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  • 1
    Keywords: Vasopressin. ; Oxytocin. ; Electronic books.
    Description / Table of Contents: Vasopressin and oxytocin are the key hormones of the hypothalamo-neurohypophysial system, and are well-known to be critically involved in antidiuresis, labor, and milk ejection. This book highlights the latest research on vasopressin and oxytocin, covering multiple biological aspects. The capacity of both hormones to regulate various aspects of social behaviours including pair-bonding, aggression, maternal love, and sexual behaviour, is a main focus, as are their interactions with a variety of other neuromodulators and transmitters. Moreover, the book illustrates the recent development of vasopressin and oxytocin agonists/antagonists as potential drugs to treat not only disturbances of body fluid homeostasis, but also mental disorders, including social phobia, autism, anxiety, and depression. The promising combination of basic and clinical research, comprising physiology, neuroendocrinology, behavioral biology, pharmacology, imaging and molecular genetics makes this book an essential addition to both experts and scientists new to the field alike. Comprehensive review of OXT and AVP physiology and behaviour Each chapter covers a novel aspect of OXT and AVP research and is written by a leading expert Review articles are ideal for experts and newcomers to the field alike Discusses fascinating behavioural effects of oxytocin and vasopressin Summarizes the recent explosion of neuropeptide research, physiology and behaviour, is in one location.
    Type of Medium: Online Resource
    Pages: 1 online resource (657 pages)
    Edition: 1st ed.
    ISBN: 9780080932477
    Series Statement: Issn Series ; v.Volume 170
    DDC: 612.492
    Language: English
    Note: Cover -- Advances in vasopressin and oxytocin - from genes to behaviour to disease -- Copyright -- List of Contributors -- Preface -- Acknowledgements -- Contents -- Section I. Vasopressin and Oxytocin in Evolution, Sexual Dichotomy and Stress -- Chapter 1. Nonapeptides and the evolutionary patterning of sociality -- Abstract -- Nonapeptides and the patterning of behaviour -- Deep history of the nonapeptides -- Evolution of central nonapeptide circuits: anatomical and behavioural basics -- Evolutionary plasticity of nonapeptide systems generates social diversity -- Vasotocin and the evolution of avian sociality -- Sociality and septal neuropeptides: what is being modulated? -- Neuromodulatory patterning: overlapping circuits and distinct behavioural states -- Summary -- Abbreviations -- Acknowledgement -- References -- Chapter 2. Sex differences in vasopressin and oxytocin innervation of the brain -- Abstract -- Introduction -- Causes of sex differences in AVP projections -- Effects of circulating hormones in adulthood -- Oestrogen versus androgen effects -- Hormones and sex differences in AVP expression -- Sex chromosomes in sex differences in AVP expression -- Cellular mechanisms underlying differentiation of AVP expression -- The origin of sexually dimorphic AVP innervation -- Sex differences in other AVP systems -- Function of sex differences in AVP expression -- Lessons from spotted hyenas and prairie voles -- Dual function for sex differences in the brain -- Clinical implications -- Abbreviations -- Acknowledgement -- References -- Chapter 3. The parvocellular vasopressinergic system and responsiveness of the hypothalamic pituitary adrenal axis during chronic stress -- Abstract -- Introduction -- Conclusions -- Acknowledgement -- References -- Section II. Genetics Meets Behaviour. , Chapter 4. Experimental approaches for the study of oxytocin and vasopressin gene expression in the central nervous system -- Abstract -- Introduction -- Materials