Lin YT, Eacker S, Dawson VL, Dawson TM, Xiao B, Hsu KS, Canzar S, Li W, Worley P, Christian KM, Yoon KJ, Song H, Ming GL. CYFIP1 Dosages Exhibit Divergent Behavioral Impact via Diametric Regulation of NMDA Receptor Complex Translation in Mouse Models of Psychiatric Disorders. Biol Psychiatry 2022; 92:815-826. [PMID: 34247782 PMCID: PMC8568734 DOI: 10.1016/j.biopsych.2021.04.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 01/09/2023]
Abstract
BACKGROUND Gene dosage imbalance caused by copy number variations (CNVs) is a prominent contributor to brain disorders. In particular, 15q11.2 CNV duplications and deletions have been associated with autism spectrum disorder and schizophrenia, respectively. The mechanism underlying these diametric contributions remains unclear. METHODS We established both loss-of-function and gain-of-function mouse models of Cyfip1, one of four genes within 15q11.2 CNVs. To assess the functional consequences of altered CYFIP1 levels, we performed systematic investigations on behavioral, electrophysiological, and biochemical phenotypes in both mouse models. In addition, we utilized RNA immunoprecipitation sequencing (RIP-seq) analysis to reveal molecular targets of CYFIP1 in vivo. RESULTS Cyfip1 loss-of-function and gain-of function mouse models exhibited distinct and shared behavioral abnormalities related to autism spectrum disorder and schizophrenia. RIP-seq analysis identified messenger RNA targets of CYFIP1 in vivo, including postsynaptic NMDA receptor (NMDAR) complex components. In addition, these mouse models showed diametric changes in levels of postsynaptic NMDAR complex components at synapses because of dysregulated protein translation, resulting in bidirectional alteration of NMDAR-mediated signaling. Importantly, pharmacological balancing of NMDAR signaling in these mouse models with diametric Cyfip1 dosages rescues behavioral abnormalities. CONCLUSIONS CYFIP1 regulates protein translation of NMDAR and associated complex components at synapses to maintain normal synaptic functions and behaviors. Our integrated analyses provide insight into how gene dosage imbalance caused by CNVs may contribute to divergent neuropsychiatric disorders.
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Affiliation(s)
- Nam-Shik Kim
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Francisca Rojas Ringeling
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland; Gene Center, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Ying Zhou
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ha Nam Nguyen
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Stephanie J Temme
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Yu-Ting Lin
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Stephen Eacker
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Valina L Dawson
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland; Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ted M Dawson
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland; Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Bo Xiao
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Kuei-Sen Hsu
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Stefan Canzar
- Gene Center, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Weidong Li
- Bio-X Institutes, Key Laboratory for the Genetics of Development and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China
| | - Paul Worley
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Kimberly M Christian
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Ki-Jun Yoon
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
| | - Hongjun Song
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Cell and Developmental Biology, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; Institute for Regenerative Medicine, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; Epigenetics Institute, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Guo-Li Ming
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Cell and Developmental Biology, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; Institute for Regenerative Medicine, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Psychiatry, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
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3
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Ma R, Pang K, Kang H, Zhang Y, Bang G, Park S, Hwang E, Ryu JR, Kwon Y, Kang HR, Jin C, Kim Y, Kim SY, Kwon SK, Kim D, Sun W, Kim JY, Han K. Protein interactome and cell-type expression analyses reveal that cytoplasmic FMR1-interacting protein 1 (CYFIP1), but not CYFIP2, associates with astrocytic focal adhesion. J Neurochem 2022; 162:190-206. [PMID: 35567753 DOI: 10.1111/jnc.15622] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 02/24/2022] [Accepted: 05/11/2022] [Indexed: 11/28/2022]
Abstract
The two members of the cytoplasmic FMR1-interacting protein family, CYFIP1 and CYFIP2, are evolutionarily conserved multifunctional proteins whose defects are associated with distinct types of brain disorders. Even with high sequence homology between CYFIP1 and CYFIP2, several lines of evidence indicate their different functions in the brain; however, the underlying mechanisms remain largely unknown. Here, we performed reciprocal immunoprecipitation experiments using CYFIP1-2×Myc and CYFIP2-3×Flag knock-in mice and found that CYFIP1 and CYFIP2 are not significantly co-immunoprecipitated with each other in the knock-in brains compared to negative control wild-type brains. Moreover, CYFIP1 and CYFIP2 showed different size distributions by size-exclusion chromatography of wild-type mouse brains. Specifically, mass spectrometry-based analysis of CYFIP1-2×Myc knock-in brains identified 131 proteins in the CYFIP1 interactome. Comparison of the CYFIP1 interactome with the previously identified brain region- and age-matched CYFIP2 interactome, consisting of 140 proteins, revealed only eight common proteins. Investigations using single-cell RNA-sequencing databases suggested non-neuronal cell- and neuron-enriched expression of Cyfip1 and Cyfip2, respectively. At the protein level, CYFIP1 was detected in both neurons and astrocytes, while CYFIP2 was detected only in neurons, suggesting the predominant expression of CYFIP1 in astrocytes. Bioinformatic characterization of the CYFIP1 interactome, and co-expression analysis of Cyfip1 with astrocytic genes, commonly linked CYFIP1 with focal adhesion proteins. Immunocytochemical analysis and proximity ligation assay suggested partial co-localization of CYFIP1 and focal adhesion proteins in cultured astrocytes. Together, these results suggest a CYFIP1-specific association with astrocytic focal adhesion, which may contribute to the different brain functions and dysfunctions of CYFIP1 and CYFIP2.
