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SCAN HISTORY SPTR39_14f 4 10 NSINGLE INITIAL MOTIF SETS EAGCHANNEL1 Length of motif = 8 Motif number = 1 EAG potassium channel motif I - 1 PCODE ST INT ENIIRRSN CIKE_DROME 17 17 ENIVRRSN O18966 19 19 ENIVRRSN O18965 19 19 ENIVRRSN O95259 19 19 ENIVRRSN Q60603 19 19 ENIVRRSN O76035 19 19 ENIVRRSN Q63472 19 19 EAGCHANNEL2 Length of motif = 14 Motif number = 2 EAG potassium channel motif II - 1 PCODE ST INT APIRNERDLVVLFL CIKE_DROME 134 109 APIRNEQDKVVLFL O18966 114 87 APIRNEQDKVVLFL O18965 114 87 APIRNEQDKVVLFL O95259 114 87 APIRNEQDKVVLFL Q60603 114 87 APIRNEQDKVVLFL O76035 114 87 APIRNEQDKVVLFL Q63472 114 87 EAGCHANNEL3 Length of motif = 12 Motif number = 3 EAG potassium channel motif III - 1 PCODE ST INT TFRDITALKQPI CIKE_DROME 149 1 TFSDITAFKQPI O18966 129 1 TFSDITAFKQPI O18965 129 1 TFSDITAFKQPI O95259 129 1 TFSDITAFKQPI Q60603 129 1 TFSDITAFKQPI O76035 129 1 TFSDITAFKQPI Q63472 129 1 EAGCHANNEL4 Length of motif = 13 Motif number = 4 EAG potassium channel motif IV - 1 PCODE ST INT ...
UniProt: KCNH2 CANLF
ID KCNH2_CANLF Reviewed; 1158 AA. AC Q9TSZ3; O02719; O18820; DT 28-NOV-2002, integrated into UniProtKB/Swiss-Prot. DT 01-MAY-2000, sequence version 1. DT 27-SEP-2017, entry version 129. DE RecName: Full=Potassium voltage-gated channel subfamily H member 2; DE AltName: Full=Ether-a-go-go-related gene potassium channel 1; DE Short=DERG; DE Short=ERG-1; DE Short=Eag-related protein 1; DE Short=Ether-a-go-go-related protein 1; DE Short=c-ERG; DE AltName: Full=Voltage-gated potassium channel subunit Kv11.1; GN Name=KCNH2; Synonyms=CERG, ERG; OS Canis lupus familiaris (Dog) (Canis familiaris). OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; OC Mammalia; Eutheria; Laurasiatheria; Carnivora; Caniformia; Canidae; OC Canis. OX NCBI_TaxID=9615; RN [1] RP NUCLEOTIDE SEQUENCE [MRNA]. RC TISSUE=Heart; RX PubMed=11417212; DOI=10.1007/s004240100524; RA Zehelein J., Zhang W., Koenen M., Graf M., Heinemann S.H., Katus H.A.; RT Molecular cloning and expression of cERG, the ether a ...
Human Ether-A-Go-Go Related Gene Channels | BACE1 Inhibitors for the Treatment of Alzheimers Disease
Multiple sclerosis (MS) can be an autoimmune disease seen as a chronic swelling in the central anxious program (CNS) which leads to permanent neuronal harm and substantial impairment in individuals. Since these constructions were connected with a more serious disease course it is rather vital that you gain insight in to the system of induction their exact function and medical significance. Mechanistic research in individuals are limited. Nevertheless a few research in the 6-Shogaol MS pet model experimental autoimmune encephalomyelitis (EAE) recapitulate TLO development in the CNS and 6-Shogaol offer new understanding into CNS TLO features development and function. This review summarizes what we realize up to now about CNS TLOs in MS and what weve learned all about them from EAE versions. It also shows the areas that may need further experimental are we are simply starting to understand and measure the trend of CNS TLOs. cytotoxic injury and indirect systems e.g. by inducing activation of ...
Visualizing Mutation-Specific Differences in the Trafficking-Deficient by Allison R. Hall, Corey L. Anderson et al.
KCNH2 encodes the Kv11.1 α-subunit that underlies the rapidly activating delayed-rectifier K+ current in the heart. Loss-of-function KCNH2 mutations cause long QT syndrome type 2 (LQT2), and most LQT2-linked missense mutations inhibit the trafficking of Kv11.1 channel protein to the cell surface membrane. Several trafficking-deficient LQT2 mutations (e.g., G601S) generate Kv11.1 proteins that are sequestered in a microtubule-dependent quality control (QC) compartment in the transitional endoplasmic reticulum (ER). We tested the hypothesis that the QC mechanisms that regulate LQT2-linked Kv11.1 protein trafficking are mutation-specific. Confocal imaging analyses of HEK293 cells stably expressing the trafficking-deficient LQT2 mutation F805C showed that, unlike G601S-Kv11.1 protein, F805C-Kv11.1 protein was concentrated in several transitional ER subcompartments. The microtubule depolymerizing drug nocodazole differentially affected G601S- and F805C-Kv11.1 protein immunostaining. Nocodazole caused G601S
British Library EThOS: The effects of acidosis on the hERG potassium channel
The human ether-a-go-go-related gene (hERG) encodes channels mediating the rapid delayed rectifier K+ current (IKr). IKr participates in cardiac action potential (AP) repolarisation and may also protect the ventricles against premature stimulation. The heart is exposed to acidosis (low pH) in a number of pathological conditions including myocardial ischemia. Extracellular acidosis is known to modulate hERG current (IhERG) function, although a number of aspects of the modulation remain incompletely understood. The aims of this investigation were to establish the effects of acidosis on: (i) IhERG amplitude, kinetics and the response to premature stimulation at mammalian physiological temperature; (ii) the hERG blocking potency of selected anti arrhythmic drugs. Whole-cell patch-clamp recordings of IhERG were made from mammalian cells (CHO or HEK 293) at 37 QC. Lowering external pH from 7.4 to 6.3 reduced the magnitude of IhERG by reducing macroscopic hERG conductance and modulating IhERG kinetics, ...
