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Shitasako S, Ito Y, Ito R, Ueda Y, Shimizu Y, Ohshima T. Wnt and Shh signals regulate neural stem cell proliferation and differentiation in the optic tectum of adult zebrafish. Dev Neurobiol 2017; 77:1206-1220. [DOI: 10.1002/dneu.22509] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 03/29/2017] [Accepted: 06/02/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Shiori Shitasako
- Department of Life Science and Medical Bio-Science; Waseda University, 2-2 Wakamatsu-cho; Shinjuku-ku Tokyo 162-8480 Japan
| | - Yoko Ito
- Department of Life Science and Medical Bio-Science; Waseda University, 2-2 Wakamatsu-cho; Shinjuku-ku Tokyo 162-8480 Japan
| | - Ryoichi Ito
- Department of Life Science and Medical Bio-Science; Waseda University, 2-2 Wakamatsu-cho; Shinjuku-ku Tokyo 162-8480 Japan
| | - Yuto Ueda
- Department of Life Science and Medical Bio-Science; Waseda University, 2-2 Wakamatsu-cho; Shinjuku-ku Tokyo 162-8480 Japan
| | - Yuki Shimizu
- Department of Life Science and Medical Bio-Science; Waseda University, 2-2 Wakamatsu-cho; Shinjuku-ku Tokyo 162-8480 Japan
| | - Toshio Ohshima
- Department of Life Science and Medical Bio-Science; Waseda University, 2-2 Wakamatsu-cho; Shinjuku-ku Tokyo 162-8480 Japan
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Hot B, Valnohova J, Arthofer E, Simon K, Shin J, Uhlén M, Kostenis E, Mulder J, Schulte G. FZD 10-Gα 13 signalling axis points to a role of FZD 10 in CNS angiogenesis. Cell Signal 2017; 32:93-103. [PMID: 28126591 DOI: 10.1016/j.cellsig.2017.01.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 01/09/2017] [Accepted: 01/21/2017] [Indexed: 12/20/2022]
Abstract
Among the 10 Frizzled (FZD) isoforms belonging to the Class F of G protein-coupled receptors (GPCRs), FZD10 remains the most enigmatic. FZD10 shows homology to FZD4 and FZD9 and was previously implicated in both β-catenin-dependent and -independent signalling. In normal tissue, FZD10 levels are generally very low; however, its upregulation in synovial carcinoma has attracted some attention for therapy. Our findings identify FZD10 as a receptor interacting with and signalling through the heterotrimeric G protein Gα13 but not Gα12, Gαi1, GαoA, Gαs, or Gαq. Stimulation with the FZD agonist WNT induced the dissociation of the Gα13 protein from FZD10, and led to global Gα12/13-dependent cell changes assessed by dynamic mass redistribution measurements. Furthermore, we show that FZD10 mediates Gα12/13 activation-dependent induction of YAP/TAZ transcriptional activity. In addition, we show a distinct expression of FZD10 in embryonic CNS endothelial cells at E11.5-E14.5. Given the well-known importance of Gα13 signalling for the development of the vascular system, the selective expression of FZD10 in brain vascular endothelial cells points at a potential role of FZD10-Gα13 signalling in CNS angiogenesis.
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Affiliation(s)
- Belma Hot
- Section of Receptor Biology & Signaling, Dept. Physiology & Pharmacology, Karolinska Institutet, S17177 Stockholm, Sweden
| | - Jana Valnohova
- Section of Receptor Biology & Signaling, Dept. Physiology & Pharmacology, Karolinska Institutet, S17177 Stockholm, Sweden
| | - Elisa Arthofer
- Section of Receptor Biology & Signaling, Dept. Physiology & Pharmacology, Karolinska Institutet, S17177 Stockholm, Sweden; Section on Molecular Signal Transduction Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 35A Convent Drive, MSC 3752, Bethesda, MD 20892-3752, USA
| | - Katharina Simon
- Molecular, Cellular and Pharmacobiology Section, Institute for Pharmaceutical Biology, University of Bonn, Bonn, Germany
| | - Jaekyung Shin
- Science for Life Laboratory, Department of Neuroscience, Karolinska Institute, SE-171 77 Stockholm, Sweden
| | - Mathias Uhlén
- Science for Life Laboratory, KTH-Royal Institute of Technology, SE-17121 Stockholm, Sweden
| | - Evi Kostenis
- Molecular, Cellular and Pharmacobiology Section, Institute for Pharmaceutical Biology, University of Bonn, Bonn, Germany
| | - Jan Mulder
- Science for Life Laboratory, Department of Neuroscience, Karolinska Institute, SE-171 77 Stockholm, Sweden
| | - Gunnar Schulte
- Section of Receptor Biology & Signaling, Dept. Physiology & Pharmacology, Karolinska Institutet, S17177 Stockholm, Sweden; Faculty of Science, Institute of Experimental Biology, Masaryk University, Brno, Czech Republic.
