Electrophysiological effects of the antiarrhythmic drug bepridil on the guinea-pig pulmonary vein myocardium.

Abstract:

:We compared effects of the antiarrhythmic drug bepridil on the electrophysiological parameters in the isolated pulmonary vein preparation from guinea pigs with those in the left atrium. Three pairs of bipolar electrodes were attached to the left atrium, pulmonary vein and junctional region of left atrium and pulmonary vein to measure intra-atrial and intra-pulmonary vein conduction velocity and effective refractory period. Bepridil at 10 µM prolonged the effective refractory period with little effect on the conduction velocity in the pulmonary vein, whereas the drug failed to affect the electrophysiological parameters in the left atrium. Using the conventional microelectrode technique, action potential of the isolated pulmonary vein preparation and left atrium were measured. Bepridil prolonged the action potential duration of the pulmonary vein more potently than that of the left atrium. These results suggest that antiarrhythmic effects of bepridil on reentry within the pulmonary vein are estimated to be greater than within the left atrium, which may be one of the key considerations to understand its antiarrhythmic mechanisms.

journal_name

Biol Pharm Bull

authors

Takahara A,Takeda K,Hagiwara M,Tanaka H

doi

10.1248/bpb.b12-00590

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

311-5

issue

2

eissn

0918-6158

issn

1347-5215

pii

DN/JST.JSTAGE/bpb/b12-00590

journal_volume

36

pub_type

杂志文章
  • Nucleotide sequence of the gene cluster containing the mphB gene for macrolide 2'-phosphotransferase II.

    abstract::Escherichia coli BM2506 produced macrolide 2'-phosphotransferase II [MPH (2') II]. A gene for MPH (2') II, designated mphB, is located on plasmids pTZ3721 and pTZ3723 in E. coli BM2506. In the present study, we determined the nucleotide sequence of the 6.5-kb EcoRI-PstI fragment containing mphB on pTZ3721. The DNA reg...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.22.227

    authors: Katayama J,Noguchi N

    更新日期:1999-02-01 00:00:00

  • Isosteviol Sodium Inhibits Astrogliosis after Cerebral Ischemia/Reperfusion Injury in Rats.

    abstract::Previous reports have indicated that isosteviol sodium (STVNa) has neuroprotective effects against acute focal cerebral ischemia in rats; however, the exact underlying mechanisms and ideal treatment paradigm are not known. To find a reasonable method for STVNa administration and to determine its possible therapeutic m...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b17-00921

    authors: Zhang H,Sun X,Xie Y,Tian F,Hu H,Tan W

    更新日期:2018-01-01 00:00:00

  • Immunological identification of vesicular nucleotide transporter in intestinal L cells.

    abstract::It is well established that vesicular nucleotide transporter (VNUT) is responsible for vesicular storage of nucleotides such as ATP, and that VNUT-expressing cells can secrete nucleotides upon exocytosis, playing an important role in purinergic chemical transmission. In the present study, we show that VNUT is expresse...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b14-00275

    authors: Harada Y,Hiasa M

    更新日期:2014-01-01 00:00:00

  • Investigation of the safety of topical metronidazole from a pharmacokinetic perspective.

    abstract::Metronidazole (MTZ) ointment has been used widely as a hospital preparation against cancerous malodor. Although cancerous tissue with ulcer-like symptoms is likely to have a higher capacity to absorb drugs than normal skin, the extent to which MTZ is absorbed when a topical preparation is applied to cancerous tissue r...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b12-00687

    authors: Iida J,Kudo T,Shimada K,Yatsuno Y,Yamagishi S,Hasegawa S,Ike H,Sato T,Kagaya H,Ito K

    更新日期:2013-01-01 00:00:00

  • Proton-coupled organic cation antiporter-mediated uptake of apomorphine enantiomers in human brain capillary endothelial cell line hCMEC/D3.