Generation of an antibody toolbox to characterize hERG - Zurich Open Repository and Archive
The human ether-a-go-go related gene (hERG) potassium channel plays a major role in the repolarization of the cardiac action potential. Inhibition of the hERG function by mutations or a wide variety of pharmaceutical compounds cause long QT syndrome and lead to potentially lethal arrhythmias. For detailed insights into the structural and biochemical background of hERG function and drug binding, the purification of recombinant protein is essential. Because the hERG channel is a challenging protein to purify, fast and easy techniques to evaluate different expression, solubilization and purification conditions are of primary importance. Here, we describe the generation of a set of 12 monoclonal antibodies against hERG. Beside their suitability in western blot, immunoprecipitation and immunostaining, these antibodies were used to establish a sandwich ELISA for the detection and relative quantification of hERG in different expression systems. Furthermore, a Fab fragment was used in fluorescence size ...
Mechanism of Loss of Kv11.1 K+ Current in Mutant T421M-Kv11.1 Expressing Rat Ventricular Myocytes: Interaction of Trafficking...
Background-Type 2 long QT syndrome (LQT2) involves mutations in the human ether a-go-go-related gene (hERG or KCNH2). T421M, a S1 domain mutation in the Kv11.1 channel protein, was identified in a resuscitated patient. We assessed its biophysical, protein trafficking and pharmacological mechanisms in adult rat ventricular myocytes (ARVMs). Methods and Results-Isolated ARVMs were infected with WT- and T421M-Kv11.1 expressing adenovirus and analyzed using patch clamp, Western blot and confocal imaging techniques. Expression of WT- or T421M-Kv11.1 produced peak tail current (IKv11.1) of 8.78±1.18 and 1.91±0.22 pA/pF, respectively. Loss of mutant IKv11.1 resulted from, 1) a partially trafficking-deficient channel protein with reduced cell surface expression, and 2) altered channel gating with a positive shift in the voltage-dependence of activation and altered kinetics of activation and deactivation. Co-expression of WT+T421M-Kv11.1 resulted in heterotetrameric channels that remained partially ...
Reduction of hERG potassium currents by hyperosmolar solutions...
Reduction of hERG potassium currents by hyperosmolar solutions.: We investigated the effects of hyperosmolar solutions on human ether-a-go-go related gene (hERG
BRL-32872 - Wikipedia
BRL-32872s class III activity is directed towards the human ether-a-go-go-related gene (hERG) K+ channel.[4] hERG channels are the source of the delayed rectifier potassium current (IK); the current responsible for repolarization of the cardiac action potential. BRL-32872 binds with high affinity to open hERG channels, and inhibits the rapidly activating component of the IK.[4] BRL-32872 binding effectively increases the refractory period of the cell and prolongs the action potential. This blockage also reduces probability of re-entry depolarization, since signals are more likely to encounter tissue in a refractory state. This effect is particularly well suited for treating atrial and ventricular fibrillation, as it restores pacemaker control of the tissue to the SA and AV nodes.[3] The specific binding site of BRL-32872 on the hERG channel is unknown; evidence suggests however, that it lies within the channels pore, similar to other class III drugs.[4] ...
PRIME PubMed | Specific block of cloned Herg channels by clofilium and its tertiary analog LY97241
PubMed journal article: Specific block of cloned Herg channels by clofilium and its tertiary analog LY97241. Download Prime PubMed App to iPhone, iPad, or Android
Chuck Brown, Godfather of Go-Go, Dies at 75 | Hollywood Reporter
Chuck Brown, an icon of Washington, D.C.s funk music scene, died at the age of 75 on Wednesday.. The Washington Post reports that Browns manager has confirmed the death of the singer/guitarist, which followed a battle with pneumonia.. Brown is widely credited with creating go-go music, a percussion-based alternative to disco that resided in Washington in the mid-70s. After beginning his career as a guitarist with Jerry Butler and The Earls of Rhythm in the 1960s, Brown became a star by creating local anthems like Bustin Loose and I Need Some Money.. Brown stayed active after finding initial success, scoring another hit in 1984 with We Need Some Money (Bout Money), although the singers profile, like go-go music, failed to translate to a national audience. Brown was hospitalized with pneumonia last month, and in a message on Facebook, the Brown family extended their thanks and deepest appreciation to everyone for their concern, prayers and best wishes for Chuck Brown during his ...
