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Gene Expression Patterns: GEP

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https://www.readbyqxmd.com/read/28414113/sept8a-and-sept8b-mrna-expression-in-the-developing-and-adult-zebrafish
#1
Constantin Berger, Frederik Helmprobst, Prisca Chapouton, Christina Lillesaar, Christian Stigloher
Septins are highly conserved GTP-binding proteins involved in numerous cellular processes. Despite a growing awareness of their roles in the cell biology, development and signal transmission in nervous systems, comparably little is known about precise septin expression. Here, we use the well-established model organism zebrafish (Danio rerio) to unravel the expression of sept8a and sept8b, with special focus on the CNS. We performed whole mount RNA in situ hybridization on zebrafish 1-4 dpf in combination with serial sectioning of epon-embedded samples as well as on brain sections of adult zebrafish to obtain precise histological mapping of gene expression...
April 14, 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28400174/jmj24-antagonizes-histone-h3k9-demethylase-ibm1-jmj25-function-and-interacts-with-rnai-pathways-for-gene-silencing
#2
Laure Audonnet, Yuan Shen, Dao-Xiu Zhou
Dimethylation of histone H3 lysine 9 (H3K9me2) is a heterochromatic mark linked to DNA methylation and gene repression. Removal of H3K9me2 from gene bodies by the jmjC histone demethylase IBM1/JMJ25 inhibits DNA methylation and derepresses gene expression. In this work, we analyzed the function of a closely related homolog of IBM1/JMJ25, namely JMJ24. We show that jmj24 mutations produced a number of subtle developmental defects, while affecting only a relatively small number of genes at the vegetative stage...
April 8, 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28363633/high-resolution-methylation-analysis-of-the-hoxa5-regulatory-region-in-different-somatic-tissues-of-laboratory-mouse-during-development
#3
Puja Sinha, Kiran Singh, Manisha Sachan
Homeobox genes encode a group of DNA binding regulatory proteins whose key function occurs in the spatial-temporal organization of genome during embryonic development and differentiation. The role of these Hox genes during ontogenesis makes it an important model for research. HoxA5 is a member of Hox gene family playing a central role during axial body patterning and morphogenesis. DNA modification studies have shown that the function of Hox genes is partly governed by the methylation-mediated gene expression regulation...
January 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28363632/regional-localization-of-activin-%C3%AE-a-activin-%C3%AE-c-follistatin-proliferation-and-apoptosis-in-adult-and-developing-mouse-prostate-ducts
#4
Elspeth Gold, Sylvia Zellhuber-McMillan, Gail Risbridger, Francesco Elia Marino
Activins and inhibins, members of the TGF-β superfamily, are growth and differentiation factors involved in the regulation of several biological processes, including reproduction, development, and fertility. Previous studies have shown that the activin-βA subunit plays a pivotal role in prostate development. Activin-A inhibits branching morphogenesis in the developing prostate, and its expression is associated with increased apoptosis in the adult prostate. Follistatin, a structurally unrelated protein to activins, is an antagonist of activin-A...
January 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28351515/the-expression-of-sialyltransferases-is-regulated-by-the-bioavailability-and-biosynthesis-of-sialic-acids
#5
Kaya Bork, Wenke Weidemann, Beatrice Berneck, Magdalena Kuchta, Dorit Bennmann, Annett Thate, Otmar Huber, Vinayaga S Gnanapragassam, Rüdiger Horstkorte
Glycosylation is the most frequent and important post-translational modification of proteins. It occurs on specific consensus sequences but the final structure of a particular glycan is not coded on the DNA, rather it depends on the expression of the required enzymes and the availability of substrates (activated monosaccharides). Sialic acid (Sia) is the terminal monosaccharide of most glycoproteins or glycolipids (= glycoconjugates) and involved in a variety of function on molecular (e.g. determination of protein stability and half-life) and cellular level (e...