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Caron A, Xu X, Lin X. Wnt/β-catenin signaling directly regulates Foxj1 expression and ciliogenesis in zebrafish Kupffer's vesicle. Development 2011; 139:514-24. [PMID: 22190638 DOI: 10.1242/dev.071746] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Cilia are essential for normal development. The composition and assembly of cilia has been well characterized, but the signaling and transcriptional pathways that govern ciliogenesis remain poorly studied. Here, we report that Wnt/β-catenin signaling directly regulates ciliogenic transcription factor foxj1a expression and ciliogenesis in zebrafish Kupffer's vesicle (KV). We show that Wnt signaling acts temporally and KV cell-autonomously to control left-right (LR) axis determination and ciliogenesis. Specifically, reduction of Wnt signaling leads to a disruption of LR patterning, shorter and fewer cilia, a loss of cilia motility and a downregulation of foxj1a expression. However, these phenotypes can be rescued by KV-targeted overexpression of foxj1a. In comparison to the FGF pathway that has been previously implicated in the control of ciliogenesis, our epistatic studies suggest a more downstream function of Wnt signaling in the regulation of foxj1a expression and ciliogenesis in KV. Importantly, enhancer analysis reveals that KV-specific expression of foxj1a requires the presence of putative Lef1/Tcf binding sites, indicating that Wnt signaling activates foxj1a transcription directly. We also find that impaired Wnt signaling leads to kidney cysts and otolith disorganization, which can be attributed to a loss of foxj1 expression and disrupted ciliogenesis in the developing pronephric ducts and otic vesicles. Together, our data reveal a novel role of Wnt/β-catenin signaling upstream of ciliogenesis, which might be a general developmental mechanism beyond KV. Moreover, our results also prompt a hypothesis that certain developmental effects of the Wnt/β-catenin pathway are due to the activation of Foxj1 and cilia formation.
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Affiliation(s)
- Alissa Caron
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
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Garcia-Morales C, Liu CH, Abu-Elmagd M, Hajihosseini MK, Wheeler GN. Frizzled-10 promotes sensory neuron development in Xenopus embryos. Dev Biol 2009; 335:143-55. [PMID: 19716814 DOI: 10.1016/j.ydbio.2009.08.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Revised: 08/20/2009] [Accepted: 08/21/2009] [Indexed: 12/23/2022]
Abstract
Formation of the vertebrate nervous system requires coordinated cell-cell interactions, intracellular signalling events, gene transcription, and morphogenetic cell movements. Wnt signalling has been involved in regulating a wide variety of biological processes such as embryonic patterning, cell proliferation, cell polarity, motility, and the specification of cell fate. Wnt ligands associate with their receptors, members of the frizzled family (Fz). In Xenopus, five members of the frizzled family are expressed in the early nervous system. We have investigated the role of Xenopus frizzled-10 (Fz10) in neural development. We show that Fz10 is expressed in the dorsal neural ectoderm and neural folds in the region where primary sensory neurons develop. Fz10 mediates canonical Wnt signalling and interacts with Wnt1 and Wnt8 but not Wnt3a as shown in synergy assays. We find that Fz10 is required for the late stages of sensory neuron differentiation. Overexpression of Fz10 in Xenopus leads to an increase in the number of sensory neurons. Loss of Fz10 function using morpholinos inhibits the development of sensory neurons in Xenopus at later stages of neurogenesis and this can be rescued by co-injection of modified Fz10B and beta-catenin. In mouse P19 cells induced by retinoic acid to undergo neural differentiation, overexpression of Xenopus Fz10 leads to an increase in the number of neurons generated while siRNA knockdown of endogenous mouse Fz10 inhibits neurogenesis. Thus we propose Fz10 mediates Wnt1 signalling to determine sensory neural differentiation in Xenopus in vivo and in mouse cell culture.