Spannungsabhängiger Kaliumkanal Unterfamilie H Member 2
Gianulis EC et. al. (2011) Rescue of aberrant gating by a genetically encoded PAS (Per-Arnt-Sim) domain in several long QT syndrome mutant human ether-á-go-go-related gene potassium channels.. [^] ...
AID 613230 - Inhibition of human ERG V659A mutant channel expressed in HEK293 cells assessed decrease in blockade of potassium...
BioAssay record AID 613230 submitted by ChEMBL: Inhibition of human ERG V659A mutant channel expressed in HEK293 cells assessed decrease in blockade of potassium tail current at 1 mM by whole-cell patch clamp technique.
Human ERG is a proto-oncogene with mitogenic and transforming activity<...
TY - JOUR. T1 - Human ERG is a proto-oncogene with mitogenic and transforming activity. AU - Hart, A. H.. AU - Corrick, C. M.. AU - Tymms, M. J.. AU - Hertzog, P. J.. AU - Kola, I.. PY - 1995/1/1. Y1 - 1995/1/1. N2 - The ETS related gene, ERG, is one of 20 or more genes belonging to the ETS family of transcription factors. Translocation of the ERG gene t(21;22) results in the chimeric fusion transcript seen in approximately 10% of Ewings sarcomas. In addition, recent studies have shown that a reciprocal translocation t(21;16) of ERG gives rise to two aberrant transcripts seen in some forms of acute myeloid leukaemia. In vitro studies have linked the up regulation of ERG expression with stromal cell independence in erythroleukemic clones and shown that the ERG related genes ETS1 and ETS2 have a mitogenic and transforming activity when overexpressed in NIH3T3 cells. Interestingly ERGB/FLI-1, which is also involved in Ewings sarcoma translocations and shares a very high sequence identity with ERG ...
SYNTHESIZING IDEAS: July 2008
Structural model of hERG channels. (a) Key elements of hERG channel topology illustrated using the X-ray structure of KvAP. Two of the four subunits comprising the tetrameric channel are shown. (b) Model of the pore portion of hERG channel. The P-S6 fragment is shown for a dimer. Aromatic residues Phe656 and Tyr652 are critical for hERG block by most known small molecule ligands. Polar residues Thr623 and Ser624 modulate the binding potency for a number of reported hERG blockers ...
AID 767820 - Inhibition of human ERG expressed in HEK293 cells assessed as membrane depolarization at 3 uM by patch-clamp...
BioAssay record AID 767820 submitted by ChEMBL: Inhibition of human ERG expressed in HEK293 cells assessed as membrane depolarization at 3 uM by patch-clamp method.
New Publication: The Drosophila ERG channel seizure plays a role in the neuronal homeostatic stress response | The Ben-Shahar...
Alexiss paper, The Drosophila ERG channel seizure plays a role in the neuronal homeostatic stress response, has been published in PLOS...
Alignment of herg potassium channel with known structures of potassium channel Name: Prachi Sharma Superviser: Prof. Gert...
Prediction of hERG Potassium Channel Blocking Actions Using Combination of Classification and Regression Based Models: A Mixed...
Email: Kunal Roy ([email protected]; [email protected]). *Drug Theoretics and Cheminformatics Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India phone: +91-98315 94140; fax: +91-33-2837 1078;, URL ...
Abstract 418: Heteromeric Assembly Of hERG1 Channels Occurs Co-Translationally Via Amino-Terminal Interactions | Circulation
The human Ether-à-go-go-Related Gene (hERG) encodes channels producing IKr currents in the human heart. hERG subunits are encoded by two alternate transcripts, 1a and 1b, which are identical except for their divergent amino (N) termini. Mutations or drug block of the hERG channel can result in Long QT Syndrome (LQTS) leading to potentially fatal ventricular arrhythmias. Studying the assembly process of the hERG subunits is important in elucidating the varied mechanisms by which hERG mutations, many of which are unique to the 1a N-terminus, can result in trafficking defects and disease. Here, we tested the hypothesis that the preferential assembly of hERG 1b with 1a is mediated by N-terminal interactions. Our results demonstrate that 1a and 1b heteromerize in the endoplasmic reticulum. A previously identified C-terminal tetramerization domain is not required for this interaction. hERG 1a and1b N-termini were sufficient for inter-subunit association and in vitro binding assays demonstrated that ...
Living The Dream With Go-Go Rach: TOP TEN REASONS TO RUN FROM ALCOHOLICS ANONYMOUS (VIDEO)
Go-Go Rach once was a girl whose world was controlled by the idea that she was POWERLESS. After a chain of events, she realized shed been lied to. Now she does whatever she wants, whenever she wants, with whomever she chooses to do it with ...
Pride Go-Go Elite Traveller 3-Wheel Travel Scooter Reviews - Mobility Scooter Reviews - 4.6 out of 5 stars
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The Pride Go-Go Ultra X 3 wheel travel scooter includes a frame design that allows it to disassemble into 5 easy-to-manage pieces with the heaviest piece weighing only 28 pounds.
