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Katagade V, Kandroo M, Ratnaparkhi A. Embryonic spatiotemporal expression pattern of Folded gastrulation suggests roles in multiple morphogenetic events and regulation by AbdA. G3 (Bethesda) 2024; 14:jkae032. [PMID: 38366558 DOI: 10.1093/g3journal/jkae032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 10/03/2023] [Accepted: 01/31/2024] [Indexed: 02/18/2024]
Abstract
In Drosophila, the signaling pathway activated by the ligand Folded gastrulation (Fog) is among the few known G protein-coupled receptor (GPCR) pathways to regulate cell shape change with a well-characterized role in gastrulation. However, an understanding of the spectrum of morphogenetic events regulated by Fog signaling is still lacking. Here, we present an analysis of the expression pattern and regulation of fog using a genome-engineered Fog::sfGFP line. We show that Fog expression is widespread and in tissues previously not associated with the signaling pathway including germ cells, trachea, and amnioserosa. In the central nervous system (CNS), we find that the ligand is expressed in multiple types of glia indicating a prominent role in the development of these cells. Consistent with this, we have identified 3 intronic enhancers whose expression in the CNS overlaps with Fog::sfGFP. Further, we show that enhancer-1, (fogintenh-1) located proximal to the coding exon is responsive to AbdA. Supporting this, we find that fog expression is downregulated in abdA mutants. Together, our study highlights the broad scope of Fog-GPCR signaling during embryogenesis and identifies Hox gene AbdA as a novel regulator of fog expression.
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Affiliation(s)
- Vrushali Katagade
- MACS-Agharkar Research Institute (Affiliated to Savitribai Phule Pune University), Developmental Biology Group, G.G. Agarkar Road, Pune 411 004, Maharashtra, India
| | - Manisha Kandroo
- MACS-Agharkar Research Institute (Affiliated to Savitribai Phule Pune University), Developmental Biology Group, G.G. Agarkar Road, Pune 411 004, Maharashtra, India
| | - Anuradha Ratnaparkhi
- MACS-Agharkar Research Institute (Affiliated to Savitribai Phule Pune University), Developmental Biology Group, G.G. Agarkar Road, Pune 411 004, Maharashtra, India
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2
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Thomson E, Dawson R, H’ng CH, Adikusuma F, Piltz S, Thomas PQ. The Nestin neural enhancer is essential for normal levels of endogenous Nestin in neuroprogenitors but is not required for embryo development. PLoS One 2021; 16:e0258538. [PMID: 34739481 PMCID: PMC8570527 DOI: 10.1371/journal.pone.0258538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 09/29/2021] [Indexed: 11/23/2022] Open
Abstract
Enhancers are vitally important during embryonic development to control the spatial and temporal expression of genes. Recently, large scale genome projects have identified a vast number of putative developmental regulatory elements. However, the proportion of these that have been functionally assessed is relatively low. While enhancers have traditionally been studied using reporter assays, this approach does not characterise their contribution to endogenous gene expression. We have studied the murine Nestin (Nes) intron 2 enhancer, which is widely used to direct exogenous gene expression within neural progenitor cells in cultured cells and in vivo. We generated CRISPR deletions of the enhancer region in mice and assessed their impact on Nes expression during embryonic development. Loss of the Nes neural enhancer significantly reduced Nes expression in the developing CNS by as much as 82%. By assessing NES protein localization, we also show that this enhancer region contains repressor element(s) that inhibit Nes expression within the vasculature. Previous reports have stated that Nes is an essential gene, and its loss causes embryonic lethality. We also generated 2 independent Nes null lines and show that both develop without any obvious phenotypic effects. Finally, through crossing of null and enhancer deletion mice we provide evidence of trans-chromosomal interaction of the Nes enhancer and promoter.
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Affiliation(s)
- Ella Thomson
- School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
| | - Ruby Dawson
- School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
| | - Chee Ho H’ng
- School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
| | - Fatwa Adikusuma
- School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
- School of Biomedicine, University of Adelaide, Adelaide, SA, Australia
- South Australian Genome Editing Facility, South Australian Health & Medical Research Institute, Adelaide, SA, Australia
| | - Sandra Piltz
- School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
- South Australian Genome Editing Facility, South Australian Health & Medical Research Institute, Adelaide, SA, Australia
| | - Paul Q. Thomas
- School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
- School of Biomedicine, University of Adelaide, Adelaide, SA, Australia
- South Australian Genome Editing Facility, South Australian Health & Medical Research Institute, Adelaide, SA, Australia
- Genome Editing Program, South Australian Health & Medical Research Institute, Adelaide, SA, Australia
- * E-mail:
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3
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Paladini D, Malinger G, Birnbaum R, Monteagudo A, Pilu G, Salomon LJ, Timor-Tritsch IE. ISUOG Practice Guidelines (updated): sonographic examination of the fetal central nervous system. Part 2: performance of targeted neurosonography. Ultrasound Obstet Gynecol 2021; 57:661-671. [PMID: 33734522 DOI: 10.1002/uog.23616] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Affiliation(s)
- D Paladini
- Fetal Medicine and Surgery Unit, Istituto G. Gaslini, Genoa, Italy
| | - G Malinger
- Division of Ultrasound in Obstetrics and Gynecology, Lis Maternity Hospital, Tel Aviv Sourasky Medical Centre, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - R Birnbaum
- Division of Ultrasound in Obstetrics and Gynecology, Lis Maternity Hospital, Tel Aviv Sourasky Medical Centre, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - A Monteagudo
- Carnegie Imaging for Women, Obstetrics, Gynecology and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - G Pilu
- Obstetric Unit, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - L J Salomon
- Hôpital Necker Enfants Malades, AP-HP, and LUMIERE platform, EA 7328 Université de Paris, Paris, France
| | - I E Timor-Tritsch
- Division of Obstetrical and Gynecological Ultrasound, NYU School of Medicine, New York, NY, USA
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Abstract
Kinesins are microtubule-based motor proteins that are well known for their key roles in cell biological processes ranging from cell division, to intracellular transport of mRNAs, proteins, vesicles, and organelles, and microtubule disassembly. Interestingly, many of the ~45 distinct kinesin genes in vertebrate genomes have also been associated with specific phenotypes in embryonic development. In this review, we highlight the specific developmental roles of kinesins, link these to cellular roles reported in vitro, and highlight remaining gaps in our understanding of how this large and important family of proteins contributes to the development and morphogenesis of animals.
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Affiliation(s)
- Mia J Konjikusic
- Department of Molecular Biosciences, USA; Department of Nutritional Sciences, University of Texas at Austin, USA
| | - Ryan S Gray
- Department of Nutritional Sciences, University of Texas at Austin, USA.
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5
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Jacobs CT, Huang P. Complex crosstalk of Notch and Hedgehog signalling during the development of the central nervous system. Cell Mol Life Sci 2021; 78:635-644. [PMID: 32880661 PMCID: PMC11072263 DOI: 10.1007/s00018-020-03627-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/23/2020] [Accepted: 08/20/2020] [Indexed: 01/20/2023]
Abstract
The development of the vertebrate central nervous system (CNS) is tightly regulated by many highly conserved cell signalling pathways. These pathways ensure that differentiation and migration events occur in a specific and spatiotemporally restricted manner. Two of these pathways, Notch and Hedgehog (Hh) signalling, have been shown to form a complex web of interaction throughout different stages of CNS development. Strikingly, some processes employ Notch signalling to regulate Hh response, while others utilise Hh signalling to modulate Notch response. Notch signalling functions upstream of Hh response through controlling the trafficking of integral pathway components as well as through modulating protein levels and transcription of downstream transcriptional factors. In contrast, Hh signalling regulates Notch response by either indirectly controlling expression of key Notch ligands and regulatory proteins or directly through transcriptional control of canonical Notch target genes. Here, we review these interactions and demonstrate the level of interconnectivity between the pathways, highlighting context-dependent modes of crosstalk. Since many other developmental signalling pathways are active in these tissues, it is likely that the interplay between Notch and Hh signalling is not only an example of signalling crosstalk but also functions as a component of a wider, multi-pathway signalling network.
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Affiliation(s)
- Craig T Jacobs
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, Alberta Children's Hospital Research Institute, University of Calgary, 3330 Hospital Drive, Calgary, AB, T2N 4N1, Canada
| | - Peng Huang
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, Alberta Children's Hospital Research Institute, University of Calgary, 3330 Hospital Drive, Calgary, AB, T2N 4N1, Canada.
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6
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Malinger G, Paladini D, Haratz KK, Monteagudo A, Pilu GL, Timor-Tritsch IE. ISUOG Practice Guidelines (updated): sonographic examination of the fetal central nervous system. Part 1: performance of screening examination and indications for targeted neurosonography. Ultrasound Obstet Gynecol 2020; 56:476-484. [PMID: 32870591 DOI: 10.1002/uog.22145] [Citation(s) in RCA: 121] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Affiliation(s)
- G Malinger
- Division of Ultrasound in Obstetrics & Gynecology, Lis Maternity Hospital, Tel Aviv Sourasky Medical Center, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - D Paladini
- Fetal Medicine and Surgery Unit, Istituto G.Gaslini, Genoa, Italy
| | - K K Haratz
- Division of Ultrasound in Obstetrics & Gynecology, Lis Maternity Hospital, Tel Aviv Sourasky Medical Center, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - A Monteagudo
- Carnegie Imaging for Women, Obstetrics, Gynecology and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - G L Pilu
- Obstetric Unit, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - I E Timor-Tritsch
- Division of Obstetrical & Gynecological Ultrasound, NYU School of Medicine, New York, NY, USA
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Maierbrugger KT, Sousa-Nunes R, Bateman JM. The mTOR pathway component Unkempt regulates neural stem cell and neural progenitor cell cycle in the Drosophila central nervous system. Dev Biol 2020; 461:55-65. [PMID: 31978396 DOI: 10.1016/j.ydbio.2020.01.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 01/06/2020] [Accepted: 01/08/2020] [Indexed: 11/21/2022]
Abstract
The formation of a complex nervous system requires the coordinated action of progenitor cell proliferation, differentiation and maturation. The Drosophila postembryonic central nervous system provides a powerful model for dissecting the cellular and molecular mechanisms underpinning neurogenesis. We previously identified the conserved zinc finger/RING protein Unkempt (Unk) as a key temporal regulator of neuronal differentiation in the Drosophila developing eye and showed that Unk acts downstream of the mechanistic target of rapamycin (mTOR) pathway together with its binding partner Headcase (Hdc). Here we investigate the role of Unk in Drosophila postembryonic thoracic neurogenesis. The Drosophila central nervous system contains neural stem cells, called neuroblasts, and neural progenitors, known as ganglion mother cells (GMCs). Unk is highly expressed in the central brain and ventral nerve cord but is not required to maintain neuroblast numbers or for the regulation of temporal series factor expression in neuroblasts. However, loss of Unk increases the number of neuroblasts and GMCs in S-phase of the cell cycle, resulting in the overproduction of neurons. We also show that Unk interacts with Hdc through its zinc finger domain. The zinc finger domain is required for the synergistic activity of Unk with Hdc during eye development but is not necessary for the activity of Unk in thoracic neurogenesis. Overall, this study shows that Unk and Hdc are novel negative regulators of neurogenesis in Drosophila and indicates a conserved role of mTOR signalling in nervous system development.
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Affiliation(s)
- Katja T Maierbrugger
- Maurice Wohl Clinical Neuroscience Institute, King's College London, 125 Coldharbour lane, London, SE5 9NU, UK
| | - Rita Sousa-Nunes
- Centre for Developmental Neurobiology, King's College London, New Hunts House, Newcomen Street, London, SE1 1UL, UK
| | - Joseph M Bateman
- Maurice Wohl Clinical Neuroscience Institute, King's College London, 125 Coldharbour lane, London, SE5 9NU, UK.