    abstract::R(-)-Apomorphine is a dopamine agonist used for rescue management of motor function impairment associated with levodopa therapy in Parkinson's disease patients. The aim of this study was to examine the role of proton-coupled organic cation antiporter in uptake of R(-)-apomorphine and its S-enantiomer in human brain, u...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b13-00773

    authors: Okura T,Higuchi K,Kitamura A,Deguchi Y

    更新日期:2014-01-01 00:00:00

  • Pharmacognostical studies of cistanchis herba (III) phylogenetic relationship of the cistanche plants based on plastid rps2 gene and rpl16-rpl14 intergenic spacer sequences.

    abstract::The phylogenetic relationship of Cistanche deserticola, C. salsa and C. tubulosa was analyzed by comparing the nucleotide sequences of the plastid rps2 gene and the intergenic spacer region between rpl16 and rpl14. By comparison of sequence data, the Cistanche samples were distinguishable from each other. The results ...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.25.218

    authors: Tomari N,Ishizuka Y,Moriya A,Kojima S,Deyama T,Mizukami H,Tu P

    更新日期:2002-02-01 00:00:00

  • Cell-density-dependent expression of the alpha(2)-adrenergic response by epidermal growth factor (EGF) in primary cultures of adult rat hepatocytes.

    abstract::Effects of epidermal growth factor (EGF) on the expression of alpha(2)-adrenergic responses were examined in primary cultures of adult rat hepatocytes. The alpha(2)-responses were assessed by the inhibition of the rate of forskolin-stimulated cAMP formation by the selective alpha(2)-adrenergic agonists, oxymetazoline ...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.19.518

    authors: Ogihara M

    更新日期:1996-04-01 00:00:00

  • Targeting the extracellular signal-regulated kinase pathway in cancer therapy.

    abstract::The extracellular signal-regulated kinase (ERK) pathway is a major determinant in the control of diverse cellular processes such as proliferation, survival, and motility. This pathway is often upregulated in human cancers and as such represents an attractive target for mechanism-based approaches to cancer treatment. H...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章,评审

    doi:10.1248/bpb.34.1781

    authors: Kohno M,Tanimura S,Ozaki K

    更新日期:2011-01-01 00:00:00

  • Utility of gastrointestinal physiology regulated-dogs: bioavailability study of a commercial sustained-release dosage form of theophylline.

    abstract::The utility of gastrointestinal physiology regulated-dogs (regulated-dogs) was evaluated in a bioavailability study. The gastrointestinal physiology of beagle dogs was regulated with a combined-treatment of intramuscular pentagastrin and intravenous atropine sulfate. Theophylline has been regarded as a drug that is ab...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.17.931

    authors: Sagara K,Kawata M,Mizuta H,Shibata M

    更新日期:1994-07-01 00:00:00

  • Baicalin Protects against TNF-α-Induced Injury by Down-Regulating miR-191a That Targets the Tight Junction Protein ZO-1 in IEC-6 Cells.

    abstract::Tumor necrosis factor-alpha (TNF-α) plays an important role in the developing process of inflammatory bowel disease. Tight junction protein zonula occludens-1 (ZO-1), one of epithelial junctional proteins, maintains the permeability of intestinal barrier. The objective of this study was to investigate the mechanism of...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b16-00789

    authors: Wang L,Zhang R,Chen J,Wu Q,Kuang Z

    更新日期:2017-04-01 00:00:00

  • Measurement of Serum Tenascin-X in Joint Hypermobility Syndrome Patients.

    abstract::Joint hypermobility syndrome (JHS) (also termed hypermobility type Ehlers-Danlos syndrome, hEDS) is a heritable connective tissue disorder that is characterized by generalized joint hypermobility, chronic pain, fatigue, and minor skin changes. Initially, it was reported that there is a small subset of patients with JH...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b19-00168

    authors: Yamada K,Watanabe A,Takeshita H,Fujita A,Miyake N,Matsumoto N,Matsumoto KI

