Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Online-Ressource
    Online-Ressource
    Wiley ; 2002
    In:  Journal of Neuroscience Research Vol. 68, No. 6 ( 2002-06-15), p. 716-729
    In: Journal of Neuroscience Research, Wiley, Vol. 68, No. 6 ( 2002-06-15), p. 716-729
    Kurzfassung: Transgenic mouse models of Huntington's disease (HD) were examined following the onset of overt behavioral symptoms. The HD transgenic mice demonstrated profound striatal losses in D1, D2, and D3 dopamine (DA) receptor proteins in comparison with their nonsymptomatic, age‐matched littermate controls. In parallel, a robust increase in the striatal D5 DA receptor subtype occurred in the transgenic compared with the wild‐type control mice. This receptor elevation was accompanied by heightened cyclic AMP levels, which may be induced by the adenylyl cyclase‐linked D5 receptor. This is a unique result; normal striatal D5 protein levels are modest and not thought to contribute substantially to cyclic AMP‐mediated DA signaling mechanisms. Simple compensatory up‐regulation of D5 DA receptors in response to D1 receptor subtype loss does not explain our findings, because genetic inactivation of the D1 DA receptor does not alter levels of D5 DA receptor expression. Immunofluorescent detection of tyrosine hydroxylase showed that nigrostriatal DA containing terminals were reduced, further supporting that disturbances in DA signaling occurred in HD transgenic models. The substance P‐containing striatal efferent pathway was more resistant to the HD mutation than met‐enkephalin‐producing striatal projection neurons in the transgenics, based on neuropeptide immunofluorescent staining. Analogous findings in multiple transgenic models suggest that these changes are due to the presence of the transgene and are not dependent on its composition, promotor elements, or mouse strain background. These findings suggest modifications in the striatal DA system and that its downstream signaling through cyclic AMP mechanisms is disrupted severely in HD following onset of motor symptoms. © 2002 Wiley‐Liss, Inc.
    Materialart: Online-Ressource
    ISSN: 0360-4012 , 1097-4547
    URL: Issue
    Sprache: Englisch
    Verlag: Wiley
    Publikationsdatum: 2002
    ZDB Id: 1474904-X
    SSG: 12
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie auf den KOBV Seiten zum Datenschutz