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Yan Y, Li Y, Hu C, Gu X, Liu J, Hu YA, Yang Y, Wei Y, Zhao C. Expression of Frizzled10 in mouse central nervous system. Gene Expr Patterns 2008; 9:173-7. [PMID: 19056517 DOI: 10.1016/j.gep.2008.11.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2008] [Revised: 10/21/2008] [Accepted: 11/12/2008] [Indexed: 12/24/2022]
Abstract
Frizzled transmembrane proteins (Fzd) are receptors of Wnts, and they play key roles during central nervous system (CNS) development in vertebrates. Here we report the expression pattern of Frizzled10 in mouse CNS from embryonic stages to adulthood. Frizzled10 is expressed strongly at embryonic days E8.5 and E9.5 in the neural tube and tail bud. At E10.5, Frizzled10 is expressed in the forebrain vesicle, the fourth ventricle and the dorsal spinal cord. From E12.5 to E16.5, Frizzled10 expression is mainly observed in the cortical hem/fimbria, the neuroepithelium of the third ventricular zone, midbrain, developing cerebellum, and dorsal spinal cord. At P0, with the exception of expression in the fimbria, Frizzled10 mRNA expression is limited to specific nuclei including the ventral posterior thalamic nucleus (VP) and the dorsal lateral geniculate nucleus (DLG) in the developing thalamus as well as in the proliferative ventricular zone of the developing cerebellum. From P20 to adult, Frizzled10 mRNA is detected only in the internal capsule (ic). Our data show that expression of Frizzled10 is very strong during embryonic development of the CNS and suggest that Frizzled10 may play an essential role in spatial and temporal regulation during neural development.
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Affiliation(s)
- Yan Yan
- Key Laboratory of Developmental Genes and Human Diseases, MOE, School of Medicine, Southeast University, 87 Dingjiaoqiao Road, Nanjing, Jiangsu, 210009, PR China
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Verkade H, Heath JK. Wnt signaling mediates diverse developmental processes in zebrafish. Methods Mol Biol 2008; 469:225-51. [PMID: 19109714 DOI: 10.1007/978-1-60327-469-2_17] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A combination of forward and reverse genetic approaches in zebrafish has revealed novel roles for canonical Wnt and Wnt/PCP signaling during vertebrate development. Forward genetics in zebrafish provides an exceptionally powerful tool to assign roles in vertebrate developmental processes to novel genes, as well as elucidating novel roles played by known genes. This has indeed turned out to be the case for components of the canonical Wnt signaling pathway. Non-canonical Wnt signaling in the zebrafish is also currently a topic of great interest, due to the identified roles of this pathway in processes requiring the integration of cell polarity and cell movement, such as the directed migration movements that drive the narrowing and lengthening (convergence and extension) of the embryo during early development.
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Affiliation(s)
- Heather Verkade
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
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Dijkstra JM, Katagiri T, Hosomichi K, Yanagiya K, Inoko H, Ototake M, Aoki T, Hashimoto K, Shiina T. A third broad lineage of major histocompatibility complex (MHC) class I in teleost fish; MHC class II linkage and processed genes. Immunogenetics 2007; 59:305-21. [PMID: 17318646 DOI: 10.1007/s00251-007-0198-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2006] [Accepted: 01/09/2007] [Indexed: 10/23/2022]
Abstract
Most of the previously studied teleost MHC class I molecules can be classified into two broad lineages: "U" and "Z/ZE." However, database reports on genes in cyprinid and salmonid fishes show that there is a third major lineage, which lacks detailed analysis so far. We designated this lineage "L" because of an intriguing linkage characteristic. Namely, one zebrafish L locus is closely linked with MHC class II loci, despite the extensively documented nonlinkage of teleost class I with class II. The L lineage consists of highly variable, nonclassical MHC class I genes, and has no apparent orthologues outside teleost fishes. Characteristics that distinguish the L lineage from most other MHC class I are (1) absence of two otherwise highly conserved tryptophan residues W51 and W60 in the alpha1 domain, (2) a low GC content of the alpha1 and alpha2 exons, and (3) an HINLTL motif including a possible glycosylation site in the alpha3 domain. In rainbow trout (Oncorhynchus mykiss) we analyzed several intact L genes in detail, including their genomic organization and transcription pattern. The gene Onmy-LAA is quite different from the genes Onmy-LBA, Onmy-LCA, Onmy-LDA, and Onmy-LEA, while the latter four are similar and categorized as "Onmy-LBA-like." Whereas the Onmy-LAA gene is organized like a canonical MHC class I gene, the Onmy-LBA-like genes are processed and lack all introns except intron 1. Onmy-LAA is predominantly expressed in the intestine, while the Onmy-LBA-like transcripts display a rather homogeneous tissue distribution. To our knowledge, this is the first description of an MHC class I lineage with multiple copies of processed genes, which are intact and transcribed. The present study significantly improves the knowledge of MHC class I variation in teleosts.