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Affiliation(s)
- Ruiying Ma
- Department of Neuroscience, Korea University College of Medicine, Seoul, 02841, Republic of Korea.,BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Kaifang Pang
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas, 77030, USA.,Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, Texas, 77030, USA
| | - Hyojin Kang
- Division of National Supercomputing, Korea Institute of Science and Technology Information (KISTI), Daejeon, 34141, Republic of Korea
| | - Yinhua Zhang
- Department of Neuroscience, Korea University College of Medicine, Seoul, 02841, Republic of Korea.,BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Geul Bang
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute (KBSI), Ochang 28119, Republic of Korea.,Korea University College of Pharmacy, Sejong, 30019, Republic of Korea
| | - Sangwoo Park
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute (KBSI), Ochang 28119, Republic of Korea
| | - Eunha Hwang
- Center for Research Equipment, Korea Basic Science Institute (KBSI), Ochang 28119, Republic of Korea
| | - Jae Ryun Ryu
- Department of Anatomy, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Yujin Kwon
- Therapeutics & Biotechnology Division, Drug discovery platform research center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea
| | - Hyae Rim Kang
- Department of Neuroscience, Korea University College of Medicine, Seoul, 02841, Republic of Korea.,BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Chunmei Jin
- Department of Neuroscience, Korea University College of Medicine, Seoul, 02841, Republic of Korea.,BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Yoonhee Kim
- Department of Neuroscience, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Su Yeon Kim
- Department of Neuroscience, Korea University College of Medicine, Seoul, 02841, Republic of Korea.,Korea Institute of Science and Technology (KIST), Brain Science Institute, Seoul, 02792, Republic of Korea
| | - Seok-Kyu Kwon
- Korea Institute of Science and Technology (KIST), Brain Science Institute, Seoul, 02792, Republic of Korea
| | - Doyoun Kim
- Therapeutics & Biotechnology Division, Drug discovery platform research center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea.,Medicinal Chemistry and Pharmacology, Korea University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Woong Sun
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea.,Department of Anatomy, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Jin Young Kim
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute (KBSI), Ochang 28119, Republic of Korea
| | - Kihoon Han
- Department of Neuroscience, Korea University College of Medicine, Seoul, 02841, Republic of Korea.,BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
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4
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Omelchenko T. Cellular protrusions in 3D: Orchestrating early mouse embryogenesis. Semin Cell Dev Biol 2022; 129:63-74. [PMID: 35577698 DOI: 10.1016/j.semcdb.2022.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/04/2022] [Accepted: 05/04/2022] [Indexed: 12/26/2022]
Abstract
Cellular protrusions generated by the actin cytoskeleton are central to the process of building the body of the embryo. Problems with cellular protrusions underlie human diseases and syndromes, including implantation defects and pregnancy loss, congenital birth defects, and cancer. Cells use protrusive activity together with actin-myosin contractility to create an ordered body shape of the embryo. Here, I review how actin-rich protrusions are used by two major morphological cell types, epithelial and mesenchymal cells, during collective cell migration to sculpt the mouse embryo body. Pre-gastrulation epithelial collective migration of the anterior visceral endoderm is essential for establishing the anterior-posterior body axis. Gastrulation mesenchymal collective migration of the mesoderm wings is crucial for body elongation, and somite and heart formation. Analysis of mouse mutants with disrupted cellular protrusions revealed the key role of protrusions in embryonic morphogenesis and embryo survival. Recent technical approaches have allowed examination of the mechanisms that control cell and tissue movements in vivo in the complex 3D microenvironment of living mouse embryos. Advancing our understanding of protrusion-driven morphogenesis should provide novel insights into human developmental disorders and cancer metastasis.
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Affiliation(s)
- Tatiana Omelchenko
- Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, 1230 York Avenue, New York 10065, USA.
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5
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Chaya T, Ishikane H, Varner LR, Sugita Y, Maeda Y, Tsutsumi R, Motooka D, Okuzaki D, Furukawa T. Deficiency of the neurodevelopmental disorder-associated gene Cyfip2 alters the retinal ganglion cell properties and visual acuity. Hum Mol Genet 2021; 31:535-547. [PMID: 34508581 PMCID: PMC8863419 DOI: 10.1093/hmg/ddab268] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/02/2021] [Accepted: 09/03/2021] [Indexed: 11/28/2022] Open
Abstract
Intellectual disability (ID) is a neurodevelopmental disorder affecting approximately 0.5–3% of the population in the developed world. Individuals with ID exhibit deficits in intelligence, impaired adaptive behavior and often visual impairments. Cytoplasmic fragile X mental retardation 1 (FMR1)-interacting protein 2 (CYFIP2) is an interacting partner of the FMR protein, whose loss results in fragile X syndrome, the most common inherited cause of ID. Recently, CYFIP2 variants have been found in patients with early-onset epileptic encephalopathy, developmental delay and ID. Such individuals often exhibit visual impairments; however, the underlying mechanism is poorly understood. In the present study, we investigated the role of Cyfip2 in retinal and visual functions by generating and analyzing Cyfip2 conditional knockout (CKO) mice. While we found no major differences in the layer structures and cell compositions between the control and Cyfip2 CKO retinas, a subset of genes associated with the transporter and channel activities was differentially expressed in Cyfip2 CKO retinas than in the controls. Multi-electrode array recordings showed more sustained and stronger responses to positive flashes of the ON ganglion cells in the Cyfip2 CKO retina than in the controls, although electroretinogram analysis revealed that Cyfip2 deficiency unaffected the photoreceptor and ON bipolar cell functions. Furthermore, analysis of initial and late phase optokinetic responses demonstrated that Cyfip2 deficiency impaired the visual function at the organismal level. Together, our results shed light on the molecular mechanism underlying the visual impairments observed in individuals with CYFIP2 variants and, more generally, in patients with neurodevelopmental disorders, including ID.
