Related Experiment Video
Updated: Jun 10, 2026
10:07
High-throughput Screening for Small-molecule Modulators of Inward Rectifier Potassium Channels
Published on: January 27, 2013
Substituted biaryl pyrazoles as sodium channel blockers
Sriram Tyagarajan1, Prasun K Chakravarty, Bishan Zhou
1Department of Medicinal Chemistry, Merck Research Laboratories, Rahway, NJ 07065, USA. sriram_tyagarajan@merck.com
Bioorganic & Medicinal Chemistry Letters
|August 17, 2010
Summary
New drug candidates targeting voltage-gated sodium channels show promise for treating neuropathic pain. Compound 26, a selective Nav1.7 blocker, demonstrated significant efficacy in preclinical models.
Area of Science:
- Neuroscience
- Pharmacology
- Medicinal Chemistry
Background:
- Voltage-gated sodium channels are implicated in the pathophysiology of neuropathic pain.
- Selective modulation of specific sodium channel subtypes is a therapeutic strategy for pain management.
Purpose of the Study:
- To identify and characterize novel small molecule inhibitors of voltage-gated sodium channels for neuropathic pain treatment.
- To evaluate the in vitro and in vivo efficacy of novel pyrazole carboxamide derivatives.
Main Methods:
- Synthesis and in vitro characterization of biaryl substituted pyrazole carboxamides.
- In vivo assessment of compound efficacy in the Chung model of neuropathic pain.
Main Results:
- A series of low molecular weight biaryl substituted pyrazole carboxamides were synthesized.
- Compound 26 exhibited potent Nav1.7 channel blockade.
- Compound 26 demonstrated excellent efficacy in the Chung model of neuropathic pain.
Conclusions:
- Biaryl substituted pyrazole carboxamides represent a promising class of compounds for neuropathic pain therapy.
- Selective Nav1.7 inhibition is a viable strategy for treating neuropathic pain.
- Compound 26 warrants further investigation as a potential therapeutic agent.
Related Concept Videos
01:22Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers
Class I antiarrhythmic drugs are used to treat various types of arrhythmias or irregular heart rhythms. These drugs block the sodium (Na+) channels in the cardiac cells, thereby affecting the movement of electrical impulses across the heart. Class I antiarrhythmic drugs are divided into three subgroups: Class IA, Class IB, and Class IC, each with distinct mechanisms of action and effects on the heart.
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
01:08Antiepileptic Drugs: Sodium Channel Blockers
Antiepileptic drugs are specialized medications that prevent seizures in individuals diagnosed with epilepsy. These drugs primarily function by blocking the movement of sodium ions through channels in the neuronal membrane, inhibiting the repetitive firing of action potentials often associated with seizures.
Sodium channel blockers modulate ion channels, particularly voltage-gated sodium channels. They block only sodium ion movement.
Among the most commonly prescribed antiepileptic drugs are...
Sodium channel blockers modulate ion channels, particularly voltage-gated sodium channels. They block only sodium ion movement.
Among the most commonly prescribed antiepileptic drugs are...
01:20Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers
Class IV antiarrhythmic drugs, such as verapamil and diltiazem, block calcium channels. They primarily affect the heart, slowing the conduction in calcium-dependent tissues like the SA and AV nodes. These drugs manage reentrant supraventricular tachycardia (SVT) and reduce ventricular rate in atrial flutter/fibrillation.
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
01:12Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of the heart's...
01:17Antiepileptic Drugs: Calcium Channel Blockers
Calcium channel blockers, a class of antiepileptic drugs, regulate the flow of calcium ions within neurons.
Calcium channel blockers exert their antiepileptic effects by targeting T-type calcium channels, which are integral to transmitting nerve signals in the central nervous system. These channels allow the passage of calcium ions, which are vital for neuronal communication. By inhibiting T-type calcium channels, calcium channel blockers effectively reduce the release of neurotransmitters and...
Calcium channel blockers exert their antiepileptic effects by targeting T-type calcium channels, which are integral to transmitting nerve signals in the central nervous system. These channels allow the passage of calcium ions, which are vital for neuronal communication. By inhibiting T-type calcium channels, calcium channel blockers effectively reduce the release of neurotransmitters and...
01:18Antihypertensive Drugs: Action of Calcium Channel Blockers
Calcium ions are essential to contract smooth muscle cells in blood vessels. They enter these cells through voltage-dependent calcium channels, specifically L-type calcium channels in the cell membrane. These L-type calcium channels are integral to the excitation-contraction coupling process in smooth muscle. When a stimulus is received by smooth muscle cells, their membrane depolarizes. This alteration in membrane potential instigates the opening of L-type calcium channels. As a result,...