    更新日期:2019-01-01 00:00:00

  • Prophylactic Oral Administration of Magnesium Ameliorates Dextran Sulfate Sodium-Induced Colitis in Mice through a Decrease of Colonic Accumulation of P2X7 Receptor-Expressing Mast Cells.

    abstract::The number of patients with colitis has been increasing year by year. Recently, intestinal inflammation, as one of the factors for its onset, has been demonstrated to be induced by P2X7 receptor-mediated activation of colonic immune cells such as mast cells. Activation of P2X7 receptor (P2X7R) is known to be inhibited...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b17-00143

    authors: Ohbori K,Fujiwara M,Ohishi A,Nishida K,Uozumi Y,Nagasawa K

    更新日期:2017-01-01 00:00:00

  • Protective effects of benidipine against myocardial damage following ischemia and reperfusion in the isolated perfused rat heart.

    abstract::We investigated the possible protective effects of benidipine (Coniel), a calcium antagonist, on mechanical dysfunction, metabolic damage and changes in vascular reactivity during ischemia and reperfusion in the Langendorff-perfused rat heart. The responses of perfusion pressure to U-46619, a vasoconstrictor, and acet...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.17.517

    authors: Yao K,Karasawa A

    更新日期:1994-04-01 00:00:00

  • Effect of methylcarbonylmethyl 2(S)-[4-(4-guanidino-benzoyloxy)phenyl] propionate methanesulfonate (TT-S24) on experimental pancreatitis in rats.

    abstract::The effect of methylcarbonylmethyl 2(S)-14-(4-guanidino-benzoyloxy) phenyl] propionate methanesulfonate (TT-S24) on experimental pancreatitis in rats was examined in comparison with that of camostat. TT-S24 showed a preventive effect on increases in plasma amylase activity and pancreatic weight induced by cerulein inj...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.21.227

    authors: Tagami H,Abe S,Yoshida Y,Tanaka I,Kamei C

    更新日期:1998-03-01 00:00:00

  • Improvement in the turnover rate of the stratum corneum in false aged model rats by the administration of geniposidic acid in Eucommia ulmoides Oliver Leaf.

    abstract::We earlier reported that collagen synthesis in false aged model rats was stimulated by the administration of a methanol extract from the leaves of Eucommia ulmoides OLIVER. When the methanol extract was fractionated to n-hexane, ethyl acetate, acetone and methanol fractions by silica gel chromatography, we discovered ...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.22.582

    authors: Li Y,Metori K,Koike K,Che QM,Takahashi S

    更新日期:1999-06-01 00:00:00

  • Berberine protects mesenchymal stem cells against hypoxia-induced apoptosis in vitro.

    abstract::Bone marrow mesenchymal stem cells (MSCs) have the potential to be used in the cellular therapy of solid organs. However, tissue regeneration is limited by the death of transplanted cells. One of the main mechanisms of stem cell death in transplanted organs is through ischemia. In the present study, we sought to inves...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.32.1335

    authors: Zhang W,Su X,Gao Y,Sun B,Yu Y,Wang X,Zhang F

    更新日期:2009-08-01 00:00:00

  • Characterization of capacitation inhibitory protein from rabbit seminal plasma: homology with human annexins.

    abstract::A protein was purified from rabbit seminal plasma using preparative acrylamide disc electrophoresis, ammonium sulfate precipitation and gel filtration. The protein inhibited the in vitro fertilization of mouse ova inseminated with epididymal sperm and with capacitated sperm. The inhibition was not observed, however, w...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.16.453

    authors: Okabe M,Kishi Y,Ying X,Kohama Y,Mimura T,Li SS

    更新日期:1993-05-01 00:00:00

  • Molecular cloning and characterization of genes involved in rosmarinic acid biosynthesis from Prunella vulgaris.