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Affiliation(s)
- Taro Chaya
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, Osaka, Japan
| | - Hiroshi Ishikane
- Department of Psychology, Faculty of Human Sciences, Senshu University, Kawasaki, Japan
| | - Leah R Varner
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, Osaka, Japan
| | - Yuko Sugita
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, Osaka, Japan
| | - Yamato Maeda
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, Osaka, Japan
| | - Ryotaro Tsutsumi
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, Osaka, Japan
| | - Daisuke Motooka
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Daisuke Okuzaki
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Takahisa Furukawa
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, Osaka, Japan
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6
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Zhang Y, Kang Hyae R, Lee SH, Kim Y, Ma R, Jin C, Lim JE, Kim S, Kang Y, Kang H, Kim SY, Kwon SK, Choi SY, Han K. Enhanced Prefrontal Neuronal Activity and Social Dominance Behavior in Postnatal Forebrain Excitatory Neuron-Specific Cyfip2 Knock-Out Mice. Front Mol Neurosci 2020; 13:574947. [PMID: 33192297 PMCID: PMC7658541 DOI: 10.3389/fnmol.2020.574947] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 09/29/2020] [Indexed: 02/03/2023] Open
Abstract
The cytoplasmic fragile X mental retardation 1 (FMR1)-interacting protein 2 (CYFIP2) gene is associated with epilepsy, intellectual disability (ID), and developmental delay, suggesting its critical role in proper neuronal development and function. CYFIP2 is involved in regulating cellular actin dynamics and also interacts with RNA-binding proteins. However, the adult brain function of CYFIP2 remains unclear because investigations thus far are limited to Cyfip2 heterozygous (Cyfip2+/- ) mice owing to the perinatal lethality of Cyfip2-null mice. Therefore, we generated Cyfip2 conditional knock-out (cKO) mice with reduced CYFIP2 expression in postnatal forebrain excitatory neurons (CaMKIIα-Cre). We found that in the medial prefrontal cortex (mPFC) of adult Cyfip2 cKO mice, CYFIP2 expression was decreased in both layer 2/3 (L2/3) and layer 5 (L5) neurons, unlike the L5-specific CYFIP2 reduction observed in adult Cyfip2+/- mice. Nevertheless, filamentous actin (F-actin) levels were increased only in L5 of Cyfip2 cKO mPFC possibly because of a compensatory increase in CYFIP1, the other member of CYFIP family, in L2/3 neurons. Abnormal dendritic spines on basal, but not on apical, dendrites were consistently observed in L5 neurons of Cyfip2 cKO mPFC. Meanwhile, neuronal excitability and activity were enhanced in both L2/3 and L5 neurons of Cyfip2 cKO mPFC, suggesting that CYFIP2 functions of regulating F-actin and excitability/activity may be mediated through independent mechanisms. Unexpectedly, adult Cyfip2 cKO mice did not display locomotor hyperactivity or reduced anxiety observed in Cyfip2+/- mice. Instead, both exhibited enhanced social dominance accessed by the tube test. Together, these results provide additional insights into the functions of CYFIP2 in the adult brain.
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Affiliation(s)
- Yinhua Zhang
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
| | - Rim Kang Hyae
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
| | - Seung-Hyun Lee
- Department of Physiology, Dental Research Institute, Seoul National University School of Dentistry, Seoul, South Korea
| | - Yoonhee Kim
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea
| | - Ruiying Ma
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
| | - Chunmei Jin
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
| | - Ji-Eun Lim
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea
| | - Seoyeon Kim
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea
| | - Yeju Kang
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea
| | - Hyojin Kang
- Division of National Supercomputing, Korea Institute of Science and Technology Information, Daejeon, South Korea
| | - Su Yeon Kim
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Center for Functional Connectomics, Korea Institute of Science and Technology, Brain Science Institute, Seoul, South Korea
| | - Seok-Kyu Kwon
- Center for Functional Connectomics, Korea Institute of Science and Technology, Brain Science Institute, Seoul, South Korea
| | - Se-Young Choi
- Department of Physiology, Dental Research Institute, Seoul National University School of Dentistry, Seoul, South Korea
| | - Kihoon Han
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
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7
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Lee Y, Zhang Y, Kang H, Bang G, Kim Y, Kang HR, Ma R, Jin C, Kim JY, Han K. Epilepsy- and intellectual disability-associated CYFIP2 interacts with both actin regulators and RNA-binding proteins in the neonatal mouse forebrain. Biochem Biophys Res Commun 2020; 529:1-6. [PMID: 32560809 DOI: 10.1016/j.bbrc.2020.05.221] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 05/31/2020] [Indexed: 12/29/2022]
Abstract
Variants of the cytoplasmic FMR1-interacting protein 2 (CYFIP2) gene are associated with early-onset epileptic encephalopathy, intellectual disability, and developmental delay. However, the current understanding of the molecular functions of CYFIP2 is limited to those related to actin dynamics, and thus, the detailed mechanisms of CYFIP2-associated brain disorders remain largely unknown. Here, we isolated the neonatal forebrain CYFIP2 complex using newly generated Cyfip2-3×Flag knock-in mice, and performed mass spectrometry-based analyses to identify proteins in the complex. The CYFIP2 interactome, consisting of 140 proteins, contained not only the expected actin regulators but also 25 RNA-binding proteins (RBPs) including Argonaute proteins. Functionally, overexpression of brain disorder-associated CYFIP2 R87 variants, but not wild-type, inhibited stress granule formation in HeLa cells. Mechanistically, the CYFIP2 R87 variants formed intracellular clusters with Argonaute proteins under both basal and stress conditions, and thereby possibly preventing their assembly into stress granules. Beyond identifying CYFIP2 interactors in vivo, these results may provide novel insights for better understanding the molecular mechanisms of CYFIP2-associated brain disorders.