Go-Go Wit | Tighthead Brewing Company | BeerAdvocate
Go-Go Wit is a Witbier style beer brewed by Tighthead Brewing Company in Mundelein, IL. 3.57 average with 26 ratings, reviews and opinions.
Gene K Mizumoto, M.D. | Hoag Hospital
Gene K Mizumoto, M.D. specializes in Internal Medicine and is located in Anaheim, CA. Choose a doctor that chooses Hoag. Call (949) 610-7245
Sequential Magazine Celebrates Pride Month - Sequential
Around 1994, the first Queer Canadian independently published superhero (not a parody superhero) comic appeared - Go-Go Boy the Go-Go dancer with super speed! Oh you thought it was Northstar? Sorry! Go-Go Boy was created by Neil Johnston in Vancouver. This short-lived comic (three issues and an ashcan version) featured the super speed superhero fighting for the city against the conglomerate known as C.C.R.A.P. (Corporate Criminals, Rednecks and Politicians) and the mad scientist, Dr. Dioto. With the help of superheroes Power Tool, the Invisible Lesbian, Spoonettra, and Number Woman.. In 1997, Vellevision appeared. Maurice Vellekoop, an artist and illustrator in Toronto, had his work covering an 11-year period published in Vellevision A Cocktail of Comics and Pictures. Vellekoop may have the distinction of being the only artist to appear in every issue of Drawn & Quarterlys 1990 anthologies. Vellekoop is known more for his fun gay erotica work and pin ups found in ABC A Homoerotic Primer (1997), ...
Plus it
Results from this study show that hydrogen peroxide modulates the activation and deactivation kinetics of HERG, a channel that produces a current with characteristics similar to the major cardiac repolarizing current IKr. External application of H2O2 induced an acceleration of activation and deactivation of HERG and a negative shift of about 10 mV in V½ of the activation I-V curve (which reflects the acceleration of the activating current) at all H2O2 concentrations tested (30 μM, 100 μM, and 1 mM). These effects were not concentration-dependent in the range tested. The lower H2O2 concentrations tested in this study (30 and 100 μM) likely have physiological and pathological significance (Cavarocchi et al., 1986; Drummond et al., 2000). A faster HERG activation allows a greater amount of potassium ions to flow through the channel during the first 150 ms of the plateau phase of the action potential (where IKr is predominant). This effect can be involved in the APD reduction observed in ...
Adenoviral i-eag domains restored slow deactivation in | Open-i
Adenoviral i-eag domains restored slow deactivation in hiPSC-CMs.Representative tail currents recorded from hiPSC-CMs infected by: A, WT hERG1a.Ad; B, hERG1a(R5
Welcome to Repository@USM - USM Research and Publication
Yi, Fan Teah and Abduraman, Muhammad Asyraf and Amanah, Azimah and Adenan, Mohd Ilham and Sulaiman, Shaida Fariza and Mei, Lan Tan (2017) Data on the construction of a recombinant HEK293 cell line overexpressing hERG potassium channel and examining the presence of hERG mRNA and protein expression. Data in Brief, 14. pp. 584-591. ISSN 2352-3409 ...
Cyberskin Mouth Stroker Glo [TO1004003] - Masturbators
CYBERSKIN MOUTH STROKER GLO (TO1004003) by Topco - Glo-Glo a Go-Go fun, frolicky toys with a party personal. Glo-Glo a Go-Go captures the essence of club life and brings it to the bedroom with glow-in-the-dark strokers, cock...
I Drank Go-Go Juice: Jitters, Racing Heart, and a Crash | Miami New Times
Chances are youve seen or heard about Toddlers and Tiaras, the TLC show that features little children dressed like mini-hookers and the parents who...
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Pride Mobilitys Go-Go Elite Traveller Plus takes the 4-wheel scooter up a notch. The Go-Go Elite Traveller Plus comes complete with a front basket, flat-free wheels, lots of leg room, interchangeable color shrouds and a comfortable seat.
Vice in Go-Go Boots? - The New York Times
Imagine my delight when the hokey chick flick came out on the campaign trail, a Cinderella story so preposterous its hard to believe its not premiering on Lifetime.
hERG Channels | PARP inhibitor BMN-673 targeting of the mutant p53-PARP-MCM chromatin axis
Rules of mRNA translation is an instant and effective methods to few adjustments in the cellular environment with global prices of proteins synthesis. of cross-regulation between your ISR and additional tension response pathways, like the unfolded proteins response and mammalian focus on of rapamycin, and just how do these regulatory strategies give gene manifestation applications that are customized for specific tensions? This review shows latest advancements in each one of these certain specific areas of study, emphasizing how eIF2~P as well as the ISR make a difference metabolic health insurance and disease. Introduction The process of mRNA translation is usually dynamic and a primary level of control of protein abundance in mammalian cells (1). As such, regulation at the level of translation is usually a rapid and effective means for the cell to respond to many different stresses, including those impacting nutrition, such as AZD8055 for example deficiencies of amino glucose or acids and ...