    abstract::Prunella vulgaris L., commonly known as "self-heal" or "heal-all," is a perennial herb with a long history of medicinal use. Phenylalanine ammonia-lyase (PAL), cinnamate 4-hydroxylase (C4H), and 4-coumarate:coenzyme-A (CoA) ligase (4CL) are important enzymes in the phenylpropanoid pathway and in the accumulation of ro...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b14-00139

    authors: Kim YB,Shin Y,Tuan PA,Li X,Park Y,Park NI,Park SU

    更新日期:2014-01-01 00:00:00

  • Structure function analysis of novel type III polyketide synthases from Arabidopsis thaliana.

    abstract::The genome sequencing project revealed presence of two active chalcone synthase (CHS) homologues (At1g02050 and At4g34850) in the model plant Arabidopsis thaliana. We report herein the two genes encode closely related novel plant-specific type III polyketide synthases (PKSs) that produces long-chain alkyl alpha-pyrone...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.31.2205

    authors: Mizuuchi Y,Shimokawa Y,Wanibuchi K,Noguchi H,Abe I

    更新日期:2008-12-01 00:00:00

  • Renin inhibition improves ovariectomy-induced osteoporosis of lumbar vertebra in mice.

    abstract::The skeletal renin–angiotensin system (RAS) is involved in the progression of osteoporosis and the active peptide within the RAS, angiotensin II (ANG II), has deleterious effects on bones. This study was performed to investigate whether suppression of the rate-limiting step of the RAS cascade by the renin inhibitor al...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b14-00576

    authors: Zhang FY,Yang FJ,Yang JL,Wang L,Zhang Y

    更新日期:2014-01-01 00:00:00

  • Cloning of polyketide synthase genes from amphidinolide-producing dinoflagellate Amphidinium sp.

    abstract::Cloning of polyketide synthase (PKS) gene for amphidinolide biosynthesis was attempted from a dinoflagellate Amphidinium sp. (strain Y-42). Fourteen beta-ketoacyl synthase gene fragments were obtained by Polymerase Chain Reaction (PCR) amplification from degenerated primer sets designed on the basis of the conserved a...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.29.1314

    authors: Kubota T,Iinuma Y,Kobayashi J

    更新日期:2006-07-01 00:00:00

  • Uptake of low molecular weight fractionated [3H]heparin by rat hepatocytes in the primary culture.

    abstract::The uptake of low molecular weight fractionated [3H]heparin (LMWFH: 7000 Da) was examined, for comparison with that of high molecular weight fractionated [3H]heparin (HMWFH:20000 Da), in a primary culture of rat hepatocytes. The uptake of LMWFH increased almost linearly with time up to 60 min (extended uptake), althou...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.18.443

    authors: Watanabe J,Urano K,Muranishi H,Haba M,Yuasa H

    更新日期:1995-03-01 00:00:00

  • Inhibition of the Inflammatory Pathway Enhances Both the in Vitro and in Vivo Transfection Activity of Exogenous in Vitro-Transcribed mRNAs Delivered by Lipid Nanoparticles.

    abstract::While the use of in vitro-transcribed mRNA (IVT-mRNA) in therapeutics is a rapidly expanding area, the transfection of the exogenous IVT-mRNA is accompanied by a risk of immune activation. This immunological defense mechanism suppresses cellular translation process and can reduce transfection efficiency to a considera...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b18-00783

    authors: Ohto T,Konishi M,Tanaka H,Onomoto K,Yoneyama M,Nakai Y,Tange K,Yoshioka H,Akita H

    更新日期:2019-01-01 00:00:00

  • Difference between yeast and bovine mitochondrial ADP/ATP carriers in terms of conformational properties of the first matrix loop as deduced by use of copper-o-phenanthroline.

