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Keywords: heart
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Journal Articles
J Exp Biol jeb.242387.
Published: 02 July 2021
... enhanced anoxia survival in adult but not hatchling turtles. To test this, adult and hatchling turtles were acclimated to either 20 o C (warm) or 3 o C (cold) for 5 weeks, and then the heart ventricles were collected for quantitative proteomic analysis. The relative abundances of 1316 identified proteins...
Journal Articles
J Exp Biol jeb.242487.
Published: 04 June 2021
... permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. Thermal tolerance Heart Myocardium Red muscle Acute Temperature acclimation Muscle performance Muscle efficiency Temperature Effects on the Contractile Performance...
Journal Articles
J Exp Biol (2021) 224 (9): jeb242382.
Published: 30 April 2021
... phosphorylation and complex I activity. Summary: Decreases in trout heart mitochondrial function at high temperatures are due to impaired oxidative phosphorylation and complex I activity and may contribute to set upper thermal limits in this species. Complex I Fish Heart Mitochondria Respiration...
Journal Articles
J Exp Biol (2020) 223 (22): jeb225730.
Published: 16 November 2020
... (5H fish), on in vivo and spontaneous heart rate ( f H ), electrocardiogram, ventricular action potential (AP) shape and duration (APD), the background inward rectifier ( I K1 ) and rapid delayed rectifier ( I Kr ) K + currents and ventricular gene expression of proteins involved in excitation...
Journal Articles
J Exp Biol (2020) 223 (19): jeb229278.
Published: 12 October 2020
.... Turtle Crocodile Chicken Embryo Heart The vertebrate heart shows great variability in the number of chambers according to animal physiology, life history and phylogeny. Generally in reptiles, ventricular septation varies among clades from a partially septated ventricle in some taxa of non...
Journal Articles
J Exp Biol (2020) 223 (19): jeb228205.
Published: 08 October 2020
...Tatiana S. Filatova; Denis V. Abramochkin; Holly A. Shiels ABSTRACT Birds occupy a unique position in the evolution of cardiac design. Their hearts are capable of cardiac performance on par with, or exceeding that of mammals, and yet the structure of their cardiomyocytes resembles those of reptiles...
Journal Articles
J Exp Biol (2019) 222 (21): jeb213017.
Published: 11 November 2019
... oxygen. The highly oxygen-dependent heart mitochondria thus might play a key role in shaping an organism's tolerance to temperature. The present study aimed to investigate the effects of acute and chronic warming on the respiratory capacity of European sea bass ( Dicentrarchus labrax L.) heart...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (17): jeb202788.
Published: 06 September 2019
...Elizabeth F. Johnston; Ivan G. Cadonic; Paul M. Craig; Todd E. Gillis ABSTRACT Warm acclimation of rainbow trout can cause a decrease in the collagen content of the heart. This ability to remove cardiac collagen is particularly interesting considering that collagen deposition in the mammalian heart...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (16): jeb202242.
Published: 20 August 2019
... urgency to understand the compensatory abilities of key organs such as the heart to adjust under natural conditions. Thus, the aim of the present study was to directly compare the acclimatization and acclimatory response within a single eurythermal fish species, the European shorthorn sculpin...
Journal Articles
J Exp Biol (2019) 222 (11): jeb201202.
Published: 04 June 2019
... its redox active motif Cys-X-X-Sec. In mammals, SELENOT is expressed during ontogenesis and progressively decreases in adult tissues. In the heart, it is re-expressed after ischemia and induces cardioprotection against ischemia–reperfusion (IR) injury. SELENOT is present in teleost fish, including the...
Journal Articles
J Exp Biol (2018) 221 (12): jeb181107.
Published: 22 June 2018
...Leah T. Sigle; Julián F. Hillyer ABSTRACT The primary pump of the circulatory system of insects is a dorsal vessel that traverses the length of the insect. The anterior portion, located in the head, neck and thorax, is the aorta, and the posterior portion, located in the abdomen, is the heart. Here...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (11): jeb178400.
Published: 07 June 2018
... 2018 16 4 2018 © 2018. Published by The Company of Biologists Ltd 2018 http://www.biologists.com/user-licence-1-1/ Summary: The heart ventricles of squamate reptiles are without a specialized ventricular conduction system, and the manner of electrical activation can therefore be...
Journal Articles
J Exp Biol (2017) 220 (23): 4391–4398.
Published: 01 December 2017
...José Guilherme Chaui-Berlinck; Luiz Henrique Alves Monteiro ABSTRACT The Frank–Starling law of the heart is a filling–force mechanism (FFm), a positive relationship between the distension of a ventricular chamber and its force of ejection, and such a mechanism is found across all the studied...
Journal Articles
J Exp Biol (2017) 220 (9): 1674–1683.
Published: 01 May 2017
.... Warm acclimation Electron transport system Fish Heart Mitochondria Temperature Temperature is a fundamental environmental factor affecting all metabolic and physiological processes in ectothermic animals such as fish. Thus, global warming and the anticipated increased frequency of extreme...
Journal Articles
J Exp Biol (2017) 220 (4): 531–536.
Published: 15 February 2017
.... 12 9 2016 6 12 2016 © 2017. Published by The Company of Biologists Ltd 2017 http://www.biologists.com/user-licence-1-1/ Summary: Shunting in reptiles is ineffective for regulating gastric CO 2 supply but effectively reduces blood O 2 levels. Gas exchange Heart...
Journal Articles
J Exp Biol (2016) 219 (17): 2763–2773.
Published: 01 September 2016
... of the first two steps in glucose utilization in the gas gland of Atlantic cod ( Gadus morhua ). Glucose metabolism by isolated gas gland cells was 12- and 170-fold higher, respectively, than that in heart and red blood cells (RBCs) as determined by the production of 3 H 2 O from [2- 3 H]glucose. In...
Journal Articles
J Exp Biol (2016) 219 (8): 1154–1161.
Published: 15 April 2016
... large hearts, multiple ‘normal’ sized hearts spaced at regular intervals up the neck or held their necks horizontal, or that the siphon effect was in operation. By means of an experimental model, we demonstrate that the siphon principle is able to explain how blood was able to adequately perfuse the...
Journal Articles
J Exp Biol (2015) 218 (23): 3754–3761.
Published: 01 December 2015
... metabolic wastes – processes that require a functional heart. The purpose of this study was to measure the metabolic response of the excised, cannulated hagfish heart to anoxia using direct calorimetry. These experiments were coupled with measurements of cardiac pH and metabolite concentrations, at multiple...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (14): 2269–2278.
Published: 01 July 2015
... coronary microvessels of steelhead trout in a concentration-dependent manner: an effect that is not influenced by incubation at high temperature (20°C) and is partially mediated by prostaglandins. Vasomotor responses Oncorhynchus mykiss Heart Cytokine Tone Vascular resistance...
Journal Articles
J Exp Biol (2015) 218 (11): 1767–1776.
Published: 01 June 2015
...Edward P. Snelling; David A. Taggart; Shane K. Maloney; Anthony P. Farrell; Christopher M. Leigh; Lyn Waterhouse; Ruth Williams; Roger S. Seymour ABSTRACT The heart and left ventricle of the marsupial western grey kangaroo Macropus fuliginosus exhibit biphasic allometric growth, whereby a negative...