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  • 1
    Online-Ressource
    Online-Ressource
    Cambridge :Cambridge University Press,
    Schlagwort(e): Norepinephrine. ; Electronic books.
    Beschreibung / Inhaltsverzeichnis: Norepinephrine is a chemical neurotransmitter. Noradrenergic drugs have been proven effective for depression and ADHD, and drugs that directly manipulate central nervous system norepinephrine are being developed for new disease indications. This book synthesizes evidence, practice and research to highlight norepinephrine's contribution to disease and therapy.
    Materialart: Online-Ressource
    Seiten: 1 online resource (660 pages)
    Ausgabe: 1st ed.
    ISBN: 9780511272769
    DDC: 612.8042
    Sprache: Englisch
    Anmerkung: Cover -- Half-title -- Title -- Copyright -- Contents -- Contributors -- Acknowledgements and Disclosures -- Introduction: revision of an old transmitter -- Part I The neurobiology of norepinephrine -- 1 Neuroanatomical and chemical organization of the locus coeruleus -- Early history of the locus coeruleus -- Species comparisons -- Ontogeny -- Morphological and ultrastructural characteristics -- Transmitter identity and receptor distribution -- Classical transmitters -- Neuropeptides -- Connections: sources of afferent input to LC -- Retrograde studies -- Anterograde studies -- Ultrastructural examinations -- The LC efferent projection -- Histochemistry and anterograde labeling -- Retrograde labeling -- Chemoarchitecture: neurochemically identified pathways -- Excitatory inputs -- Inhibitory inputs -- Serotonergic inputs -- Dopaminergic, noradrenergic, and adrenergic inputs -- Neuropeptide inputs -- Enkephalin -- Efferent connections -- Overview -- REFERENCES -- 2 Interactions of norepinephrine with other neurotransmitter systems: anatomical basis and pharmacology -- Introduction -- Noradrenergic circuitry: input to the LC -- Serotonin -- Dopamine -- Aminobutyric acid -- Glutamate -- Acetylcholine -- Substance P -- Noradrenergic circuitry: reciprocal output from the LC -- Summary and conclusions -- Acknowledgements -- REFERENCES -- 3 Receptors for norepinephrine and signal transduction pathways -- Introduction -- Adrenergic receptor subtypes -- Historical development -- Characteristics of alpha1-adrenergic receptors -- Pharmacological characteristics of 1-adrenergic receptors -- Molecular characteristics of alpha1-adrenergic receptors -- Regulation of alpha1-adrenergic receptors -- Characteristics of alpha2-adrenergic receptors -- Pharmacological characteristics of alpha2-adrenergic receptors. , Molecular characteristics of alpha2-adrenergic receptors -- Regulation of alpha2-adrenergic receptors -- Characteristics of beta-adrenergic receptors -- Pharmacological characteristics of beta-adrenergic receptors -- Molecular characteristics of beta-adrenergic receptors -- Regulation of beta-adrenergic receptors -- Signal transduction pathways -- Alpha1-adrenergic receptors -- Alpha2-adrenergic receptors -- Beta-adrenergic receptors -- Physiological roles -- Alpha1-adrenergic receptors -- Alpha2-adrenergic receptors -- Subtype specific functions of Alpha2-adrenergic receptors -- Alpha2-adrenergic receptor polymorphisms -- Beta-adrenergic receptors -- Beta1- and Beta2-adrenergic receptors -- Beta1- and Beta2-adrenergic receptor polymorphisms -- Beta3-adrenergic receptors -- Conclusions/summary -- REFERENCES -- 4 Regulation of gene transcription in the central nervous system by norepinephrine -- Introduction -- Fundamental concepts of gene transcription -- Initiation of gene transcription -- Transcription factors -- Noradrenergic receptors couple to multiple signal transduction cascades and transcription factors -- Noradrenergic receptor regulation of the cAMP-CREB cascade -- Activation of alpha1-adrenergic receptors also leads to up-regulation of CREB-mediated gene transcription -- Noradrenergic receptor regulation of AP-1 family transcription factors -- Role of noradrenergic receptor regulation of transcription factors and gene expression in the actions of antidepressant treatment -- Antidepressant treatment up-regulates the cAMP-CREB cascade -- CREB produces antidepressant effects in behavioral models of depression -- CREB increases neurogenesis in adult hippocampus -- Antidepressants and norepinephrine regulation of c-fos gene expression and AP-1 DNA binding -- Regulation of c-Fos and IEG expression by desipramine. , Regulation of c-Fos by stress/NE -- Role of NE-CREB signaling in learning and memory -- Conclusions -- Acknowledgements -- REFERENCES -- 5 The norepinephrine transporter and regulation of synaptic transmission -- Introduction -- The norepinephrine transporter and the importance of norepinephrine uptake -- Molecular structure of norepinephrine transporters -- Localization of the norepinephrine transporter -- Function of the norepinephrine transporter -- Norepinephrine transporter as a drug target -- Mechanism of norepinephrine uptake -- Regulation of norepinephrine uptake -- Acute regulation