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Affiliation(s)
- Yeunkum Lee
- Department of Neuroscience, College of Medicine, Korea University, Seoul, 02841, South Korea; Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, 02841, South Korea
| | - Yinhua Zhang
- Department of Neuroscience, College of Medicine, Korea University, Seoul, 02841, South Korea; Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, 02841, South Korea
| | - Hyojin Kang
- Division of National Supercomputing, KISTI, Daejeon, 34141, South Korea
| | - Geul Bang
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Ochang, 28119, South Korea; College of Pharmacy, Korea University, Sejong, 30019, South Korea
| | - Yoonhee Kim
- Department of Neuroscience, College of Medicine, Korea University, Seoul, 02841, South Korea
| | - Hyae Rim Kang
- Department of Neuroscience, College of Medicine, Korea University, Seoul, 02841, South Korea; Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, 02841, South Korea
| | - Ruiying Ma
- Department of Neuroscience, College of Medicine, Korea University, Seoul, 02841, South Korea
| | - Chunmei Jin
- Department of Neuroscience, College of Medicine, Korea University, Seoul, 02841, South Korea; Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, 02841, South Korea
| | - Jin Young Kim
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Ochang, 28119, South Korea.
| | - Kihoon Han
- Department of Neuroscience, College of Medicine, Korea University, Seoul, 02841, South Korea; Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, 02841, South Korea.
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8
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Rho GTPase Regulators and Effectors in Autism Spectrum Disorders: Animal Models and Insights for Therapeutics. Cells 2020; 9:cells9040835. [PMID: 32244264 PMCID: PMC7226772 DOI: 10.3390/cells9040835] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/22/2020] [Accepted: 03/26/2020] [Indexed: 12/18/2022] Open
Abstract
The Rho family GTPases are small G proteins that act as molecular switches shuttling between active and inactive forms. Rho GTPases are regulated by two classes of regulatory proteins, guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins (GAPs). Rho GTPases transduce the upstream signals to downstream effectors, thus regulating diverse cellular processes, such as growth, migration, adhesion, and differentiation. In particular, Rho GTPases play essential roles in regulating neuronal morphology and function. Recent evidence suggests that dysfunction of Rho GTPase signaling contributes substantially to the pathogenesis of autism spectrum disorder (ASD). It has been found that 20 genes encoding Rho GTPase regulators and effectors are listed as ASD risk genes by Simons foundation autism research initiative (SFARI). This review summarizes the clinical evidence, protein structure, and protein expression pattern of these 20 genes. Moreover, ASD-related behavioral phenotypes in animal models of these genes are reviewed, and the therapeutic approaches that show successful treatment effects in these animal models are discussed.
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9
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Zhang Y, Kang HR, Han K. Differential cell-type-expression of CYFIP1 and CYFIP2 in the adult mouse hippocampus. Anim Cells Syst (Seoul) 2019; 23:380-383. [PMID: 31853374 PMCID: PMC6913624 DOI: 10.1080/19768354.2019.1696406] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 11/14/2019] [Accepted: 11/14/2019] [Indexed: 01/04/2023] Open
Abstract
Recent molecular genetic studies have suggested that two members of the cytoplasmic FMR1-interacting protein (CYFIP) gene family, CYFIP1 and CYFIP2, are causally associated with several brain disorders. However, the clinical features of individuals with CYFIP1 and CYFIP2 variants are quite different. In addition, null mice for either Cyfip1 or Cyfip2 are lethal, indicating that these two genes cannot compensate for each other in vivo. Although these results strongly suggest that CYFIP1 and CYFIP2 have distinct functions in vivo, the detailed mechanisms underlying their differences remain enigmatic and unexplored, especially considering their high sequence homology. To address this, we analyzed a recently established mouse brain single-cell RNA sequencing (scRNAseq) database and found that Cyfip1 and Cyfip2 are dominantly expressed in non-neurons and neurons, respectively, in all tested brain regions. To validate these observations, we performed fluorescent immunohistochemistry in the adult mouse hippocampus with either a CYFIP1 or CYFIP2 antibody combined with antibodies for various cell-type-specific markers. Consistent with our analysis of the scRNAseq database, CYFIP1 signals were detected in both neurons and astrocytes, while CYFIP2 signals were mainly detected in neurons. These results suggest differential cell-type-expression of CYFIP1 and CYFIP2 in vivo, which provides novel insights into our understanding of the pathophysiology of and potential treatments for CYFIP-associated brain disorders.
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Affiliation(s)
- Yinhua Zhang
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
| | - Hyae Rim Kang
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
| | - Kihoon Han
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
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10
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Zhang Y, Lee Y, Han K. Neuronal function and dysfunction of CYFIP2: from actin dynamics to early infantile epileptic encephalopathy. BMB Rep 2019. [PMID: 30982501 PMCID: PMC6549915 DOI: 10.5483/bmbrep.2019.52.5.097] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The cytoplasmic FMR1-interacting protein family (CYFIP1 and CYFIP2) are evolutionarily conserved proteins originally identified as binding partners of the fragile X mental retardation protein (FMRP), a messenger RNA (mRNA)-binding protein whose loss causes the fragile X syndrome. Moreover, CYFIP is a key component of the heteropentameric WAVE regulatory complex (WRC), a critical regulator of neuronal actin dynamics. Therefore, CYFIP may play key roles in regulating both mRNA translation and actin polymerization, which are critically involved in proper neuronal development and function. Nevertheless, compared to CYFIP1, neuronal function and dysfunction of CYFIP2 remain largely unknown, possibly due to the relatively less well established association between CYFIP2 and brain disorders. Despite high amino acid sequence homology between CYFIP1 and CYFIP2, several in vitro and animal model studies have suggested that CYFIP2 has some unique neuronal functions distinct from those of CYFIP1. Furthermore, recent whole-exome sequencing studies identified de novo hot spot variants of CYFIP2 in patients with early infantile epileptic encephalopathy (EIEE), clearly implicating CYFIP2 dysfunction in neurological disorders. In this review, we highlight these recent investigations into the neuronal function and dysfunction of CYFIP2, and also discuss several key questions remaining about this intriguing neuronal protein.