and methods -- Results -- Discussion -- Abbreviations -- Acknowledgements -- References -- Chapter 5. Oxytocin knockout mice: a model for studying stress-related and ingestive behaviours -- Abstract -- Introduction -- Methods -- Experiments -- Summary and implications of findings and future directions -- Abbreviations -- References -- Chapter 6. The role of the vasopressin 1b receptor in aggression and other social behaviours -- Abstract -- Introduction -- Avpr 1b and aggression -- Avpr 1b and social memory -- Avpr 1b and social motivation -- Conclusions -- Abbreviations -- Acknowledgement -- References -- Chapter 7. Behavioural studies using temporal and spatial inactivation of the oxytocin receptor -- Abstract -- Introduction -- Oxt and Oxtr knockout mice -- Behavioural analysis using conditional knockout mice -- Phenotypical implication of Oxtr conditional knockout mice -- Future directions -- Abbreviations -- Acknowledgement -- References -- Chapter 8. New aspects of oxytocin receptor function revealed by knockout mice: sociosexual behaviour and control of energy balance -- Abstract -- Oxytocin and oxytocin receptor -- Generation of oxytocin deficient (Oxt-/-) mice -- Generation of oxytocin receptor deficient (Oxtr-/-) mice -- Generation of Oxtr-Venus knockin mice to locate ''Oxtr-Neurons'' -- Abbreviations -- Acknowledgements -- References -- Section III. Regulation of Vasopressin and Oxytocin Release -- Chapter 9. Regulation of vasopressin release by co-released neurotransmitters: mechanisms of purinergic and adrenergic synergism -- Abstract -- Introduction -- Mechanism of ATP+PE synergism -- Remaining issues and new hypotheses -- Acknowledgements -- References. , Chapter 10. Neuron-glia interactions in the rat supraoptic nucleus -- Abstract -- Introduction -- Diffusion properties in the SON -- Glial contribution to glutamatergic and GABAergic transmission in the SON -- Gliotransmission in the SON and modulation of NMDA receptors -- Conclusions -- Abbreviations -- Acknowledgements -- References -- Chapter 11. Dynamic synapses in the hypothalamic-neurohypophyseal system -- Abstract -- Synaptic physiology of glutamate synapses on MNCs -- Mechanisms responsible for asynchronous release in PVN -- Evoked glutamate release and the regulation of MNC activity -- Conclusions -- Acknowledgements -- References -- Chapter 12. Endogenous modulators of synaptic transmission: cannabinoid regulation in the supraoptic nucleus -- Abstract -- Introduction -- The cannabinoid system in the SON -- Future perspectives -- Abbreviations -- References -- Chapter 13. Oxytocin and appetite -- Abstract -- Introduction -- Oxytocin and oxytocin-like peptides throughout evolution -- Interactions between feeding and sex -- Regulation of feeding in mammals -- Oxytocin and sexual behaviour -- The ventromedial nucleus of the hypothalamus (VMH) -- Peptides and behaviour -- Acknowledgements -- References -- Section IV. Nonapeptide Receptors: Regulation and Signalling -- Chapter 14. Neural mechanisms underlying the milk ejection burst and reflex -- Abstract -- Introduction -- Structural considerations: the SON -- Functional studies of milk ejection bursts and the MER -- Functional studies of milk ejection bursts and the MER -- Cellular mechanisms underlying OXT-induced excitation -- Concluding remarks -- Abbreviations -- Acknowledgements -- References -- Chapter 15. Oxytocin receptor signalling -- Abstract -- General thoughts on oxytocin receptor signalling -- Novel OXTR signalling target: eEF2 -- Novel OXTR-linked signalling pathway: ERK5. , In vitro contraction assay -- Conclusions -- Abbreviations -- Acknowledgement -- References -- Chapter 16. Neurosteroids are excitatory in supraoptic neurons but inhibitory in the peripheral nervous system: it is all about oxytocin and