Advertisement

Topics

Inhibition of hyperpolarization-activated cyclic nucleotide-gated channels by beta-blocker carvedilol.

08:00 EDT 10th August 2018 | BioPortfolio

Summary of "Inhibition of hyperpolarization-activated cyclic nucleotide-gated channels by beta-blocker carvedilol."

Carvedilol is a clinically broadly used and effective beta-blocker for treatment of congestive heart failure (CHF) and several clinical trials have demonstrated that carvedilol shows a favourable effect compared to other beta-blocking agents in patients with CHF. The mechanism underlying the advantage of carvedilol over other beta-blocking agents is not clearly understood. In addition to beta-blockers, inhibitors of hyperpolarization-activated cyclic nucleotide-gated (HCN) channels, which play a critical role in spontaneous rhythmic activity in the heart, have also been proposed to be suitable in reducing the heart rate and therefore beneficial for treatment of CHF. In the present study, we investigated the effect of carvedilol on HCN channels.

Affiliation

Journal Details

This article was published in the following journal.

Name: British journal of pharmacology
ISSN: 1476-5381
Pages:

Links

DeepDyve research library

PubMed Articles [12306 Associated PubMed Articles listed on BioPortfolio]

Insights into the molecular mechanism for hyperpolarization-dependent activation of HCN channels.

Hyperpolarization-activated, cyclic nucleotide-gated (HCN) ion channels are both voltage- and ligand-activated membrane proteins that contribute to electrical excitability and pace-making activity in ...

Hyperpolarization-activated and cyclic nucleotide-gated channel proteins as emerging new targets in neuropathic pain.

Hyperpolarization-activated and cyclic nucleotide-gated (HCN) channels are activated during hyperpolarization, and there is an inward flow of current, which is termed as hyperpolarization-activated cu...

Hyperpolarization-activated cyclic nucleotide-gated channels contribute to spontaneous activity in L4 C-fiber nociceptors, but not Aβ-non-nociceptors, after axotomy of L5-spinal nerve in the rat in vivo: Erratum.

Minimal molecular determinants of isoform-specific differences in efficacy in the HCN channel family.

Hyperpolarization-activated, cyclic nucleotide-gated (HCN) channels generate rhythmic activity in the heart and brain. Isoform-specific functional differences reflect the specializations required for ...

cAMP, Ca2+, pHi, and NO Regulate H-Like Cation Channels That Underlie Feeding and Locomotion in the Predatory Sea-Slug Pleurobranchaea californica.

A systems approach to regulation of neuronal excitation in the mollusc Pleurobranchaea has described novel interactions of cyclic AMP-gated cation current (INa,cAMP), Ca2+, pHi, and NO. INa,cAMP appea...

Clinical Trials [3105 Associated Clinical Trials listed on BioPortfolio]

The Beta Cell Responsiveness to Glucose-Dependent Insulinotropic Polypeptide (GIP) With and Without Sulfonylurea in Patients With Type 2 Diabetes

The investigators hypothesize that the impaired insulinotropic effect of the incretin hormone GIP may be due to inadequate sensitization and ATP induced closure of beta cell K-ATP channels...

Study of Afimoxifene Gel to Treat Cyclic Mastalgia in Premenopausal Women

The purpose of this study is to evaluate the efficacy of two doses of 4-hydroxy tamoxifen (4-OHT) compared with placebo on the intensity of cyclic mastalgia in pre-menopausal women with re...

Detection of Cav1 Calcium Channels in Inflammatory Cells of Asthmatic Children

Asthma affects about 10% of children and 6% of adults in industrialized countries. Lymphocytes (L) Th2, a T cell population (LT) producing interleukin (IL) -4, 5 and 13 are broadly involve...

Applying Nutrient Drink Test in Understanding Pathophysiology of CVS

Cyclic vomiting syndrome is a disorder characterized by nausea and vomiting, separated by periods without any symptoms. There is very little research on this field at this point and most d...

Blockade of Vascular Potassium Channels During Human Endotoxemia

Background: Activation of NO-synthase and vascular potassium (K) channels may play a role in the sepsis-induced attenuated sensitivity to norepinephrine. We examined whether various K ch...

Medical and Biotech [MESH] Definitions

A subgroup of cyclic nucleotide-regulated ION CHANNELS of the superfamily of pore-loop cation channels that are opened by hyperpolarization rather than depolarization. The ion conducting pore passes SODIUM, CALCIUM, and POTASSIUM cations with a preference for potassium.

Ion channels that are regulated by cyclic GMP or cyclic AMP binding and contain six transmembrane segments and an ion conducting pore that passes monovalent cations. They are expressed in OLFACTORY NERVE cilia and in PHOTORECEPTOR CELLS and some PLANTS. They are blocked by DILTIAZEM.

A cyclic nucleotide phosphodiesterase subfamily that is activated by the binding of CYCLIC GMP to an allosteric domain found on the enzyme. Multiple enzyme variants of this subtype can be produced due to multiple alternative mRNA splicing. The subfamily is expressed in a broad variety of tissues and may play a role in mediating cross-talk between CYCLIC GMP and CYCLIC CMP pathways. Although the type 2 enzymes are classified as 3',5'-cyclic-AMP phosphodiesterases (EC 3.1.4.17), members of this class have additional specificity for CYCLIC GMP.

A major class of calcium-activated potassium channels that are found primarily in excitable CELLS. They play important roles in the transmission of ACTION POTENTIALS and generate a long-lasting hyperpolarization known as the slow afterhyperpolarization.

A heterotrimeric GTP-binding protein that mediates the light activation signal from photolyzed rhodopsin to cyclic GMP phosphodiesterase and is pivotal in the visual excitation process. Activation of rhodopsin on the outer membrane of rod and cone cells causes GTP to bind to transducin followed by dissociation of the alpha subunit-GTP complex from the beta/gamma subunits of transducin. The alpha subunit-GTP complex activates the cyclic GMP phosphodiesterase which catalyzes the hydrolysis of cyclic GMP to 5'-GMP. This leads to closure of the sodium and calcium channels and therefore hyperpolarization of the rod cells. EC 3.6.1.-.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Relevant Topics

Clinical Approvals
Clinical trials are a set of procedures in medical research conducted to allow safety (or more specifically, information about adverse drug reactions and adverse effects of other treatments) and efficacy data to be collected for health interventions (e.g...

Cardiology
Cardiology is a specialty of internal medicine.  Cardiac electrophysiology : Study of the electrical properties and conduction diseases of the heart. Echocardiography : The use of ultrasound to study the mechanical function/physics of the h...


Searches Linking to this Article