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Abstract
During embryonic development, the central nervous system forms as the neural plate and then rolls into a tube in a complex morphogenetic process known as neurulation. Neural tube defects (NTDs) occur when neurulation fails and are among the most common structural birth defects in humans. The frequency of NTDs varies greatly anywhere from 0.5 to 10 in 1000 live births, depending on the genetic background of the population, as well as a variety of environmental factors. The prognosis varies depending on the size and placement of the lesion and ranges from death to severe or moderate disability, and some NTDs are asymptomatic. This chapter reviews how mouse models have contributed to the elucidation of the genetic, molecular, and cellular basis of neural tube closure, as well as to our understanding of the causes and prevention of this devastating birth defect.
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Affiliation(s)
- Irene E Zohn
- Center for Genetic Medicine, Children's Research Institute, Children's National Medical Center, Washington, DC, USA.
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9
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Abstract
The adult human central nervous system (CNS) has very limited regenerative capability, and injury at the cellular and molecular level cannot be studied in vivo. Modelling neural damage in human systems is crucial to identifying species-specific responses to injury and potentially neurotoxic compounds leading to development of more effective neuroprotective agents. Hence we developed human neural stem cell (hNSC) 3-dimensional (3D) cultures and tested their potential for modelling neural insults, including hypoxic-ischaemic and Ca2+-dependent injury. Standard 3D conditions for rodent cells support neuroblastoma lines used as human CNS models, but not hNSCs, but in all cases changes in culture architecture alter gene expression. Importantly, response to damage differs in 2D and 3D cultures and this is not due to reduced drug accessibility. Together, this study highlights the impact of culture cytoarchitecture on hNSC phenotype and damage response, indicating that 3D models may be better predictors of in vivo response to damage and compound toxicity.
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Affiliation(s)
- Barbora Vagaska
- Stem Cells and Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, University College London, London, WC1N 1EH, UK
| | - Olivia Gillham
- Stem Cells and Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, University College London, London, WC1N 1EH, UK
| | - Patrizia Ferretti
- Stem Cells and Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, University College London, London, WC1N 1EH, UK.
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10
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González-Orozco JC, Moral-Morales AD, Camacho-Arroyo I. Progesterone through Progesterone Receptor B Isoform Promotes Rodent Embryonic Oligodendrogenesis. Cells 2020; 9:cells9040960. [PMID: 32295179 PMCID: PMC7226962 DOI: 10.3390/cells9040960] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 03/28/2020] [Accepted: 03/28/2020] [Indexed: 12/14/2022] Open
Abstract
Oligodendrocytes are the myelinating cells of the central nervous system (CNS). These cells arise during the embryonic development by the specification of the neural stem cells to oligodendroglial progenitor cells (OPC); newly formed OPC proliferate, migrate, differentiate, and mature to myelinating oligodendrocytes in the perinatal period. It is known that progesterone promotes the proliferation and differentiation of OPC in early postnatal life through the activation of the intracellular progesterone receptor (PR). Progesterone supports nerve myelination after spinal cord injury in adults. However, the role of progesterone in embryonic OPC differentiation as well as the specific PR isoform involved in progesterone actions in these cells is unknown. By using primary cultures obtained from the embryonic mouse spinal cord, we showed that embryonic OPC expresses both PR-A and PR-B isoforms. We found that progesterone increases the proliferation, differentiation, and myelination potential of embryonic OPC through its PR by upregulating the expression of oligodendroglial genes such as neuron/glia antigen 2 (NG2), sex determining region Y-box9 (SOX9), myelin basic protein (MBP), 2′,3′-cyclic-nucleotide 3′-phosphodiesterase (CNP1), and NK6 homeobox 1 (NKX 6.1). These effects are likely mediated by PR-B, as they are blocked by the silencing of this isoform. The results suggest that progesterone contributes to the process of oligodendrogenesis during prenatal life through specific activation of PR-B.
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11
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Hong YG, Kang B, Lee S, Lee Y, Ju BG, Jeong S. Identification of cis -Regulatory Region Controlling Semaphorin-1a Expression in the Drosophila Embryonic Nervous System. Mol Cells 2020; 43:228-235. [PMID: 32024353 PMCID: PMC7103886 DOI: 10.14348/molcells.2019.0294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 11/27/2022] Open
Abstract
The Drosophila transmembrane semaphorin Sema-1a mediates forward and reverse signaling that plays an essential role in motor and central nervous system (CNS) axon pathfinding during embryonic neural development. Previous immunohistochemical analysis revealed that Sema-1a is expressed on most commissural and longitudinal axons in the CNS and five motor nerve branches in the peripheral nervous system (PNS). However, Sema-1a-mediated axon guidance function contributes significantly to both intersegmental nerve b (ISNb) and segmental nerve a (SNa), and slightly to ISNd and SNc, but not to ISN motor axon pathfinding. Here, we uncover three cis-regulatory elements (CREs), R34A03, R32H10, and R33F06, that robustly drove reporter expression in a large subset of neurons in the CNS. In the transgenic lines R34A03 and R32H10 reporter expression was consistently observed on both ISNb and SNa nerve branches, whereas in the line R33F06 reporter expression was irregularly detected on ISNb or SNa nerve branches in small subsets of abdominal hemisegments. Through complementation test with a Sema1a loss-of-function allele, we found that neuronal expression of Sema-1a driven by each of R34A03 and R32H10 restores robustly the CNS and PNS motor axon guidance defects observed in Sema-1a homozygous mutants. However, when wild-type Sema-1a is expressed by R33F06 in Sema-1a mutants, the Sema-1a PNS axon guidance phenotypes are partially rescued while the Sema-1a CNS axon guidance defects are completely rescued. These results suggest that in a redundant manner, the CREs, R34A03, R32H10, and R33F06 govern the Sema-1a expression required for the axon guidance function of Sema-1a during embryonic neural development.
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Affiliation(s)
- Young Gi Hong
- Division of Life Sciences (Molecular Biology Major), Jeonbuk National University, Jeonju 54896, Korea
| | - Bongsu Kang
- Division of Life Sciences (Molecular Biology Major), Jeonbuk National University, Jeonju 54896, Korea
- Department of Bioactive Material Sciences and Research Center of Bioactive Materials, Jeonbuk National University, Jeonju 54896, Korea
| | - Seongsoo Lee
- Gwangju Center, Korea Basic Science Institute, Gwangju 61186, Korea
| | - Youngseok Lee
- Department of Bio and Fermentation Convergence Technology, BK21 PLUS Project, Kookmin University, Seoul 02707, Korea
| | - Bong-Gun Ju
- Department of Life Science, Sogang University, Seoul 04107, Korea
| | - Sangyun Jeong
- Division of Life Sciences (Molecular Biology Major), Jeonbuk National University, Jeonju 54896, Korea
- Department of Bioactive Material Sciences and Research Center of Bioactive Materials, Jeonbuk National University, Jeonju 54896, Korea
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Qiu Y, Sun S, Yu X, Zhou J, Cai W, Qian L. Carboxyl ester lipase is highly conserved in utilizing maternal supplied lipids during early development of zebrafish and human. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158663. [PMID: 32061751 DOI: 10.1016/j.bbalip.2020.158663] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 01/13/2020] [Accepted: 02/10/2020] [Indexed: 01/05/2023]
Abstract
Carboxyl ester lipase (Cel), is a lipolytic enzyme secreted by the pancreas, which hydrolyzes various species of lipids in the gut. Cel is also secreted by mammary gland during lactation and exists in breast milk. It facilitates dietary fat digestion and absorption, thus contributing to normal infant development. This study aimed to examine whether the Cel in zebrafish embryos has a similar role of maternal lipid utilization as in human infants, and how Cel contributes to the utilization of yolk lipids in zebrafish. The cel1 and cel2 genes were expressed ubiquitously in the blastodisc and yolk syncytial layer before 24 hpf, and in the exocrine pancreas after 72 hpf. The cel1 and cel2 morphants exhibited developmental retardation and yolk sac retention. The total cholesterol, cholesterol ester, free cholesterol, and triglyceride were reduced in the morphants' body while accumulated in the yolk (except triglyceride). The FFA content of whole embryos was much lower in morphants than in standard controls. Moreover, the delayed development in cel (cel1/cel2) double morphants was partially rescued by FFA and cholesterol supplementation. Delayed and weakened cholesterol ester transport to the brain and eyes was observed in cel morphants. Correspondingly, shrunken midbrain tectum, microphthalmia, pigmentation-delayed eyes as well as down-regulated Shh target genes were observed in the CNS of double morphants. Interestingly, cholesterol injections reversed these CNS alterations. Our findings suggested that cel genes participate in the lipid releasing from yolk sac to developing body, thereby contributing to the normal growth rate and CNS development in zebrafish.
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Affiliation(s)
- Yaqi Qiu
- Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, 1665 Kongjiang Road, Shanghai 200092, China
| | - Shuna Sun
- Cardiovascular Center, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai 201102, China
| | - Xianxian Yu
- Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, 1665 Kongjiang Road, Shanghai 200092, China
| | - Jiefei Zhou
- Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, 1665 Kongjiang Road, Shanghai 200092, China
| | - Wei Cai
- Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, 1665 Kongjiang Road, Shanghai 200092, China.
| | - Linxi Qian
- Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, 1665 Kongjiang Road, Shanghai 200092, China.
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13
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Chen SH, Lu CH, Tsai MJ. TCTP is Essential for Cell Proliferation and Survival during CNS Development. Cells 2020; 9:cells9010133. [PMID: 31935927 PMCID: PMC7017002 DOI: 10.3390/cells9010133] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/31/2019] [Accepted: 01/02/2020] [Indexed: 02/07/2023] Open
Abstract
Translationally controlled tumor-associated protein (TCTP) has been implicated in cell growth, proliferation, and apoptosis through interacting proteins. Although TCTP is expressed abundantly in the mouse brain, little is known regarding its role in the neurogenesis of the nervous system. We used Nestin-cre-driven gene-mutated mice to investigate the function of TCTP in the nervous system. The mice carrying disrupted TCTP in neuronal and glial progenitor cells died at the perinatal stage. The NestinCre/+; TCTPf/f pups displayed reduced body size at postnatal day 0.5 (P0.5) and a lack of milk in the stomach compared with littermate controls. In addition to decreased cell proliferation, terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL) and caspase assay revealed that apoptosis was increased in newly committed TCTP-disrupted cells as they migrated away from the ventricular zone. The mechanism may be that the phenotype from specific deletion of TCTP in neural progenitor cells is correlated with the decreased expression of cyclins D2, E2, Mcl-1, Bcl-xL, hax-1, and Octamer-binding transcription factor 4 (Oct4) in conditional knockout mice. Our results demonstrate that TCTP is a critical protein for cell survival during early neuronal and glial differentiation. Thus, enhanced neuronal loss and functional defect in Tuj1 and doublecortin-positive neurons mediated through increased apoptosis and decreased proliferation during central nervous system (CNS) development may contribute to the perinatal death of TCTP mutant mice.
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Affiliation(s)
- Sung-Ho Chen
- Department of Pharmacology, College of Medicine, Tzu Chi University, Hualien 97004, Taiwan
- Master Program in Pharmacology and Toxicology, College of Medicine, Tzu Chi University, Hualien 97004, Taiwan;
- Correspondence: ; Tel.: +886-3-8565301 (ext. 2452); Fax: +886-3-8561465
| | - Chin-Hung Lu
- Master Program in Pharmacology and Toxicology, College of Medicine, Tzu Chi University, Hualien 97004, Taiwan;
| | - Ming-Jen Tsai
- Department of Emergency Medicine, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi City 600, Taiwan;
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14
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Schellino R, Boido M, Vercelli A. JNK Signaling Pathway Involvement in Spinal Cord Neuron Development and Death. Cells 2019; 8:cells8121576. [PMID: 31817379 PMCID: PMC6953032 DOI: 10.3390/cells8121576] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 12/14/2022] Open
Abstract
The c-Jun NH2-terminal protein kinase (JNK) is a Janus-faced kinase, which, in the nervous system, plays important roles in a broad range of physiological and pathological processes. Three genes, encoding for 10 JNK isoforms, have been identified: jnk1, jnk2, and jnk3. In the developing spinal cord, JNK proteins control neuronal polarity, axon growth/pathfinding, and programmed cell death; in adulthood they can drive degeneration and regeneration, after pathological insults. Indeed, recent studies have highlighted a role for JNK in motor neuron (MN) diseases, such as amyotrophic lateral sclerosis and spinal muscular atrophy. In this review we discuss how JNK-dependent signaling regulates apparently contradictory functions in the spinal cord, in both the developmental and adult stages. In addition, we examine the evidence that the specific targeting of JNK signaling pathway may represent a promising therapeutic strategy for the treatment of MN diseases.