of neuronal norepinephrine reuptake -- Chronic regulation of neuronal norepinephrine reuptake -- Norepinephrine transporter-associated proteins -- Norepinephrine transporter gene, polymorphisms and splice variants -- Clearance of norepinephrine and aging -- Norepinephrine transport and disease -- Conclusions -- Acknowledgements -- References -- Part II Norepinephrine and behavior -- 6 Role of the locus coeruleus-norepinephrine system in arousal and circadian regulation of the sleep-wake cycle -- Introduction -- Brain systems involved in sleep-wake regulation -- Waking, slow-wave sleep and paradoxical sleep -- Networks involved in regulation of the sleep-wake cycle -- Neuronal groups -- Mechanisms involved in sleep-waking cycle stage changes -- LC involvement in sleep-wake regulation -- Activity ofLC neurons during sleep and waking -- Tonic LC activity varies with behavioral state -- Primate LC activity during sleep and waking -- LC activity and cortical arousal -- Effects of locus coeruleus lesions on sleep and waking -- Spontaneous Sleep -- Sleep Rebound -- Role of corticotropin-releasing factor in noradrenergic regulation of sleep and waking -- Role of LC in circadian regulation of sleep and waking -- Indirect projection from the SCN to the LC. , Circadian rhythm in LC impulse activity -- LC lesions decrease circadian amplitude of sleep--UnicodeCharacterx2013 waking cycle -- Light deprivation-induced loss of cortical NE -- Clinical perspectives: LC participation in sleep alterations due to clinical pathologies -- Depression -- NE and depression -- Stress, depression, CRF, NE-LC system and sleep -- Sleep deprivation and depression -- Anxiety -- Posttraumatic Stress Disorder ( PTSD ) -- Attention-deficit/hyperactivity disorder (ADHD) -- Aging -- Insomnia -- Conclusions -- REFERENCES -- 7 The locus coeruleus and regulation of behavioral flexibility and attention: clinical implications -- Introduction -- Background -- Global efferent projections -- NE modulates activity of neurons in LC target areas -- Tonic LC activity varies with behavioral state -- LC neurons exhibit polymodal sensory responsiveness -- Recent results recording LC neurons in behaving monkeys -- Target detection task -- Phasic activation of LC neurons by meaningful stimuli -- Fluctuations in tonic LC activity during task performance -- Relationship of tonic to phasic LC activity -- Task difficulty -- Interpretation of results-LC neurophysiology experiments -- Computational modeling: simulation of LC activity and task performance -- Stimulus discrimination network -- LC model -- Electrotonic coupling -- Simulation results -- Interpretation of results: modeling experiments -- Decision-related activation of monkey LC neurons -- Forced-choice task -- Phasic activation of the LC preceded the behavioral response -- Influence of prefrontal cortex on activity of LC neurons -- Discussion -- A new theory of LC function -- Relationship of LC function to attention -- Clinical implications -- Hypertonic LC activity: attention-deficit/hyperactivity disorder and posttraumatic stress disorder -- Attention-deficit hyperactivity disorder (ADHD). , Posttraumatic stress disorder (PTSD) -- Hyperphasic LC activity: autism -- Hypotonic LC activity: depression -- Dysregulated LC phasic activity: schizophrenia -- Loss of LC neurons: dementias of Alzheimer's and Parkinson's diseases -- Sleep disorders -- Regulation of LC mode: implications for new pharmacotherapies -- Acknowledgements -- References -- 8 Norepinephrine and long-term memory function -- Introduction -- Role of adrenergic catecholamines in memory consolidation -- Amphetamine effects on memory consolidation -- Peripheral epinephrine and norepinephrine effects on memory consolidation -- Role of brainstem noradrenergic cell groups in memory consolidation -- Pharmacological and genetic evidence of central norepinephrine in regulating long-term memory consolidation -- Norepinephrine in the amygdala and memory consolidation -- Selective involvement of the basolateral complex of the amygdala -- Stress- and training-induced norepinephrine release in the amygdala and memory consolidation -- Involvement of beta-adrenoceptors and alpha-adrenoceptors in mediating norepinephrine effects on memory consolidation -- Electrophysiological and molecular events in the amygdala induced by noradrenergic activation -- Role of norepinephrine in the amygdala in regulating memory processes in other brain regions -- Interactions of the amygdala noradrenergic system with other neuromodulatory systems on memory consolidation -- Glucocorticoid hormones -- Opioid peptidergic system -- GABA ergic system -- Cholinergic system -- Effects of norepinephrine in other brain regions on memory consolidation -- Hippocampus/entorhinal cortex -- Medial prefrontal cortex -- Insular cortex -- Norepinephrine effects on memory in human subjects -- Summary -- Acknowledgements -- References -- 9 Norepinephrine and stress -- Introduction. , Elevation of tonic noradrenergic neurotransmission with arousal.