progesterone receptors -- Abstract -- Introduction -- Neurosteroids: a new class of neuromodulators -- Non-genomic effects of progestins -- GABAA and free cytosolic Ca2+: a developmental pas-de-deux -- Development of the nervous system -- Physiological relevance of the models -- Neuroactive steroid-signalling pathways -- Conclusion -- Abbreviations -- Acknowledgements -- References -- Chapter 17. Oxytocin receptors: ligand binding, signalling and cholesterol dependence -- Abstract -- Oxytocin -- Oxytocin receptors -- Oxytocin receptor research: quo vadis? -- Abbreviations -- Acknowledgements -- References -- Section V. Neuronal Actions of Nonapeptides -- Chapter 18. Opposite effects of oxytocin and vasopressin on the emotional expression of the fear response -- Abstract -- Introduction -- Conclusions and perspectives -- Abbreviations -- Acknowledgements -- References -- Chapter 19. Multi-factorial somato-dendritic regulation of phasic spike discharge in vasopressin neurons -- Abstract -- Phasic spike discharge patterning in vasopressin neurons -- Somato-dendritic neuropeptide release from vasopressin neurons -- Autocrine modulation of phasic spike discharge by somato-dendritic vasopressin release -- Autocrine modulation of phasic spike discharge by co-released neuropeptides -- Autocrine modulation of phasic spike discharge by other factors -- Conclusion -- Abbreviations -- Acknowledgements -- References -- Chapter 20. Neurophysiology of supraoptic neurons in C57/BL mice studied in three acute in vitro preparations -- Abstract -- Introduction -- Methods -- Results -- Discussion -- Abbreviations -- Acknowledgements. , References -- Chapter 21. Effects of oxytocin on GABA signalling in the foetal brain during delivery -- Abstract -- GABA in the immature brain -- Perinatal switch in the action of GABA from excitatory to inhibitory -- Involvement of oxytocin in the perinatal GABA switch -- Source of oxytocin in a slice preparation -- Origin of oxytocin in the foetal brain: maternal or foetal? -- Oxytocin and NKCC1 -- Oxytocin as neuroprotector in perinatal hypoxia -- Concluding remarks -- Abbreviations -- Acknowledgements -- References -- Section VI. Regulation of Social Behaviours -- Chapter 22. Central vasopressin and oxytocin release: regulation of complex social behaviours -- Abstract -- Introduction -- Monitoring of local release of AVP and OXT during social behaviour by intracerebral microdialysis -- Behavioural relevance of local neuropeptide release within target brain regions -- Conclusions -- Abbreviations -- Acknowledgements -- References -- Chapter 23. Interactions between dopamine and oxytocin in the control of sexual behaviour -- Abstract -- Introduction -- Hypothalamic nuclei mediating reproductive behaviours -- The role of oxytocin -- The role of dopamine -- Dopamine-oxytocin link -- Signalling pathways -- Conclusion -- Abbreviations -- Acknowledgements -- Reference -- Chapter 24. Steroidal/neuropeptide interactions in hypothalamus and amygdala related to social anxiety -- Abstract -- Introduction -- ERα compared to ERβ -- Social recognition and autism -- E/OT interactions -- A functional genomic network supporting social recognition -- Generalized CNS arousal mechanisms related to fear -- Hyperarousal fostering social anxiety -- Social anxiety fostering autism -- References -- Chapter 25. Functional magnetic resonance imaging and the neurobiology of vasopressin and oxytocin -- Abstract -- Introduction -- Imaging conscious animals. , Imaging aggressive motivation and the role of vasopressin neurotransmission.
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  • 2
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Circumventricular organs -- Congresses. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (511 pages)
    Edition: 1st ed.
