Ion channels in smooth muscle: regulation by the sarcoplasmic reticulum and mitochondria.

abstract：:Many fluorescent Ca indicators, particularly those loaded as acetoxymethyl (AM)-ester derivatives, are known to become compartmentalized into organelles. This property can be exploited to measure changes in free [Ca] in subcellular compartments, including the inositol (1,4,5)-trisphosphate-sensitive store. However, qu...

journal_title：Cell calcium

authors： Hofer AM,Schulz I

更新日期：1996-09-01 00:00:00

abstract：:Here we report on the feasibility of using replication deficient adenoviruses to modify signal transduction systems in epithelia. We constructed two viruses, one expressing a dominant negative mutant of the alpha-subunit of Gq (Ad-EF1-dnG alpha q) and the other expressing the wild-type alpha-subunit of Gq (Ad-EF1-wtG ...

journal_title：Cell calcium

authors： Poronnik P,O'Mullane LM,Harding EA,Greger R,Cook DI

更新日期：1998-08-01 00:00:00

abstract：:Using the low-affinity fluorescent Ca(2+) indicators, Mag-Fura-2 and Mag-Fura Red, we studied light- and InsP(3)-induced Ca(2+) release in permeabilized microvillar photoreceptors of the medicinal leech, Hirudo medicinalis. Two major components of the phosphoinositide signaling pathway, phospholipase-C and the InsP(3)...

journal_title：Cell calcium

authors： Ukhanov K,Mills SJ,Potter BV,Walz B

更新日期：2001-05-01 00:00:00

abstract：:Great insight has been gained into the structure and function of the inositol 1,4,5 trisphosphate receptor (InsP(3)R) by studies employing mutagenesis of the cDNA encoding the receptor. Notably, early studies using this approach defined the key constituents required for InsP(3) binding in the N-terminus and the membra...

journal_title：Cell calcium

authors： Yule DI,Betzenhauser MJ,Joseph SK

更新日期：2010-06-01 00:00:00

abstract：:Using whole cell patch clamp recordings on unfertilized eggs of the ascidian Ciona intestinalis, we are able to detect ryanodine receptors within the oocytes. Our approach is based on measurements of the voltage-activated inward calcium currents. Two types of Ca2+ currents have been described on the oocyte membrane of...

journal_title：Cell calcium

authors： Arnoult C,Albrieux M,Antoine AF,Grunwald D,Marty I,Villaz M

更新日期：1997-02-01 00:00:00

abstract：:Agonist induced increases in intracellular free calcium, [Ca2+]i, were measured in single Fura-2 loaded bovine aortic endothelial (BAE) cells by dual wavelength microspectrofluorimetry. Low doses of ATP (less than 10 microM) induced complex changes in [Ca2+]i. These changes usually consisted of a large initial transie...

journal_title：Cell calcium

authors： Lynch M,Gillespie JI,Greenwell JR,Johnson C

更新日期：1992-04-01 00:00:00

abstract：:C3H/10T1/2 mouse embryo fibroblasts stimulated by a steady electric field (10 V/cm) for 30 min exhibited lamellar retraction on the sides facing the electrodes. Some cells elongated and preferentially oriented with their long axis perpendicular to the field direction. Depletion of external calcium or blockage of calci...

journal_title：Cell calcium

authors： Onuma EK,Hui SW

更新日期：1985-06-01 00:00:00

abstract：:Pancreatitis is an increasingly common disease that carries a significant mortality and which lacks specific therapy. Pathological calcium signalling is an important contributor to the initiating cell injury, caused by or acting through mitochondrial inhibition. A principal effect of disordered cell signalling and imp...

journal_title：Cell calcium

authors： Mukherjee R,Criddle DN,Gukovskaya A,Pandol S,Petersen OH,Sutton R

更新日期：2008-07-01 00:00:00

abstract：:Secretory granules of pancreatic β-cells contain high concentrations of Ca2+ ions that are co-released with insulin in the extracellular milieu upon activation of exocytosis. As a consequence, an increase in the extracellular Ca2+ concentration ([Ca2+]ext) in the microenvironment immediately surrounding β-cells should...