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Affiliation(s)
- Yinhua Zhang
- Departments of Neuroscience, and Biomedical Sciences, College of Medicine, Korea University, Seoul 02841, Korea
| | - Yeunkum Lee
- Departments of Neuroscience, and Biomedical Sciences, College of Medicine, Korea University, Seoul 02841, Korea
| | - Kihoon Han
- Departments of Neuroscience, and Biomedical Sciences, College of Medicine, Korea University, Seoul 02841, Korea
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11
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Babbs RK, Beierle JA, Ruan QT, Kelliher JC, Chen MM, Feng AX, Kirkpatrick SL, Benitez FA, Rodriguez FA, Pierre JJ, Anandakumar J, Kumar V, Mulligan MK, Bryant CD. Cyfip1 Haploinsufficiency Increases Compulsive-Like Behavior and Modulates Palatable Food Intake in Mice: Dependence on Cyfip2 Genetic Background, Parent-of Origin, and Sex. G3 (BETHESDA, MD.) 2019; 9:3009-3022. [PMID: 31324746 PMCID: PMC6723122 DOI: 10.1534/g3.119.400470] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 07/18/2019] [Indexed: 12/11/2022]
Abstract
Binge eating (BE) is a heritable trait associated with eating disorders and involves episodes of rapid, large amounts of food consumption. We previously identified cytoplasmic FMR1-interacting protein 2 (Cyfip2) as a genetic factor underlying compulsive-like BE in mice. CYFIP2 is a homolog of CYFIP1 which is one of four paternally-deleted genes in patients with Type I Prader-Willi Syndrome (PWS), a neurodevelopmental disorder whereby 70% of cases involve paternal 15q11-q13 deletion. PWS symptoms include hyperphagia, obesity (if untreated), cognitive deficits, and obsessive-compulsive behaviors. We tested whether Cyfip1 haploinsufficiency (+/-) would enhance compulsive-like behavior and palatable food (PF) intake in a parental origin- and sex-dependent manner on two Cyfip2 genetic backgrounds, including the BE-prone C57BL/6N (Cyfip2N/N) background and the BE-resistant C57BL/6J (Cyfip2J/J) background. Cyfip1+/- mice showed increased compulsive-like behavior on both backgrounds and increased PF intake on the Cyfip2N/N background. In contrast, maternal Cyfip1 haploinsufficiency on the BE-resistant Cyfip2J/J background induced a robust escalation in PF intake in wild-type Cyfip1J/J males while having no effect in Cyfip1J/- males. Notably, induction of behavioral phenotypes in wild-type males following maternal Fmr1+/- has previously been reported. In the hypothalamus, there was a paternally-enhanced reduction in CYFIP1 protein whereas in the nucleus accumbens, there was a maternally-enhanced reduction in CYFIP1 protein. Nochange in FMR1 protein (FMRP) was observed in Cyfip1+/- mice, regardless of parental origin. To summarize, Cyfip1 haploinsufficiency increased compulsive-like behavior and induced genetic background-dependent, sex-dependent, and parent-of-origin-dependent effects on PF consumption and CYFIP1 expression that could have relevance for neurodevelopmental and neuropsychiatric disorders.
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Affiliation(s)
- Richard K Babbs
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
| | - Jacob A Beierle
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
- T32 NIGMS Training Program in Biomolecular Pharmacology
- Boston University's Transformative Training Program in Addiction Science (TTPAS), Biomedical Genetics, Boston University School of Medicine, Boston, MA 02118
| | - Qiu T Ruan
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
- T32 NIGMS Training Program in Biomolecular Pharmacology
- Boston University's Transformative Training Program in Addiction Science (TTPAS), Biomedical Genetics, Boston University School of Medicine, Boston, MA 02118
| | - Julia C Kelliher
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
| | - Melanie M Chen
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
| | - Ashley X Feng
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
| | - Stacey L Kirkpatrick
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
| | - Fabiola A Benitez
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
| | - Fred A Rodriguez
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
| | - Johanne J Pierre
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
| | - Jeya Anandakumar
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
| | - Vivek Kumar
- The Jackson Laboratory, 600 Main St., Bar Harbor, ME 04609, and
| | - Megan K Mulligan
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, 71 S. Manassas St, Memphis, TN 38163
| | - Camron D Bryant
- Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry
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12
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Domínguez-Iturza N, Lo AC, Shah D, Armendáriz M, Vannelli A, Mercaldo V, Trusel M, Li KW, Gastaldo D, Santos AR, Callaerts-Vegh Z, D'Hooge R, Mameli M, Van der Linden A, Smit AB, Achsel T, Bagni C. The autism- and schizophrenia-associated protein CYFIP1 regulates bilateral brain connectivity and behaviour. Nat Commun 2019; 10:3454. [PMID: 31371726 PMCID: PMC6672001 DOI: 10.1038/s41467-019-11203-y] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 06/20/2019] [Indexed: 12/26/2022] Open
Abstract
Copy-number variants of the CYFIP1 gene in humans have been linked to autism spectrum disorders (ASD) and schizophrenia (SCZ), two neuropsychiatric disorders characterized by defects in brain connectivity. Here, we show that CYFIP1 plays an important role in brain functional connectivity and callosal functions. We find that Cyfip1-heterozygous mice have reduced functional connectivity and defects in white matter architecture, similar to phenotypes found in patients with ASD, SCZ and other neuropsychiatric disorders. Cyfip1-deficient mice also present decreased myelination in the callosal axons, altered presynaptic function, and impaired bilateral connectivity. Finally, Cyfip1 deficiency leads to abnormalities in motor coordination, sensorimotor gating and sensory perception, which are also known neuropsychiatric disorder-related symptoms. These results show that Cyfip1 haploinsufficiency compromises brain connectivity and function, which might explain its genetic association to neuropsychiatric disorders.