    ISBN: 9780080862163
    Series Statement: Issn Series
    Language: English
    Note: Front Cover -- Circumventricular Organs and Brain Fluid Environment: Molecular and Functional Aspects -- Copyright Page -- Contents -- List of Contributors -- Preface -- Acknowledgements -- Section I: Microenvironment of the Brain: Blood … Interstitial Fluid … CSF -- Chapter 1. A role for centrally-released vasopressin in brain ion and volume regulation: a hypothesis -- Chapter 2. Neuronal plasticity depending on a glycoprotein synthesized in goldfish leptomeninx -- Chapter 3. Goldfish ependymins: cerebrospinal fluid proteins of meningeal origin -- Chapter 4. Effect of central administration of angiotensin II on cerebrospinal fluid formation in rabbits -- Chapter 5. Adrenalectomy aggravates ischemic brain edema in female Sprague-Dawley rats with carotid arteries ligated -- Chapter 6. Central release of vasopressin: stimuli, dynamics, consequences -- Chapter 7. Pregnancy and opioid interactions with the anterior peri-third ventricular input to magnocellular oxytocin neurones -- Chapter 8. Endogenous opioids regulate intracerebral oxytocin release during parturition in a region-specific manner -- Chapter 9. Evidence against participation of V2 receptors in the increase of cerebral blood flow during hypoxemia in the rat -- Chapter 10. ANF-induced modulation of ADH-release in the rabbit and Pekin duck -- Chapter 11. Vasopressin involvement in central control of blood pressure -- Chapter 12. Neuropeptides within the nucleus tractus solitarii modulate the central cardiovascular control process -- Chapter 13. Disturbances of volume regulation in chronic alcoholics: a correlation with the excitability of the central nervous system -- Chapter 14. Chromatographically identified oxytocin in the human peripheral nervous system -- Chapter 15. Central effects of tricyclic compounds on the endocrine system … an in vitro study. , Section II: Barriers within the Brain: Transport … Exchange -- Chapter 16. Intracerebral grafting of solid tissues and cell suspensions: the blood-brain barrier and host immune response -- Chapter 17. Blood-brain barrier: a molecular approach to its structural and functional characterization -- Chapter 18. Development of an in vitro cell culture system to mimic the blood-brain barrier -- Chapter 19. The development of ion regulation at the blood-brain barrier -- Chapter 20. An approach to study of transport of trace metals at the blood-brain barrier -- Chapter 21. Bidirectional passage of peptides across the blood-brain barrier -- Chapter 22. Localization patterns for immunoglobulins and albumins in the brain suggest diverse mechanisms for their transport across the blood-brain barrier (BBB) -- Chapter 23. Peptide receptors of the blood-brain barrier and substrate transport into the brain -- Chapter 24. The interaction of some centrally active drugs with the blood-brain barrier and circumventricular organs -- Chapter 25. Experimental models of altering the blood-brain barrier -- Chapter 26. Regulation of transendothelial transport in the cerebral microvessels: the role of second messengers-generating systems -- Chapter 27. Age-related pathophysiology of the blood-brain barrier in heat stress -- Chapter 28. Release of endogenous neurochemicals may increase vascular permeability, induce edema and influence cell changes in trauma to the spinal cord -- Chapter 29. Tracer uptake by circumventricular organs … a relative measure of blood supply to the brain -- Chapter 30. Density of perfused capillaries in living human brain during functional activation -- Section III: Circumventricular Organs: Receptors and Effectors -- Chapter 31. Circumventricular organ capillaries -- Chapter 32. Signals indicative of metabolic change in circumventricular organs. , Chapter 33. Somatostatin-binding sites on structures of circumventricular organs1 -- Chapter 34. Atrial natriuretic factor in the subfornical organ and the organum vasculosum laminae terminalis -- Chapter 35. Neurotransmitters and receptors in the subfornical organ. Immunohistochemical and electrophysiological evidence -- Chapter 36. Steroid hormones and circumventricular organs -- Chapter 37. Choroid plexus, ependyma and arachnoidea express receptors for vitamin D: differences between "seasonal" and "non-seasonal" breeders -- Chapter 38. Receptor and effector mechanisms in the pineal organ -- Chapter 39. Cytochemistry of CSF-contacting neurons and pinealocytes -- Chapter 40. Comparative ultrastructure and opsin immunocytochemistry of the retina and pineal organ in fish -- Chapter 