journal_title：Cell calcium

authors： Gerbino A,Maiellaro I,Carmone C,Caroppo R,Debellis L,Barile M,Busco G,Colella M

更新日期：2012-05-01 00:00:00

abstract：:Cell survival is promoted by the oncoprotein Bcl-2. Previous studies have established that one of the pro-survival actions of Bcl-2 is to reduce cellular fluxes of Ca2+ within cells. In particular, Bcl-2 has been demonstrated to inhibit the release of Ca2+ from the endoplasmic reticulum. However, the mechanism by whic...

journal_title：Cell calcium

authors： Hanson CJ,Bootman MD,Distelhorst CW,Wojcikiewicz RJ,Roderick HL

更新日期：2008-09-01 00:00:00

abstract：:Alternative splicing of the sarco/endoplasmic reticulum (SERCA2) Ca2+ pump transcript generates the two isoforms: SERCA2a in left ventricular myocytes (LVM) and SERCA2b in most tissues. Nuclear protein extracts from left ventricular myocytes can cause a decay of the 3'-region of the SERCA2a. To determine if all the do...

journal_title：Cell calcium

authors： Misquitta CM,Ghosh P,Mwanjewe J,Grover AK

更新日期：2005-01-01 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：:Vesl/Homer proteins physically link proteins that mediate cellular signaling [Curr. Opin. Neurobiol. 10 (2000) 370; Trends Neurosci. 23 (2000) 80; J. Cell Sci. 113 (2000) 1851] and thereby influence cellular function [Nat. Neurosci. 4 (2001) 499; Nature 411 (2001) 962]. A previous study reported that Vesl-1L/Homer-1c ...

journal_title：Cell calcium

authors： Hwang SY,Wei J,Westhoff JH,Duncan RS,Ozawa F,Volpe P,Inokuchi K,Koulen P

更新日期：2003-08-01 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：:NAADP is a potent regulator of cytosolic calcium levels. Much evidence suggests that NAADP activates a novel channel located on an acidic (lysosomal-like) calcium store, the mobilisation of which results in further calcium release from the endoplasmic reticulum. Here, we discuss the recent identification of a family o...

journal_title：Cell calcium

authors： Patel S,Marchant JS,Brailoiu E

更新日期：2010-06-01 00:00:00

abstract：:The mechanisms that regulate ion and fluid transport by the human intrahepatic bile duct have not been well defined. Human intrahepatic biliary cell lines that we have developed were used to identify and characterize purinoceptors based on increases in intracellular calcium in response to ATP and other nucleotides. In...

journal_title：Cell calcium

authors： Wolkoff LI,Perrone RD,Grubman SA,Lee DW,Soltoff SP,Rogers LC,Beinborn M,Fang SL,Cheng SH,Jefferson DM

更新日期：1995-05-01 00:00:00

abstract：:An important challenge in the study of Ca2+ signalling is to understand the dynamics of intracellular Ca2+ levels during and after physiological stimulation. While extensive information is available regarding the structural and biophysical properties of Ca2+ channels, pumps and exchangers that control cellular Ca2+ mo...

journal_title：Cell calcium

authors： Friel DD

更新日期：2000-11-01 00:00:00

abstract：:Calcium-activated potassium channels are important in a variety of smooth muscles, contributing to excitability and contractility. In the myometrium previous work has focussed on the large conductance channels (BK), and the role of small conductance channels (SK) has received scant attention, despite the finding that ...

journal_title：Cell calcium

authors： Noble K,Floyd R,Shmygol A,Shmygol A,Mobasheri A,Wray S

更新日期：2010-01-01 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：:Using single-cell ratio imaging of Fura-2-loaded neutrophils, we demonstrate that the heterogeneity and asynchrony of the oxidase response originates from variability in the timing and magnitude of the cytosolic free Ca2+ signal. The Ca2+ signals from individual cells could be classified into four types: (a) type 1, a...