January 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28300657/expression-patterns-of-prune2-is-regulated-by-notch-and-retinoic-acid-signaling-pathways-in-the-zebrafish-embryogenesis
#6
Mrudhula Anuppalle, Sateesh Maddirevula, Ajeet Kumar, Tae-Lin Huh, Joonho Choe, Myungchull Rhee
PRUNE2 has been identified as a susceptible gene for Alzheimer's disease and a marker for leiomyosarcomas. Isoforms of Prune2 regulate neuronal cell differentiation and synaptogenesis. Although expression pattern of Prune2 has been reported in the murine brain, its expression patterns and regulation along vertebrate embryogenesis remain to be further investigated. We thus defined the expression profiles and transcriptional regulation of prune2 in zebrafish embryos. prune2 exhibits maternal expression, but is increased in later embryonic stages, and expressed in the telencephalon, epiphysis cluster, nucleus of the tract of the post optic commissure, spinal cord, cerebellum, tegmentum, anterior lateral line ganglion, posterior lateral line ganglion and rhombomeres 2 through 5...
January 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28288836/temporal-profiling-of-photoreceptor-lineage-gene-expression-during-murine-retinal-development
#7
Tooka Aavani, Nobuhiko Tachibana, Valerie Wallace, Jeffrey Biernaskie, Carol Schuurmans
Rod and cone photoreceptors are photosensitive cells in the retina that convert light to electrical signals that are transmitted to visual processing centres in the brain. During development, cones and rods are generated from a common pool of multipotent retinal progenitor cells (RPCs) that also give rise to other retinal cell types. Cones and rods differentiate in two distinct waves, peaking in mid-embryogenesis and the early postnatal period, respectively. As RPCs transition from making cones to generating rods, there are changes in the expression profiles of genes involved in photoreceptor cell fate specification and differentiation...
January 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28167138/characterization-of-arteriovenous-identity-in-the-developing-neonate-mouse-retina
#8
Angela M Crist, Chandler Young, Stryder M Meadows
The murine retina has become an ideal model to study blood vessel formation. Blood vessels in the retina undergo various processes, including remodeling and differentiation, to form a stereotypical network that consists of precisely patterned arteries and veins. This model presents a powerful tool for understanding many different aspects of angiogenesis including artery and vein (AV) cell fate acquisition and differentiation. However, characterization of AV differentiation has been largely unexplored in the mouse retinal model...
January 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28093350/a-visual-screen-for-diet-regulated-proteins-in-the-drosophila-ovary-using-gfp-protein-trap-lines
#9
Hwei-Jan Hsu, Daniela Drummond-Barbosa
The effect of diet on reproduction is well documented in a large number of organisms; however, much remains to be learned about the molecular mechanisms underlying this connection. The Drosophila ovary has a well described, fast and largely reversible response to diet. Ovarian stem cells and their progeny proliferate and grow faster on a yeast-rich diet than on a yeast-free (poor) diet, and death of early germline cysts, degeneration of early vitellogenic follicles and partial block in ovulation further contribute to the ∼60-fold decrease in egg laying observed on a poor diet...
January 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28038958/temporal-and-spatial-expression-pattern-of-nnat-during-mouse-eye-development
#10
Saadettin Sel, Eva Patzel, Lucia Poggi, Delia Kaiser, Thomas Kalinski, Martin Schicht, Friedrich Paulsen, Norbert Nass
BACKGROUND: Neuronatin (Nnat) was initially identified as a highly expressed gene in neonatal mammalian brain. In this study, we analyze the spatial and temporal expression pattern of Nnat during mouse eye development as well as in the adult. METHODS: The expression of Nnat was analyzed on mRNA as well as protein level. The presence of Nnat transcripts in the adult retina was examined using reverse transcription-polymerase chain reaction (RT-PCR). Nnat protein expression was evaluated by Western blot and immunohistochemistry during eye development at embryonic day (E) 12, 15, 16 and postnatal day (P) 7, 14, 30 and 175 (adult)...
January 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/28034797/expression-profile-of-rrbp1-genes-during-embryonic-development-and-in-adult-tissues-of-xenopus-laevis
#11
Guang-Hui Liu, Cheng-Zhou Mao, Hai-Yan Wu, Deng-Cheng Zhou, Jing-Bo Xia, Soo-Ki Kim, Dong-Qing Cai, Hui Zhao, Xu-Feng Qi
Recent studies suggest that ribosome-binding protein 1 (RRBP1) is involved in multiple diseases such as tumorigenesis and cardiomyopathies. However, its function during embryonic development remains largely unknown. We searched Xenopus laevis database with human RRBP1 protein sequence and identified two cDNA sequences encoding Xenopus orthologs of RRBP1 including rrbp1a (NM_001089623) and rrbp1b (NM_001092468). Both genes were firstly detected at blastula stage 8 with weak signals in animal hemisphere by whole mount in situ hybridization...