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Affiliation(s)
- Nuria Domínguez-Iturza
- Department of Fundamental Neurosciences, University of Lausanne, 1005, Lausanne, Switzerland
- Department of Human Genetics KU Leuven, VIB Center for Brain & Disease Research, 3000, Leuven, Belgium
| | - Adrian C Lo
- Department of Fundamental Neurosciences, University of Lausanne, 1005, Lausanne, Switzerland
| | - Disha Shah
- Department of Biomedical Sciences, Bio-Imaging Laboratory, University of Antwerp, 2610, Antwerp, Belgium
- Department of Neuroscience KU Leuven, VIB Center for Brain & Disease Research, 3000, Leuven, Belgium
| | - Marcelo Armendáriz
- Department of Neurosciences, Laboratory of Neuro- and Psychophysiology, KU Leuven, 3000, Leuven, Belgium
| | - Anna Vannelli
- Department of Fundamental Neurosciences, University of Lausanne, 1005, Lausanne, Switzerland
| | - Valentina Mercaldo
- Department of Fundamental Neurosciences, University of Lausanne, 1005, Lausanne, Switzerland
| | - Massimo Trusel
- Department of Fundamental Neurosciences, University of Lausanne, 1005, Lausanne, Switzerland
| | - Ka Wan Li
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, VU University Amsterdam, 1081, Amsterdam, The Netherlands
| | - Denise Gastaldo
- Department of Fundamental Neurosciences, University of Lausanne, 1005, Lausanne, Switzerland
| | - Ana Rita Santos
- Department of Human Genetics KU Leuven, VIB Center for Brain & Disease Research, 3000, Leuven, Belgium
- VIB Discovery Sciences, Bioincubator, 3001, Heverlee, Belgium
| | - Zsuzsanna Callaerts-Vegh
- Faculty of Psychology and Educational Sciences, KU Leuven, Laboratory of Biological Psychology, 3000, Leuven, Belgium
| | - Rudi D'Hooge
- Faculty of Psychology and Educational Sciences, KU Leuven, Laboratory of Biological Psychology, 3000, Leuven, Belgium
| | - Manuel Mameli
- Department of Fundamental Neurosciences, University of Lausanne, 1005, Lausanne, Switzerland
| | - Annemie Van der Linden
- Department of Biomedical Sciences, Bio-Imaging Laboratory, University of Antwerp, 2610, Antwerp, Belgium
| | - August B Smit
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, VU University Amsterdam, 1081, Amsterdam, The Netherlands
| | - Tilmann Achsel
- Department of Fundamental Neurosciences, University of Lausanne, 1005, Lausanne, Switzerland
- Department of Human Genetics KU Leuven, VIB Center for Brain & Disease Research, 3000, Leuven, Belgium
| | - Claudia Bagni
- Department of Fundamental Neurosciences, University of Lausanne, 1005, Lausanne, Switzerland.
- Department of Human Genetics KU Leuven, VIB Center for Brain & Disease Research, 3000, Leuven, Belgium.
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, 00133, Rome, Italy.
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13
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Davis KW, Serrano M, Loddo S, Robinson C, Alesi V, Dallapiccola B, Novelli A, Butler MG. Parent-of-Origin Effects in 15q11.2 BP1-BP2 Microdeletion (Burnside-Butler) Syndrome. Int J Mol Sci 2019; 20:E1459. [PMID: 30909440 PMCID: PMC6470921 DOI: 10.3390/ijms20061459] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/20/2019] [Accepted: 03/21/2019] [Indexed: 01/01/2023] Open
Abstract
To identify whether parent-of-origin effects (POE) of the 15q11.2 BP1-BP2 microdeletion are associated with differences in clinical features in individuals inheriting the deletion, we collected 71 individuals reported with phenotypic data and known inheritance from a clinical cohort, a research cohort, the DECIPHER database, and the primary literature. Chi-squared and Mann-Whitney U tests were used to test for differences in specific and grouped clinical symptoms based on parental inheritance and proband gender. Analyses controlled for sibling sets and individuals with additional variants of uncertain significance (VOUS). Among all probands, maternal deletions were associated with macrocephaly (p = 0.016) and autism spectrum disorder (ASD; p = 0.02), while paternal deletions were associated with congenital heart disease (CHD; p = 0.004). Excluding sibling sets, maternal deletions were associated with epilepsy as well as macrocephaly (p < 0.05), while paternal deletions were associated with CHD and abnormal muscular phenotypes (p < 0.05). Excluding sibling sets and probands with an additional VOUS, maternal deletions were associated with epilepsy (p = 0.019) and paternal deletions associated with muscular phenotypes (p = 0.008). Significant gender-based differences were also observed. Our results supported POEs of this deletion and included macrocephaly, epilepsy and ASD in maternal deletions with CHD and abnormal muscular phenotypes seen in paternal deletions.
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Affiliation(s)
| | | | - Sara Loddo
- Laboratory of Medical Genetics, Bambino Gesù Children's Hospital, IRCCS, Rome 00165, Italy.
| | | | - Viola Alesi
- Laboratory of Medical Genetics, Bambino Gesù Children's Hospital, IRCCS, Rome 00165, Italy.
| | - Bruno Dallapiccola
- Laboratory of Medical Genetics, Bambino Gesù Children's Hospital, IRCCS, Rome 00165, Italy.
| | - Antonio Novelli
- Laboratory of Medical Genetics, Bambino Gesù Children's Hospital, IRCCS, Rome 00165, Italy.
| | - Merlin G Butler
- Departments of Psychiatry & Behavioral Sciences and Pediatrics, University of Kansas Medical Center, Kansas City, KS 66160, USA.