41. Circadian rhythm and pharmacologic regulation of the monodeiodination of 3,3' ,5,5 ' -tetraiodothyronine in the pineal gland -- Chapter 42. Response of CFU-GM (colony forming units for granulocytes and macrophages) from intact and pinealectomized rat bone marrow to murine recombinant interleukin-3 (rII-3), recombinant granulocyte-macrophage colony stimulating factor (rGM-CSF) and hBOOKMARK -- Chapter 43. Immunocytochemical demonstration of serotonin immunoreactive cerebrospinal fluid-contacting neurons in the paraventricular organ of pigeons and domestic chickens -- Chapter 44. The bovine subcommissural organ: cytochemical and immunochemical characterization of the secretory process -- Chapter 45. Developmental neuron-glia interactions: role of serotonin innervation upon the differentiation of the ependymocytes of the rat subcommissural organ -- Chapter 46. Development of the median eminence during ontogenesis (morpho- functional aspects) -- Chapter 47. Neuro-hemal and neuro-glial specificities in the neural lobe of the pituitary gland. , Chapter 48. Non-vasopressinergic, non-oxytocinergic neuropeptides in the rat hygothalamo-neurohypophyseal tract: experimental immunohistochemical studies -- Chapter 49. Drug metabolizing enzymes in the rat pituitary gland -- Section IV: Circumventricular Organs and Brain Fluids: Systemic and Behavioral Aspects -- Chapter 50. Integrative mechanisms and the maintenance of cardiovascular and body fluid homeostasis: the central processing of sensory input derived from the circumventricular organs of the lamina terminalis -- Chapter 51. Efferent neural pathways of the lamina terminalis subserving osmoregulation -- Chapter 52. The role of OVLT in fever and antipyresis -- Chapter 53. Role of the OVLT in the febrile response to circulating pyrogens -- Chapter 54. Neurophysiological analysis of mechanisms for subfornical organ and area postrema involvement in autonomic control -- Chapter 55. Functional hypothalamic angiotensin II and catecholamine receptor systems inside and outside the blood-brain barrier -- Chapter 56. Progressive increases of protein synthesis in the circumventricular organs during chronic dehydration in rats -- Chapter 57. Aspects of normal cerebrospinal fluid circulation and circumventricular organs -- Chapter 58. Effects of vasoactive intestinal polypeptide on choroid plexus blood flow and cerebrospinal fluid production -- Chapter 59. Effect of arginine vasopressin on blood vessels of the perfused choroid plexus of the sheep -- Chapter 60. Neuropeptides in the cerebrospinal fluid and regulation of behavior -- Chapter 61. Neurohypophyseal hormone receptors: relation to behavior -- Chapter 62. The human hypothalamus in development, sexual differentiation, aging and Alzheimer's disease -- Subject Index.
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Journal of neurochemistry 64 (1995), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Recent studies have shown that the neuropeptides arginine-8-vasopressin (AVP) and oxytocin (OXT) are released within the supraoptic (SON) and paraventricular (PVN) nuclei of the hypothalamus in response to microdialysis of these nuclei with high-NaCl perfusion media. These results suggest an inherent osmosensitivity of SON and PVN neurons. To investigate whether the observed release of AVP/OXT is a unique phenomenon to these neuropeptides, several brain regions were examined for the release of amino acids or dopamine in response to high- or low-NaCl stimulation. Urethane-anesthetized male Sprague-Dawley rats were perfused with five-ion solution using U-shaped microdialysis probes. Samples were collected at 30-min intervals and analyzed for amino acids and dopamine by HPLC. In the dialysates of all perfusion areas, including the SON, PVN, hippocampus, and striatum, concentrations of Asp, Glu, Ser, Gln, Gly, taurine (Tau), and γ-aminobutyric acid (GABA) were significantly increased during perfusion with high-NaCl medium. This release was found to be dose dependent when tested in the hippocampus and striatum with perfusion medium containing 0.5 or 1.0 M NaCl. However, only the release of Glu and Ser was found to be Ca2+ dependent. In contrast, the use of mannitol, a nonionic osmolyte, for perfusions in the striatum in concentrations of 0.5 and 1 M resulted in reduced levels of amino acids in the dialysates (Glu, Ser, Gln, and Tau). Low-NaCl perfusion medium (0.01 M) resulted in significantly increased Glu, Tau, Gly, and GABA levels in the striatum. In addition, dopamine levels in striatal dialysates were significantly increased during stimulation with 1 M NaCl. These results indicate that stimulation with high NaCl concentrations affects the release of several neurotransmitters and is not specific for AVP and OXT. The described phenomenon of the release of amino acids in response to this stimulation seems to be a response to the changed ionic concentration rather than to the osmolality. In light of these findings shown for amino acids and dopamine as well as those previously reported for AVP, OXT, and angiotensin, it would appear that sensitivity to tonicity changes brought about by microdialysis may be a feature of many transmitter systems.