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Affiliation(s)
- Roberta Schellino
- Department of Neuroscience Rita Levi Montalcini, University of Turin, 10126 Turin, Italy
- Neuroscience Institute Cavalieri Ottolenghi, University of Turin, 10043 Orbassano (TO), Italy
- Correspondence: ; Tel.: +39-011-670-6632
| | - Marina Boido
- Department of Neuroscience Rita Levi Montalcini, University of Turin, 10126 Turin, Italy
- Neuroscience Institute Cavalieri Ottolenghi, University of Turin, 10043 Orbassano (TO), Italy
- National Institute of Neuroscience (INN), 10125 Turin, Italy
| | - Alessandro Vercelli
- Department of Neuroscience Rita Levi Montalcini, University of Turin, 10126 Turin, Italy
- Neuroscience Institute Cavalieri Ottolenghi, University of Turin, 10043 Orbassano (TO), Italy
- National Institute of Neuroscience (INN), 10125 Turin, Italy
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15
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Abstract
The Drosophila embryonic central nervous system (CNS) is a complex organ consisting of ∼15,000 neurons and glia that is generated in ∼1 day of development. For the past 40 years, Drosophila developmental neuroscientists have described each step of CNS development in precise molecular genetic detail. This has led to an understanding of how an intricate nervous system emerges from a single cell. These studies have also provided important, new concepts in developmental biology, and provided an essential model for understanding similar processes in other organisms. In this article, the key genes that guide Drosophila CNS development and how they function is reviewed. Features of CNS development covered in this review are neurogenesis, gliogenesis, cell fate specification, and differentiation.
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Affiliation(s)
- Stephen T Crews
- Department of Biochemistry and Biophysics, Integrative Program for Biological and Genome Sciences, School of Medicine, The University of North Carolina at Chapel Hill, North Carolina 27599
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16
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Watanabe M, Zhang J, Mansuri MS, Duan J, Karimy JK, Delpire E, Alper SL, Lifton RP, Fukuda A, Kahle KT. Developmentally regulated KCC2 phosphorylation is essential for dynamic GABA-mediated inhibition and survival. Sci Signal 2019; 12:eaaw9315. [PMID: 31615901 PMCID: PMC7219477 DOI: 10.1126/scisignal.aaw9315] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Despite its importance for γ-aminobutyric acid (GABA) inhibition and involvement in neurodevelopmental disease, the regulatory mechanisms of the K+/Cl- cotransporter KCC2 (encoded by SLC12A5) during maturation of the central nervous system (CNS) are not entirely understood. Here, we applied quantitative phosphoproteomics to systematically map sites of KCC2 phosphorylation during CNS development in the mouse. KCC2 phosphorylation at Thr906 and Thr1007, which inhibits KCC2 activity, underwent dephosphorylation in parallel with the GABA excitatory-inhibitory sequence in vivo. Knockin mice expressing the homozygous phosphomimetic KCC2 mutations T906E/T1007E (Kcc2E/E ), which prevented the normal developmentally regulated dephosphorylation of these sites, exhibited early postnatal death from respiratory arrest and a marked absence of cervical spinal neuron respiratory discharges. Kcc2E/E mice also displayed disrupted lumbar spinal neuron locomotor rhythmogenesis and touch-evoked status epilepticus associated with markedly impaired KCC2-dependent Cl- extrusion. These data identify a previously unknown phosphorylation-dependent KCC2 regulatory mechanism during CNS development that is essential for dynamic GABA-mediated inhibition and survival.
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Affiliation(s)
- Miho Watanabe
- Department of Neurophysiology, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka 431-3192, Japan
| | - Jinwei Zhang
- Institute of Biomedical and Clinical Sciences, Medical School, College of Medicine and Health, University of Exeter, Hatherly Laboratories, Exeter EX4 4PS, UK
| | - M Shahid Mansuri
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT 06510, USA
| | - Jingjing Duan
- Human Aging Research Institute, School of Life Sciences, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Jason K Karimy
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT 06510, USA
| | - Eric Delpire
- Department of Anesthesiology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Seth L Alper
- Division of Nephrology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA
- The Broad Institute of Harvard and the Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Richard P Lifton
- Laboratory of Human Genetics and Genomics, The Rockefeller University, New York, NY, USA
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06511, USA
| | - Atsuo Fukuda
- Department of Neurophysiology, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka 431-3192, Japan.
- Advanced Research Facilities and Services, Preeminent Medical Photonics Education and Research Center, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka 431-3192, Japan
| | - Kristopher T Kahle
- Departments of Neurosurgery, Pediatrics, and Cellular and Molecular Physiology, Centers for Mendelian Genomics, Yale School of Medicine, New Haven, CT 06510, USA.
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17
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Dall'Asta A, Paramasivam G, Basheer SN, Whitby E, Tahir Z, Lees C. How to obtain diagnostic planes of the fetal central nervous system using three-dimensional ultrasound and a context-preserving rendering technology. Am J Obstet Gynecol 2019; 220:215-229. [PMID: 30447211 DOI: 10.1016/j.ajog.2018.11.1088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 11/05/2018] [Accepted: 11/08/2018] [Indexed: 12/26/2022]
Abstract
The antenatal evaluation of the fetal central nervous system (CNS) is among the most difficult tasks of prenatal ultrasound (US), requiring technical skills in relation to ultrasound and image acquisition as well as knowledge of CNS anatomy and how this changes with gestation. According to the International Guidelines for fetal neurosonology, the basic assessment of fetal CNS is most frequently performed on the axial planes, whereas the coronal and sagittal planes are required for the multiplanar evaluation of the CNS within the context of fetal neurosonology. It can be even more technically challenging to obtain "nonaxial" views with 2-dimensional (2D) US. The modality of 3-dimensional (3D) US has been suggested as a panacea to overcome the technical difficulties of achieving nonaxial views. The lack of familiarity of most sonologists with the use of 3D US and its related processing techniques may preclude its use even where it could play an important role in complementing antenatal 2D US assessment. Furthermore, once a 3D volume has been acquired, proprietary software allows it to be processed in different ways, leading to multiple ways of displaying and analyzing the same anatomical imaging or plane. These are difficult to learn and time consuming in the absence of specific training. In this article, we describe the key steps for volume acquisition of a 3D US volume, manipulation, and processing with reference to images of the fetal CNS, using a newly developed context-preserving rendering technique.
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Affiliation(s)
- Andrea Dall'Asta
- Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, Imperial College Healthcare NHS Trust, London, UK; Department of Surgery and Cancer, Imperial College London, UK; Department of Medicine and Surgery, Obstetrics and Gynecology Unit, University of Parma, Italy
| | - Gowrishankar Paramasivam
- Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, Imperial College Healthcare NHS Trust, London, UK
| | - Sheikh Nigel Basheer
- Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, Imperial College Healthcare NHS Trust, London, UK; Department of Paediatrics and Neonatal Medicine, Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, UK
| | - Elspeth Whitby
- University of Sheffield and Sheffield Teaching Hospitals Foundation Trust, Jessop Wing, Sheffield, UK
| | - Zubair Tahir
- Department of Neurosurgery, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Christoph Lees
- Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, Imperial College Healthcare NHS Trust, London, UK; Department of Surgery and Cancer, Imperial College London, UK; Department of Development and Regeneration, KU Leuven, Belgium.
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18
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Minakova E, Warner BB. Maternal immune activation, central nervous system development and behavioral phenotypes. Birth Defects Res 2018; 110:1539-1550. [PMID: 30430765 DOI: 10.1002/bdr2.1416] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 10/11/2018] [Indexed: 12/17/2022]
Abstract
Maternal immune activation (MIA) refers to a maternal immune system triggered by infectious or infectious-like stimuli. A cascade of cytokines and immunologic alterations are transmitted to the fetus, resulting in adverse phenotypes most notably in the central nervous system. Epidemiologic studies implicate maternal infections in a variety of neuropsychiatric disorders, most commonly autism spectrum disorders and schizophrenia. In animal models, MIA causes neurochemical and anatomic changes in the brain that correspond to those found in humans with the disorders. As our understanding of the interactions between environment, genetics, and immune system grows, the role of alternative, noninfectious risk factors, such as prenatal stress, obesity, and the gut microbiome also becomes clearer. This review considers how infectious and noninfectious etiologies activate the maternal immune system. Their impact on fetal programming and neuropsychiatric disorders in offspring is examined in the context of human and animal studies.
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Affiliation(s)
- Elena Minakova
- Department of Pediatrics, School of Medicine, Washington University in St Louis, Saint Louis, Missouri
| | - Barbara B Warner
- Department of Pediatrics, School of Medicine, Washington University in St Louis, Saint Louis, Missouri
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19
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Abstract
Glia constitute roughly half of the cells of the central nervous system (CNS) but were long-considered to be static bystanders to its formation and function. Here we provide an overview of how the diverse and dynamic functions of glial cells orchestrate essentially all aspects of nervous system formation and function. Radial glia, astrocytes, oligodendrocyte progenitor cells, oligodendrocytes, and microglia each influence nervous system development, from neuronal birth, migration, axon specification, and growth through circuit assembly and synaptogenesis. As neural circuits mature, distinct glia fulfill key roles in synaptic communication, plasticity, homeostasis, and network-level activity through dynamic monitoring and alteration of CNS structure and function. Continued elucidation of glial cell biology, and the dynamic interactions of neurons and glia, will enrich our understanding of nervous system formation, health, and function.
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Affiliation(s)
- Nicola J Allen
- Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.
| | - David A Lyons
- Centre for Discovery Brain Sciences, University of Edinburgh, 49 Little France Crescent, Edinburgh EH16 4SB, UK.
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20
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Abstract
PURPOSE OF REVIEW This article provides an overview of the most common nervous system malformations and serves as a reference for the latest advances in diagnosis and treatment. RECENT FINDINGS Major advances have occurred in recognizing the genetic basis of nervous system malformations. Environmental causes of nervous system malformations, such as perinatal infections including Zika virus, are also reviewed. Treatment for nervous system malformations begins prior to birth with prevention. Folic acid supplementation reduces the risk of neural tube defects and is an important part of health maintenance for pregnant women. Fetal surgery is now available for prenatal repair of myelomeningocele and has been demonstrated to improve outcomes. SUMMARY Each type of nervous system malformation is relatively uncommon, but, collectively, they constitute a large population of neurologic patients. The diagnosis of nervous system malformations begins with radiographic characterization. Genetic studies, including chromosomal microarray, targeted gene sequencing, and next-generation sequencing, are increasingly important aspects of the assessment. A genetic diagnosis may identify an associated medical condition and is necessary for family planning. Treatment consists primarily of supportive therapies for developmental delays and epilepsy, but prenatal surgery for myelomeningocele offers a glimpse of future possibilities. Prognosis depends on multiple clinical factors, including the examination findings, imaging characteristics, and genetic results. Treatment is best conducted in a multidisciplinary setting with neurology, neurosurgery, developmental pediatrics, and genetics working together as a comprehensive team.
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21
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Weyn-Vanhentenryck SM, Feng H, Ustianenko D, Duffié R, Yan Q, Jacko M, Martinez JC, Goodwin M, Zhang X, Hengst U, Lomvardas S, Swanson MS, Zhang C. Precise temporal regulation of alternative splicing during neural development. Nat Commun 2018; 9:2189. [PMID: 29875359 PMCID: PMC5989265 DOI: 10.1038/s41467-018-04559-0] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 05/09/2018] [Indexed: 12/13/2022] Open
Abstract
Alternative splicing (AS) is one crucial step of gene expression that must be tightly regulated during neurodevelopment. However, the precise timing of developmental splicing switches and the underlying regulatory mechanisms are poorly understood. Here we systematically analyze the temporal regulation of AS in a large number of transcriptome profiles of developing mouse cortices, in vivo purified neuronal subtypes, and neurons differentiated in vitro. Our analysis reveals early-switch and late-switch exons in genes with distinct functions, and these switches accurately define neuronal maturation stages. Integrative modeling suggests that these switches are under direct and combinatorial regulation by distinct sets of neuronal RNA-binding proteins including Nova, Rbfox, Mbnl, and Ptbp. Surprisingly, various neuronal subtypes in the sensory systems lack Nova and/or Rbfox expression. These neurons retain the "immature" splicing program in early-switch exons, affecting numerous synaptic genes. These results provide new insights into the organization and regulation of the neurodevelopmental transcriptome.
