Sarcoplasmic reticulum
Properties of the fragmented sarcoplasmic reticulum from fast twitch and slow twitch muscles
... fragmented sarcoplasmic reticulum (FSR) prepared from both types of fast twitch muscles has identical calcium-accumulating capacity (maximal calcium uptake) and calcium-concentrating ...
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Calcium transport by skeletal muscle sarcoplasmic reticulum in the hypothyroid rat
... The rate of calcium transport by isolated sarcoplasmic reticulum from rat skeletal muscle increases markedly during the first 4 wk of life and thereafter remains relatively constant. When animals are made ...
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High resolution structural evidence suggests the Sarcoplasmic Reticulum forms microdomains with acidic stores (lysosomes) in the heart
... Conventional TEM methods utilising higher concentrations of glutaraldehyde and followed by Spurr resin embedding allow for better visualisation of membranes. Whilst this method is ideal for imaging intra- cellular ...
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Sarcolemmal ion currents and sarcoplasmic reticulum Ca2+ content in ventricular myocytes from the cold stenothermic fish, the burbot (Lota lota)
... 2002). Although some ectotherms cope with cold temperatures via cold-torpor and resultant reductions in metabolic rate and heart rate, there are several compensative changes often associated with ectotherms that remain ...
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3D ultrastructural organisation of calcium release units in the avian sarcoplasmic reticulum
... in avian left atrial tissue. (A) 2D image from a reconstructed tomogram stack, with a segmented model overlaid. The segmented model shows: peripheral couplings (PCs; purple) and the nearest edge – edge distances between ...
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Phospholamban mediated stimulation of Ca2+ uptake in sarcoplasmic reticulum from normal and failing hearts
... in sarcoplasmic reticulum prepared from normal human left ventricular myocardium and ...in sarcoplasmic reticulum prepared from the left ventricular myocardium of patients with heart failure ...
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Temperature perturbation studies of sarcoplasmic reticulum from malignant hyperthermia pig muscle
... susceptible group (MHX). At 25 degrees C, calcium binding was lower for MHS than for controls and MHX. As temperature was increased by 2 degrees C jumps, calcium binding decreased in all sarcoplasmic ...
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Overexpression of the rat sarcoplasmic reticulum Ca2+ ATPase gene in the heart of transgenic mice accelerates calcium transients and cardiac relaxation
... the sarcoplasmic reticulum (SERCA2) plays a dominant role in lowering cytoplasmic calcium levels during cardiac relaxation and reduction of its activity has been linked to delayed diastolic relaxation in ...
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Ma2/d promotes myonuclear positioning and association with the sarcoplasmic reticulum
... Fully differentiated skeletal muscle fibers are multinucleated, elongated cells with highly ordered cytoplasm, essential for efficient muscle contraction and organismal movement. Muscle nuclei are positioned evenly along ...
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Metabolic consequences of functional complexes of mitochondria, myofibrils and sarcoplasmic reticulum in muscle cells
... This also seems to be true for mitochondrial–cytoskeletal interactions in general. In many types of cells, one sometimes observes rather vigorous movement of mitochondria due to their interaction with cytoskeletal ...
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The effect of chlorpyrifos upon ATPase activity of sarcoplasmic reticulum and biomechanics of skeletal muscle contraction
... of sarcoplasmic reticulum (SR) and biomechanical contractile properties of skeletal muscle (SM), and to analyze the progression of these changes over time depending on concentrations of the ...
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Comparative studies on the sarcoplasmic reticulum of fish muscle
... Huxley, 1957, 1964; Andersen-Cedergren, 1958; Peachy, 1965)* Essentially, the SR is a fine reticular structure of membrane limited elements (Franzini-Armstrong, 1973). There are many similarities between the ...
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Effect of Dietary Nitrate on Force Production and Sarcoplasmic Reticulum Ca2+ Handling in Rat Fast Twitch Muscles Following Eccentric Contraction
... Impaired excitation-contraction coupling occurs in eccentric contraction (ECC)-induced damaged muscles. It has been suggested that sarcoplasmic re- ticulum (SR) is susceptible to damage in the overstretched ...
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Ca++ Uptake and ATPase of Human Sarcoplasmic Reticulum
... ATPase activity of grana obtained from human white muscle was only slightly inhibited by sodium azide; purified grana activity showed little or no inhibition by azide Table III.. The ATP[r] ...
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Sarcoplasmic Reticulum Ca release in Intact Ventricular Myocytes
... Combining molecular biology techniques with Ca2+ imaging methods represents an almost ideal approach for engineering less complex experimental models. After the skeletal and cardiac muscle isoforms of the RyR (i.e. RyR1 ...
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The role of the sarcoplasmic reticulum in the generation of high heart rates and blood pressures in reptiles
... reticulum (SR) in the generation of high heart rates and blood pressures was investigated in four species of reptile; the turtle, Trachemys scripta; the python, Python regius, the tegu lizard, Tupinanvis merianae, ...
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Ca(2+) uptake in the sarcoplasmic reticulum from the systemic heart of octopod cephalopods
... uptake in crude homogenates of heart tissue, as well as cell shortening and ionic currents in isolated myocytes exposed to caffeine, to characterize Ca2+ uptake in the sarcoplasmic retic[r] ...
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Temperature dependence of cardiac sarcoplasmic reticulum function in rainbow trout myocytes
... Furthermore, we the effect of varying stimulation pulse number, frequency observed SR-Ca2+-dependent inactivation of the L-type and experimental temperature 7°C, 14°C and 21°C on Ca2+ ch[r] ...
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K+-Selective Channel from Sarcoplasmic Reticulum of Split Lobster Muscle Fibers
... The curve for the o p e n channels was measured with 460 mM Na gluta-i20 -8o IO 8~0 120 m V mate relaxing saline on the cytoplasmic side pipette and 460 mM K glutamate relaxing | saline [r] ...
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Catalytic activity and heat production by the Ca(2+) ATPase from sea cucumber (Ludwigothurea grisea) longitudinal smooth muscle: modulation by monovalent cations
... Hill, B., Sanger, J. W. and Chen, C. (1982). Close apposition of muscle cells in the longitudinal bands of the body wall of a holothurian, Isostichopus badionotus. Cell Tissue Res. 227, 465–473. Hill, R. B., Sanger, J. ...
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