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  • 1
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    Evolution of Vertebrate Phototransduction: Cascade Activation (2016)
    Oxford University Press
    Details
    Publication Date: 2016-07-19
    Description: We applied high-throughput sequencing to eye tissue from several species of basal vertebrates (a hagfish, two species of lamprey, and five species of gnathostome fish), and we analyzed the mRNA sequences for the proteins underlying activation of the phototransduction cascade. The molecular phylogenies that we constructed from these sequences are consistent with the 2R WGD model of two rounds of whole genome duplication. Our analysis suggests that agnathans retain an additional representative (that has been lost in gnathostomes) in each of the gene families we studied; the evidence is strong for the G-protein α subunit (GNAT) and the cGMP phosphodiesterase (PDE6), and indicative for the cyclic nucleotide-gated channels (CNGA and CNGB). Two of the species (the hagfish Eptatretus cirrhatus and the lamprey Mordacia mordax ) possess only a single class of photoreceptor, simplifying deductions about the composition of cascade protein isoforms utilized in their photoreceptors. For the other lamprey, Geotria australis , analysis of the ratios of transcript levels in downstream and upstream migrant animals permits tentative conclusions to be drawn about the isoforms used in four of the five spectral classes of photoreceptor. Overall, our results suggest that agnathan rod-like photoreceptors utilize the same GNAT1 as gnathostomes, together with a homodimeric PDE6 that may be agnathan-specific, whereas agnathan cone-like photoreceptors utilize a GNAT that may be agnathan-specific, together with the same PDE6C as gnathostomes. These findings help elucidate the evolution of the vertebrate phototransduction cascade from an ancestral chordate phototransduction cascade that existed prior to the vertebrate radiation.
    Print ISSN: 0737-4038
    Electronic ISSN: 1537-1719
    Topics: Biology
    Published by Oxford University Press
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  • 2
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    Light pulses that shift rhythms induce gene expression in the suprachiasmatic nucleus (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-06-08
    Description: Lighting cycles synchronize (entrain) mammalian circadian rhythms by altering activity of cells in the suprachiasmatic nucleus (SCN) of the hypothalamus, a circadian pacemaker. Exposure of hamsters and rats to light pulses at those phases of the circadian rhythm during which light can shift the rhythm caused increased immunoreactivity for the product of the immediate-early gene c-fos in cells in the region of the SCN that receives retinal fibers. Light pulses also increased messenger RNA for the Fos protein and for the immediate-early protein NGFI-A in the rat SCN. Similar increases in mRNA for NGFI-A were seen in the SCN of hamsters. Thus cells in this portion of the SCN undergo alterations in gene expression in response to retinal illumination, but only at times in the circadian cycle when light is capable of influencing entrainment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rusak, B -- Robertson, H A -- Wisden, W -- Hunt, S P -- New York, N.Y. -- Science. 1990 Jun 8;248(4960):1237-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, Dalhousie University, Halifax, Nova Scotia, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2112267" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Circadian Rhythm ; Cricetinae ; Darkness ; *Gene Expression ; Light ; Nerve Growth Factors/*genetics ; Proto-Oncogene Proteins/*genetics ; Proto-Oncogene Proteins c-fos ; *Proto-Oncogenes ; RNA, Messenger/*analysis/genetics ; Rats ; Suprachiasmatic Nucleus/*physiology/radiation effects ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Neurokinin 1 receptor antagonism as a possible therapy for alcoholism (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-02-16
    Description: Alcohol dependence is a major public health challenge in need of new treatments. As alcoholism evolves, stress systems in the brain play an increasing role in motivating continued alcohol use and relapse. We investigated the role of the neurokinin 1 receptor (NK1R), a mediator of behavioral stress responses, in alcohol dependence and treatment. In preclinical studies, mice genetically deficient in NK1R showed a marked decrease in voluntary alcohol consumption and had an increased sensitivity to the sedative effects of alcohol. In a randomized controlled experimental study, we treated recently detoxified alcoholic inpatients with an NK1R antagonist (LY686017; n = 25) or placebo (n = 25). LY686017 suppressed spontaneous alcohol cravings, improved overall well-being, blunted cravings induced by a challenge procedure, and attenuated concomitant cortisol responses. Brain functional magnetic resonance imaging responses to affective stimuli likewise suggested beneficial LY686017 effects. Thus, as assessed by these surrogate markers of efficacy, NK1R antagonism warrants further investigation as a treatment in alcoholism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉George, David T -- Gilman, Jodi -- Hersh, Jacqueline -- Thorsell, Annika -- Herion, David -- Geyer, Christopher -- Peng, Xiaomei -- Kielbasa, William -- Rawlings, Robert -- Brandt, John E -- Gehlert, Donald R -- Tauscher, Johannes T -- Hunt, Stephen P -- Hommer, Daniel -- Heilig, Markus -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2008 Mar 14;319(5869):1536-9. doi: 10.1126/science.1153813. Epub 2008 Feb 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Clinical and Translational Studies, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18276852" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; *Alcohol Drinking/drug therapy ; Alcoholism/*drug therapy ; Animals ; Behavior, Addictive/drug therapy ; Brain/drug effects/physiology ; Emotions/drug effects ; Ethanol/administration & dosage/pharmacology ; Female ; Humans ; Hydrocortisone/blood ; Magnetic Resonance Imaging ; Male ; Mice ; Mice, Inbred C57BL ; Middle Aged ; *Neurokinin-1 Receptor Antagonists ; Pyridines/administration & dosage/pharmacology/*therapeutic use ; Receptors, Neurokinin-1/deficiency/genetics/*physiology ; Triazoles/administration & dosage/pharmacology/*therapeutic use