journal_title：Cell calcium

authors： Hallett MB,Davies EV,Campbell AK

更新日期：1990-11-01 00:00:00

abstract：:The present study was undertaken to determine in fetal rat osteoblasts whether and how the intracellular messengers calcium and cAMP are involved in stimulation of ornithine decarboxylase (ODC) activity. For that purpose we used different drugs affecting [Ca2+]i and cAMP concentration. A23187 stimulates ODC activity i...

journal_title：Cell calcium

authors： van Leeuwen JP,Bos MP,Herrmann-Erlee MP

更新日期：1988-08-01 00:00:00

abstract：:Katz and co-workers showed that Ca(2+) triggers exocytosis. The existence of sub-micrometer domains of greater than 100 microM [Ca(2+)](i) was postulated on theoretical grounds. Using a modified, low-affinity aequorin, Llinas et al. were the first to demonstrate the existence of Ca(2+) 'microdomains' in squid presynap...

journal_title：Cell calcium

authors： Oheim M,Kirchhoff F,Stühmer W

更新日期：2006-11-01 00:00:00

abstract：:The adenine nucleotide translocator (ANT) is an autoantigen in myocarditis and dilated cardiomyopathy. Carrier-specific antibodies impair myocardial energy metabolism and heart function. They cross-react with a myolemmal calcium channel and alter calcium fluxes in isolated myocytes. To test whether antibodies against ...

journal_title：Cell calcium

authors： Schulze K,Heineman FW,Schultheiss HP,Balaban RS

更新日期：1999-05-01 00:00:00

abstract：:Removal of the epithelium from preparations of guinea-pig airways in vitro increases the responsiveness of the smooth muscle of normal and ovalbumin-sensitized animals to a number of contractile agents. To determine if epithelium removal results in an increase in Ca2+ entry into the smooth muscle, the effect of removi...

journal_title：Cell calcium

authors： Raeburn D,Hay DW,Fedan JS

更新日期：1987-12-01 00:00:00

abstract：:The type 1 inositol 1,4,5-trisphosphate receptor (IP3R1) mediates increases in the intracellular concentration of Ca(2+) ([Ca(2+)]i) during fertilization in mammalian eggs. The activity of IP3R1 is enhanced during oocyte maturation, and phosphorylations by M-phase kinases are thought to positively regulate the activit...

journal_title：Cell calcium

authors： Zhang N,Yoon SY,Parys JB,Fissore RA

更新日期：2015-11-01 00:00:00

abstract：:We analyzed spatio-temporal characteristics of Ca2+ transients in the cytosol and the nucleus of cultured neonatal rat heart cells using confocal imaging with Indo-1 and Fluo-3. In resting heart muscle cells, nuclear [Ca2+] was maintained lower than the cytosolic level. The rise in nuclear [Ca2+], during either E-C co...

journal_title：Cell calcium

authors： Minamikawa T,Takahashi A,Fujita S

更新日期：1995-03-01 00:00:00

abstract：:Mathematical models are often used to elucidate mechanisms behind cytosolic Ca2+ oscillations. We have evaluated the use of mathematical modelling to analyse and quantify Ca2+ signal patterns, in single, adherent human neutrophils (PMN) after stimulation by the bacterial peptide N-formyl-methionyl-leucyl-phenylalanine...

journal_title：Cell calcium

authors： Røtnes JS,Røttingen JA

更新日期：1994-06-01 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：:Several potentially life-threatening cardiovascular and respiratory disorders result in prolonged deprivation of oxygen, which in turn results in significant cellular adaptation, or remodelling. An important component of this functional adaptation arises as a direct consequence of altered ion channel expression by chr...

journal_title：Cell calcium

authors： Peers C,Kemp PJ

更新日期：2004-09-01 00:00:00

abstract：:The endoplasmic reticulum (ER) and mitochondria cannot be considered as static structures, as they intimately communicate, forming very dynamic platforms termed mitochondria-associated membranes (MAMs). In particular, the ER transmits proper Ca2+ signals to mitochondria, which decode them into specific inputs to regul...

journal_title：Cell calcium

authors： Marchi S,Patergnani S,Missiroli S,Morciano G,Rimessi A,Wieckowski MR,Giorgi C,Pinton P

更新日期：2018-01-01 00:00:00