Journal of Experimental Biology

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Regulation of glycogen metabolism in gills and liver of the euryhaline tilapia (Oreochromis mossambicus) during acclimation to seawater
Journal of Experimental Biology - Tập 210 Số 19 - Trang 3494-3504 - 2007
Joshua Chia-Hsi Chang, Su Mei Wu, Yung‐Che Tseng, Yi-Chun Lee, Otto Baba, Pung-Pung Hwang
SUMMARYGlucose, which plays a central role in providing energy for metabolism, is primarily stored as glycogen. The synthesis and degradation of glycogen are mainly initialized by glycogen synthase (GS) and glycogen phosphorylase (GP),respectively. The present study aimed to examine the glycogen metabolism in fish liver and gills during acute exposure to seawater. ...... hiện toàn bộ
The influence of trout cardiac troponin I and PKA phosphorylation on the Ca2+ affinity of the cardiac troponin complex
Journal of Experimental Biology - Tập 214 Số 12 - Trang 1981-1988 - 2011
Kelly P. Kirkpatrick, Alan Robertson, Jordan M. Klaiman, Todd E. Gillis
SUMMARY The trout heart is 10-fold more sensitive to Ca2+ than the mammalian heart. This difference is due, in part, to cardiac troponin C (cTnC) from trout having a greater Ca2+ affinity than human cTnC. To determine what other proteins are involved, we cloned cardiac troponin I (cTnI) from the trout heart and determined how it alters the Ca2+ affin...... hiện toàn bộ
A marine diatom-derived aldehyde induces apoptosis in copepod and sea urchin embryos
Journal of Experimental Biology - Tập 206 Số 19 - Trang 3487-3494 - 2003
Giovanna Romano, Gian Luigi Russo, Isabella Buttino, Adrianna Ianora, Antonio Miralto
SUMMARY The diatom-derived aldehyde 2-trans-4-trans-decadienal(DD) was tested as an apoptogenic inducer in both copepod and sea urchin embryos, using terminal-deoxynucleotidyl-transferase-mediated dUTP nick-end labelling (TUNEL), DNA fragmentation profiling (laddering) and an assay for caspase-3 activity. DD induced TUNEL positivity and DNA laddering...... hiện toàn bộ
Effects of Feeding on Arterial Blood Gases in the American Alligator Alligator Mississippiensis
Journal of Experimental Biology - Tập 203 Số 20 - Trang 3117-3124 - 2000
Morten Busk, Johannes Overgaard, James W. Hicks, Albert F. Bennett, Tobias Wang
ABSTRACT Reptiles habitually ingest large meals at infrequent intervals, leading to changes in acid–base status as the net secretion of acid to the stomach causes a metabolic alkalosis (the alkaline tide). In chronically cannulated and undisturbed amphibians and reptiles, the pH changes in arterial blood are, nevertheless, reduced by a concomitant re...... hiện toàn bộ
Cardiovascular development in embryos of the American alligator Alligator mississippiensis: effects of chronic and acute hypoxia
Journal of Experimental Biology - Tập 208 Số 1 - Trang 31-39 - 2005
Dane A. Crossley, Jordi Altimiras
SUMMARY Chronic hypoxic incubation is a common tool used to address the plasticity of morphological and physiological characteristics during vertebrate development. In this study chronic hypoxic incubation of embryonic American alligators resulted in both morphological (mass) and physiological changes. During normoxic incubation embryonic mass, liver...... hiện toàn bộ
Responses to hypoxia and recovery: repayment of oxygen debt is not associated with compensatory protein synthesis in the Amazonian cichlid,Astronotus ocellatus
Journal of Experimental Biology - Tập 210 Số 11 - Trang 1935-1943 - 2007
Johanne M. Lewis, Inês Costa, Adalberto Luís Val, Vera Maria Fonseca de Almeida‐Val, A. Kurt Gamperl, William R. Driedzic
SUMMARYOxygen consumption, as an indicator of routine metabolic rate (RoMR), and tissue-specific changes in protein synthesis, as measured by 3H-labelled phenylalanine incorporation rates, were determined in Astronotus ocellatus to investigate the cellular mechanisms behind hypoxia-induced metabolic depression and recovery. RoMR was significantly depressed, by appr...... hiện toàn bộ
Atmospheric oxygen level affects growth trajectory, cardiopulmonary allometry and metabolic rate in the American alligator (Alligator mississippiensis)
Journal of Experimental Biology - Tập 212 Số 9 - Trang 1237-1247 - 2009
Tomasz Owerkowicz, Ruth M. Elsey, James W. Hicks
SUMMARYRecent palaeoatmospheric models suggest large-scale fluctuations in ambient oxygen level over the past 550 million years. To better understand how global hypoxia and hyperoxia might have affected the growth and physiology of contemporary vertebrates, we incubated eggs and raised hatchlings of the American alligator. Crocodilians are one of few vertebrate tax...... hiện toàn bộ
Acclimation to hypothermic incubation in developing chicken embryos(Gallus domesticus)
Journal of Experimental Biology - Tập 207 Số 9 - Trang 1543-1552 - 2004
Juli L. Black, Warren W. Burggren
SUMMARYChronic exposure to a low incubation temperature clearly slows the development of poikilothemic chicken embryos (or any other poikilotherms), but little is known about the more subtle developmental effects of temperature,especially on physiological regulatory systems. Consequently, two populations of chicken embryos were incubated at 38°C and 35°C. When comp...... hiện toàn bộ
The Molecular Basis of Chloride Transport in Shark Rectal Gland
Journal of Experimental Biology - Tập 196 Số 1 - Trang 405-418 - 1994
John R. Riordan, Bliss Forbush, John W. Hanrahan
ABSTRACT Transepithelial Cl− secretion in vertebrates is accomplished by a secondary active transport process brought about by the coordinated activity of apical and basolateral transport proteins. The principal basolateral components are the Na+/K+-ATPase pump, the Na+/K+/2Cl− cotransporter (symporter) and a K+ channel. The rate-limiting apical comp...... hiện toàn bộ
Stress signaling: coregulation of hemoglobin and male sex determination through a terpenoid signaling pathway in a crustacean
Journal of Experimental Biology - Tập 208 Số 1 - Trang 15-23 - 2005
Cynthia V. Rider, Thomas A. Gorr, Allen W. Olmstead, Beth A. Wasilak, Gerald A. LeBlanc
SUMMARY Environmental signals can activate neuro-endocrine cascades that regulate various physiological processes. In the present study, we demonstrate that two responses to environmental stress signaling in the crustacean Daphnia magna - hemoglobin accumulation and male offspring production - are co-elevated by the crustacean terpenoid hormone methy...... hiện toàn bộ
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