ERG purified MaxPab mouse polyclonal antibody (B01P) - (H00002078-B01P) - Products - Abnova
Mouse polyclonal antibody raised against a full-length human ERG protein. ERG (AAH40168, 1 a.a. ~ 479 a.a) full-length human protein. (H00002078-B01P) - Products - Abnova
KCNH7 Gene - GeneCards | KCNH7 Protein | KCNH7 Antibody
Complete information for KCNH7 gene (Protein Coding), Potassium Voltage-Gated Channel Subfamily H Member 7, including: function, proteins, disorders, pathways, orthologs, and expression. GeneCards - The Human Gene Compendium
KCNH1-IT1 Gene - GeneCards | KCNH1-IT1 RNA Gene
Complete information for KCNH1-IT1 gene (RNA Gene), KCNH1 Intronic Transcript 1, including: function, proteins, disorders, pathways, orthologs, and expression. GeneCards - The Human Gene Compendium
anti-Kv11.1 antibody | GeneTex
Kv11.1 antibody (potassium voltage-gated channel, subfamily H (eag-related), member 2) for ICC/IF, IHC, IP, WB. Anti-Kv11.1 pAb (GTX54785) is tested in Human, Mouse, Rat samples. 100% Ab-Assurance.
Three-Dimensional Quantitative Structure-Activity Relationship for Inhibition of Human Ether-a-Go-Go-Related Gene Potassium...
Thank you for sharing this Journal of Pharmacology and Experimental Therapeutics article.. NOTE: We request your email address only to inform the recipient that it was you who recommended this article, and that it is not junk mail. We do not retain these email addresses.. ...
Investigating dynamic protocol-dependence of hERG potassium channel inhibition at 37 degrees C: Cisapride versus dofetilide :...
INTRODUCTION. Pharmacological inhibition of cardiac potassium channels encoded by hERG (human ether-à-go-go-related gene) is associated with QT interval prolongation and torsades de pointes arrhythmia. Electrophysiological assays of hERG channel inhibition are integral to the safety testing of novel drug candidates. This study was conducted to compare, for the high affinity hERG inhibitors dofetilide and cisapride, hERG blockade between action potential (AP) and conventional (step and step-ramp) screening waveforms. Furthermore, it evaluated dynamic (pulse-by-pulse) protocol-dependence of hERG channel inhibition by these drugs.. METHODS. Whole-cell patch-clamp recordings were made at 37 degrees C from hERG-expressing HEK 293 cells. Half-maximal inhibitory concentrations (IC(50) values) for I(hERG) blockade were obtained using conventional voltage clamp and action potential clamp, using previously digitised ventricular and Purkinje fibre (PF) AP waveforms.. RESULTS. A more marked variation in ...
Channelpedia
We investigated the subthreshold properties of an erg (ether-à-go-go-related gene) K(+) current in Purkinje cells of neonatal mice. Action potentials recorded from Purkinje cells in cerebellar slices exhibited a decreased threshold potential and increased frequency of spontaneous and repetitive activity following application of the specific erg channel blocker E-4031. Accommodation was absent before and after drug application. The erg current of these Purkinje cells activated at membrane potentials near -60 mV and exhibited fast gating kinetics. The functional importance of fast gating subthreshold erg channels in Purkinje cells was corroborated by comparing the results of action potential clamp experiments with erg1a, erg1b, erg2, and erg3 currents heterologously expressed in HEK cells. Computer simulations based on a NEURON model of Purkinje cells only reproduced the effects of the native erg current when an erg channel conductance like that of erg3 was included. Experiments with ...
High yield purification of full-length functional hERG K + channels produced in Saccharomyces cerevisiae | Microbial Cell...
The hERG potassium channel is essential for repolarization of the cardiac action
potential. Due to this vital function, absence of unintended and potentially
life-threatening interactions with hERG is required for approval of new drugs. The
structure of hERG is therefore one of the most sought-after. To provide purified
hERG for structural studies and new hERG biomimetic platforms for detection of
undesirable interactions, we have developed a hERG expression platform generating
unprecedented amounts of purified and functional hERG channels. Full-length hERG,
with or without a C-terminally fused green fluorescent protein (GFP) His
8-tag was produced from a codon-optimized hERG cDNA in
Saccharomyces cerevisiae. Both constructs
complemented the high potassium requirement of a knock-out Saccharomyces cerevisiae strain, indicating correct tetramer
assembly in vivo. Functionality was further
demonstrated by Astemizole binding to membrane embedded hERG-GFP-His
Chuck Brown, godfather of Go-Go music, dies at 75 / Boing Boing
Chuck Brown performing at the 20th St. Lucia Jazz Festival, May 8, 2011. REUTERS/Andrea De Silva. The artist widely credited with founding the Go-Go music genre died today. Chuck Brown was 75. Like many punk teens growing up in Virginia in the eighties, I discovered this DC-rooted genre of black American music by accident-a go-go…
Sci. Pharm. | Free Full-Text | Ligand Determinants of Drug Trapping in hERG Potassium Channels
Inhibition of hERG channels prolongs the ventricular action potential and correspondingly the QT-interval with the risk of torsade de pointes arrhythmias which may result in sudden cardiac death.[...]
