Dynamic aspects of presynaptic calcium currents mediating synaptic transmission.

abstract：:In mammals Ca2+ concentration in the extracellular fluids ([Ca2+]o) is essential for a number of vital processes varying from bone mineralization to blood coagulation, regulation of enzymatic processes, modulation of permeability and excitability of plasma membranes. For this reason [Ca2+]o is under strict control of ...

journal_title：Cell calcium

authors： Riccardi D

更新日期：1999-09-01 00:00:00

abstract：:Intracellular Ca(2+)-transport ATPases exert a pivotal role in the endoplasmic reticulum and in the compartments of the cellular secretory pathway by maintaining a sufficiently high lumenal Ca(2+) (and Mn(2+)) concentration in these compartments required for an impressive number of vastly different cell functions. At ...

journal_title：Cell calcium

authors： Wuytack F,Raeymaekers L,Missiaen L

更新日期：2002-11-01 00:00:00

abstract：:To determine the effects of exposure to reserpine on subcellular Ca2+ transporting systems, active Ca2+ uptake was measured with and without ruthenium red in submandibular gland vesicles obtained from rats after chronic treatment with reserpine. The properties of ruthenium red-sensitive Ca2+ uptake were similar to tho...

journal_title：Cell calcium

authors： Hurley TW,Martinez JR

更新日期：1987-10-01 00:00:00

abstract：:Here, we report a novel role for the cysteine protease calpain in store-operated calcium entry. Several structurally and mechanistically unrelated inhibitors of calpain inhibited Ca2+ entry activated in human platelets by thapsigargin-evoked Ca2+ store depletion or the physiological agonist thrombin, whereas inhibitor...

journal_title：Cell calcium

authors： Harper AG,Sage SO

更新日期：2007-02-01 00:00:00

abstract：:In addition to its role in artery contraction, Rho kinase (ROCK) is reported to be involved in the Ca(2+) response to vasoconstrictor agonist in rat aorta. However the signaling pathway mediated by ROCK had not been investigated so far and it was not known whether ROCK also contributed to Ca(2+) signaling in cultured ...

journal_title：Cell calcium

authors： Martinsen A,Baeyens N,Yerna X,Morel N

更新日期：2012-12-01 00:00:00

abstract：:Ca2+ influx into secretory cells of the intact salivary gland of the blowfly Calliphora erythrocephala elicited by the agonist 5-hydroxytryptamine (5-HT) or the Ca2+ uptake inhibitor thapsigargin was studied by using Fura-2 and digital fluorescence imaging and by recordings of the transepithelial potential. Applicatio...

journal_title：Cell calcium

authors： Zimmermann B

更新日期：1998-01-01 00:00:00

abstract：:Rat liver was homogenized and subjected to differential centrifugation. When the low speed nuclear pellet was processed on a Percoll gradient, plasma membrane markers and Ins(1,4,5)P3 binding activity purified together. The high speed (microsomal) fraction was subfractionated by sucrose density gradient centrifugation...

journal_title：Cell calcium

authors： Enyedi P,Szabadkai G,Krause KH,Lew DP,Spät A

更新日期：1993-06-01 00:00:00

abstract：:Using the fluorescent Ca2+ probe Quin-2 it has been reported that cholera toxin (CT) and its B subunit (B-CT) increase cytosolic free Ca2+ concentration ([Ca2+]i) in entherocytes, thymocytes and fibroblasts. In this work we show, however, that the fluorescence increases of Quin-2-loaded cells (rat thymocytes, mouse sp...

journal_title：Cell calcium

authors： Astashkin EI,Surin AM,Mikhna MG,Nikolaeva IS,Lazarev AV,Gukovskaya AS

更新日期：1990-06-01 00:00:00

abstract：:Receptors for extracellular nucleotides (the P2X-calcium channels and the phospholipase C-coupled P2Y receptors) play key roles in pain signaling, but little is known on their function in trigeminal ganglia, whose hyperactivation leads to the development of migraine pain. Here we characterize calcium signaling via P2X...

journal_title：Cell calcium

authors： Ceruti S,Fumagalli M,Villa G,Verderio C,Abbracchio MP

更新日期：2008-06-01 00:00:00

abstract：:Mechanically induced channel activities and increase of intracellular calcium ([Ca2+]i) in normal and cancerous murine mammary cells (MMT 060562) were investigated using the patch clamp technique and Fura-2 fluorescence. Both cell types showed similar properties. Upon mechanical stimulation, activation of the Ca(2+)-d...

