Affiliation: University of Innsbruck
- Vasodilation of swimbladder vessels in the european eel (Anguilla anguilla) induced by vasoactive intestinal polypeptide, nitric oxide, adenosine and protons- Schwerte
Institut fur Zoologie und Limnologie, Universitat Innsbruck, A 6020 Innsbruck, Austria and Department of Zoophysiology, University of Goteborg, Box 463, SE 40530 Goteborg, Sweden
J Exp Biol 202:1005-13. 1999..None of these effects, however, compares in time span with the previously described immediate, short-lasting vasodilation of swimbladder vessels elicited by pulse stimulation of the vagus nerve...
- Digital motion analysis as a tool for analysing the shape and performance of the circulatory system in transparent animalsT Schwerte
Department of Zoology, University of Innsbruck, A 6020 Innsbruck, Austria
J Exp Biol 203:1659-69. 2000..At this stage, food intake resulted in a clear redistribution of blood between muscle tissue and the gut, and alpha-adrenergic control of peripheral blood flow was established...
- Cardio-respiratory control during early development in the model animal zebrafishThorsten Schwerte
Institute of Zoology and Center for Molecular Biosciences, University of Innsbruck, Technikerstr 25, A 6020 Innsbruck, Austria
Acta Histochem 111:230-43. 2009..Finally, recent improvements in imaging techniques for the use of fish models relevant for developmental physiology and biomedical research are discussed...
- Development of the sympatho-vagal balance in the cardiovascular system in zebrafish (Danio rerio) characterized by power spectrum and classical signal analysisThorsten Schwerte
Institute of Zoology and Limnology and Centre for Molecular Biosciences, University of Innsbruck, Innsbruck, Austria
J Exp Biol 209:1093-100. 2006..Whereas heart movements contained frequency components characterizing HRV, the cardiotachogram did not show typical frequency spectra as known from other species...
- Epigenetic variations in early cardiovascular performance and hematopoiesis can be explained by maternal and clutch effects in developing zebrafish (Danio rerio)Thorsten Schwerte
Institute of Zoology and Limnology and Centre for Molecular Biosciences, University of Innsbruck, Austria
Comp Biochem Physiol A Mol Integr Physiol 141:200-9. 2005..The number of spawned eggs was not different. In summary, these data indicate that "clutch effects" caused by maternal and/or genetic influences can affect the developmental pattern of cardiac performance and blood cell concentration...
- Understanding cardiovascular physiology in zebrafish and Xenopus larvae: the use of microtechniquesThorsten Schwerte
University of Innsbruck, Institute for Zoology and Limnology, Techniker Str 25, A 6020 Innsbruck, Austria
Comp Biochem Physiol A Mol Integr Physiol 135:131-45. 2003..Here, we review experimental tools and methods that have been developed to measure numerous cardiovascular parameters in these millimetre-sized animals...
- Non-invasive imaging of blood cell concentration and blood distribution in zebrafish Danio rerio incubated in hypoxic conditions in vivoThorsten Schwerte
Institute for Zoology and Limnology, University of Innsbruck, Austria
J Exp Biol 206:1299-307. 2003..The vascular bed of various organs was not obviously different in hypoxic animals compared to normoxic animals...
- Vascular control in larval Xenopus laevis: the role of endothelial-derived factorsThorsten Schwerte
Department of Zoophysiology, University of Goteborg, Sweden
J Exp Biol 205:225-32. 2002..Vasoactive mediators released from vascular endothelial cells could be particularly important in vascular control in early embryos when the autonomic innervation is undifferentiated, poorly developed or even absent...
- Nitric oxide and vascular reactivity in developing zebrafish, Danio rerioR Fritsche
Department of Zoophysiology, University of Goteborg, 405 30 Goteborg, Sweden
Am J Physiol Regul Integr Comp Physiol 279:R2200-7. 2000....
- Ontogenetic development of erythropoiesis can be studied non-invasively in GATA-1:DsRed transgenic zebrafishNadeem Yaqoob
University of Innsbruck, Institute of Zoology, Technikerstrasse 25, A 6020 Innsbruck, Austria
Comp Biochem Physiol A Mol Integr Physiol 154:270-8. 2009..The blood volume (aortic diameter) and production time scale proved to be important factors to define the relationship of Epo mRNA with total blood cell concentration and GATA-1 protein expression respectively...
- The influence of environmental P(O(2)) on hemoglobin oxygen saturation in developing zebrafish Danio rerioSandra Grillitsch
Institute for Zoology and Limnology, University of Innsbruck, Austria
J Exp Biol 208:309-16. 2005..The decrease in hemoglobin oxygenation observed at 12 d.p.f. confirms earlier studies indicating that at 12-14 d.p.f., convective oxygen transport becomes necessary to ensure oxygen supply to the growing tissues...