A novel deletion-frameshift mutation in the S1 region of HERG gene in a Chinese family with long QT syndrome. | Docphin
PubMedID: 23981618 | A novel deletion-frameshift mutation in the S1 region of HERG gene in a Chinese family with long QT syndrome. | Chinese medical journal | 8/1/2013
hERG1 channels are overexpressed in glioblastoma multiforme and modulate VEGF secretion in glioblastoma cell lines | IRIS...
ABSTRACT Recent studies have led to considerable advancement in our understanding of the molecular mechanisms that underlie the relentless cell growth and invasiveness of human gliomas. Partial understanding of these mechanisms has (1) improved the classification for gliomas, by identifying prognostic subgroups, and (2) pointed to novel potential therapeutic targets. Some classes of ion channels have turned out to be involved in the pathogenesis and malignancy of gliomas. We studied the expression and properties of K+ channels in primary cultures obtained from surgical specimens: human ether a gò-gò related (hERG)1 voltage-dependent K+ channels, which have been found to be overexpressed in various human cancers, and human ether a gò-gò-like 2 channels, that share many of hERG1s biophysical features. The expression pattern of these two channels was compared to that of the classical inward rectifying K+ channels, IRK, that are widely expressed in astrocytic cells and classically considered a ...
Saxitoxin Is a Gating Modifier of hERG K+ Channels | JGP
The two main changes in hERG K+ current caused by STX (Fig. 1 and 2) observed at steady-state were the reduction of current amplitude and the shifting of activation curves toward more positive membrane potentials. STX, acting as a hERG K+ channel-gating modulator, alters membrane potential dependence of the open probability.. We can rule out a simple pore block mechanism based on several experimental observations. The decrease in current was greatest at membrane potentials where the activation curve was shifted the most, not where Popen was maximal (as expected for a open state pore blocker). There was no tail current crossover as is seen with some open state blockers that slowly dissociate from the open state during channel closure. The effects of STX were quite distinct from known pore blockers: MK-499 and ErgTx. Fig. 3 shows that STX failed to affect instantaneous hERG K+ current except through changes in gating. STX seemed to stabilize the closed state of hERG channels.. STX and TTX are ...
Comparative evaluation of hERG potassium channel blockade by antipsychotics.
Combined Use of MC4PC, MDL-QSAR, BioEpisteme, Leadscope PDM, and Derek for Windows Software to Achieve High-Performance, High-Confidence Mode of Action-Based Predictions of Chemical Carcinogenesis in Rodents. Authors: Edwin J. Matthews; Naomi L. Kruhlak; R. Daniel Benz; Joseph F. Contrera; Carol A. Marchant; Chihae Yang. Journal: To ...
Channelpedia
HERG K(+) channel, the genetic counterpart of rapid delayed rectifier K(+) current in cardiac cells, is responsible for many cases of inherited and drug-induced long QT syndromes. HERG has unusual biophysical properties distinct from those of other K(+) channels. While the conventional pulse protocols in patch-clamp studies have helped us elucidate these properties, their limitations in assessing HERG function have also been progressively noticed. We employed AP-clamp techniques using physiological action potential waveforms recorded from various regions of canine heart to study HERG function in HEK293 cells and identified several novel aspects of HERG function. We showed that under AP-clamp IHERG increased gradually with membrane repolarization, peaked at potentials around 20-30 mV more negative than revealed by pulse protocols and at action potential duration (APD) to 60%-70% full repolarization, and fell rapidly at the terminal phase of repolarization. We found that the rising phase of IHERG ...
State-dependent electrostatic interactions of S4 arginines with E1 in S2 during Kv7.1 activation | JGP
Our results show that E1 interacts electrostatically with S4 arginines during Kv7.1 activation. We can propose a mechanism by which the E1K mutation causes long QT syndrome. Mutating E1 to a positively charged residue repels S4 arginines to prevent S4 from moving to an activated conformation. This energetic blockade of S4 gating motion inhibits channels from opening and conducting current. Loss of IKs current reduces the total repolarizing current in the heart and prolongs the ventricular action potential, leading to long QT syndrome.. Kv7.1 has provided us with a unique opportunity to study electrostatic interactions between S2 and S4 in functional channels. In contrast to Shaker, in which charge reversal of E1 resulted in maturation-deficient channels (Tiwari-Woodruff et al., 1997), Kv7.1 was able to assemble and traffic to the membrane but could not conduct current. Thus, we were able to identify electrostatic interactions that are important for channel function. We performed paired charge ...
publisher:(Simon Fraser University) - OATD
hERG encodes the pore-forming α-subunit of the voltage-gated potassium channel that underlies the rapid delayed rectifier current, IKr, in the heart, which is essential for normal cardiac electrical activity and rhythm. Inherited mutations in, or pharmacological blockade of, hERG channels deplete the cardiac repolarization reserve, increasing the risk of life-threatening arrhythmias. The molecular bases of hERG gating events and drug binding are poorly understood. hERG channels display unique gating characteristics critical for their physiological function. They activate and deactivate slowly, yet inactivate and recover from inactivation rapidly. In addition, the promiscuous nature of drug interactions with hERG channels presents a therapeutic challenge for drug design and development. My thesis provides novel mechanistic and structural characterization of the unusual activation and deactivation gating processes of hERG. In my first study, I used a proline scan approach to define the activation ...
