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Zebrafish brain development

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https://www.readbyqxmd.com/read/29760055/chemokine-c-c-motif-ligand-33-is-a-key-regulator-of-teleost-fish-barbel-development
#1
Tao Zhou, Ning Li, Yulin Jin, Qifan Zeng, Wendy Prabowo, Yang Liu, Changxu Tian, Lisui Bao, Shikai Liu, Zihao Yuan, Qiang Fu, Sen Gao, Dongya Gao, Rex Dunham, Neil H Shubin, Zhanjiang Liu
Barbels are important sensory organs in teleosts, reptiles, and amphibians. The majority of ∼4,000 catfish species, such as the channel catfish ( Ictalurus punctatus ), possess abundant whisker-like barbels. However, barbel-less catfish, such as the bottlenose catfish ( Ageneiosus marmoratus ), do exist. Barbeled catfish and barbel-less catfish are ideal natural models for determination of the genomic basis for barbel development. In this work, we generated and annotated the genome sequences of the bottlenose catfish, conducted comparative and subtractive analyses using genome and transcriptome datasets, and identified differentially expressed genes during barbel regeneration...
May 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29757273/isolation-and-rna-extraction-of-neurons-macrophages-and-microglia-from-larval-zebrafish-brains
#2
Julie Mazzolini, Kelda Chia, Dirk Sieger
To gain a detailed understanding of the role of different CNS cells during development or the establishment and progression of brain pathologies, it is important to isolate these cells without changing their gene expression profile. The zebrafish model provides a large number of transgenic fish lines in which specific cell types are labelled; for example neurons in the NBT:DsRed line or macrophages/microglia in the mpeg1:eGFP line. Furthermore, antibodies have been developed to stain specific cells, such as microglia with the 4C4 antibody...
April 27, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29753248/embryonic-exposure-to-benzo-a-pyrene-inhibits-reproductive-capability-in-adult-female-zebrafish-and-correlation-with-dna-methylation
#3
Dongxu Gao, Jing Lin, Kunlin Ou, Ying Chen, Hongbin Li, Qinhua Dai, Zhenni Yu, Zhenghong Zuo, Chonggang Wang
This study was conducted to investigate the effects of embryonic short-term exposure to benzo(a)pyrene (BaP), a model polycyclic aromatic hydrocarbon, on ovarian development and reproductive capability in adult female zebrafish. In 1-year-old fish after embryonic exposure to BaP for 96 h, the gonadosomatic indices and the percentage of mature oocytes were significantly decreased in the 0.5, 5 and 50 nmol/L treatments. The spawned egg number, the fertilization rate and the hatching success were significantly reduced, while the malformation rate of the F1 unexposed larvae were increased...
May 9, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29752575/expression-pattern-of-cdkl5-during-zebrafish-early-development-implications-for-use-as-model-for-atypical-rett-syndrome
#4
Marta Vitorino, Nídia Cunha, Natércia Conceição, M Leonor Cancela
Atypical Rett syndrome is a child neurodevelopmental disorder induced by mutations in CDKL5 gene and characterized by a progressive regression in development with loss of purposeful use of the hands, slowed brain and head growth, problems with walking, seizures, and intellectual disability. At the moment, there is no cure for this pathology and little information is available concerning animal models capable of mimicking its phenotypes, thus the development of additional animal models should be of interest to gain more knowledge about the disease...
May 11, 2018: Molecular Biology Reports
https://www.readbyqxmd.com/read/29752386/nppa-and-nppb-act-redundantly-during-zebrafish-cardiac-development-to-confine-avc-marker-expression-and-reduce-cardiac-jelly-volume
#5
Daniela R Grassini, Anne K Lagendijk, Jessica E De Angelis, Jason Da Silva, Angela Jeanes, Nicole Zettler, Neil I Bower, Benjamin M Hogan, Kelly A Smith
Atrial natriuretic peptide ( nppa/anf ) and brain natriuretic peptide ( nppb/bnp ) form a gene cluster with expression in the chambers of the developing heart. Despite restricted expression, a function in cardiac development has not been demonstrated by mutant analysis. This is attributed to functional redundancy however their genomic location in cis has impeded formal analysis. Using genome-editing, we generated mutants for nppa and nppb and found single mutants indistinguishable from wildtype whereas nppa / nppb double mutants display heart morphogenesis defects and pericardial oedema...