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Affiliation(s)
- Sebastien M Weyn-Vanhentenryck
- Department of Systems Biology, Department of Biochemistry and Molecular Biophysics, Center for Motor Neuron Biology and Disease, Columbia University, New York, NY, 10032, USA
| | - Huijuan Feng
- Department of Systems Biology, Department of Biochemistry and Molecular Biophysics, Center for Motor Neuron Biology and Disease, Columbia University, New York, NY, 10032, USA
- Department of Automation, MOE Key Laboratory of Bioinformatics and Bioinformatics Division, TNLIST, Tsinghua University, Beijing, 100084, China
| | - Dmytro Ustianenko
- Department of Systems Biology, Department of Biochemistry and Molecular Biophysics, Center for Motor Neuron Biology and Disease, Columbia University, New York, NY, 10032, USA
| | - Rachel Duffié
- Department of Biochemistry and Molecular Biophysics, Mortimer B. Zuckerman Mind Brain and Behavior Institute, Columbia University, New York, NY, 10027, USA
| | - Qinghong Yan
- Department of Systems Biology, Department of Biochemistry and Molecular Biophysics, Center for Motor Neuron Biology and Disease, Columbia University, New York, NY, 10032, USA
- Department of Comparative Biology and Safety Sciences, Amgen Inc., Cambridge, MA, 02141, USA
| | - Martin Jacko
- Department of Systems Biology, Department of Biochemistry and Molecular Biophysics, Center for Motor Neuron Biology and Disease, Columbia University, New York, NY, 10032, USA
| | - Jose C Martinez
- Department of Pathology and Cell Biology, The Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY, 10032, USA
| | - Marianne Goodwin
- Department of Molecular Genetics and Microbiology, Center for NeuroGenetics and the Genetics Institute, University of Florida, College of Medicine, Gainesville, FL, 32610, USA
| | - Xuegong Zhang
- Department of Automation, MOE Key Laboratory of Bioinformatics and Bioinformatics Division, TNLIST, Tsinghua University, Beijing, 100084, China
| | - Ulrich Hengst
- Department of Pathology and Cell Biology, The Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY, 10032, USA
| | - Stavros Lomvardas
- Department of Biochemistry and Molecular Biophysics, Mortimer B. Zuckerman Mind Brain and Behavior Institute, Columbia University, New York, NY, 10027, USA
| | - Maurice S Swanson
- Department of Molecular Genetics and Microbiology, Center for NeuroGenetics and the Genetics Institute, University of Florida, College of Medicine, Gainesville, FL, 32610, USA
| | - Chaolin Zhang
- Department of Systems Biology, Department of Biochemistry and Molecular Biophysics, Center for Motor Neuron Biology and Disease, Columbia University, New York, NY, 10032, USA.
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22
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Kim J, Oh H, Ryu B, Kim U, Lee JM, Jung CR, Kim CY, Park JH. Triclosan affects axon formation in the neural development stages of zebrafish embryos (Danio rerio). Environ Pollut 2018; 236:304-312. [PMID: 29414352 DOI: 10.1016/j.envpol.2017.12.110] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 12/13/2017] [Accepted: 12/27/2017] [Indexed: 05/23/2023]
Abstract
Triclosan (TCS) is an organic compound with a wide range of antibiotic activity and has been widely used in items ranging from hygiene products to cosmetics; however, recent studies suggest that it has several adverse effects. In particular, TCS can be passed to both fetus and infants, and while some evidence suggests in vitro neurotoxicity, there are currently few studies concerning the mechanisms of TCS-induced developmental neurotoxicity. Therefore, this study aimed to clarify the effect of TCS on neural development using zebrafish models, by analyzing the morphological changes, the alterations observed in fluorescence using HuC-GFP and Olig2-dsRED transgenic zebrafish models, and neurodevelopmental gene expression. TCS exposure decreased the body length, head size, and eye size in a concentration-dependent manner in zebrafish embryos. It increased apoptosis in the central nervous system (CNS) and particularly affected the structure of the CNS, resulting in decreased synaptic density and shortened axon length. In addition, it significantly up-regulated the expression of genes related to axon extension and synapse formation such as α1-Tubulin and Gap43, while decreasing Gfap and Mbp related to axon guidance, myelination and maintenance. Collectively, these changes indicate that exposure to TCS during neurodevelopment, especially during axonogenesis, is toxic. This is the first study to demonstrate the toxicity of TCS during neurogenesis, and suggests a possible mechanism underlying the neurotoxic effects of TCS in developing vertebrates.
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Affiliation(s)
- Jin Kim
- Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Hanseul Oh
- Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Bokyeong Ryu
- Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Ukjin Kim
- Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Ji Min Lee
- Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Cho-Rok Jung
- Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - C-Yoon Kim
- Stem Cell Biology, School of Medicine, Konkuk University, Seoul, South Korea.
| | - Jae-Hak Park
- Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, South Korea.
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23
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Morford JJ, Wu S, Mauvais-Jarvis F. The impact of androgen actions in neurons on metabolic health and disease. Mol Cell Endocrinol 2018; 465:92-102. [PMID: 28882554 PMCID: PMC5835167 DOI: 10.1016/j.mce.2017.09.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 08/25/2017] [Accepted: 09/01/2017] [Indexed: 01/03/2023]
Abstract
The male hormone testosterone exerts different effects on glucose and energy homeostasis in males and females. Testosterone deficiency predisposes males to visceral obesity, insulin resistance and type 2 diabetes. However, testosterone excess predisposes females to similar metabolic dysfunction. Here, we review the effects of testosterone actions in the central nervous system on metabolic function in males and females. In particular, we highlight changes within the hypothalamus that control glucose and energy homeostasis. We distinguish the organizational effects of testosterone in the programming of neural circuitry during development from the activational effects of testosterone during adulthood. Finally, we explore potential sites where androgen might be acting to impact metabolism within the central nervous system.
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Affiliation(s)
- Jamie J Morford
- Department of Medicine, Section of Endocrinology and Metabolism, Tulane University Health Sciences Center, School of Medicine, New Orleans, LA, USA
| | - Sheng Wu
- Department of Pediatrics and Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Franck Mauvais-Jarvis
- Department of Medicine, Section of Endocrinology and Metabolism, Tulane University Health Sciences Center, School of Medicine, New Orleans, LA, USA.
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24
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Arbeille E, Bashaw GJ. Brain Tumor promotes axon growth across the midline through interactions with the microtubule stabilizing protein Apc2. PLoS Genet 2018; 14:e1007314. [PMID: 29617376 PMCID: PMC5902039 DOI: 10.1371/journal.pgen.1007314] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 04/16/2018] [Accepted: 03/19/2018] [Indexed: 11/20/2022] Open
Abstract
Commissural axons must cross the midline to establish reciprocal connections between the two sides of the body. This process is highly conserved between invertebrates and vertebrates and depends on guidance cues and their receptors to instruct axon trajectories. The DCC family receptor Frazzled (Fra) signals chemoattraction and promotes midline crossing in response to its ligand Netrin. However, in Netrin or fra mutants, the loss of crossing is incomplete, suggesting the existence of additional pathways. Here, we identify Brain Tumor (Brat), a tripartite motif protein, as a new regulator of midline crossing in the Drosophila CNS. Genetic analysis indicates that Brat acts independently of the Netrin/Fra pathway. In addition, we show that through its B-Box domains, Brat acts cell autonomously to regulate the expression and localization of Adenomatous polyposis coli-2 (Apc2), a key component of the Wnt canonical signaling pathway, to promote axon growth across the midline. Genetic evidence indicates that the role of Brat and Apc2 to promote axon growth across the midline is independent of Wnt and Beta-catenin-mediated transcriptional regulation. Instead, we propose that Brat promotes midline crossing through directing the localization or stability of Apc2 at the plus ends of microtubules in navigating commissural axons. These findings define a new mechanism in the coordination of axon growth and guidance at the midline. The establishment of neuronal connections that cross the midline of the animal is essential to generate neural circuits that coordinate the left and right sides of the body. Axons that cross the midline to form these connections are called commissural axons and the molecules and mechanisms that control midline axon crossing are remarkably conserved across animal evolution. In this study we have used a genetic screen in the fruit fly in an attempt to uncover additional players in this key developmental process, and have identified a novel role for the Brain Tumor (Brat) protein in promoting commissural axon growth across the midline. Unlike its previous described functions, in the context of midline axon guidance Brat cooperates with the microtubule stabilizing protein Apc2 to coordinate axon growth and guidance. Molecular and genetic analyses point to the conserved B box motifs of the Brat protein as key in promoting the association of Apc2 with the plus ends of microtubules. Brat is highly conserved and future studies will determine whether homologous genes play analogous roles in mammalian neural development.
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Affiliation(s)
- Elise Arbeille
- Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
| | - Greg J. Bashaw
- Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
- * E-mail:
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25
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Napiórkowska T, Kobak J. The allometry of the arcuate body in the postembryonic development of the giant house spider Eratigena atrica. Invert Neurosci 2018; 18:3. [PMID: 29525854 PMCID: PMC5845603 DOI: 10.1007/s10158-018-0208-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 02/23/2018] [Indexed: 11/23/2022]
Abstract
The brain of arachnids contains a special neuropil area called the arcuate body (AB), whose function has been widely discussed. Its growth and proportion in the brain volume during postembryogenesis have been investigated only in several spider species. Our allometric study is aimed at determining to what extent the development of the AB in Eratigena atrica, a spider with unique biology and behaviour, is similar to the development of this body in other species. We put forward a hypothesis of allometric growth of this body in relation to the volume of the central nervous system (CNS) and its neuropil as well as in relation to the volume of the brain and its neuropil. The analysis of paraffin embedded, H + E stained histological preparations confirmed our hypothesis. The AB developed more slowly than the CNS and the neuropil of both the brain and the CNS. In contrast, it exhibited positive allometry in relation to the volume of the brain. This body increased more than nine times within the postembryonic development. Its proportion in the brain volume varied; the lowest was recorded in larvae and nymphs I; then, it increased in nymphs VI and decreased to 2.93% in nymphs X. We conclude that in Eratigena atrica, the AB develops differently that in orb-weaver and wandering spiders. There is no universal model of the AB development, although in adult spiders, regardless of their behaviour, the proportion of this area in the brain volume is similar.
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Affiliation(s)
- Teresa Napiórkowska
- Department of Invertebrate Zoology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Lwowska 1, 87-100, Toruń, Poland.
| | - Jarosław Kobak
- Department of Invertebrate Zoology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Lwowska 1, 87-100, Toruń, Poland
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26
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Bettini LR, Graziola F, Fazio G, Grazioli P, Scagliotti V, Pasquini M, Cazzaniga G, Biondi A, Larizza L, Selicorni A, Gaston-Massuet C, Massa V. Rings and Bricks: Expression of Cohesin Components is Dynamic during Development and Adult Life. Int J Mol Sci 2018; 19:E438. [PMID: 29389897 PMCID: PMC5855660 DOI: 10.3390/ijms19020438] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 01/26/2018] [Accepted: 01/28/2018] [Indexed: 02/07/2023] Open
Abstract
Cohesin complex components exert fundamental roles in animal cells, both canonical in cell cycle and non-canonical in gene expression regulation. Germline mutations in genes coding for cohesins result in developmental disorders named cohesinopaties, of which Cornelia de Lange syndrome (CdLS) is the best-known entity. However, a basic description of mammalian expression pattern of cohesins in a physiologic condition is still needed. Hence, we report a detailed analysis of expression in murine and human tissues of cohesin genes defective in CdLS. Using both quantitative and qualitative methods in fetal and adult tissues, cohesin genes were found to be ubiquitously and differentially expressed in human tissues. In particular, abundant expression was observed in hematopoietic and central nervous system organs. Findings of the present study indicate tissues which should be particularly sensitive to mutations, germline and/or somatic, in cohesin genes. Hence, this expression analysis in physiological conditions may represent a first core reference for cohesinopathies.