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Disturbances in serotonergic neurotransmission have been suggested to be closely interlinked with hyperactivity of the hypothalamic-pituitary-adrenocortical (HPA) system, and are likely to be involved in the pathophysiology of anxiety disorders and major depression. We therefore investigated markers of serotonergic transmission and their modulation by chronic paroxetine in rats selectively bred for high (HAB) or low (LAB) anxiety-related behaviour, both under basal conditions and in response to emotional stress. Hippocampal serotonin 1 A (5-HT1A) receptor mRNA expression was reduced in HAB rats, whereas 5-HT concentrations in hippocampal microdialysates did not differ between HAB and LAB rats under basal conditions. In the hippocampus, overall expression of serotonin transporter binding sites was increased in HAB compared with LAB rats. Exposure to emotional stress failed to increase intrahippocampal 5-HT release in HAB rats whereas LAB rats displayed a physiological, albeit small rise. Chronic paroxetine treatment markedly increased the stress-induced rise in hippocampal 5-HT in HAB, but not LAB rats. This effect may be (at least in part) related to a greater down-regulation of hippocampal serotonin transporter binding sites by paroxetine in HABs compared with LABs, while 5-HT1A receptor expression remained unaffected in this brain area. The findings indicate reduced hippocampal serotonergic transmission in HAB rats as compared with LAB rats, which is evident both at the presynaptic (5-HT release) and the postsynaptic (5-HT1A receptor) level. Chronic paroxetine enhanced the presynaptic responsivity in HAB rats, but not LAB rats, pointing to a preferential efficacy of paroxetine in rats with enhanced anxiety/depression-related behaviour.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neuroendocrinology 7 (1995), S. 0 
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Oxytocin is released within the supraoptic nucleus during parturition and suckling. During suckling, such release is important in positive feedback stimulation of oxytocin neurons. We have investigated whether oxytocin released within this hypothalamic nucleus during parturition (1) acts on local receptors to further amplify its own release in a positive feedback manner and (2) is critically involved in the regulation of the delivery process.  To examine the effect of the oxytocin antagonist on oxytocin release within the supraoptic nucleus, microdialysates were sampled before and during parturition and either vehicle or the antagonist was infused adjacent to the microdialysis probe directly into the supraoptic nucleus after delivery of the second pup. Intranuclear infusion of an oxytocin receptor antagonist (des-Gly-NH2d(CH2)5[Tyr(Me)2Thr4]OVT; 50 ng/0.5 μl) significantly (P〈0.01) diminished the parturition-related rise in oxytocin release within the supraoptic nucleus and reduced the number of pups delivered during the first and second 30-min dialysis period compared to vehicle-treated controls.  Bilateral infusion of the oxytocin receptor antagonist into the supraoptic nucleus after delivery of the second pup significantly slowed parturition (P〈0.05), although the parturition-related rise in plasma oxytocin concentration was unchanged. In addition, the onset of suckling was significantly affected by the antagonist as indicated by fewer live pups and fewer surviving pups with milk in their stomachs 24 hours after parturition (P〈0.05).  To seek other, periventricular sites of oxytocin action during parturition, oxytocin or the oxytocin antagonist was infused into the lateral cerebral ventricle from the birth of pup 2. Via this route, oxytocin speeded up parturition, but the antagonist was ineffective; thus it appears that periventricular oxytocin-sensitive sites are not normally active in promoting parturition, but can do so.  