32 research outputs found

    Calbindin-D32k Is Localized to a Subpopulation of Neurons in the Nervous System of the Sea Cucumber Holothuria glaberrima (Echinodermata)

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    Members of the calbindin subfamily serve as markers of subpopulations of neurons within the vertebrate nervous system. Although markers of these proteins are widely available and used, their application to invertebrate nervous systems has been very limited. In this study we investigated the presence and distribution of members of the calbindin subfamily in the sea cucumber Holothuria glaberrima (Selenka, 1867). Immunohistological experiments with antibodies made against rat calbindin 1, parvalbumin, and calbindin 2, showed that these antibodies labeled cells and fibers within the nervous system of H. glaberrima. Most of the cells and fibers were co-labeled with the neural-specific marker RN1, showing their neural specificity. These were distributed throughout all of the nervous structures, including the connective tissue plexi of the body wall and podia. Bioinformatics analyses of the possible antigen recognized by these markers showed that a calbindin 2-like protein present in the sea urchin Strongylocentrotus purpuratus, corresponded to the calbindin-D32k previously identified in other invertebrates. Western blots with anti-calbindin 1 and anti-parvalbumin showed that these markers recognized an antigen of approximately 32 kDa in homogenates of radial nerve cords of H. glaberrima and Lytechinus variegatus. Furthermore, immunoreactivity with anti-calbindin 1 and anti-parvalbumin was obtained to a fragment of calbindin-D32k of H. glaberrima. Our findings suggest that calbindin-D32k is present in invertebrates and its sequence is more similar to the vertebrate calbindin 2 than to calbindin 1. Thus, characterization of calbindin-D32k in echinoderms provides an important view of the evolution of this protein family and represents a valuable marker to study the nervous system of invertebrates

    Identification of Eps15 as Antigen Recognized by the Monoclonal Antibodies aa2 and ab52 of the Wuerzburg Hybridoma Library against Drosophila Brain

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    The Wuerzburg Hybridoma Library against the Drosophila brain represents a collection of around 200 monoclonal antibodies that bind to specific structures in the Drosophila brain. Here we describe the immunohistochemical staining patterns, the Western blot signals of one- and two-dimensional electrophoretic separation, and the mass spectrometric characterization of the target protein candidates recognized by the monoclonal antibodies aa2 and ab52 from the library. Analysis of a mutant of a candidate gene identified the Drosophila homolog of the Epidermal growth factor receptor Pathway Substrate clone 15 (Eps15) as the antigen for these two antibodies

    Soziale Appelle in der Gesundheitskommunikation

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    Reifegerste D. Soziale Appelle in der Gesundheitskommunikation. In: Rossmann C, Hastall MR, eds. Handbuch der Gesundheitskommunikation. Kommunikationswissenschaftliche Perspektiven. Wiesbaden: Springer Fachmedien Wiesbaden; 2019: 493-503.Soziale Appelle beziehen sich im Gegensatz zu Gesundheitsappellen auf die sozialen Konsequenzen eines gesundheitsrelevanten Verhaltens und nicht auf die körperlichen und mentalen Risiken. Insbesondere für Bevölkerungsgruppen, denen soziale Ziele wichtiger als Gesundheit (d. h. ihre biophysiologische Unversehrtheit) sind, kann diese Botschaftsstrategie zielführend sein, um sie zu erreichen und ihre Gesundheit zu verbessern. Der Beitrag stellt verschiedene Formen sozialer Appelle und den entsprechenden Forschungsstand dar

    Age-dependent neurodegeneration and Alzheimer-amyloid plaque formation in transgenic Drosophila

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    Beta-amyloid peptides that are cleaved from the amyloid precursor protein (APP) play a critical role in Alzheimer's disease (AD) pathophysiology. Here, we show that in Drosophila, the targeted expression of the key genes of AD, APP, the beta-site APP-cleaving enzyme BACE, and the presenilins led to the generation of beta-amyloid plaques and age-dependent neurodegeneration as well as to semilethality, a shortened life span, and defects in wing vein development. Genetic manipulations or pharmacological treatments with secretase inhibitors influenced the activity of the APP-processing proteases and modulated the severity of the phenotypes. This invertebrate model of amyloid plaque pathology demonstrates Abeta-induced neurodegeneration as a basic biological principle and may allow additional genetic analyses of the underlying molecular pathways

    Krankenkassenkommunikation

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    Reifegerste D, Schiller S, Leu J. Krankenkassenkommunikation. In: Rossmann C, Hastall MR, eds. Handbuch der Gesundheitskommunikation. Kommunikationswissenschaftliche Perspektiven. Wiesbaden: Springer Fachmedien Wiesbaden; 2019: 121-132.Die Kommunikation der gesetzlichen Krankenkassen ist vielfältig, komplex und von den gesetzlichen und strukturellen Rahmenbedingungen im Gesundheitswesen geprägt. Aufgrund ihrer Funktionen als Zahlungsinstanz und Vermittler zwischen Versicherten und Leistungserbringern weisen Krankenkassen Interaktionen mit verschiedenen Akteuren des Gesundheitswesens auf. Der Kontakt mit Versicherten spiegelt Konflikte in den Zielstellungen (wie Wettbewerbsdruck, Kostenmanagement und Leistungsversorgung) wider. Dies wird anhand der Kommunikation zur Mitgliedergewinnung, Kundenbindung und Versorgung aufgezeigt

    Qualitätssicherung in der Gesundheitskommunikation: Anregungen aus Debatten in Nachbarfächern

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    Reifegerste D, Hastall MR. Qualitätssicherung in der Gesundheitskommunikation: Anregungen aus Debatten in Nachbarfächern. In: Baumann E, Hastall MR, Rossmann C, Sowka A, eds. Gesundheitskommunikation als Forschungsfeld der Kommunikations- und Medienwissenschaft. Gesundheitskommunikation/ Health Communication. Vol 9. 1. Aufl. Baden-Baden: Nomos; 2014: 36-47

    Gemeinsam aktiver? Der Einfluss von Gruppenbildern auf die körperliche Aktivität

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    Reifegerste D, Rossmann C. Gemeinsam aktiver? Der Einfluss von Gruppenbildern auf die körperliche Aktivität. In: Schäfer M, Quiring O, Rossmann C, Hastall MR, Baumann E, eds. Gesundheitskommunikation im gesellschaftlichen Wandel. Gesundheitskommunikation/Health Communication. Vol 10. Baden-Baden: Nomos; 2015: 179-188
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