January 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/27826126/the-expression-patterns-of-tetratricopeptide-repeat-domain-36-ttc36
#12
Yuru Zhou, Qingling He, Jihui Chen, Yunhong Liu, Zhaomin Mao, Zhongshi Lyu, Dongsheng Ni, Yaoshui Long, Pan Ju, Jianing Liu, Yuping Gu, Qin Zhou
Tetratricopeptide repeat domain 36 (Ttc36), whose coding protein belongs to tetratricopeptide repeat (TPR) motif family, has not been studied extensively. We for the first time showed that Ttc36 is evolutionarily conserved across mammals by bioinformatics. Rabbit anti-mouse Ttc36 polyclonal antibody was generated by injecting synthetic full-length peptides through "antigen intersection" strategy. Subsequently, we characterized Ttc36 expression profile in mouse, showing its expression in liver and kidney both from embryonic day 15...
November 2016: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/27818290/developmental-expression-of-mglu2-and-mglu3-in-the-mouse-brain
#13
Caitlin E McOmish, Elena Y Demireva, Jay A Gingrich
The glutamatergic system directs central nervous system (CNS) neuronal activity and may underlie various neuropsychiatric disorders. Glutamate transmits its effects through multiple receptor classes. Class II metabotropic glutamate receptors, mGlu2 and mGlu3, play an important role in regulating synaptic release of different neurotransmitter systems and consequently modulate signaling across several neuronal subtypes. Drugs targeting mGlu2 and mGlu3 are seen as potential therapeutics for various psychiatric and neurological disorders, and defining their expression through development can aid in understanding their distinct function...
November 2016: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/27670931/expression-of-the-insulinoma-associated-1-insm1-gene-in-xenopus-laevis-tadpole-retina-and-brain
#14
Jennifer L Bosse, Heithem M El-Hodiri
The insulinoma-associated 1 (insm1) gene is involved in the differentiation of several neuronal and endoderm derived cell types. insm1 is expressed in the retina and brain of several vertebrates including Xenopus laevis. We report the detailed expression pattern of insm1 in the X. laevis tadpole retina and brain. X. laevis insm1 is expressed in most of the ciliary marginal zone of the mature retina and the optic tectum, dorsal pallium, hypothalamus and preoptic areas of the developing tadpole brain. Overall, insm1 is expressed in regions of the tadpole brain and retina harboring populations of progenitor cells...
September 2016: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/27664768/gene-expression-analysis-during-the-induction-and-patterning-of-the-conjunctival-papillae-in-the-chick-embryonic-eye
#15
Karyn Jourdeuil, Tamara Anne Franz-Odendaal
The induction and patterning of the conjunctival papillae (i.e. epithelial thickenings of the conjunctiva required for the induction of the underlying, neural crest-derived scleral ossicles) is complex. It takes place over a period of two days and follows a defined spatiotemporal sequence. In this study, we investigated the spatial and temporal expression pattern of four genes over seven morphological stages of development of these papillae. We show that β-catenin is expressed during the pre-patterning of the epithelium prior to papilla induction and second that β-catenin, Ednrb and Inhba are expressed during the induction and patterning of the conjunctival papillae...
September 2016: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/27613600/expression-profiles-of-the-g%C3%AE-subunits-during-xenopus-tropicalis-embryonic-development
#16
Jaime Fuentealba, Gabriela Toro-Tapia, Marion Rodriguez, Cecilia Arriagada, Alejandro Maureira, Andrea Beyer, Soraya Villaseca, Juan I Leal, Maria V Hinrichs, Juan Olate, Teresa Caprile, Marcela Torrejón
Heterotrimeric G protein signaling plays major roles during different cellular events. However, there is a limited understanding of the molecular mechanisms underlying G protein control during embryogenesis. G proteins are highly conserved and can be grouped into four subfamilies according to sequence homology and function. To further studies on G protein function during embryogenesis, the present analysis identified four Gα subunits representative of the different subfamilies and determined their spatiotemporal expression patterns during Xenopus tropicalis embryogenesis...