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14
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Bachmann SO, Sledziowska M, Cross E, Kalbassi S, Waldron S, Chen F, Ranson A, Baudouin SJ. Behavioral training rescues motor deficits in Cyfip1 haploinsufficiency mouse model of autism spectrum disorders. Transl Psychiatry 2019; 9:29. [PMID: 30664619 PMCID: PMC6341103 DOI: 10.1038/s41398-018-0338-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 11/15/2018] [Accepted: 11/25/2018] [Indexed: 12/27/2022] Open
Abstract
Deletions in the 15q11.2 region of the human genome are associated with neurobehavioral deficits, and motor development delay, as well as in some cases, symptoms of autism or schizophrenia. The cytoplasmic FMRP-interacting protein 1 (CYFIP1) is one of the four genes contained within this locus and has been associated with other genetic forms of autism spectrum disorders (ASD). In mice, Cyfip1 haploinsufficiency leads to alteration of dendritic spine morphology and defects in synaptic plasticity, two pathophysiological hallmarks of mouse models of ASD. At the behavioral level, however, Cyfip1 haploinsufficiency leads to minor phenotypes, not directly relevant for 15q11.2 deletion syndrome or ASD. A fundamental question is whether neuronal phenotypes caused by the mutation of Cyfip1 are relevant for the human condition. Here, we describe a synaptic cluster of ASD-associated proteins centered on CYFIP1 and the adhesion protein Neuroligin-3. Cyfip1 haploinsufficiency in mice led to decreased dendritic spine density and stability associated with social behavior and motor learning phenotypes. Behavioral training early in development resulted in alleviating the motor learning deficits caused by Cyfip1 haploinsufficiency. Altogether, these data provide new insight into the neuronal and behavioral phenotypes caused by Cyfip1 mutation and proof-of-concept for the development of a behavioral therapy to treat phenotypes associated with 15q11.2 syndromes and ASD.
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Affiliation(s)
- Sven O. Bachmann
- 0000 0001 0807 5670grid.5600.3School of Biosciences, Cardiff University, Cardiff, CF10 3AX Wales UK
| | - Monika Sledziowska
- 0000 0001 0807 5670grid.5600.3School of Biosciences, Cardiff University, Cardiff, CF10 3AX Wales UK
| | - Ellen Cross
- 0000 0001 0807 5670grid.5600.3School of Biosciences, Cardiff University, Cardiff, CF10 3AX Wales UK
| | - Shireene Kalbassi
- 0000 0001 0807 5670grid.5600.3School of Biosciences, Cardiff University, Cardiff, CF10 3AX Wales UK
| | - Sophie Waldron
- 0000 0001 0807 5670grid.5600.3School of Biosciences, Cardiff University, Cardiff, CF10 3AX Wales UK
| | - Fangli Chen
- 0000 0001 0807 5670grid.5600.3Neuroscience and Mental Health Research Institute, School of Medicine, Cardiff University, Cardiff, CF24 4HQ UK
| | - Adam Ranson
- Neuroscience and Mental Health Research Institute, School of Medicine, Cardiff University, Cardiff, CF24 4HQ, UK. .,Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, Barcelona, Spain.
| | - Stéphane J. Baudouin
- 0000 0001 0807 5670grid.5600.3School of Biosciences, Cardiff University, Cardiff, CF10 3AX Wales UK
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15
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Zhang Y, Kang H, Lee Y, Kim Y, Lee B, Kim JY, Jin C, Kim S, Kim H, Han K. Smaller Body Size, Early Postnatal Lethality, and Cortical Extracellular Matrix-Related Gene Expression Changes of Cyfip2-Null Embryonic Mice. Front Mol Neurosci 2019; 11:482. [PMID: 30687000 PMCID: PMC6338024 DOI: 10.3389/fnmol.2018.00482] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 12/11/2018] [Indexed: 11/13/2022] Open
Abstract
Cytoplasmic FMR1-interacting protein 2 (CYFIP2) is a key component of the WAVE regulatory complex (WRC) which regulates actin polymerization and branching in diverse cellular compartments. Recent whole exome sequencing studies identified de novo hotspot variants in CYFIP2 from patients with early-onset epileptic encephalopathy and microcephaly, suggesting that CYFIP2 may have some functions in embryonic brain development. Although perinatal lethality of Cyfip2-null (Cyfip2 -/-) mice was reported, the exact developmental time point and cause of lethality, and whether Cyfip2 -/- embryonic mice have brain abnormalities remain unknown. We found that endogenous Cyfip2 is mainly expressed in the brain, spinal cord, and thymus of mice at late embryonic stages. Cyfip2 -/- embryos did not show lethality at embryonic day 18.5 (E18.5), but their body size was smaller than that of wild-type (WT) or Cyfip2 +/- littermates. Meanwhile, at postnatal day 0, all identified Cyfip2 -/- mice were found dead, suggesting early postnatal lethality of the mice. Nevertheless, the brain size and cortical cytoarchitecture were comparable among WT, Cyfip2 +/-, and Cyfip2 -/- mice at E18.5. Using RNA-sequencing analyses, we identified 98 and 72 differentially expressed genes (DEGs) from the E18.5 cortex of Cyfip2 +/- and Cyfip2 -/- mice, respectively. Further bioinformatic analyses suggested that extracellular matrix (ECM)-related gene expression changes in Cyfip2 -/- embryonic cortex. Together, our results suggest that CYFIP2 is critical for embryonic body growth and for early postnatal survival, and that loss of its expression leads to ECM-related gene expression changes in the embryonic cortex without severe gross morphological defects.