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Affiliation(s)
- Laura Rachele Bettini
- Dipartimento di Scienze Della Salute, San Paolo Hospital Medical School, Università degli Studi di Milano, 20142 Milan, Italy.
- Clinica Pediatrica, Dipartimento di Medicina e Chirurgia, Università di Milano-Bicocca Ospedale San Gerardo/Fondazione MBBM, 20900 Monza, Italy.
| | - Federica Graziola
- Dipartimento di Scienze Della Salute, San Paolo Hospital Medical School, Università degli Studi di Milano, 20142 Milan, Italy.
- Centre for Endocrinology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK.
| | - Grazia Fazio
- Centro Ricerca M. Tettamanti, Clinica Pediatrica, Dipartimento di Medicina e Chirurgia, Università di Milano-Bicocca, Ospedale San Gerardo/Fondazione MBBM, 20900 Monza, Italy.
| | - Paolo Grazioli
- Dipartimento di Scienze Della Salute, San Paolo Hospital Medical School, Università degli Studi di Milano, 20142 Milan, Italy.
| | - Valeria Scagliotti
- Centre for Endocrinology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK.
| | - Mariavittoria Pasquini
- Dipartimento di Scienze Della Salute, San Paolo Hospital Medical School, Università degli Studi di Milano, 20142 Milan, Italy.
| | - Giovanni Cazzaniga
- Centro Ricerca M. Tettamanti, Clinica Pediatrica, Dipartimento di Medicina e Chirurgia, Università di Milano-Bicocca, Ospedale San Gerardo/Fondazione MBBM, 20900 Monza, Italy.
| | - Andrea Biondi
- Clinica Pediatrica, Dipartimento di Medicina e Chirurgia, Università di Milano-Bicocca Ospedale San Gerardo/Fondazione MBBM, 20900 Monza, Italy.
- Centro Ricerca M. Tettamanti, Clinica Pediatrica, Dipartimento di Medicina e Chirurgia, Università di Milano-Bicocca, Ospedale San Gerardo/Fondazione MBBM, 20900 Monza, Italy.
| | - Lidia Larizza
- Laboratory of Medical Cytogenetics and Molecular Genetics, IRCCS Istituto Auxologico Italiano, 20154 Milan, Italy.
| | | | - Carles Gaston-Massuet
- Centre for Endocrinology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK.
| | - Valentina Massa
- Dipartimento di Scienze Della Salute, San Paolo Hospital Medical School, Università degli Studi di Milano, 20142 Milan, Italy.
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Affiliation(s)
- Kim Dale
- School of Life Sciences, University of Dundee, United Kingdom
| | - Elisa Martí
- Instituto de Biología Molecular de Barcelona (IBMB-CSIC), Parc Científic de Barcelona, C/Baldiri i Reixac 20, Barcelona 08028, Spain.
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Stewart R, Lako M, Horrocks GM, Przyborski SA. Neural Development by Transplanted Human Embryonal Carcinoma Stem Cells Expressing Green Fluorescent Protein. Cell Transplant 2017; 14:339-51. [PMID: 16180653 DOI: 10.3727/000000005783982945] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
For many years, researchers have investigated the fate and potential of neuroectodermal cells during the development of the central nervous system. Although several key factors that regulate neural differentiation have been identified, much remains unknown about the molecular mechanisms that control the fate and specification of neural subtypes, especially in humans. Human embryonal carcinoma (EC) stem cells are valuable research tools for the study of neural development; however, existing in vitro experiments are limited to inducing the differentiation of EC cells into only a handful of cell types. In this study, we developed and characterized a novel EC cell line (termed TERA2.cl.SP12-GFP) that carries the reporter molecule, green fluorescent protein (GFP). We demonstrate that TERA2.cl.SP12-GFP stem cells and their differentiated neural derivatives constitutively express GFP in cells grown both in vitro and in vivo. Cellular differentiation does not appear to be affected by insertion of the transgene. We propose that TERA2.cl.SP12-GFP cells provide a valuable research tool to track the fate of cells subsequent to transplantation into alternative environments and that this approach may be particularly useful to investigate the differentiation of human neural tissues in response to local environmental signals.
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Affiliation(s)
- R Stewart
- School of Biological and Biomedical Science, University of Durham, South Road, Durham DH1 3LE, UK.
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29
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Abstract
COUP-TFI and -TFII are members of the steroid/thyroid nuclear receptor superfamily. Recent clinical studies reveal that COUP-TFI gene mutations are associated with Bosch-Boonstra-Schaaf optic atrophy syndrome displaying symptoms of optic atrophy, intellectual disability, hypotonia, seizure, autism spectrum disorders, oromotor dysfunction, thin corpus callosum, or hearing defects, and COUP-TFII gene mutations lead to congenital heart defects and/or congenital diaphragmatic hernia with developmental delay and mental defects. In this review, we first describe the functions of COUP-TF genes in the morphogenesis of mouse forebrain including cerebral cortex, hippocampus, amygdala complex, hypothalamus, and cortical interneuron. Then, we address their roles in the development of cerebellum, glial cells, neural crest cells, and adult neuronal stem cells. Clearly, the investigations on the functions of COUP-TF genes in the developing mouse central nervous system will benefit not only the understanding of neurodevelopment, but also the etiology of human mental diseases.
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Affiliation(s)
- Xiong Yang
- Institute of Life Science, Nanchang University, Nanchang, Jiangxi, China
| | - Su Feng
- Institute of Life Science, Nanchang University, Nanchang, Jiangxi, China
| | - Ke Tang
- Institute of Life Science, Nanchang University, Nanchang, Jiangxi, China.
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30
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Abstract
To elucidate a gene function, in vivo analysis is indispensable. We can carry out gain and loss of function experiment of a gene of interest by electroporation in ovo and ex ovo culture system on early-stage and advanced-stage chick embryos, respectively. In this section, we introduce in/ex ovo electroporation methods for the development of the chick central nervous system and visual system investigation.
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Affiliation(s)
- Hidekiyo Harada
- Genetics and Development Division, Krembil Research Institute, University of Toronto, 60 Leonard St., Toronto, ON, Canada.
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
| | - Minoru Omi
- Department of Anatomy I, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Harukazu Nakamura
- Frontier Research Institute for Interdisciplinary Science (FRIS), Tohoku University, Aoba-ku, Sendai, Japan
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Sato K, Momose-Sato Y. Functiogenesis of the embryonic central nervous system revealed by optical recording with a voltage-sensitive dye. J Physiol Sci 2017; 67:107-119. [PMID: 27623687 PMCID: PMC10717437 DOI: 10.1007/s12576-016-0482-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 08/28/2016] [Indexed: 10/21/2022]
Abstract
Clarification of the functiogenesis of the embryonic central nervous system (CNS) has long been problematic, because conventional electrophysiological techniques have several limitations. First, early embryonic neurons are small and fragile, and the application of microelectrodes is challenging. Second, the simultaneous monitoring of electrical activity from multiple sites is limited, and as a consequence, spatiotemporal response patterns of neural networks cannot be assessed. We have applied multiple-site optical recording with a voltage-sensitive dye to the embryonic CNS and paved a new way to analyze the functiogenesis of the CNS. In this review, we discuss key points of optical recording in the embryonic CNS and introduce recent progress in optical investigations on the embryonic CNS with special emphasis on the development of the chick olfactory system. The studies clearly demonstrate the usefulness of voltage-sensitive dye recording as a powerful tool for elucidating the functional organization of the vertebrate embryonic CNS.
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Affiliation(s)
- Katsushige Sato
- Department of Health and Nutrition Sciences, Komazawa Women's University Faculty of Human Health, 238 Sakahama, Inagi-shi, Tokyo, 206-8511, Japan.
| | - Yoko Momose-Sato
- Department of Nutrition and Dietetics, College of Nutrition, Kanto Gakuin University, Yokohama, 236-8501, Japan
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32
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Brasil P, Pereira JP, Moreira ME, Ribeiro Nogueira RM, Damasceno L, Wakimoto M, Rabello RS, Valderramos SG, Halai UA, Salles TS, Zin AA, Horovitz D, Daltro P, Boechat M, Raja Gabaglia C, Carvalho de Sequeira P, Pilotto JH, Medialdea-Carrera R, Cotrim da Cunha D, Abreu de Carvalho LM, Pone M, Machado Siqueira A, Calvet GA, Rodrigues Baião AE, Neves ES, Nassar de Carvalho PR, Hasue RH, Marschik PB, Einspieler C, Janzen C, Cherry JD, Bispo de Filippis AM, Nielsen-Saines K. Zika Virus Infection in Pregnant Women in Rio de Janeiro. N Engl J Med 2016; 375:2321-2334. [PMID: 26943629 PMCID: PMC5323261 DOI: 10.1056/nejmoa1602412] [Citation(s) in RCA: 1369] [Impact Index Per Article: 171.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Zika virus (ZIKV) has been linked to central nervous system malformations in fetuses. To characterize the spectrum of ZIKV disease in pregnant women and infants, we followed patients in Rio de Janeiro to describe clinical manifestations in mothers and repercussions of acute ZIKV infection in infants. METHODS We enrolled pregnant women in whom a rash had developed within the previous 5 days and tested blood and urine specimens for ZIKV by reverse-transcriptase-polymerase-chain-reaction assays. We followed women prospectively to obtain data on pregnancy and infant outcomes. RESULTS A total of 345 women were enrolled from September 2015 through May 2016; of these, 182 women (53%) tested positive for ZIKV in blood, urine, or both. The timing of acute ZIKV infection ranged from 6 to 39 weeks of gestation. Predominant maternal clinical features included a pruritic descending macular or maculopapular rash, arthralgias, conjunctival injection, and headache; 27% had fever (short-term and low-grade). By July 2016, a total of 134 ZIKV-affected pregnancies and 73 ZIKV-unaffected pregnancies had reached completion, with outcomes known for 125 ZIKV-affected and 61 ZIKV-unaffected pregnancies. Infection with chikungunya virus was identified in 42% of women without ZIKV infection versus 3% of women with ZIKV infection (P<0.001). Rates of fetal death were 7% in both groups; overall adverse outcomes were 46% among offspring of ZIKV-positive women versus 11.5% among offspring of ZIKV-negative women (P<0.001). Among 117 live infants born to 116 ZIKV-positive women, 42% were found to have grossly abnormal clinical or brain imaging findings or both, including 4 infants with microcephaly. Adverse outcomes were noted regardless of the trimester during which the women were infected with ZIKV (55% of pregnancies had adverse outcomes after maternal infection in the first trimester, 52% after infection in the second trimester, and 29% after infection in the third trimester). CONCLUSIONS Despite mild clinical symptoms in the mother, ZIKV infection during pregnancy is deleterious to the fetus and is associated with fetal death, fetal growth restriction, and a spectrum of central nervous system abnormalities. (Funded by Ministério da Saúde do Brasil and others.).