journal_title：Cell calcium

authors： Enomoto K,Furuya K,Yamagishi S,Maeno T

更新日期：1992-08-01 00:00:00

abstract：:Membrane deformation induced by a mechanical stimulus increases the [Ca2+]i in cultured retinal pigment epithelial (RPE) cells, and in many other cell types. In this study, confocal microscopy and Ca(2+)-measurements using the fluorescent dye fluo-3 were used to measure the spatiotemporal characteristics of the Ca(2+)...

journal_title：Cell calcium

authors： Stalmans P,Himpens B

更新日期：1999-06-01 00:00:00

abstract：:Sarcoplasmic reticulum contains the internal Ca(2+) store in smooth muscle cells and its lumen appears to be a continuum that lacks diffusion barriers. Accordingly, the free luminal Ca(2+) level is the same all throughout the SR; however, whether the Ca(2+) buffer capacity is the same in all the SR is unknown. We have...

journal_title：Cell calcium

authors： Dagnino-Acosta A,Guerrero-Hernández A

更新日期：2009-09-01 00:00:00

abstract：:The effects of the unsaturated fatty acids, arachidonic and oleic acid, on the influx of Ca2+ activated by depletion of intracellular stores with thapsigargin were investigated in various cell types. By using a Ca2+ free/Ca2+ reintroduction protocol, we observed that arachidonic acid (2 to 5 microM) inhibited thapsiga...

journal_title：Cell calcium

authors： Gamberucci A,Fulceri R,Benedetti A

更新日期：1997-05-01 00:00:00

abstract：:In human embryonic kidney (HEK) cells stably transfected with green fluorescent protein targeted to the endoplasmic reticulum (ER), elevation of intracellular Ca2+ ([Ca2+]i) altered ER morphology, making it appear punctate. Electron microscopy revealed that these punctate structures represented circular and branched r...

journal_title：Cell calcium

authors： Ribeiro CM,McKay RR,Hosoki E,Bird GS,Putney JW Jr

更新日期：2000-03-01 00:00:00

abstract：:Relative to mammals, the neuroendocrine control of pituitary growth hormone (GH) secretion and synthesis in teleost fish involves numerous stimulatory and inhibitory regulators, many of which are delivered to the somatotrophs via direct innervation. Among teleosts, how multifactorial regulation of somatotroph function...

journal_title：Cell calcium

authors： Chang JP,Habibi HR,Yu Y,Moussavi M,Grey CL,Pemberton JG

更新日期：2012-03-01 00:00:00

abstract：:We present a new method for ratiometric Ca2+ measurements using indicators with excitation spectra in the visible range of wavelengths. Laser-scanning confocal microscopy was used to record intracellular Ca(2+)-signals with high temporal and spatial resolution in single cardiac myocytes. The patch-clamp technique was ...

journal_title：Cell calcium

authors： Lipp P,Niggli E

更新日期：1993-05-01 00:00:00

abstract：:An initial model has been proposed to describe a mechanism for cytosolic calcium oscillations [Jafri MS. Vajda S. Pasik P. Gillo B. (1992) A membrane model for cytosolic calcium oscillations: a study using Xenopus oocytes. Biophys. J., 63, 235-246]. In this paper we extend our original model to include the effects of ...

journal_title：Cell calcium

authors： Jafri MS,Gillo B

更新日期：1994-07-01 00:00:00

abstract：:Cyclic AMP regulates the late step of Ca²+-dependent exocytosis in many secretory cells through two major mechanisms: a protein kinase A-dependent and a cAMP-GEF/Epac-dependent pathway. We designed a protocol to characterize the role of these two cAMP-dependent pathways on the Ca²+ sensitivity and kinetics of regulate...

journal_title：Cell calcium

authors： Skelin M,Rupnik M

更新日期：2011-02-01 00:00:00

abstract：:The sternal epithelium of Porcellio scaber was used as a novel model to study the subcellular elemental distribution in control and Ca(2+)-transporting stages in situ. The anterior sternal epithelium (ASE) is specialized for transport of cuticular Ca to sternal CaCO(3) deposits during premolt, and from these deposits ...

journal_title：Cell calcium

authors： Ziegler A

更新日期：2002-06-01 00:00:00

abstract：BACKGROUND:Previous studies suggest that CaMKII activity is required for frequency-dependent acceleration of relaxation (FDAR) in ventricular myocytes. We propose that the underlying mechanism involves CaMKII-dependent regulation of myofilament Ca(2+) sensitivity. METHODS AND RESULTS:Cardiac function was measured in m...