May 11, 2018: Development
https://www.readbyqxmd.com/read/29750281/an-orthotopic-glioblastoma-animal-model-suitable-for-high-throughput-screenings
#6
Linda Pudelko, Steven Edwards, Mirela Balan, Daniel Nyqvist, Jonathan Al-Saadi, Johannes Dittmer, Ingrid Almlöf, Thomas Helleday, Lars Bräutigam
Background: Glioblastoma (GBM) is an aggressive form of brain cancer with poor prognosis. Although murine animal models have given valuable insights into the GBM disease biology, they cannot be used in high-throughput screens to identify and profile novel therapies. The only vertebrate model suitable for large-scale screens, the zebrafish, has proven to faithfully recapitulate biology and pathology of human malignancies and clinically relevant orthotopic zebrafish models have been developed...
May 10, 2018: Neuro-oncology
https://www.readbyqxmd.com/read/29749044/mycobacteria-employ-two-different-mechanisms-to-cross-the-blood-brain-barrier
#7
L M van Leeuwen, M Boot, C Kuijl, D I Picavet, G van den Brink, S M A van der Pol, H E de Vries, N N van der Wel, M van der Kuip, A M van Furth, A M van der Sar, W Bitter
Central nervous system (CNS) infection by Mycobacterium tuberculosis is one of the most devastating complications of tuberculosis, in particular in early childhood. In order to induce CNS infection, M. tuberculosis needs to cross specialized barriers protecting the brain. How M. tuberculosis crosses the blood-brain barrier (BBB) and enters the CNS is not well understood. Here, we use transparent zebrafish larvae and the closely related pathogen Mycobacterium marinum to answer this question. We show that in the early stages of development mycobacteria rapidly infect brain tissue, either as free mycobacteria or within circulating macrophages...
May 10, 2018: Cellular Microbiology
https://www.readbyqxmd.com/read/29736716/modulation-of-threat-response-in-larval-zebrafish
#8
Andrew J Rennekamp
High-throughput, whole-organism phenotypic drug screening is made possible using live zebrafish larvae. Many human drugs have now been shown to affect zebrafish larvae in similar ways, through homologous molecular mechanisms. At this stage in life, zebrafish are small enough to fit in multi-well, microliter plates, yet developed enough to exhibit complex phenotypes, such as hunting behaviors and avoidance of predators. Importantly, zebrafish larvae can be easily dosed via automated pipetting of chemical compounds directly into their liquid medium, without injection...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29727300/rab23-and-developmental-disorders
#9
Catherine H H Hor, Bor Luen Tang, Eyleen L K Goh
Rab23 is a conserved member of the Rab family of small GTPases that regulates membrane trafficking in eukaryotes. It is unique amongst the Rabs in terms of its implicated role in mammalian development, as originally illustrated by the embryonic lethality and open neural tube phenotype of a spontaneous mouse mutant that carries homozygous mutation of open brain, a gene encoding Rab23. Rab23 was initially identified to act as an antagonist of Sonic hedgehog (Shh) signaling, and has since been implicated in a number of physiological and pathological roles, including oncogenesis...
May 4, 2018: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/29723547/hyperglycemia-elicits-anxiety-like-behaviors-in-zebrafish-protective-role-of-dietary-diphenyl-diselenide
#10
Matheus M Dos Santos, Gabriel T de Macedo, Alessandro S Prestes, Vânia L Loro, Graciela M Heidrich, Rochele S Picoloto, Denis B Rosemberg, Nilda V Barbosa
Diabetes mellitus (DM) is a chronic metabolic disease that may comorbid with various psychiatric disorders, such as anxiety and depression. The search for effective therapeutics to alleviate hyperglycemia and complications resulting from DM is continuous. Here we investigate the effects of diphenyl diselenide (DD), an organoselenium compound with several pharmacological properties, in a zebrafish model of hyperglycemia. Fish were fed for 74 days with a diet containing 3 mg/Kg DD, a concentration chosen after experiments based in a dose-response curve (DD 1, 2 and 3 mg/Kg) that did not cause overt toxicity (mortality, weight loss and neurobehavioral deficits)...