The findings indicate a receptor-mediated positive feedback action of oxytocin on its own release within the supraoptic nucleus during parturition, which seems to be involved in the progress of parturition without significantly affecting circulating oxytocin levels. Oxytocin released within the supraoptic nucleus might be important for the coordinated activation of oxytocin neurons and for the synergistic central and peripheral oxytocin effects involved in the regulation of parturition-related events necessary for the survival of the newborn, including the onset of lactation.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Impaired cognitive function and enhanced activity of the hypothalamic-pituitary-adrenocortical system are among the cardinal symptoms of major depression in humans that resolve after successful antidepressant treatment. We used a transgenic mouse model expressing antisense RNA complementary to that of glucocorticoid receptor (GR) mRNA to test the hypothesis that reduced GR function can cause these clinical disturbances. The transgenic mice show profound behavioural changes in a number of animal tests that are indicative of cognitive impairment. These mice also have elevated plasma corticotropin concentrations in response to stress. After long-term treatment with moclobemide, a reversible inhibitor of monoamine oxidase type A that acts clinically as an antidepressant, both the behavioural deficits and the hormonal alterations disappeared. These observations suggest that a transgenic mouse with GR dysfunction may be a useful model for investigation of drug effects on the cognitive and neuroendocrine aspects of depression.
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neuroendocrinology 1 (1989), S. 0 
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The central release of both oxytocin and vasopressin within the septum and dorsal hippocampus in response to suckling was studied in conscious, freely-behaving lactating rats. Three consecutive 30-min push-pull perfusions were carried out before, during and after suckling (suckled group) or without suckling (control group). As compared to control levels, suckling resulted in a significantly increased oxytocin release within both limbic brain areas (septum: to 140%, dorsal hippocampus: to 1,600%). After removal of the suckling pups, the oxytocin concentration in the final perfusates remained at the stimulation level (septum) or tended to return to control values (dorsal hippocampus). In contrast to oxytocin, the vasopressin perfusate levels did not differ significantly between unsuckled and suckled rats.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The purpose of this study was to downregulate the transcriptiona message of arginine vasopressin (AVP) by antisense treatment. A complete phosphorothioate antisense oligodesoxynucleotide corresponding to the beginning of the coding region of rat AVP mRNA was constructed and injected into the lateral ventricle of rats. Within 3–6 h animals exhibited a temporary diabetes insipidus, which lasted up to 9 h. Accordingly, vasopressin immunoreactivity in the hypothalamic nuclei was reduced. Our results demonstrate that a specific and reversible inhibition of neuropeptide expression can be accomplished in the intact hypothalamo-neurohypophysial system by antisense treatment, thus providing a novel tool for studies on stimulus-secretion coupling in vivo.
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neuroendocrinology 6 (1994), S. 0 
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Vasopressin (VP) and oxytocin (OT) are released within the hypothalamic nuclear region in response to direct microdialysis with hypertonic solutions. Experiments were performed to determine whether systemic osmotic stimulation causes changes in intranuclear peptide release within the supraoptic nucleus (SON). A hypertonic sodium chloride solution was injected intraperitoneally (ip) or intravenously (iv) and microdialysis techniques were used to simultaneously monitor central and peripheral peptide release in urethane anesthetized rats. Systemic osmotic stimuli elicited increases in intranuclear peptide release which were delayed and long-lasting, occurring over a 2.5 h period. In contrast, plasma peptide levels peaked at 30-min after the stimulus. The results demonstrate that increased plasma sodium elicits an increase in VP and OT release into the extracellular space of the hypothalamic SON. The different patterns of peptide release in plasma and brain point toward the possibility of independently regulated release into the different compartments.
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