journal_title：Cell calcium

authors： Guilbert A,Lim HJ,Cheng J,Wang Y

更新日期：2015-11-01 00:00:00

abstract：:A rapid increase in intracellular calcium directly triggers regulated exocytosis. In addition, changes in intracellular calcium concentration can adjust the extent of exocytosis (quantal content) or the magnitude of individual release events (quantal size) in both the short- and long-term. It is generally agreed that ...

journal_title：Cell calcium

authors： Barclay JW,Morgan A,Burgoyne RD

更新日期：2005-09-01 00:00:00

abstract：:Cellular calcium signaling events are transient. Hence they are observed in real time using fluorescence imaging or electrophysiological methods that require sophisticated instrumentation and specialized skills. For high throughput assays simple and inexpensive techniques are desirable. Many calcium channels that serv...

journal_title：Cell calcium

authors： Chandrika AR,Steephan M,Raveendran Nair R,Sudarsana Devi SP,Kumar M,Paul S,Madhavan M,Omkumar RV

更新日期：2018-09-01 00:00:00

abstract：:NADH:ubiquinone oxidoreductase or complex I is a large multisubunit assembly of the mitochondrial inner membrane that channels high-energy electrons from metabolic NADH into the electron transport chain (ETC). Its dysfunction is associated with a range of progressive neurological disorders, often characterized by a ve...

journal_title：Cell calcium

authors： Willems PH,Valsecchi F,Distelmaier F,Verkaart S,Visch HJ,Smeitink JA,Koopman WJ

更新日期：2008-07-01 00:00:00

abstract：:The release of Ca2+ ions from the sarcoplasmic reticulum through ryanodine receptor calcium release channels represents the critical step linking electrical excitation to muscular contraction in the heart and skeletal muscle (excitation-contraction coupling). Two small Ca2+ binding proteins, S100A1 and calmodulin, hav...

journal_title：Cell calcium

authors： Prosser BL,Hernández-Ochoa EO,Schneider MF

更新日期：2011-10-01 00:00:00

abstract：:Increases in global Ca(2+) in the endothelium are a crucial step in releasing relaxing factors to modulate arterial tone. In the present study we investigated spontaneous Ca(2+) events in endothelial cells, and the contribution of smooth muscle cells to these Ca(2+) events, in pressurized rat mesenteric resistance art...

journal_title：Cell calcium

authors： Kansui Y,Garland CJ,Dora KA

更新日期：2008-08-01 00:00:00

abstract：:We investigated whether the expression of human alpha-parvalbumin affects depolarization-induced elevations of the cytosolic free calcium concentration ([Ca2+]i) in human neuroblastoma SKNBE2 cells. A full length human parvalbumin cDNA was cloned by PCR from human cerebellum and transiently transfected into SKNBE2 cel...

journal_title：Cell calcium

authors： Dreessen J,Lutum C,Schäfer BW,Heizmann CW,Knöpfel T

更新日期：1996-06-01 00:00:00

abstract：:Transient spontaneous increases in the intracellular Ca2+ concentration have been frequently observed in astrocytes in cell culture and in acutely isolated slices from several brain regions. Recent in vivo experiments, however, reported only a low frequency of spontaneous Ca2+ events in astrocytes. Since the ex vivo e...

journal_title：Cell calcium

authors： Schipke CG,Heidemann A,Skupin A,Peters O,Falcke M,Kettenmann H

更新日期：2008-03-01 00:00:00

abstract：:Cellular Ca2+ signals are often constrained to cytosolic micro- or nano-domains where stochastic openings of Ca2+ channels cause large fluctuations in local Ca2+ concentration (Ca2+ 'noise'). With the advent of TIRF microscopy to image the fluorescence of Ca2+-sensitive probes from attoliter volumes it has become poss...

journal_title：Cell calcium

authors： Swaminathan D,Dickinson GD,Demuro A,Parker I

更新日期：2020-03-01 00:00:00

abstract：:R24571 a derivative of the antimycotic miconazole, appears to be 5 to 8 times more potent than trifluoperazine in its ability to inhibit the calmodulin-dependent phosphorylation of cardiac sarcoplasmic reticulum vesicles. The cAMP-dependent protein kinase mediated phosphorylation of cardiac sarcoplasmic reticulum was ...

journal_title：Cell calcium

authors： Louis CF,Turnquist J,Jarvis B

更新日期：1983-04-01 00:00:00

abstract：:Hepatocytes stimulated with calcium-mobilising agonists generate free Ca transients whose frequency is modulated by hormone concentration. Importantly, the time-course of individual free Ca transients is independent of agonist dose but does change with agonist species. A receptor-controlled model in which protein kina...

journal_title：Cell calcium

authors： Cobbold PH,Sanchez-Bueno A,Dixon CJ

更新日期：1991-02-01 00:00:00