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heart

  • RESEARCH ARTICLE
    Cardiophysiological responses of the air-breathing Alaska blackfish to cold acclimation and chronic hypoxic submergence at 5°C
    Jonathan A. W. Stecyk, Christine S. Couturier, Denis V. Abramochkin, Diarmid Hall, Asia Arrant-Howell, Kerry L. Kubly, Shyanne Lockmann, Kyle Logue, Lenett Trueblood, Connor Swalling, Jessica Pinard, Angela Vogt
    Journal of Experimental Biology 2020 223: jeb225730 doi: 10.1242/jeb.225730 Published 16 November 2020

    Summary: The air-breathing Alaska blackfish exhibits an atypical cardiac electrophysiological response to cold acclimation and prioritizes the continuation of cardiac performance to support an active lifestyle over reducing cardiac ATP demand when exposed to prolonged aquatic hypoxia without air access.

  • SHORT COMMUNICATION
    The formation of the atrioventricular conduction axis is linked in development to ventricular septation
    Alena Kvasilova, Veronika Olejnickova, Bjarke Jensen, Vincent M. Christoffels, Hana Kolesova, David Sedmera, Martina Gregorovicova
    Journal of Experimental Biology 2020 223: jeb229278 doi: 10.1242/jeb.229278 Published 12 October 2020

    Summary: Completion of ventricular septation is required for the presence of the atrioventricular conduction system (AVCS) in extant Archelosauria. AVCS formation is correlated with full ventricular septation in both evolution and development.

  • RESEARCH ARTICLE
    Warmer, faster, stronger: Ca2+ cycling in avian myocardium
    Tatiana S. Filatova, Denis V. Abramochkin, Holly A. Shiels
    Journal of Experimental Biology 2020 223: jeb228205 doi: 10.1242/jeb.228205 Published 8 October 2020

    Summary: Avian cardiac cells have large SR stores and large sarcolemmal Ca2+ currents; these features may be the key to high performance of the avian heart despite their reptilian-like ultrastructure.

  • RESEARCH ARTICLE
    Future ocean warming may prove beneficial for the northern population of European seabass, but ocean acidification will not
    Sarah Howald, Louise Cominassi, Nicolas LeBayon, Guy Claireaux, Felix C. Mark
    Journal of Experimental Biology 2019 222: jeb213017 doi: 10.1242/jeb.213017 Published 11 November 2019

    Summary: Heart mitochondria of juvenile European sea bass are impaired by acute warming, but seem to benefit from conditioning to warmer temperatures; they are only marginally impacted by ocean acidification.

  • RESEARCH ARTICLE
    microRNA-29b knocks down collagen type I production in cultured rainbow trout (Oncorhynchus mykiss) cardiac fibroblasts
    Elizabeth F. Johnston, Ivan G. Cadonic, Paul M. Craig, Todd E. Gillis
    Journal of Experimental Biology 2019 222: jeb202788 doi: 10.1242/jeb.202788 Published 6 September 2019

    Summary: Increased expression of microRNA-29b decreases collagen type I synthesis in rainbow trout (Oncorhynchus mykiss) cardiac fibroblasts, suggesting that this microRNA could play a role in temperature-induced changes in collagen content in the trout heart.

  • RESEARCH ARTICLE
    Thermal acclimation and seasonal acclimatization: a comparative study of cardiac response to prolonged temperature change in shorthorn sculpin
    Tatiana S. Filatova, Denis V. Abramochkin, Holly A. Shiels
    Journal of Experimental Biology 2019 222: jeb202242 doi: 10.1242/jeb.202242 Published 20 August 2019

    Highlighted Article: The effects of seasonal acclimatization on cardiac responses to low temperatures are stronger than those of acclimation to similar temperatures in laboratory conditions, highlighting the importance of seasonal cues for cardiac remodelling in a eurythermal fish.

  • RESEARCH ARTICLE
    Selenoprotein T as a new positive inotrope in the goldfish, Carassius auratus
    Rosa Mazza, Alfonsina Gattuso, Sandra Imbrogno, Loubna Boukhzar, Serena Leo, Ben Yamine Mallouki, Mariacristina Filice, Carmine Rocca, Tommaso Angelone, Youssef Anouar, Maria Carmela Cerra
    Journal of Experimental Biology 2019 222: jeb201202 doi: 10.1242/jeb.201202 Published 4 June 2019

    Summary: SELENOT, a thioredoxin-like protein, is proposed as a cardiac modulator in the goldfish Carassius auratus, with a potential role in hypoxia tolerance.

  • RESEARCH ARTICLE
    Structural and functional characterization of the contractile aorta and associated hemocytes of the mosquito Anopheles gambiae
    Leah T. Sigle, Julián F. Hillyer
    Journal of Experimental Biology 2018 221: jeb181107 doi: 10.1242/jeb.181107 Published 22 June 2018

    Summary: Structural mechanics of hemolymph flow through the aorta and conical chamber of the African malaria mosquito, Anopheles gambiae.

  • SHORT COMMUNICATION
    Relative position of the atrioventricular canal determines the electrical activation of developing reptile ventricles
    Martina Gregorovicova, David Sedmera, Bjarke Jensen
    Journal of Experimental Biology 2018 221: jeb178400 doi: 10.1242/jeb.178400 Published 7 June 2018

    Summary: The heart ventricles of squamate reptiles are without a specialized ventricular conduction system, and the manner of electrical activation can therefore be predicted on the basis of morphology.

  • RESEARCH ARTICLE
    Frank–Starling mechanism and short-term adjustment of cardiac flow
    José Guilherme Chaui-Berlinck, Luiz Henrique Alves Monteiro
    Journal of Experimental Biology 2017 220: 4391-4398; doi: 10.1242/jeb.167106

    Summary: The Frank–Starling mechanism has no working in the stability of the circulatory system. Rather, the mechanism accounts for decreasing the need for central control and for speeding up changes in cardiac output.

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