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Keywords: sarcoplasmic reticulum
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Journal Articles
J Exp Biol (2020) 223 (19): jeb228205.
Published: 8 October 2020
.... It has been suggested that birds use intracellular Ca 2+ stored within the sarcoplasmic reticulum (SR) to power contractile function, but neither SR Ca 2+ content nor the cross-talk between channels underlying Ca 2+ -induced Ca 2+ release (CICR) have been studied in adult birds. Here we used voltage...
Journal Articles
J Exp Biol (2013) 216 (19): 3575–3586.
Published: 1 October 2013
... NO production, which, acting through a non-classical cGMP-independent pathway, induces a phospholamban (PLN)-S-nitrosylation-dependent increase of sarcoplasmic reticulum (SR)-Ca 2+ reuptake ( Fig. 2 ) ( Garofalo et al., 2009 ; Cerra and Imbrogno, 2012 ). The intrinsic regulation of cardiac function...
Journal Articles
J Exp Biol (2012) 215 (7): 1162–1169.
Published: 1 April 2012
...Hanna Korajoki; Matti Vornanen SUMMARY In the heart of rainbow trout ( Oncorhynchus mykiss ), the rate of contraction and Ca 2+ uptake into the sarcoplasmic reticulum (SR) are faster in atrial than ventricular muscle, and contraction force relies more on SR Ca 2+ stores after acclimation to cold...
Journal Articles
J Exp Biol (2011) 214 (7): 1068–1076.
Published: 1 April 2011
... ), density, and steady-state and maximal sarcoplasmic reticulum (SR) Ca 2+ content (ssSR load and maxSR load ). Current–voltage relations, peak I Ca density and charge density of I Ca were greatest in mackerel and yellowfin at all temperatures tested. I Ca density and kinetics were temperature sensitive...
Journal Articles
J Exp Biol (2009) 212 (21): 3403–3414.
Published: 1 November 2009
...Hanna Korajoki; Matti Vornanen SUMMARY Calsequestrin (CASQ) is the main Ca 2+ binding protein within the sarcoplasmic reticulum (SR) of the vertebrate heart. The contribution of SR Ca 2+ stores to contractile activation is larger in atrial than ventricular muscle, and in ectothermic fish hearts...
Journal Articles
J Exp Biol (2009) 212 (8): 1106–1114.
Published: 15 April 2009
...). The fatty acid composition of mitochondrial membranes and sarcoplasmic reticulum can be monitored by measuring total muscle phospholipids because all phospholipids are equally affected by diet. Only extreme regimes of endurance training can lead to increments in oxidative capacity matching those induced...
Journal Articles
J Exp Biol (2007) 210 (19): 3356–3360.
Published: 1 October 2007
... stimulated and contralateral control muscles were collected and processed for electron microscopy. We used stereological analysis of muscle cross-sections to quantify the volume densities of contractile elements, sarcoplasmic reticulum, mitochondria and intracellular lipids. We found that mitochondrial...
Journal Articles
J Exp Biol (2006) 209 (11): 2114–2128.
Published: 1 June 2006
... by sarcoplasmic reticulum in fish heart:effects of thermal acclimation. J. Exp. Biol. 201 , 525 -532. Andreasen, P. ( 1985 ). Free and total calcium concentrations in the blood of rainbow trout, Salmo gairdneri , during`stress' conditions. J. Exp. Biol. 118 , 111 -120. Bailey, J. R., Barter, T...
Journal Articles
J Exp Biol (2004) 207 (7): 1093–1099.
Published: 1 March 2004
... . The SBM fibres were rapidly frozen at rest, during contraction and at various times after the onset of relaxation. Changes in calcium distribution in the components of the sarcoplasmic reticulum (SR) were examined on the SBM fibre cryosections. In resting fibres, the calcium concentration was highest...
Journal Articles
J Exp Biol (2003) 206 (12): 2059–2072.
Published: 15 June 2003
... to activation of mitochondrial creatine kinase. These results are taken to show strong structural associations (functional complexes) among mitochondria, sarcomeres and sarcoplasmic reticulum. Inside these complexes, mitochondrial functional state is controlled by channeling of ADP, mostly via energy...
Journal Articles
J Exp Biol (2002) 205 (23): 3631–3639.
Published: 1 December 2002
...Holly A. Shiels; Matti Vornanen; Anthony P. Farrell SUMMARY To explore how the cardiac sarcoplasmic reticulum (SR) functions over a range of temperatures, we used whole-cell voltage clamp combined with rapid caffeine application to study SR Ca 2+ accumulation, release and steady-state content...
Journal Articles
J Exp Biol (2002) 205 (23): 3641–3650.
Published: 1 December 2002
... for correspondence at present address: School of Biomedical Sciences,University of Leeds, Leeds, LS2 9JT, UK (e-mail: hollys@sfu.ca ) 21 8 2002 © The Company of Biologists Limited 2002 2002 L-type Ca 2+ current (I Ca ) calcium transient sarcoplasmic reticulum action potential frequency fish...
Journal Articles
J Exp Biol (1989) 147 (1): 375–391.
Published: 1 November 1989
... in the lipid composition of biological membranes may stabilize membrane structure against substantial diurnal fluctu- ations in temperature. Key words: temperature, sarcoplasmic reticulum, microsomal membranes, phospholipid ~"hposition, phospholipid molecular species, Sonoran desert, ectotherms, homeoviscous...