    abstract::The mitochondrial ADP/ATP carrier (AAC) has 6 transmembrane regions and 3 matrix loops. Our previous mutational study on the Cys residue in the LM1s of chimeric bovine type 1 AAC (yN-bAAC1), in which the N-terminal 11 amino acids of bovine type 1 AAC are substituted with the corresponding 26 amino acids of yeast type ...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.30.885

    authors: Kihira Y,Ueno M,Terada H

    更新日期:2007-05-01 00:00:00

  • Nucleolin Acts as a Scavenger Receptor for Acetylated Low-Density Lipoprotein on Macrophages.

    abstract::Although macrophage phagocytoses modified low-density lipoprotein (LDL), excessive accumulation of modified LDL induces macrophage foam cell formation, which is a feature of atherosclerotic plaque. Thus, the identification of scavenger receptor for modified LDL will provide better understanding of an atherosclerotic e...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b15-00260

    authors: Miki Y,Tachibana Y,Ohminato Y,Fujiwara Y

    更新日期:2015-01-01 00:00:00

  • Glycolaldehyde induces cytotoxicity and increases glutathione and multidrug-resistance-associated protein levels in Schwann cells.

    abstract::Schwann cell injury is observed in diabetic neuropathy. It is speculated that glycolaldehyde (GA), a precursor of advanced glycation end products (AGEs), contributes to the pathogenesis and development of diabetic neuropathy. Here, we demonstrated for the first time that GA at near-physiological concentration decrease...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b13-00046

    authors: Sato K,Tatsunami R,Yama K,Tampo Y

    更新日期:2013-01-01 00:00:00

  • Pharmacokinetics of cyclosporin A after intravenous administration to rats in various disease states.

    abstract::We examine the pharmacokinetic profile of cyclosporin A (CyA) after intravenous administration to rats prepared as models of various disease states found in patients who receive organ transplantations. After intravenous bolus administration to normal rats, the total blood clearance (CLt) of CyA showed a dose-dependent...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.16.1130

    authors: Shibata N,Shimakawa H,Minouchi T,Yamaji A

    更新日期:1993-11-01 00:00:00

  • SPATA4 Counteracts Etoposide-Induced Apoptosis via Modulating Bcl-2 Family Proteins in HeLa Cells.

    abstract::Spermatogenesis associated 4 (SPATA4) is a testis-specific gene first cloned by our laboratory, and plays an important role in maintaining the physiological function of germ cells. Accumulated evidence suggests that SPATA4 might be associated with apoptosis. Here we established HeLa cells that stably expressed SPATA4 ...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b15-00117

    authors: Jiang J,Li L,Xie M,Fuji R,Liu S,Yin X,Li G,Wang Z

    更新日期:2015-01-01 00:00:00

  • Inhibition of double-stranded RNA-induced inducible nitric oxide synthase expression by fraxinellone and sauchinone in murine microglia.

    abstract::Fraxinellone and sauchinone, isolated from natural substance, are known to have an anti-inflammatory effect in inflammatory conditions. However, the anti-inflammatory actions of these compounds have been insufficiently demonstrated in viral-induced neuroinflammation. A viral component (double-stranded (ds)RNA) trigger...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.32.1870

    authors: Lee CS,Won C,Yoo H,Yi EH,Cho Y,Maeng JW,Sung SH,Ye SK,Chung MH

    更新日期:2009-11-01 00:00:00

  • Hydrogel-based ultra-moisturizing cream formulation for skin hydration and enhanced dermal drug delivery.

    abstract::To develop an external vehicle for skin hydration and enhanced dermal drug delivery, a hydrogel-based ultra-moisturizing cream (HUMC) was successfully formulated with carbopol 934P, urea, Tinocare GL, grape seed oil, and other excipients. The HUMC showed plastic flow behavior due to a gel structure with a cream base. ...

    journal_title:Biological & pharmaceutical bulletin

    pub_type: 杂志文章

    doi:10.1248/bpb.b14-00458

    authors: Lee SG,Kim SR,Cho HI,Kang MH,Yeom DW,Lee SH,Lee S,Choi YW

    更新日期:2014-01-01 00:00:00