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Environmental geology 39 (2000), S. 1117-1126 
    ISSN: 1432-0495
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract Water from the Kombat mine was delivered to the Omatako dam via the 263-km-long Grootfontein-Omatako canal during test runs in 1997. It is intended to supply water from Kombat and other underground mines in the Otavi Mountain Land to the capital Windhoek. The Cu-Pb-Zn orebodies are hosted by carbonate rocks and the mine waters are supersaturated with respect to calcite and CO2. Along the length of the canal, the CO2 partial pressure drops from 10−2.1 atm at the inlet of the Kombat mine to 10−3.5 atm at the end of the canal. This is accompanied by a drop in Ca concentration from about 60 to about 20 mg/l. The heavy metal concentrations (Cd, Cu, Mn, Pb and Zn) drop along the course of the canal to values far below the national drinking-water standard. Scavenging by calcium carbonate precipitation is the major depletion mechanism.
    Materialart: Digitale Medien
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Conservation genetics 1 (2000), S. 285-288 
    ISSN: 1572-9737
    Schlagwort(e): felids ; hair snags ; lynx ; Lynx canadensis ; mitochondrial DNA ; non-invasive sampling ; species inventory and monitoring
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Mineralium deposita 21 (1986), S. 1-11 
    ISSN: 1432-1866
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract The Conolly diagram is a section or plan on which the distances from the vein to an arbitrary reference plane are contoured. This graphical technique makes it possible to depict the shape of the vein in a form which resembles topographic contour maps. The Conolly diagram can be used to analyse the relation between oreshoot development in fault-related veins, the attitude of the irregular fault plane and slip direction of the fault. A new graphical discrimination method has been developed by which an apparent-slip direction “b” is determined in the Conolly diagram by comparing the variations in attitude of the vein with the variations in thickness of the corresponding fissure opening. Theoretically, ore shoots in dextral faults are located where the acute angle “α” between the apparent-slip direction “b” and the fault surface is smaller than zero and in sinistral faults where “α” is greater than zero. This method of interpretation is especially useful when analysing obliqueslip fault systems, which are difficult to study because of the complexities of the three-dimensional problem.
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Pharmaceutical research 4 (1987), S. 83-85 
    ISSN: 1573-904X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    ISSN: 1573-904X
    Schlagwort(e): catalysis ; zinc ion ; hydrolysis ; aminolysis ; cephalosporins
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Earlier studies of the hydrolysis and aminolysis of penicillin, in the presence of zinc ion and tromethamine (Tris), revealed a very rapid catalysis mediated by a ternary complex in which the metal ion brought the reactants into close proximity in a suitable configuration for reaction. In the present work similar studies with a group of cephalosporins show not only much slower rates of reaction but a different mechanism in which the zinc ion–tromethamine complex functions as a nucleophile in a bimolecular reaction. Evidence for the differences in mechanism includes not only the different dependence of rate upon tromethamine concentration, but comparable rates of reaction of methyl esters of a penicillin and a cephalosporin and the reaction products observed by high-performance liquid chromatography.