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Affiliation(s)
- Yinhua Zhang
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
| | - Hyojin Kang
- Division of National Supercomputing, KISTI, Daejeon, South Korea
| | - Yeunkum Lee
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
| | - Yoonhee Kim
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea
| | - Bokyoung Lee
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea
| | - Jin Yong Kim
- Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea.,Department of Anatomy, College of Medicine, Korea University, Seoul, South Korea
| | - Chunmei Jin
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
| | - Shinhyun Kim
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
| | - Hyun Kim
- Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea.,Department of Anatomy, College of Medicine, Korea University, Seoul, South Korea
| | - Kihoon Han
- Department of Neuroscience, College of Medicine, Korea University, Seoul, South Korea.,Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, South Korea
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16
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Phosphorylation of CYFIP2, a component of the WAVE-regulatory complex, regulates dendritic spine density and neurite outgrowth in cultured hippocampal neurons potentially by affecting the complex assembly. Neuroreport 2018; 28:749-754. [PMID: 28692454 DOI: 10.1097/wnr.0000000000000838] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Actin dynamics is a critical mechanism underlying many cellular processes in neurons. The heteropentameric WAVE-regulatory complex (WRC), consisting of WAVE, CYFIP1/2, Nap, Abi, and HSPC300, is a key regulator of actin dynamics that activates the Arp2/3 complex to initiate actin polymerization and branching. The WRC is basally inactive because of intermolecular interactions among the components, which can be modulated by bindings of phospholipids and Rac1, and phosphorylations of WAVE and Abi. However, the phosphorylation of other components of WRC and their functional significance remain largely unknown. To address this issue, we focused on CYFIP1/2, in which we found two brain-specific phosphorylation sites (S582 of CYFIP2 and T1068/T1067 of CYFIP1/2) from a publicly available phosphoproteome database. To understand their functional effects, we overexpressed wild-type, phospho-blocking, or phospho-mimetic mutants of CYFIP2 in cultured hippocampal neurons, and found that only T1067A CYFIP2 decreased the density of stubby spines. Moreover, overexpression of wild-type CYFIP2 increased neurite length, but T1067A did not exert this effect. To understand the mechanism, we modeled CYFIP2 phosphorylation in the crystal structure of WRC and found that T1067 phosphorylation could weaken the interaction between CYFIP2 and Nap1 by inducing conformational changes of CYFIP2 α-helical bundles. In the co-immunoprecipitation assay, however, wild-type, T1067A, and T1067E CYFIP2 showed similar interaction levels to Nap1, suggesting that T1067 phosphorylation alone is not sufficient to disrupt the interaction. Considering that the activation of WRC requires disassembly of the complex, our results suggest that T1067 phosphorylation, together with other factors, could contribute toward the activation process.
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17
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Woo YJ, Wang T, Guadalupe T, Nebel RA, Vino A, Del Bene VA, Molholm S, Ross LA, Zwiers MP, Fisher SE, Foxe JJ, Abrahams BS. A Common CYFIP1 Variant at the 15q11.2 Disease Locus Is Associated with Structural Variation at the Language-Related Left Supramarginal Gyrus. PLoS One 2016; 11:e0158036. [PMID: 27351196 PMCID: PMC4924813 DOI: 10.1371/journal.pone.0158036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 06/09/2016] [Indexed: 01/03/2023] Open
Abstract
Copy number variants (CNVs) at the Breakpoint 1 to Breakpoint 2 region at 15q11.2 (BP1-2) are associated with language-related difficulties and increased risk for developmental disorders in which language is compromised. Towards underlying mechanisms, we investigated relationships between single nucleotide polymorphisms (SNPs) across the region and quantitative measures of human brain structure obtained by magnetic resonance imaging of healthy subjects. We report an association between rs4778298, a common variant at CYFIP1, and inter-individual variation in surface area across the left supramarginal gyrus (lh.SMG), a cortical structure implicated in speech and language in independent discovery (n = 100) and validation cohorts (n = 2621). In silico analyses determined that this same variant, and others nearby, is also associated with differences in levels of CYFIP1 mRNA in human brain. One of these nearby polymorphisms is predicted to disrupt a consensus binding site for FOXP2, a transcription factor implicated in speech and language. Consistent with a model where FOXP2 regulates CYFIP1 levels and in turn influences lh.SMG surface area, analysis of publically available expression data identified a relationship between expression of FOXP2 and CYFIP1 mRNA in human brain. We propose that altered CYFIP1 dosage, through aberrant patterning of the lh.SMG, may contribute to language-related difficulties associated with BP1-2 CNVs. More generally, this approach may be useful in clarifying the contribution of individual genes at CNV risk loci.
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Affiliation(s)
- Young Jae Woo
- Department of Genetics, Albert Einstein College of Medicine, Bronx, United States of America
| | - Tao Wang
- Department of Epidemiology & Population Health, Albert Einstein College of Medicine, Bronx, United States of America
| | - Tulio Guadalupe
- Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands
| | - Rebecca A. Nebel
- Department of Genetics, Albert Einstein College of Medicine, Bronx, United States of America
| | - Arianna Vino
- Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands
| | - Victor A. Del Bene
- The Sheryl and Daniel R. Tishman Cognitive Neurophysiology Laboratory, Children's Evaluation and Rehabilitation Center (CERC), Albert Einstein College of Medicine, Bronx, United States of America
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, United States of America
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, United States of America
| | - Sophie Molholm
- The Sheryl and Daniel R. Tishman Cognitive Neurophysiology Laboratory, Children's Evaluation and Rehabilitation Center (CERC), Albert Einstein College of Medicine, Bronx, United States of America
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, United States of America
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, United States of America
| | - Lars A. Ross
- The Sheryl and Daniel R. Tishman Cognitive Neurophysiology Laboratory, Children's Evaluation and Rehabilitation Center (CERC), Albert Einstein College of Medicine, Bronx, United States of America
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, United States of America
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, United States of America
| | - Marcel P. Zwiers
- Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands
| | - Simon E. Fisher
- Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands
- Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands
| | - John J. Foxe
- The Sheryl and Daniel R. Tishman Cognitive Neurophysiology Laboratory, Children's Evaluation and Rehabilitation Center (CERC), Albert Einstein College of Medicine, Bronx, United States of America
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, United States of America
- The Cognitive Neurophysiology Laboratory, Nathan S. Kline Institute for Psychiatric Research, Orangeburg, United States of America
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, United States of America
| | - Brett S. Abrahams
- Department of Genetics, Albert Einstein College of Medicine, Bronx, United States of America
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, United States of America
- * E-mail:
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