- Influence of swim training on cardiac activity, tissue capillarization, and mitochondrial density in muscle tissue of zebrafish larvaeB Pelster
Institut fur Zoologie und Limnologie, Universitat Innsbruck, A 6020 Innsbruck, Austria
Am J Physiol Regul Integr Comp Physiol 285:R339-47. 2003..Furthermore, this study indicates that plasticity of muscle tissue is already established in early stages of development at both the tissue and cellular levels...
- Influence of hypoxia and of hypoxemia on the development of cardiac activity in zebrafish larvaeE Jacob
Institut fur Zoologie und Limnologie, Universität A 6020 Innsbruck, Austria
Am J Physiol Regul Integr Comp Physiol 283:R911-7. 2002..Thus, under normoxic conditions and with a normal metabolic rate of the tissues, convective oxygen transport is not required until approximately 2 wk after fertilization...
- Ontogeny of the gut motility control system in zebrafish Danio rerio embryos and larvaeAnna Holmberg
Department of Zoophysiology, Goteborg University, Box 463, SE 405 30 Goteborg, Sweden
J Exp Biol 207:4085-94. 2004..1 d.p.f. (PACAP) or 2 d.p.f. (NKA) stages later the whole gut was innervated. This supports physiological results that gut motility is under neuronal control during the period when regular motility patterns develop...
- Functional plasticity of the developing cardiovascular system: examples from different vertebratesBernd Pelster
Institute of Zoology, University of Innsbruck, Innsbruck A 6020, Austria
Physiol Biochem Zool 83:775-91. 2010..Fluid forces, oxygen availability, ionic homeostasis, and the chemical environment (including, e.g., hormone concentrations or cholesterol levels) all contribute to the shaping and performance of the cardiovascular system...
- Chronic reduction in cardiac output induces hypoxic signaling in larval zebrafish even at a time when convective oxygen transport is not requiredRenate Kopp
Institute of Zoology and Center for Molecular Biosciences, University of Innsbruck, Innsbruck, Austria
Physiol Genomics 42:8-23. 2010..The results showed that a chronic reduction in blood flow generated hypoxic molecular signals despite partial compensation by increased oxygen carrying capacity and transiently slowed the overall development of zebrafish bre larvae...
- NO as a mediator during the early development of the cardiovascular system in the zebrafishBernd Pelster
Department of Zoology and Limnology, University of Innsbruck, Austria
Comp Biochem Physiol A Mol Integr Physiol 142:215-20. 2005..The data reveal that NO plays an important role in the development of the cardiovascular system and in the ontogeny of the cardiovascular control system in fish...
- How does blood cell concentration modulate cardiovascular parameters in developing zebrafish (Danio rerio)?Renate Kopp
Institute of Zoology, and Center for Molecular Biosciences, University of Innsbruck, Austria
Comp Biochem Physiol A Mol Integr Physiol 146:400-7. 2007..However, several changes in cardiovascular system indicated that phenotypic plasticity is established even at an early developmental stage...
- Cardiac performance in the zebrafish breakdance mutantRenate Kopp
Institute of Zoology and Limnology, and Center for Molecular Biosciences, University of Innsbruck, Austria
J Exp Biol 208:2123-34. 2005..The bradycardia and the modified temperature sensitivity of heart rate suggested that the activity of the pacemaker cells was also affected by this mutation...
- Endurance exercise modifies the circadian clock in zebrafish (Danio rerio) temperature independentlyM Egg
Institut fur Zoologie, Universitat Innsbruck, Technikerstr, Austria
Acta Physiol (Oxf) 205:167-76. 2012..As the homoeostatic control of mammalian core temperature interferes strongly with the investigation of this hypothesis, the present study used the poikilotherm zebrafish to answer this question...
- Late onset of NMDA receptor-mediated ventilatory control during early development in zebrafish (Danio rerio)J Turesson
Department of Zoophysiology, Goteborg University, Box 463, S 405 30, Goteborg, Sweden
Comp Biochem Physiol A Mol Integr Physiol 143:332-9. 2006..Furthermore, our results suggest that other non-NMDA receptor mechanisms are responsible for the hypoxia-induced increase in fV during the earlier developmental stages...
- Proper restoration of excitation-contraction coupling in the dihydropyridine receptor beta1-null zebrafish relaxed is an exclusive function of the beta1a subunitJohann Schredelseker
Department of Medical Genetics, Clinical and Molecular Pharmacology, Division of Biochemical Pharmacology, Innsbruck Medical University, A 6020 Innsbruck, Austria
J Biol Chem 284:1242-51. 2009..Consequently, we postulate a model that presents beta(1a) as an allosteric modifier of alpha(1S) conformation enabling skeletal muscle-type EC coupling...