April 30, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29704525/opportunities-and-challenges-for-using-the-zebrafish-to-study-neuronal-connectivity-as-an-endpoint-of-developmental-neurotoxicity
#11
REVIEW
Galen W Miller, Vidya Chandrasekaran, Bianca Yaghoobi, Pamela J Lein
Chemical exposures have been implicated as environmental risk factors that interact with genetic susceptibilities to influence individual risk for complex neurodevelopmental disorders, including autism spectrum disorder, schizophrenia, attention deficit hyperactivity disorder and intellectual disabilities. Altered patterns of neuronal connectivity represent a convergent mechanism of pathogenesis for these and other neurodevelopmental disorders, and growing evidence suggests that chemicals can interfere with specific signaling pathways that regulate the development of neuronal connections...
April 25, 2018: Neurotoxicology
https://www.readbyqxmd.com/read/29702678/expression-of-the-eight-gabaa-receptor-%C3%AE-subunits-in-the-developing-zebrafish-central-nervous-system
#12
Bryan Monesson-Olson, Jon J McClain, Abigail E Case, Hanna E Dorman, Daniel R Turkewitz, Aaron B Steiner, Gerald B Downes
GABA is a robust regulator of both developing and mature neural networks. It exerts many of its effects through GABAA receptors, which are heteropentamers assembled from a large array of subunits encoded by distinct genes. In mammals, there are 19 different GABAA subunit types, which are divided into the α, β, γ, δ, ε, π, θ and ρ subfamilies. The immense diversity of GABAA receptors is not fully understood. However, it is known that specific isoforms, with their distinct biophysical properties and expression profiles, tune responses to GABA...
2018: PloS One
https://www.readbyqxmd.com/read/29692731/differential-toxicity-of-mdia-formin-directed-functional-agonists-and-antagonists-in-developing-zebrafish
#13
Hunter LeCorgne, Andrew M Tudosie, Kari Lavik, Robin Su, Kathryn N Becker, Sara Moore, Yashna Walia, Alexander Wisner, Daniel Koehler, Arthur S Alberts, Frederick E Williams, Kathryn M Eisenmann
The mammalian Diaphanous-related (mDia) formins are cytoskeletal regulators that assemble and, in some cases, bundle filamentous actin (F-actin), as well as stabilize microtubules. The development of small molecule antagonists and agonists that interrogate mDia formin function has allowed us to investigate the roles of formins in disease states. A small molecule inhibitor of FH2 domain (SMIFH2) inhibits mDia-dependent actin dynamics and abrogates tumor cell migration and cell division in vitro and ex vivo tissue explants...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29691940/novel-cask-mutations-in-cases-with-syndromic-microcephaly
#14
Francesca Cristofoli, Koen Devriendt, Erica E Davis, Hilde Van Esch, Joris R Vermeesch
Mutations in CASK cause a wide spectrum of phenotypes in humans ranging from mild X-linked intellectual disability to a severe microcephaly (MC) and pontocerebellar hypoplasia syndrome. Nevertheless, predicting pathogenicity and phenotypic consequences of novel CASK mutations through the exclusive consideration of genetic information and population-based data remains a challenge. Using whole exome sequencing, we identified four novel CASK mutations in individuals with syndromic MC. To understand the functional consequences of the different point mutations on the development of MC and cerebellar defects we established a transient loss of function zebrafish model, and demonstrate recapitulation of relevant neuroanatomical phenotypes...
April 24, 2018: Human Mutation
https://www.readbyqxmd.com/read/29686887/role-of-dna-methylation-in-altered-gene-expression-patterns-in-adult-zebrafish-danio-rerio-exposed-to-3-3-4-4-5-pentachlorobiphenyl-pcb-126
#15
Neelakanteswar Aluru, Sibel I Karchner, Keegan S Krick, Wei Zhu, Jiang Liu
There is growing evidence that environmental toxicants can affect various physiological processes by altering DNA methylation patterns. However, very little is known about the impact of toxicant-induced DNA methylation changes on gene expression patterns. The objective of this study was to determine the genome-wide changes in DNA methylation concomitant with altered gene expression patterns in response to 3, 3', 4, 4', 5-pentachlorobiphenyl (PCB126) exposure. We used PCB126 as a model environmental chemical because the mechanism of action is well-characterized, involving activation of aryl hydrocarbon receptor, a ligand-activated transcription factor...