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Affiliation(s)
- Patrícia Brasil
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - José P Pereira
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - M Elisabeth Moreira
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Rita M Ribeiro Nogueira
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Luana Damasceno
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Mayumi Wakimoto
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Renata S Rabello
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Stephanie G Valderramos
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Umme-Aiman Halai
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Tania S Salles
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Andrea A Zin
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Dafne Horovitz
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Pedro Daltro
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Marcia Boechat
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Claudia Raja Gabaglia
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Patrícia Carvalho de Sequeira
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - José H Pilotto
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Raquel Medialdea-Carrera
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Denise Cotrim da Cunha
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Liege M Abreu de Carvalho
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Marcos Pone
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - André Machado Siqueira
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Guilherme A Calvet
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Ana E Rodrigues Baião
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Elizabeth S Neves
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Paulo R Nassar de Carvalho
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Renata H Hasue
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Peter B Marschik
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Christa Einspieler
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Carla Janzen
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - James D Cherry
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Ana M Bispo de Filippis
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
| | - Karin Nielsen-Saines
- From Fundação Oswaldo Cruz (P.B., J.P.P., M.E.M., R.M.R.N., L.D., M.W., R.S.R., T.S.S, A.A.Z., D.H., M.B., P.C.S., J.H.P., R.M.-C., D.C.C., L.M.A.C., M.P., A.M.S., G.A.C., A.E.R.B., E.S.N., P.R.N.C., A.M.B.F.); and Clinica de Diagnostico por Imagem (P.D.) - both in Rio de Janeiro; David Geffen UCLA School of Medicine, Los Angeles (S.G.V., U.-A.H., C.J., J.D.C., K.N.-S.), and Biomedical Research Institute of Southern California, Oceanside (C.R.G.) - both in California; Faculty of Medicine, University of São Paulo, São Paulo (R.H.H.); Medical University of Graz, Graz, Austria (P.B.M., C.E.), and Karolinska Institutet, Stockholm (P.B.M.)
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Bivik C, MacDonald RB, Gunnar E, Mazouni K, Schweisguth F, Thor S. Control of Neural Daughter Cell Proliferation by Multi-level Notch/Su(H)/E(spl)-HLH Signaling. PLoS Genet 2016; 12:e1005984. [PMID: 27070787 PMCID: PMC4829154 DOI: 10.1371/journal.pgen.1005984] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Accepted: 03/17/2016] [Indexed: 11/18/2022] Open
Abstract
The Notch pathway controls proliferation during development and in adulthood, and is frequently affected in many disorders. However, the genetic sensitivity and multi-layered transcriptional properties of the Notch pathway has made its molecular decoding challenging. Here, we address the complexity of Notch signaling with respect to proliferation, using the developing Drosophila CNS as model. We find that a Notch/Su(H)/E(spl)-HLH cascade specifically controls daughter, but not progenitor proliferation. Additionally, we find that different E(spl)-HLH genes are required in different neuroblast lineages. The Notch/Su(H)/E(spl)-HLH cascade alters daughter proliferation by regulating four key cell cycle factors: Cyclin E, String/Cdc25, E2f and Dacapo (mammalian p21CIP1/p27KIP1/p57Kip2). ChIP and DamID analysis of Su(H) and E(spl)-HLH indicates direct transcriptional regulation of the cell cycle genes, and of the Notch pathway itself. These results point to a multi-level signaling model and may help shed light on the dichotomous proliferative role of Notch signaling in many other systems.
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Affiliation(s)
- Caroline Bivik
- Department of Clinical and Experimental Medicine, Linkoping University, Linkoping, Sweden
| | - Ryan B. MacDonald
- Department of Clinical and Experimental Medicine, Linkoping University, Linkoping, Sweden
| | - Erika Gunnar
- Department of Clinical and Experimental Medicine, Linkoping University, Linkoping, Sweden
| | - Khalil Mazouni
- Institut Pasteur, Paris, France
- CNRS, URA2578, Paris, France
| | | | - Stefan Thor
- Department of Clinical and Experimental Medicine, Linkoping University, Linkoping, Sweden
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Becker H, Renner S, Technau GM, Berger C. Cell-Autonomous and Non-cell-autonomous Function of Hox Genes Specify Segmental Neuroblast Identity in the Gnathal Region of the Embryonic CNS in Drosophila. PLoS Genet 2016; 12:e1005961. [PMID: 27015425 PMCID: PMC4807829 DOI: 10.1371/journal.pgen.1005961] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 03/04/2016] [Indexed: 12/12/2022] Open
Abstract
During central nervous system (CNS) development neural stem cells (Neuroblasts, NBs) have to acquire an identity appropriate to their location. In thoracic and abdominal segments of Drosophila, the expression pattern of Bithorax-Complex Hox genes is known to specify the segmental identity of NBs prior to their delamination from the neuroectoderm. Compared to the thoracic, ground state segmental units in the head region are derived to different degrees, and the precise mechanism of segmental specification of NBs in this region is still unclear. We identified and characterized a set of serially homologous NB-lineages in the gnathal segments and used one of them (NB6-4 lineage) as a model to investigate the mechanism conferring segment-specific identities to gnathal NBs. We show that NB6-4 is primarily determined by the cell-autonomous function of the Hox gene Deformed (Dfd). Interestingly, however, it also requires a non-cell-autonomous function of labial and Antennapedia that are expressed in adjacent anterior or posterior compartments. We identify the secreted molecule Amalgam (Ama) as a downstream target of the Antennapedia-Complex Hox genes labial, Dfd, Sex combs reduced and Antennapedia. In conjunction with its receptor Neurotactin (Nrt) and the effector kinase Abelson tyrosine kinase (Abl), Ama is necessary in parallel to the cell-autonomous Dfd pathway for the correct specification of the maxillary identity of NB6-4. Both pathways repress CyclinE (CycE) and loss of function of either of these pathways leads to a partial transformation (40%), whereas simultaneous mutation of both pathways leads to a complete transformation (100%) of NB6-4 segmental identity. Finally, we provide genetic evidences, that the Ama-Nrt-Abl-pathway regulates CycE expression by altering the function of the Hippo effector Yorkie in embryonic NBs. The disclosure of a non-cell-autonomous influence of Hox genes on neural stem cells provides new insight into the process of segmental patterning in the developing CNS. The central nervous system (CNS) needs to be subdivided into functionally specified regions. In the developing CNS of Drosophila, each neural stem cell, called neuroblasts (NB), acquires a unique identity according to its anterior-posterior and dorso-ventral position to generate a specific cell lineage. Along the anterior-posterior body axis, Hox genes of the Bithorax-Complex convey segmental identities to NBs in the trunk segments. In the derived gnathal and brain segments, the mechanisms specifying segmental NB identities are largely unknown. We investigated the role of Hox genes of the Antennapedia-Complex in the gnathal CNS. In addition to cell-autonomous Hox gene function, we unexpectedly uncovered a parallel non-cell-autonomous pathway in mediating segmental specification of embryonic NBs in gnathal segments. Both pathways restrict the expression of the cell cycle gene CyclinE, ensuring the proper specification of a glial cell lineage. Whereas the Hox gene Deformed mediates this cell-autonomously, labial and Antennapedia influence the identity via transcriptional regulation of the secreted molecule Amalgam (and its downstream pathway) in a non-cell-autonomous manner. These findings shed new light on the role of the highly conserved Hox genes during segmental patterning of neural stem cells in the CNS.
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Affiliation(s)
- Henrike Becker
- Institute of Genetics, University of Mainz, Mainz, Germany
| | - Simone Renner
- Institute of Genetics, University of Mainz, Mainz, Germany
| | - Gerhard M. Technau
- Institute of Genetics, University of Mainz, Mainz, Germany
- * E-mail: (CB); (GMT)
| | - Christian Berger
- Institute of Genetics, University of Mainz, Mainz, Germany
- * E-mail: (CB); (GMT)
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Ingber SZ, Pohl HR. Windows of sensitivity to toxic chemicals in the motor effects development. Regul Toxicol Pharmacol 2016; 74:93-104. [PMID: 26686904 PMCID: PMC5599107 DOI: 10.1016/j.yrtph.2015.11.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 11/25/2015] [Accepted: 11/26/2015] [Indexed: 11/26/2022]
Abstract
Many chemicals currently used are known to elicit nervous system effects. In addition, approximately 2000 new chemicals introduced annually have not yet undergone neurotoxicity testing. This review concentrated on motor development effects associated with exposure to environmental neurotoxicants to help identify critical windows of exposure and begin to assess data needs based on a subset of chemicals thoroughly reviewed by the Agency for Toxic Substances and Disease Registry (ATSDR) in Toxicological Profiles and Addenda. Multiple windows of sensitivity were identified that differed based on the maturity level of the neurological system at the time of exposure, as well as dose and exposure duration. Similar but distinct windows were found for both motor activity (GD 8-17 [rats], GD 12-14 and PND 3-10 [mice]) and motor function performance (insufficient data for rats, GD 12-17 [mice]). Identifying specific windows of sensitivity in animal studies was hampered by study designs oriented towards detection of neurotoxicity that occurred at any time throughout the developmental process. In conclusion, while this investigation identified some critical exposure windows for motor development effects, it demonstrates a need for more acute duration exposure studies based on neurodevelopmental windows, particularly during the exposure periods identified in this review.
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Affiliation(s)
- Susan Z Ingber
- Agency for Toxic Substances and Disease Registry, US Department of Health and Human Services, Atlanta, GA, USA
| | - Hana R Pohl
- Agency for Toxic Substances and Disease Registry, US Department of Health and Human Services, Atlanta, GA, USA.
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HATANAKA Y, ZHU Y, TORIGOE M, KITA Y, MURAKAMI F. From migration to settlement: the pathways, migration modes and dynamics of neurons in the developing brain. Proc Jpn Acad Ser B Phys Biol Sci 2016; 92:1-19. [PMID: 26755396 PMCID: PMC4880546 DOI: 10.2183/pjab.92.1] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 10/08/2015] [Indexed: 06/05/2023]
Abstract
Neuronal migration is crucial for the construction of the nervous system. To reach their correct destination, migrating neurons choose pathways using physical substrates and chemical cues of either diffusible or non-diffusible nature. Migrating neurons extend a leading and a trailing process. The leading process, which extends in the direction of migration, determines navigation, in particular when a neuron changes its direction of migration. While most neurons simply migrate radially, certain neurons switch their mode of migration between radial and tangential, with the latter allowing migration to destinations far from the neurons' site of generation. Consequently, neurons with distinct origins are intermingled, which results in intricate neuronal architectures and connectivities and provides an important basis for higher brain function. The trailing process, in contrast, contributes to the late stage of development by turning into the axon, thus contributing to the formation of neuronal circuits.
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Affiliation(s)
- Yumiko HATANAKA
- Division of Cerebral Circuitry, National Institute for Physiological Sciences, Okazaki, Aichi, Japan
| | - Yan ZHU
- Division of Brain Function, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Makio TORIGOE
- Lab Dev Gene Regulation, RIKEN, BSI, Wako, Saitama, Japan
| | - Yoshiaki KITA
- Lab Mol Mech Thalamus Dev, RIKEN BSI, Wako, Saitama, Japan
| | - Fujio MURAKAMI
- Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka, Japan
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Abstract
Spina bifida with or without meningocele or meningomyelocele is encountered infrequently in small animal practice. The English bulldog and Manx cat are breeds predisposed. Although often silent clinically, in those animals with clinical signs, it is important to recognize the signs early and to understand the appropriate imaging modalities employed in establishing a diagnosis. In a select population of affected animals, proposed surgical intervention may be considered to prevent neurologic decline, prevent secondary complications, and potentially improve outcomes.
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Affiliation(s)
- Rachel B Song
- Department of Neurology and Neurosurgery, Red Bank Veterinary Hospital, 197 Hance Avenue, Tinton Falls, NJ 07724, USA
| | - Eric N Glass
- Department of Neurology and Neurosurgery, Red Bank Veterinary Hospital, 197 Hance Avenue, Tinton Falls, NJ 07724, USA
| | - Marc Kent
- Department of Small Animal Medicine & Surgery, College of Veterinary Medicine, University of Georgia, 2200 College Station Road, Athens, GA 30602, USA.
