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Spatial Distribution of Ca^sup 2+^ Signals during Repetitive Depolarizing Stimuli in Adrenal Chromaffin Cells
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ABSTRACT
Exocytosis in adrenal chromaffin cells is strongly influenced by the pattern of stimulation. To understand the dynamic and spatial properties of the underlying Ca^sup 2+^ signal, we used pulsed laser Ca^sup 2+^ imaging to capture Ca^sup 2+^ gradients during stimulation by single a
nd repetitive depolarizing stimuli. Short single pulses (10-100 ms) lead to the development of submembrane Ca^sup 2+^ gradients, as previously described (F. D. Marengo and J. R. Monck, 2000, Biophysical Journal, 79:1800-1820). Repetitive stimulation with trains of multiple pulses (50 ms each, 2Hz) produce a ...
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Mutations in the Ca^sup 2-^/H^sup +^ Transporter CAX1 Increase CBF/DREB1 Expression and the Cold-Acclimation Response in Arabidopsis
; ...increases in cytosolic free calcium concentration ([Ca^sup 2+^]^sub cyt^) are essential for plant responses...low temperature. Subsequent reestablishment of [Ca^sup 2+^]^sub cyt^ to resting levels by Ca^sup 2+^ pumps and C-REPEAT BINDING FACTOR/DEHYDRATION...
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Inhibition of cAMP-Dependent Protein Kinase under Conditions Occurring in the Cardiac Dyad during a Ca^sup 2+^ Transient
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^sup 41^Ca and Accelerator Mass Spectrometry to Monitor Calcium Metabolism in End Stage Renal Disease Patients
; ...by serial measurements of the ratio ^sup 41^Ca/Ca in serum after in vivo labeling of calcium pools with ^sup 41^Ca. We report the preparation of an intravenous...isotope being ^sup 40^Ca. Stable (^sup 42^Ca, ^sup 44^Ca, and ^sup 46^Ca) ...
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Ca^sup 2+^ Stores Regulate Ryanodine Receptor Ca^sup 2+^ Release Channels via Luminal and Cytosolic Ca^sup 2+^ Sites
; ABSTRACT The free [Ca^sup 2+^] in endoplasmic/sarcoplasmic reticulum Ca^sup 2+^ stores regulates excitability of Ca^sup 2+^ release by stimulating the Ca^sup...
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Decoding Ca^sup 2+^ Signals in Plants
; Different input signals create their own characteristic Ca^sup 2+^ fingerprints. These fingerprints are distinguished by frequency, amplitude, duration, and number of Ca^sup 2+^ oscillations. Ca^sup 2+^-binding proteins and protein kinases decode these...
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Effects of Intracellular and Extracellular Concentrations of Ca^sup 2+^, K+, and Cl- on the Na+-Dependent Mg^sup 2+^ Efflux in Rat Ventricular Myocytes
; ...unchanged by the addition of extracellular Ca^sup 2+^ up to 1 mM (107.3 8.7% of the control value measured at 0 mM [Ca^sup 2+^]^sub o^ in the presence of 0.1 mM EGTA, n = 5). Intracellular loading of a Ca^sup 2+^ chelator, either BAPTA or dimethyl...
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Role of Sarcoplasmic Reticulum and Mitochondria in Ca^sup 2+^ Removal in Airway Myocytes
; ...to determine the influence of the sarco-endoplasmic Ca^sup 2+^-ATPase (SERCA) activity and mitochondria Ca^sup 2+^ uptake on Ca^sup 2+^ homeostasis in airway myocytes. Experimental studies...
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InsP^sub 3^ Signaling Induces Pulse-Modulated Ca^sup 2+^ Signals in the Nucleus of Airway Epithelial Ciliated Cells
; ABSTRACT The phenomenology of nuclear Ca^sup 2+^ dynamics has experienced important...Although several agonists can mobilize Ca^sup 2+^ from storage in the nuclear envelope...compartment (INC), the mechanisms of Ca^sup 2+^ signaling in the nucleus still remain...
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Consequences of Molecular-Level Ca^sup 2+^ Channel and Synaptic Vesicle Colocalization for the Ca^sup 2+^ Microdomain and Neurotransmitter Exocytosis: A Monte Carlo Study
; ...indicate association between voltage-gated Ca^sup 2+^ channels and the vesicle docking...constrain the separation between some Ca^sup 2+^ channels and vesicles to 20 nm or...relationship among the vesicles, the Ca^sup 2+^ channel, and the proteins of the...
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Temperature Dependence and Thermodynamic Properties of Ca^sup 2+^ Sparks in Rat Cardiomyocytes
; ...thermodynamic determinants of the elementary Ca^sup 2+^ release from the sarcoplasmic reticulum, we characterized Ca^sup 2+^ sparks originating from ryanodine...the normalized fluo-3 fluorescence of Ca^sup 2+^ sparks decreased monotonically...
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