January 2018: Environmental Epigenetics
https://www.readbyqxmd.com/read/29680360/forebrain-glutamate-uptake-and-behavioral-parameters-are-altered-in-adult-zebrafish-after-the-induction-of-status-epilepticus-by-kainic-acid
#16
Ben Hur Marins Mussulini, Adriana Fernanda Kuckartz Vizuete, Marcos Braga, Luana Moro, Suelen Baggio, Emerson Santos, Gabriela Lazzarotto, Kamila Cagliari Zenki, Letícia Pettenuzzo, João Batista Texeira Rocha, Diogo Losch de Oliveira, Maria Elisa Calcagnotto, José Angelo Silveira Zuanazzi, Javier Santos Burgos, Eduardo Pacheco Rico
The development of new antiepileptic drugs is a high-risk/high-cost research field, which is made even riskier if the behavioral epileptic seizure profile is the unique approach on which the development is based. In order to increase the effectiveness of the screening conducted in the zebrafish model of status epilepticus (SE), the evaluation of neurochemical markers of SE would be of great relevance. Epilepsy is associated with changes in the glutamatergic system, and glutamate uptake is one of the critical parameters of this process...
April 19, 2018: Neurotoxicology
https://www.readbyqxmd.com/read/29665503/zebrafish-extracellular-matrix-improves-neuronal-viability-and-network-formation-in-a-3-dimensional-culture
#17
Sung-Min Kim, Daniel Ward Long, Michael Wai Kok Tsang, Yadong Wang
Mammalian central nervous system (CNS) has limited capacity for regeneration. CNS injuries cause life-long debilitation and lead to $50 billion in healthcare costs in U.S. alone each year. Despite numerous efforts in the last few decades, CNS-related injuries remain as detrimental as they were 50 years ago. Some functional recovery can occur, but most regeneration are limited by an extracellular matrix (ECM) that actively inhibits axonal repair and promotes glial scarring. In most tissues, the ECM is an architectural foundation that plays an active role in supporting cellular development and regenerative response after injury...
April 6, 2018: Biomaterials
https://www.readbyqxmd.com/read/29662090/optical-interrogation-of-neuronal-circuitry-in-zebrafish-using-genetically-encoded-voltage-indicators
#18
Hiroaki Miyazawa, Kanoko Okumura, Kanae Hiyoshi, Kazuhiro Maruyama, Hisaya Kakinuma, Ryunosuke Amo, Hitoshi Okamoto, Kyo Yamasu, Sachiko Tsuda
Optical measurement of membrane potentials enables fast, direct and simultaneous detection of membrane potentials from a population of neurons, providing a desirable approach for functional analysis of neuronal circuits. Here, we applied recently developed genetically encoded voltage indicators, ASAP1 (Accelerated Sensor of Action Potentials 1) and QuasAr2 (Quality superior to Arch 2), to zebrafish, an ideal model system for studying neurogenesis. To achieve this, we established transgenic lines which express the voltage sensors, and showed that ASAP1 is expressed in zebrafish neurons...
April 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29655639/glia-maturation-factor-beta-is-required-for-reactive-gliosis-after-traumatic-brain-injury-in-zebrafish
#19
Guo Yin, Mingjun Du, Rong Li, Ke Li, Xiaomin Huang, Dongbei Duan, Xiaolan Ai, Fang Yao, Lanlan Zhang, Ziyou Hu, Bingyi Wu
Gliosis is a hallmark of neural pathology that occurs after most forms of central nervous system (CNS) injuries including traumatic brain injury (TBI). Identification of genes that control gliosis may provide novel treatment targets for patients with diverse CNS injuries. Glia maturation factor beta (GMFB) is crucial in brain development and stress response. In the present study, GMFB was found to be widely expressed in adult zebrafish telencephalon. A gmfb mutant zebrafish was created using CRISPR/cas9. In the uninjured zebrafish telencephalon, glial fibrillary acidic protein (GFAP) fibers in gmfb mutants were disorganized and shorter than wild type zebrafish...
April 12, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29619162/crispr-cas9-induced-shank3b-mutant-zebrafish-display-autism-like-behaviors
#20
Chun-Xue Liu, Chun-Yang Li, Chun-Chun Hu, Yi Wang, Jia Lin, Yong-Hui Jiang, Qiang Li, Xiu Xu
Background: Human genetic and genomic studies have supported a strong causal role of SHANK3 deficiency in autism spectrum disorder (ASD). However, the molecular mechanism underlying SHANK3 deficiency resulting in ASD is not fully understood. Recently, the zebrafish has become an attractive organism to model ASD because of its high efficiency of genetic manipulation and robust behavioral phenotypes. The orthologous gene to human SHANK3 is duplicated in the zebrafish genome and has two homologs, shank3a and shank3b ...
2018: Molecular Autism
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