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Borodinsky LN, Belgacem YH. Crosstalk among electrical activity, trophic factors and morphogenetic proteins in the regulation of neurotransmitter phenotype specification. J Chem Neuroanat 2015; 73:3-8. [PMID: 26686293 DOI: 10.1016/j.jchemneu.2015.12.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2015] [Revised: 11/29/2015] [Accepted: 12/02/2015] [Indexed: 01/11/2023]
Abstract
Morphogenetic proteins are responsible for patterning the embryonic nervous system by enabling cell proliferation that will populate all the neural structures and by specifying neural progenitors that imprint different identities in differentiating neurons. The adoption of specific neurotransmitter phenotypes is crucial for the progression of neuronal differentiation, enabling neurons to connect with each other and with target tissues. Preliminary neurotransmitter specification originates from morphogen-driven neural progenitor specification through the combinatorial expression of transcription factors according to morphogen concentration gradients, which progressively restrict the identity that born neurons adopt. However, neurotransmitter phenotype is not immutable, instead trophic factors released from target tissues and environmental stimuli change expression of neurotransmitter-synthesizing enzymes and specific vesicular transporters modifying neuronal neurotransmitter identity. Here we review studies identifying the mechanisms of catecholaminergic, GABAergic, glutamatergic, cholinergic and serotonergic early specification and of the plasticity of these neurotransmitter phenotypes during development and in the adult nervous system. The emergence of spontaneous electrical activity in developing neurons recruits morphogenetic proteins in the process of neurotransmitter phenotype plasticity, which ultimately equips the nervous system and the whole organism with adaptability for optimal performance in a changing environment.
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Affiliation(s)
- Laura N Borodinsky
- Department of Physiology & Membrane Biology and Institute for Pediatric Regenerative Medicine, Shriners Hospital for Children, University of California Davis School of Medicine, 2425 Stockton Blvd, Sacramento, CA 95817, United States.
| | - Yesser H Belgacem
- Department of Physiology & Membrane Biology and Institute for Pediatric Regenerative Medicine, Shriners Hospital for Children, University of California Davis School of Medicine, 2425 Stockton Blvd, Sacramento, CA 95817, United States
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Geyer A, Koltsaki I, Hessinger C, Renner S, Rogulja-Ortmann A. Impact of Ultrabithorax alternative splicing on Drosophila embryonic nervous system development. Mech Dev 2015; 138 Pt 2:177-189. [PMID: 26299253 DOI: 10.1016/j.mod.2015.08.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 08/13/2015] [Accepted: 08/17/2015] [Indexed: 11/17/2022]
Abstract
Hox genes control divergent segment identities along the anteroposterior body axis of bilateral animals by regulating a large number of processes in a cell context-specific manner. How Hox proteins achieve this functional diversity is a long-standing question in developmental biology. In this study we investigate the role of alternative splicing in functional specificity of the Drosophila Hox gene Ultrabithorax (Ubx). We focus specifically on the embryonic central nervous system (CNS) and provide a description of temporal expression patterns of three major Ubx isoforms during development of this tissue. These analyses imply distinct functions for individual isoforms in different stages of neural development. We also examine the set of Ubx isoforms expressed in two isoform-specific Ubx mutant strains and analyze for the first time the effects of splicing defects on regional neural stem cell (neuroblast) identity. Our findings support the notion of specific isoforms having different effects in providing individual neuroblasts with positional identity along the anteroposterior body axis, as well as being involved in regulation of progeny cell fate.
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Affiliation(s)
- Aenne Geyer
- Institute of Genetics, University of Mainz, Mainz, Germany
| | | | | | - Simone Renner
- Institute of Genetics, University of Mainz, Mainz, Germany
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40
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Nawaz S, Sánchez P, Schmitt S, Snaidero N, Mitkovski M, Velte C, Brückner BR, Alexopoulos I, Czopka T, Jung SY, Rhee JS, Janshoff A, Witke W, Schaap IA, Lyons DA, Simons M. Actin filament turnover drives leading edge growth during myelin sheath formation in the central nervous system. Dev Cell 2015; 34:139-151. [PMID: 26166299 PMCID: PMC4736019 DOI: 10.1016/j.devcel.2015.05.013] [Citation(s) in RCA: 151] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 05/08/2015] [Accepted: 05/18/2015] [Indexed: 12/15/2022]
Abstract
During CNS development, oligodendrocytes wrap their plasma membrane around axons to generate multilamellar myelin sheaths. To drive growth at the leading edge of myelin at the interface with the axon, mechanical forces are necessary, but the underlying mechanisms are not known. Using an interdisciplinary approach that combines morphological, genetic, and biophysical analyses, we identified a key role for actin filament network turnover in myelin growth. At the onset of myelin biogenesis, F-actin is redistributed to the leading edge, where its polymerization-based forces push out non-adhesive and motile protrusions. F-actin disassembly converts protrusions into sheets by reducing surface tension and in turn inducing membrane spreading and adhesion. We identified the actin depolymerizing factor ADF/cofilin1, which mediates high F-actin turnover rates, as an essential factor in this process. We propose that F-actin turnover is the driving force in myelin wrapping by regulating repetitive cycles of leading edge protrusion and spreading.
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Affiliation(s)
- Schanila Nawaz
- Max Planck Institute for Experimental Medicine, 37075 Göttingen, Germany
- Department of Neurology, University of Göttingen, 37075 Göttingen, Germany
| | - Paula Sánchez
- Max Planck Institute for Experimental Medicine, 37075 Göttingen, Germany
- Department of Neurology, University of Göttingen, 37075 Göttingen, Germany
- III. Physics Institute, Faculty of Physics, University of Göttingen, 37077 Göttingen, Germany
- Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
| | - Sebastian Schmitt
- Max Planck Institute for Experimental Medicine, 37075 Göttingen, Germany
- Department of Neurology, University of Göttingen, 37075 Göttingen, Germany
| | - Nicolas Snaidero
- Max Planck Institute for Experimental Medicine, 37075 Göttingen, Germany
- Department of Neurology, University of Göttingen, 37075 Göttingen, Germany
| | - Mišo Mitkovski
- Max Planck Institute for Experimental Medicine, 37075 Göttingen, Germany
| | - Caroline Velte
- Max Planck Institute for Experimental Medicine, 37075 Göttingen, Germany
- Department of Neurology, University of Göttingen, 37075 Göttingen, Germany
| | - Bastian R. Brückner
- Institute for Physical Chemistry, University of Göttingen, 37075 Göttingen, Germany
| | | | - Tim Czopka
- Centre for Neuroregeneration, Chancellor’s Building, GU 507B, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
| | - Sang Y. Jung
- Max Planck Institute for Experimental Medicine, 37075 Göttingen, Germany
| | - Jeong S. Rhee
- Max Planck Institute for Experimental Medicine, 37075 Göttingen, Germany
| | - Andreas Janshoff
- Institute for Physical Chemistry, University of Göttingen, 37075 Göttingen, Germany
| | - Walter Witke
- Institute of Genetics, University of Bonn, Karlrobert-Kreiten Strasse 13, 53115 Bonn, Germany
| | - Iwan A.T. Schaap
- III. Physics Institute, Faculty of Physics, University of Göttingen, 37077 Göttingen, Germany
- Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
| | - David A. Lyons
- Centre for Neuroregeneration, Chancellor’s Building, GU 507B, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
| | - Mikael Simons
- Max Planck Institute for Experimental Medicine, 37075 Göttingen, Germany
- Department of Neurology, University of Göttingen, 37075 Göttingen, Germany
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41
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Zuchero JB, Fu MM, Sloan SA, Ibrahim A, Olson A, Zaremba A, Dugas JC, Wienbar S, Caprariello AV, Kantor C, Leonoudakis D, Leonoudakus D, Lariosa-Willingham K, Kronenberg G, Gertz K, Soderling SH, Miller RH, Barres BA. CNS myelin wrapping is driven by actin disassembly. Dev Cell 2015; 34:152-67. [PMID: 26166300 PMCID: PMC4519368 DOI: 10.1016/j.devcel.2015.06.011] [Citation(s) in RCA: 215] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 05/18/2015] [Accepted: 06/11/2015] [Indexed: 12/15/2022]
Abstract
Myelin is essential in vertebrates for the rapid propagation of action potentials, but the molecular mechanisms driving its formation remain largely unknown. Here we show that the initial stage of process extension and axon ensheathment by oligodendrocytes requires dynamic actin filament assembly by the Arp2/3 complex. Unexpectedly, subsequent myelin wrapping coincides with the upregulation of actin disassembly proteins and rapid disassembly of the oligodendrocyte actin cytoskeleton and does not require Arp2/3. Inducing loss of actin filaments drives oligodendrocyte membrane spreading and myelin wrapping in vivo, and the actin disassembly factor gelsolin is required for normal wrapping. We show that myelin basic protein, a protein essential for CNS myelin wrapping whose role has been unclear, is required for actin disassembly, and its loss phenocopies loss of actin disassembly proteins. Together, these findings provide insight into the molecular mechanism of myelin wrapping and identify it as an actin-independent form of mammalian cell motility.
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Affiliation(s)
- J Bradley Zuchero
- Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, USA.
| | - Meng-Meng Fu
- Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Steven A Sloan
- Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Adiljan Ibrahim
- Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Andrew Olson
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Anita Zaremba
- Department of Neurosciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | | | - Sophia Wienbar
- Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Andrew V Caprariello
- Department of Neurosciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Christopher Kantor
- Department of Neurosciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | | | | | | | - Golo Kronenberg
- Klinik für Psychiatrie und Psychotherapie, Charité-Universitätsmedizin Berlin, Charité Campus Mitte, 10117 Berlin, Germany; Klinik und Poliklinik für Neurologie, Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Karen Gertz
- Klinik und Poliklinik für Neurologie, Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Scott H Soderling
- Departments of Cell Biology and Neurobiology, Duke University Medical School, Durham, NC 27710, USA
| | - Robert H Miller
- Department of Neurosciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Ben A Barres
- Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, USA
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42
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Otsuna H, Hutcheson DA, Duncan RN, McPherson AD, Scoresby AN, Gaynes BF, Tong Z, Fujimoto E, Kwan KM, Chien CB, Dorsky RI. High-resolution analysis of central nervous system expression patterns in zebrafish Gal4 enhancer-trap lines. Dev Dyn 2015; 244:785-96. [PMID: 25694140 PMCID: PMC4449297 DOI: 10.1002/dvdy.24260] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 01/26/2015] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND The application of the Gal4/UAS system to enhancer and gene trapping screens in zebrafish has greatly increased the ability to label and manipulate cell populations in multiple tissues, including the central nervous system (CNS). However the ability to select existing lines for specific applications has been limited by the lack of detailed expression analysis. RESULTS We describe a Gal4 enhancer trap screen in which we used advanced image analysis, including three-dimensional confocal reconstructions and documentation of expression patterns at multiple developmental time points. In all, we have created and annotated 98 lines exhibiting a wide range of expression patterns, most of which include CNS expression. Expression was also observed in nonneural tissues such as muscle, skin epithelium, vasculature, and neural crest derivatives. All lines and data are publicly available from the Zebrafish International Research Center (ZIRC) from the Zebrafish Model Organism Database (ZFIN). CONCLUSIONS Our detailed documentation of expression patterns, combined with the public availability of images and fish lines, provides a valuable resource for researchers wishing to study CNS development and function in zebrafish. Our data also suggest that many existing enhancer trap lines may have previously uncharacterized expression in multiple tissues and cell types.
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Affiliation(s)
- Hideo Otsuna
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, Utah
| | - David A Hutcheson
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, Utah
| | - Robert N Duncan
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, Utah
| | - Adam D McPherson
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, Utah
| | - Aaron N Scoresby
- Department of Human Genetics, University of Utah, Salt Lake City, Utah
| | - Brooke F Gaynes
- Department of Human Genetics, University of Utah, Salt Lake City, Utah
| | - Zongzong Tong
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, Utah
| | - Esther Fujimoto
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, Utah
| | - Kristen M Kwan
- Department of Human Genetics, University of Utah, Salt Lake City, Utah
| | - Chi-Bin Chien
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, Utah
| | - Richard I Dorsky
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, Utah
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43
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Gouti M, Metzis V, Briscoe J. The route to spinal cord cell types: a tale of signals and switches. Trends Genet 2015; 31:282-9. [PMID: 25823696 DOI: 10.1016/j.tig.2015.03.001] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 02/28/2015] [Accepted: 03/02/2015] [Indexed: 01/20/2023]
Abstract
Understanding the mechanisms that control induction and elaboration of the vertebrate central nervous system (CNS) requires an analysis of the extrinsic signals and downstream transcriptional networks that assign cell fates in the correct space and time. We focus on the generation and patterning of the spinal cord. We summarize evidence that the origin of the spinal cord is distinct from the anterior regions of the CNS. We discuss how this affects the gene regulatory networks and cell state transitions that specify spinal cord cell subtypes, and we highlight how the timing of extracellular signals and dynamic control of transcriptional networks contribute to the correct spatiotemporal generation of different neural cell types.