    Materialart: Digitale Medien
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  • 7
    ISSN: 1573-904X
    Schlagwort(e): lovastatin ; simvastatin ; sustained-release dosage forms ; 3-hydroxy-3-methylglutaryl–coenzyme A (HMG-CoA) reductase inhibitors ; dog ; humans
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Seven sustained/controlled-release dosage forms were designed for gastrointestinal delivery of lovastatin or simvastatin, two potent HMG-CoA reductase inhibitors for the treatment of hypercholesterolemia. The in vivo performance of these formulations was evaluated in dogs and healthy volunteers in terms of the cholesterol lowering efficacy and/or systemic concentrations of HMG-CoA reductase inhibitors. Results from the present and previous studies suggest that, through the controlled release of HMG-CoA reductase inhibitors, sustained lower plasma concentrations of HMG-CoA reductase inhibitors may result in an equal or better therapeutic efficacy.
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Behavior genetics 6 (1976), S. 367-368 
    ISSN: 1573-3297
    Schlagwort(e): identical twins ; separated twins ; distribution ; heritability
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Psychologie
    Notizen: Abstract Jensen's claim that the twins from the four studies of separated identical twins come from the same population is shown to be wrong. The consequences of this are briefly discussed.
    Materialart: Digitale Medien
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Journal of science education and technology 2 (1993), S. 565-584 
    ISSN: 1573-1839
    Schlagwort(e): CALL ; CALI ; CAI ; communication ; computers ; electronic mail ; foreign language teaching and learning ; networks ; networking ; task-based learning
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Allgemeine Naturwissenschaft , Technik allgemein
    Notizen: Abstract From 1988 to 1990 several collaborative “cross-country” intermediate French classes at Harvard and Stanford became one class. Students combined their efforts and insights in the accomplishment of a semester-long task, in most cases the publication of a student newspaper or magazine, using the electronic mail (e-mail) network to contact each other, elaborate their plans, and bring their projects to successful conclusion. Additional experiments of a similar nature took place between Harvard and the University of Pittsburgh (in the spring of 1990) and between Stanford and the University of Pittsburgh during 1991–1993. This paper suggests that this type of task-oriented learning through distance-communication is applicable at many different course levels and has considerable merit as an approach to teaching and learning. The key phases of this task-based model are presented along with technological information regarding computers and networks, as a guide to colleagues interested in pursuing similar lines of experimental teaching. Also included are samples of student messages, with their varied and often highly colorful discourse features, which attest to the motivation of students and reveal the strong personal investment made by the participants as they join hands across the miles in a productive, communication-based enterprise. The language and learning styles generated by technology and computers fully deserve closer investigation by researchers and teaching practitioners alike. The authors summarize the experiments, discuss assessment, and present research issues, concluding that good pedagogy and quality technology must share a vision of what can be accomplished in this rapidly evolving educational work place.
    Materialart: Digitale Medien
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  • 10
    ISSN: 1615-5947
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We performed bilateral femoral artery dissections in a single 50 kg mongrel dog. Digital fluoroscopic arteriograms documented the luminal diameter of the left iliac and right superficial femoral arteries. Balloon thrombectomy catheter passage was performed through hemostatic sheaths by 12 surgeons. Embolectomy balloons were filled with radiographic contrast material and the balloon catheter diameter was compared with the underlying vessel diameter. The percentage of overdistention of the embolectomy balloon relative to the arterial wall was 23%±5% in the iliac artery and 40%±13% in the femoral artery. Over a 25-month period, we used fluoroscopically assisted thromboembolectomy to treat 21 patients with acute arterial or graft occlusions. As the balloon was gently withdrawn to extract intravascular thrombus, deformities of the compliant balloon profile caused by underlying arterial lesions were identified fluoroscopically and their locations recorded to facilitate further treatment. After initial clot removal in these 21 patients, 15 residual lesions were documented. Repeat thrombectomy (n=8), balloon angioplasty (n=3), and placement of intravascular stents (n=4) eliminated all 15 lesions. Luminal continuity was successfully restored in all 21 of these patients, 10 of whom required distal open vascular reconstruction to correct existing outflow artery disease. Fluoroscopically assisted thromboembolectomy is a simple and safe method for treating acute arterial or graft occlusions in patients with diffuse arteriosclerosis. It minimizes arterial damage and blood loss during balloon thrombectomy and reduces the need for intravascular contrast agents. It also has the potential to facilitate accurate identification, localization, and treatment of significant underlying arterial lesions.
    Materialart: Digitale Medien
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