September 2016: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/27613599/embryonic-expression-patterns-of-hox-genes-in-the-oligochaete-annelid-tubifex-tubifex
#17
Mao Endo, Chiharu Sakai, Takashi Shimizu
We have cloned and characterized the expression of seven Hox genes (designated Ttu-lab, Ttu-Dfd, Ttu-Scr1, Ttu-Scr2, Ttu-Lox5, Ttu-Lox4 and Ttu-Lox2) from the oligochaete annelid Tubifex tubifex. RT-PCR analyses show that except for Ttu-Lox4 and Ttu-Lox2 which begin expression as early as cleavage stages, Tubifex Hox genes are expressed during stages 13-18 when embryos undergo germ band formation, segmentation and body elongation. In terms of combination of tissues (or organs) exhibiting positive cells, the Tubifex Hox genes examined in this study are classified into three groups...
September 2016: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/27593944/development-of-the-cardiac-conduction-system-in-zebrafish
#18
Kar-Lai Poon, Michael Liebling, Igor Kondrychyn, Thomas Brand, Vladimir Korzh
The cardiac conduction system (CCS) propagates and coordinates the electrical excitation that originates from the pacemaker cells, throughout the heart, resulting in rhythmic heartbeat. Its defects result in life-threatening arrhythmias and sudden cardiac death. Understanding of the factors involved in the formation and function of the CCS remains incomplete. By transposon assisted transgenesis, we have developed enhancer trap (ET) lines of zebrafish that express fluorescent protein in the pacemaker cells at the sino-atrial node (SAN) and the atrio-ventricular region (AVR), termed CCS transgenics...
July 2016: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/27545450/differential-gene-expression-patterns-and-colocalization-of-atp-gated-p2x6-p2x4-ion-channels-during-rat-small-intestine-ontogeny
#19
Karla Padilla, David Gonzalez-Mendoza, Laura C Berumen, Jesica E Escobar, Ricardo Miledi, Guadulupe García-Alcocer
Gene coding for ATP-gated receptor ion channels (P2X1-7) has been associated with the developmental process in various tissues; among these ion channel subtypes, P2X6 acts as a physiological regulator of P2X4 receptor functions when the two receptors form heteroreceptors. The P2X4 receptor is involved in pain sensation, the inflammatory process, and body homeostasis by means of Mg(2+) absorption through the intestine. The small intestine is responsible for the absorption and digestion of nutrients; throughout its development, several gene expressions are induced that are related to nutrients received, metabolism, and other intestine functions...
July 2016: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/27521061/expression-patterns-of-homeobox-genes-in-the-mouse-vomeronasal-organ-at-postnatal-stages
#20
Isabelle Chang, Marta Parrilla
Homeodomain proteins are encoded by homeobox genes and regulate development and differentiation in many neuronal systems. The mouse vomeronasal organ (VNO) generates in situ mature chemosensory neurons from stem cells. The roles of homeodomain proteins in neuronal differentiation in the VNO are poorly understood. Here we have characterized the expression patterns of 28 homeobox genes in the VNO of C57BL/6 mice at postnatal stages using multicolor fluorescent in situ hybridization. We identified 11 homeobox genes (Dlx3, Dlx4, Emx2, Lhx2, Meis1, Pbx3, Pknox2, Pou6f1, Tshz2, Zhx1, Zhx3) that were expressed exclusively in neurons; 4 homeobox genes (Pax6, Six1, Tgif1, Zfhx3) that were expressed in all non-neuronal cell populations, with Pax6, Six1 and Tgif1 also expressed in some neuronal progenitors and precursors; 12 homeobox genes (Adnp, Cux1, Dlx5, Dlx6, Meis2, Pbx2, Pknox1, Pou2f1, Satb1, Tshz1, Tshz3, Zhx2) with expression in both neuronal and non-neuronal cell populations; and one homeobox gene (Hopx) that was exclusively expressed in the non-sensory epithelium...
July 2016: Gene Expression Patterns: GEP
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