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Affiliation(s)
- Mina Gouti
- The Francis Crick Institute, Mill Hill Laboratory, The Ridgeway, Mill Hill, London, NW7 1AA, UK
| | - Vicki Metzis
- The Francis Crick Institute, Mill Hill Laboratory, The Ridgeway, Mill Hill, London, NW7 1AA, UK
| | - James Briscoe
- The Francis Crick Institute, Mill Hill Laboratory, The Ridgeway, Mill Hill, London, NW7 1AA, UK.
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44
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Veeman M, Reeves W. Quantitative and in toto imaging in ascidians: working toward an image-centric systems biology of chordate morphogenesis. Genesis 2015; 53:143-59. [PMID: 25262824 PMCID: PMC4378666 DOI: 10.1002/dvg.22828] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 08/20/2014] [Accepted: 09/25/2014] [Indexed: 12/16/2022]
Abstract
Developmental biology relies heavily on microscopy to image the finely controlled cell behaviors that drive embryonic development. Most embryos are large enough that a field of view with the resolution and magnification needed to resolve single cells will not span more than a small region of the embryo. Ascidian embryos, however, are sufficiently small that they can be imaged in toto with fine subcellular detail using conventional microscopes and objectives. Unlike other model organisms with particularly small embryos, ascidians have a chordate embryonic body plan that includes a notochord, hollow dorsal neural tube, heart primordium and numerous other anatomical details conserved with the vertebrates. Here we compare the size and anatomy of ascidian embryos with those of more traditional model organisms, and relate these features to the capabilities of both conventional and exotic imaging methods. We review the emergence of Ciona and related ascidian species as model organisms for a new era of image-based developmental systems biology. We conclude by discussing some important challenges in ascidian imaging and image analysis that remain to be solved.
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Affiliation(s)
- Michael Veeman
- Division of Biology, Kansas State University, Manhattan KS, USA
| | - Wendy Reeves
- Division of Biology, Kansas State University, Manhattan KS, USA
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45
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Abstract
Dehydroepiandrosterone (DHEA) and its sulfate bound form (DHEAS) are important steroids of mainly adrenal origin. They are produced also in gonads and in the brain. Dehydroepiandrosterone easily crosses the brain-blood barrier and in part is also produced locally in the brain tissue. In the brain, DHEA exerts its effects after conversion to either testosterone and dihydrotestosterone or estradiol via androgen and estrogen receptors present in the most parts of the human brain, through mainly non-genomic mechanisms, or eventually indirectly via the effects of its metabolites formed locally in the brain. As a neuroactive hormone, DHEA in co-operation with other hormones and transmitters significantly affects some aspects of human mood, and modifies some features of human emotions and behavior. It has been reported that its administration can increase feelings of well-being and is useful in ameliorating atypical depressive disorders. It has neuroprotective and antiglucocorticoid activity and modifies immune reactions, and some authors have also reported its role in degenerative brain diseases. Here we present a short overview of the possible actions of dehydroepiandrosterone and its sulfate in the brain, calling attention to various mechanisms of their action as neurosteroids and to prospects for the knowledge of their role in brain disorders.
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Affiliation(s)
- Luboslav Stárka
- Institute of Endocrinology, Národní 8, 11694 Prague, Czech Republic.
| | - Michaela Dušková
- Institute of Endocrinology, Národní 8, 11694 Prague, Czech Republic.
| | - Martin Hill
- Institute of Endocrinology, Národní 8, 11694 Prague, Czech Republic.
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46
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Díaz NF, Cruz-Reséndiz MS, Flores-Herrera H, García-López G, Molina-Hernández A. MicroRNAs in central nervous system development. Rev Neurosci 2014; 25:675-86. [PMID: 24902008 DOI: 10.1515/revneuro-2014-0014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 05/13/2014] [Indexed: 12/23/2022]
Abstract
During early and late embryo neurodevelopment, a large number of molecules work together in a spatial and temporal manner to ensure the adequate formation of an organism. Diverse signals participate in embryo patterning and organization synchronized by time and space. Among the molecules that are expressed in a temporal and spatial manner, and that are considered essential in several developmental processes, are the microRNAs (miRNAs). In this review, we highlight some important aspects of the biogenesis and function of miRNAs as well as their participation in ectoderm commitment and their role in central nervous system (CNS) development. Instead of giving an extensive list of miRNAs involved in these processes, we only mention those miRNAs that are the most studied during the development of the CNS as well as the most likely mRNA targets for each miRNA and its protein functions.
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47
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Hunnekuhl VS, Akam M. An anterior medial cell population with an apical-organ-like transcriptional profile that pioneers the central nervous system in the centipede Strigamia maritima. Dev Biol 2014; 396:136-49. [PMID: 25263198 DOI: 10.1016/j.ydbio.2014.09.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 08/19/2014] [Accepted: 09/18/2014] [Indexed: 12/24/2022]
Abstract
The apical plate of primary marine larvae is characterized by a common set of transcription factors comprising six3, rx, hbn, nk2.1 and FoxQ2. It harbours the apical organ, a neural and ciliary structure with neurosecretory properties. Recent studies in lophotrochozoans have found that apical organ cells form the anterior tip of the developing central nervous system. We identify an anterior medial tissue in the embryonic centipede head that shares the transcriptional profile of the apical plate of marine larvae, including nested domains of FoxQ2 and six3 expression. This domain gives rise to an anterior medial population of neural precursors distinct from those arising within the segmental neuroectoderm. These medial cells do not express achaete scute homologue in proneural clusters, but express collier, a marker for post mitotic cells committed to a neural fate, while they are still situated in the surface ectodermal layer. They then sink under the surface to form a compact cell cluster. Once internalized these cells extend axons that pioneer the primary axonal scaffold of the central nervous system. The same cells express phc2, a neural specific prohormone convertase, which suggests that they form an early active neurosecretory centre. Some also express markers of hypothalamic neurons, including otp, vtn and vax1. These medial neurosecretory cells of the centipede are distinct from those of the pars intercerebralis, the anterior neurosecretory part of the insect brain. The pars intercerebralis derives from vsx positive placodal-like invagination sites. In the centipede, vsx expressing invaginating ectoderm is situated bilaterally adjacent to the medial pioneer cell population. Hence the pars intercerebralis is present in both insect and centipede brains, whereas no prominent anterior medial cluster of pioneer neurons is present in insects. These observations suggest that the arthropod brain retained ancestrally an anterior medial population of neurosecretory cells homologous to those of the apical plate in other invertebrate phyla, but that this cell population has been lost or greatly reduced in insects.
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Affiliation(s)
- Vera S Hunnekuhl
- Laboratory for Development and Evolution, Department of Zoology, Downing Street, Cambridge CB2 3EJ, UK.
| | - Michael Akam
- Laboratory for Development and Evolution, Department of Zoology, Downing Street, Cambridge CB2 3EJ, UK.
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48
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Jeong YM, Jin TE, Choi JH, Lee MS, Kim HT, Hwang KS, Park DS, Oh HW, Choi JK, Korzh V, Schachner M, You KH, Kim CH. Induction of clusterin expression by neuronal cell death in Zebrafish. J Genet Genomics 2014; 41:583-9. [PMID: 25434681 DOI: 10.1016/j.jgg.2014.08.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 08/18/2014] [Accepted: 08/30/2014] [Indexed: 02/05/2023]
Abstract
Clusterin, a protein associated with multiple functions, is expressed in a wide variety of mammalian tissues. Although clusterin is known to be involved in neurodegenerative diseases, ageing, and tumorigenesis, a detailed analysis of the consequences of gain- or loss-of-function approaches has yet to be performed to understand the underlying mechanisms of clusterin functions. Since clusterin levels change in neurological diseases, it is likely that clusterin contributes to cell death and degeneration in general. Zebrafish was investigated as a model system to study human diseases. During development, zebrafish clusterin was expressed in the notochord and nervous system. Embryonic overexpression of clusterin by mRNA microinjection did not affect axis formation, whereas its knock-down by anti-sense morpholino treatment resulted in neuronal cell death. To analyze the function of clusterin in neurodegeneration, a transgenic zebrafish was investigated, in which nitroreductase expression is regulated under the control of a neuron-specific huC promoter which is active between the stages of early neuronal precursors and mature neurons. Nitroreductase turns metronidazole into a cytotoxic agent that induces cell death within 12 h. After metronidazole treatment, transgenic zebrafish showed neuron-specific cell death. Interestingly, we also observed a dramatic induction of clusterin expression in the brain and spinal cord in these fish, suggesting a direct or indirect role of clusterin in neuronal cell death and thus, more generally, in neurodegeneration.
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Affiliation(s)
- Yun-Mi Jeong
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Tae-Eun Jin
- Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-333, Republic of Korea
| | - Jung-Hwa Choi
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Mi-Sun Lee
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Hyun-Taek Kim
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Kyu-Seok Hwang
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Doo-Sang Park
- Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-333, Republic of Korea
| | - Hyun-Woo Oh
- Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-333, Republic of Korea
| | - Joong-Kook Choi
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju 361-763, Republic of Korea
| | - Vladimir Korzh
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore
| | - Melitta Schachner
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ 08854-8082, USA; Center for Neuroscience, Shantou University Medical College, Shantou 515041, China.
| | - Kwan-Hee You
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea.
| | - Cheol-Hee Kim
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea.
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49
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Abstract
The early steps of neural development in the vertebrate embryo are regulated by sets of transcription factors that control the induction of proliferative, pluripotent neural precursors, the expansion of neural plate stem cells, and their transition to differentiating neural progenitors. These early events are critical for producing a pool of multipotent cells capable of giving rise to the multitude of neurons and glia that form the central nervous system. In this review we summarize findings from gain- and loss-of-function studies in embryos that detail the gene regulatory network responsible for these early events. We discuss whether this information is likely to be similar in mammalian embryonic and induced pluripotent stem cells that are cultured according to protocols designed to produce neurons. The similarities and differences between the embryo and stem cells may provide important guidance to stem cell protocols designed to create immature neural cells for therapeutic uses.
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Affiliation(s)
- Hyun-Kyung Lee
- ABRC, School of Life Sciences, BK21 Plus KNU Creative BioReserach Group, Kyungpook National University, Daegu 702-702,
Korea
| | - Hyun-Shik Lee
- ABRC, School of Life Sciences, BK21 Plus KNU Creative BioReserach Group, Kyungpook National University, Daegu 702-702,
Korea
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50
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Zhou Y, Nathans J. Gpr124 controls CNS angiogenesis and blood-brain barrier integrity by promoting ligand-specific canonical wnt signaling. Dev Cell 2014; 31:248-56. [PMID: 25373781 DOI: 10.1016/j.devcel.2014.08.018] [Citation(s) in RCA: 181] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 06/30/2014] [Accepted: 08/20/2014] [Indexed: 01/12/2023]
Abstract
Canonical Wnt signaling in endothelial cells (ECs) is required for vascularization of the central nervous system (CNS) and for formation and maintenance of barrier properties unique to CNS vasculature. Gpr124 is an orphan member of the adhesion G protein-coupled receptor family that is expressed in ECs and is essential for CNS angiogenesis and barrier formation via an unknown mechanism. Using canonical Wnt signaling assays in cell culture and genetic loss- and gain-of-function experiments in mice, we show that Gpr124 functions as a coactivator of Wnt7a- and Wnt7b-stimulated canonical Wnt signaling via a Frizzled receptor and Lrp coreceptor and that Gpr124-stimulated signaling functions in concert with Norrin/Frizzled4 signaling to control CNS vascular development. These experiments identify Gpr124 as a ligand-specific coactivator of canonical Wnt signaling.
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Affiliation(s)
- Yulian Zhou
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Jeremy Nathans
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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