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    The Genome and Methylome of a Subsocial Small Carpenter Bee, Ceratina calcarata (2016)
    Oxford University Press
    Details
    Publication Date: 2016-05-15
    Description: Understanding the evolution of animal societies, considered to be a major transition in evolution, is a key topic in evolutionary biology. Recently, new gateways for understanding social evolution have opened up due to advances in genomics, allowing for unprecedented opportunities in studying social behavior on a molecular level. In particular, highly eusocial insect species (caste-containing societies with nonreproductives that care for siblings) have taken center stage in studies of the molecular evolution of sociality. Despite advances in genomic studies of both solitary and eusocial insects, we still lack genomic resources for early insect societies. To study the genetic basis of social traits requires comparison of genomes from a diversity of organisms ranging from solitary to complex social forms. Here we present the genome of a subsocial bee, Ceratina calcarata . This study begins to address the types of genomic changes associated with the earliest origins of simple sociality using the small carpenter bee. Genes associated with lipid transport and DNA recombination have undergone positive selection in C. calcarata relative to other bee lineages. Furthermore, we provide the first methylome of a noneusocial bee. Ceratina calcarata contains the complete enzymatic toolkit for DNA methylation. As in the honey bee and many other holometabolous insects, DNA methylation is targeted to exons. The addition of this genome allows for new lines of research into the genetic and epigenetic precursors to complex social behaviors.
    Electronic ISSN: 1759-6653
    Topics: Biology
    Published by Oxford University Press
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  • 5
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    Modulation of chemotropism in the developing spinal cord by substance P (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-02-10
    Description: Developing axons find their targets through direct contact with cues in the extracellular environment and in response to gradients of diffusible factors. The floor plate, a neuroepithelial structure, guides developing commissural axons in the spinal cord by release of chemoattractants. Floor plate cells express neurokinin-1 receptors, and a transiently appearing subpopulation of commissural axons contains substance P, the neuropeptide ligand for this receptor. Substance P increases the amount of axon outgrowth from dorsal horn explants cocultured with floor plate explants. Results of experiments with embryonic rats suggest that substance P released from pioneering neuronal pathways may regulate the release of chemoattractants from floor plate cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉De Felipe, C -- Pinnock, R D -- Hunt, S P -- New York, N.Y. -- Science. 1995 Feb 10;267(5199):899-902.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neurobiology, Medical Research Council, Cambridge, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7531367" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Axons/physiology/ultrastructure ; Calcium/metabolism ; Central Nervous System/chemistry/cytology/*embryology/metabolism ; Chemotactic Factors/*metabolism ; Culture Techniques ; Neurons/chemistry/*physiology/ultrastructure ; Rats ; Receptors, Neurokinin-1/analysis/metabolism ; Spinal Cord/cytology/*embryology ; Substance P/analysis/*metabolism/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
    Electronic Resource
    Electronic Resource
    NEUROTENSIN: REGIONAL DISTRIBUTION, CHARACTERIZATION, AND INACTIVATION (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 400 (1982), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1982.tb31570.x
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Inverse relationship between neurotensin receptors and neurotensin-like immunoreactivity in cat striatum (1984)
    [s.l.] : Nature Publishing Group
    Nature 307 (1984), S. 543-546 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Adult male cats received a lethal injection of pentobarbitone; their brains were removed and immersed in ice-cold saline for 10 min. Blocks containing the corpus striatum were frozen and sectioned in the transverse plane at 20 µ?? using a cryostat. Adjacent sections were incubated with either ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/307543a0
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  • 8
    Electronic Resource
    Electronic Resource
    Immunocytochemical localization of glutamic acid decarboxylase in monkey striate cortex (1981)
    [s.l.] : Nature Publishing Group
    Nature 292 (1981), S. 605-607 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Neuronal cell bodies and synaptic terminals positive for glutamic acid decarboxylase, the enzyme responsible for synthesizing γ-amino butyric acid, have been located by immunocytochemical staining in all layers of the macaque monkey cortex. In layers II and III the staining pattern of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/292605a0
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  • 9
    Electronic Resource
    Electronic Resource
    Correlation between inositol phospholipid hydrolysis and substance P receptors in rat CNS (1984)
    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 795-797 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The distribution of specific 3H-substance P-binding sites throughout the rat brain was initially determined. Adult male Sprague-Dawley rats were killed, their brains removed, frozen on dry-ice and 20-??? sections cut using a cryostat in either the horizontal or the coronal plane. They were apposed ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/309795a0
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  • 10
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    Deletion of the mouse RegIII  (Reg2) gene disrupts ciliary neurotrophic factor signaling and delays myelination of mouse cranial motor neurons (2008)
    National Academy of Sciences
    Details
    Publication Date: 2008-08-04
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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