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Ramel MC, Buckles GR, Lekven AC. Conservation of structure and functional divergence of duplicated Wnt8s in pufferfish. Dev Dyn 2004; 231:441-8. [PMID: 15366022 DOI: 10.1002/dvdy.20141] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The zebrafish wnt8 locus differs from its tetrapod counterparts in that it produces two functionally overlapping but distinct Wnt8 proteins. Studies of zebrafish wnt8 have suggested that the two major Wnt8 proteins produced are functionally similar yet may behave differently depending on the assay context. To determine whether the bicistronic wnt8 and its accompanying unique protein activities found in zebrafish are more widespread (and perhaps universal) among teleosts, we have extended our studies to the pufferfish Takifugu rubripes. We have found that Takifugu wnt8 is also bicistronic, indicating that the wnt8 duplication occurred before the divergence of these teleosts approximately 150 million years ago. Furthermore, overexpression assays in zebrafish embryos show that functional differences between the zebrafish Wnt8.1 and Wnt8.2 proteins are conserved in their Takifugu orthologs. Thus, despite the fact that Wnt8.1 and Wnt8.2 proteins are as similar to each other as each is to Xenopus Xwnt-8, Wnt8 family members can behave quite differently in the context of zebrafish embryos. This finding suggests that zebrafish (and possibly teleost in general) Wnt8 receptors are able to discriminate between highly related ligands.
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Affiliation(s)
- Marie-Christine Ramel
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, Texas 77843-3258, USA
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Yanfeng W, Saint-Jeannet JP, Klein PS. Wnt-frizzled signaling in the induction and differentiation of the neural crest. Bioessays 2003; 25:317-25. [PMID: 12655639 DOI: 10.1002/bies.10255] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The neural crest is a transient population of multipotent progenitors arising at the lateral edge of the neural plate in vertebrate embryos. After delamination and migration from the neuroepithelium, these cells contribute to a diverse array of tissues including neurons, smooth muscle, craniofacial cartilage, bone cells, endocrine cells and pigment cells. Considerable progress in recent years has furthered our understanding at a molecular level of how this important group of cells is generated and how they are assigned to specific lineages. Here we review a number of recent studies supporting a role for Wnt signaling in neural crest induction, differentiation, and apoptosis. We also summarize the timing of expression of a number of Wnt ligands and receptors with respect to neural crest induction.
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Affiliation(s)
- Wang Yanfeng
- Cell and Molecular Biology Graduate Group, Department of Medicine and Howard Hughes Medical Institute, University of Pennsylvania, Philadelphia, PA 19104, USA
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El-Messaoudi S, Renucci A. Expression pattern of the frizzled 7 gene during zebrafish embryonic development. Mech Dev 2001; 102:231-4. [PMID: 11287199 DOI: 10.1016/s0925-4773(01)00291-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We have identified a novel frizzled gene in zebrafish, (Danio rerio): frizzled 7, highly related to mouse, chick and Xenopus fz7. No maternal expression was detected. Zygotic transcription starts at the end of gastrulation anteriorly in the presumptive neurectoderm and in the presomitic mesoderm. During somitogenesis expression is detected in developing central nervous system, including forebrain, midbrain, hindbrain and spinal cord, the lateral mesoderm and the anterior part of the forming somites. The strong sequence conservation of fz7 to the mouse, chick and Xenopus counterparts is also true for their expression pattern.
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Affiliation(s)
- S El-Messaoudi
- Institut de Génétique Humaine, 141 rue de la Cardonille, 34033, Montpellier, France
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