Author
The human ether-à-go-go-related gene (HERG) encodes the protein underlying the cardiac potassium current IKr. Mutations in HERG may produce defective channels and cause Long QT Syndrome (LQTS), a cardiac disease affecting ...
Acrocell Announces Release of hERG Channel to Evaluate Compound Cardiovascular Safety and Support Drug Development - NCR Online...
Cardiovascular complications caused by drugs limit the use of many successful clinical treatments, such as anticancer therapies. During the entire process of new drug development, tremendous efforts and investments have been made to identify the adverse effects of the cardiovascular system and minimize the risk of patients. Approximately one-third of the compounds in preclinical development show some degree of heart disease risk.. One of the most important cardiovascular (CVS) responsibilities in safety pharmacology is a life-threatening disease called Torsades de pointes (TdP), which is mainly mediated by changes in the activity of hERG (Kv11.1) channels and other important cardiac ion channels. Acroscell is composed of a group of experts with many years of experience in ion channel safety determination and cardiotoxicity assessment. It can provide electrophysiological services for in vitro determination, including hERG safety evaluation.. Acroscell has developed GLP-compliant in vitro ...
Difference between revisions of User:Xiaodong Liu - OpenWetWare
ResearcherID 1. Liu X, Yang PS, Yang W, and Yue DT. Enzyme-inhibitor-like tuning of Ca(2+) channel connectivity with calmodulin. Nature 2010 Feb 18; 463(7283) 968-72. doi:10.1038/nature08766 pmid:20139964. 2. Chen P, Liu XD, Zhang W, Zhou J, Wang P, Yang W, and Luo J. Modeling and simulation of ion channels and action potentials in taste receptor cells. Sci China C Life Sci 2009 Nov; 52(11) 1036-47. doi:10.1007/s11427-009-0138-9 pmid:19937202. 3. Liu XD and Kourennyi DE. Effects of tetraethylammonium on Kx channels and simulated light response in rod photoreceptors. Ann Biomed Eng 2004 Oct; 32(10) 1428-42. pmid:15535060. 4. Kourennyi DE, Liu XD, Hart J, Mahmud F, Baldridge WH, and Barnes S. Reciprocal modulation of calcium dynamics at rod and cone photoreceptor synapses by nitric oxide. J Neurophysiol 2004 Jul; 92(1) 477-83. doi:10.1152/jn.00606.2003 pmid:14985410. 5. Sun H, Liu X, Xiong Q, Shikano S, and Li M. Chronic inhibition of cardiac Kir2.1 and HERG potassium channels by celastrol with ...
Difference between revisions of User:Xiaodong Liu - OpenWetWare
ResearcherID 1. Liu X, Yang PS, Yang W, and Yue DT. Enzyme-inhibitor-like tuning of Ca(2+) channel connectivity with calmodulin. Nature 2010 Feb 18; 463(7283) 968-72. doi:10.1038/nature08766 pmid:20139964. 2. Chen P, Liu XD, Zhang W, Zhou J, Wang P, Yang W, and Luo J. Modeling and simulation of ion channels and action potentials in taste receptor cells. Sci China C Life Sci 2009 Nov; 52(11) 1036-47. doi:10.1007/s11427-009-0138-9 pmid:19937202. 3. Liu XD and Kourennyi DE. Effects of tetraethylammonium on Kx channels and simulated light response in rod photoreceptors. Ann Biomed Eng 2004 Oct; 32(10) 1428-42. pmid:15535060. 4. Kourennyi DE, Liu XD, Hart J, Mahmud F, Baldridge WH, and Barnes S. Reciprocal modulation of calcium dynamics at rod and cone photoreceptor synapses by nitric oxide. J Neurophysiol 2004 Jul; 92(1) 477-83. doi:10.1152/jn.00606.2003 pmid:14985410. 5. Sun H, Liu X, Xiong Q, Shikano S, and Li M. Chronic inhibition of cardiac Kir2.1 and HERG potassium channels by celastrol with ...
Wonky Shattered Window Cathedral Block {tutorial} | Go-Go Kim
This is a super easy and fun wonky funky shattered glass window. The block measures a 12.5in unfinished block. By using the traditional folding method that most of us are familiar with, it is an easy way to make a new favorite with very little extra effort. The lines are edgy and the colors bright to give the block a stained glass look. This block can be made without the border as a regular Cathedral window quilt and has a very different looking back compared to the traditional quilt. By using Pellon wonder under with craft fuse, it makes a great home dec project by giving the extra crispness to the fabric. Using Pellon wonder under and Legacy batting will give a softer finish for a quilt. Either way, it is a great project and I am very thrilled to be invited to play! ...
A Drakes Progress: Go-Go
The condition is a chromosome disorder which affects the part of the brain which controls appetite, growth, and sexual development. Although too weak to feed as a baby, children with PWS grow to have an insatiable appetite, and never physically feel full up. But because their bodies cant convert fat to muscle efficiently, they have to be on a strict diet, for life. If their food intake isnt controlled, they will suffer from life-threatening obesity. People with PWS are of small stature, have some form of learning disability, are unable to have children, and are unlikely ever to be able to live an independent life. Oh, and by the way, theres no cure.. ...
AMD 1.1GHz Athlon a go-go • The Register
Following on the sneak preview of the 1.1GHz Athlon AMD showed us in room 1026 of the San Jose Tower and Hilton last week, the firm has announced availability of the part plus a clutch of PC customer wins.. Compaq, Big Blue, HP, Gateway, Fujitsu Siemens, and a raft of others are introducing machines based on the part. Theres one name missing from the list and thats Dell. Cough.. However, we wonder why AMD didnt just go ahead and introduce a 1.2GHz part and thus play its part in the now time-honoured game of chip leapfrog.. Intel introduced a 1.13GHz Pentium III earlier in the month, but thats only in limited quantities. So limited that one part seems to be doing the rounds of the UK magazines, for example.. Both Toms Hardware, and more recently, Hard OCP have reported problems with the 1.13GHz parts they have.. Mind you, you cant buy the 1.13GHz off the shelf in Frys, so if there are big problems, it will be up to the Dells of this world to solve them before they get to the end ...
Prilosec qtc Gastrointestinal, Online Store - January 15, 2018
Gastrointestinal Avail discounts for your favorite herbal medicine for order the best in herbal nutritional supplements and drugs. Prilosec qtcDoes omeprazole cause long qt or qt prolongation? - Answered by ....
physioreview12(Cardiac action potential) Flashcards - Cram.com
Study Flashcards On physioreview12(Cardiac action potential) at Cram.com. Quickly memorize the terms, phrases and much more. Cram.com makes it easy to get the grade you want!
Rep. John Dingell: Goldman Sachs Threatened the Well-Being of the Financial System | Vanity Fair
In 1999, Rep. John Dingell (D-MI) finally lost his long-running battle to protect the Glass-Steagall Act from the forces of deregulation, who didnt see the point of preventing lending banks from acting like investment banks. Dingell, the longest-serving member of Congress in U.S. history, occupies the same seat that his father, John D. Dingell Sr., won in 1933-the first year of F.D.R.s presidency. So its fair to say that he had a personal connection to a banking regulation that, by the end of the go-go 1990s, seemed unnecessarily quaint to many of his colleagues.
Before the vote to repeal Glass-Steagall, Dingell issued a stern warning on the floor of the House, declaring that the move would create
can withdrawal cause long term/permanent damage? - Addiction: Substance Abuse - MedHelp
Very confused about my situation right now. Heres a bit of a backstory...I had to ct off 1.5mg of xanax a day for 3 days over labor day weekend. I didnt realize how addicted I was until I didnt get ...
Cardiotoxicity Screening - Admescope
hERG assay is used for screening of compounds acting as potential ligands or blockers of hERG channel which is an indication for cardiotoxicity.
Best 25+ Pflanzenlexikon ideas on Pinterest | Kräuterkunde, Kräuterpflanzen and Kräuterpflanzen
Find and save ideas about Pflanzenlexikon on Pinterest. | See more ideas about Kräuterkunde, Kräuterpflanzen and Kräuterpflanzen.
IKRÀN: Things 2012 did to me so far ...
Child born in late eighties has lived through three decades 80s,90, and 00s before even turning thirty themselves. And if that didnt make you feel old how about this. ...
Best 25+ Berberitze ideas on Pinterest | Heilendes herz zitate, Pflanzenlexikon and Kräuterlexikon
Find and save ideas about Berberitze on Pinterest. | See more ideas about Heilendes herz zitate, Pflanzenlexikon and Kräuterlexikon.
수의학 초음파 기계 | SonoSite | KR
말 초음파 기계 소동물 초음파 기계 동물원 및 해양 포유류 초음파 기계 수의학 교육 가장 내구성이 높고 신뢰적이며 휴대 가능하고 사용하기 쉬운 수의 초음파 기계를 찾아보십시오. 업계 유일의 5년 보증. 수의사의 하루는 예측할 수 없으며 환자도 그렇습니다. 필요할 때 언제 어디서나 휴대 가능한 초음파가 필요합니다. 군용으로 처음 개발된 SonoSite 휴대용 및 키오스크 기반 시스템은 다음과 같은 특성으로 업계를 선도합니다. 휴대성 - SonoSite의 휴대용 초음파는 10파운드 미만입니다. 사용 용이성- 어떤 버튼도 필요하지 않을 때도 있습니다. 켠 후 몇 초 안에 이미지를 볼 준비가 완료됩니다. 신뢰성 - 새로운 SonoSite 제품의 5년 품질 보증을 통해 필요할 때
Kegel Exercise Archives - The Fit Crasher » Delivering The Skinny On What Makes You Sweat
If you havent included kegel exercises before, your not alone. Many women overlook the importance of maintaining a strong pelvic floor. As women age and especially after childbirth, the muscles at the bottom of our torso become weak due to gravity, weakness and by the stretching requirements of childbirth. By including kegel exercises, you can … Read moreThree simple exercises for pelvic floor strength. ...